CA2428983A1 - A new aluminum trihydroxide phase and catalysts made therefrom - Google Patents

A new aluminum trihydroxide phase and catalysts made therefrom Download PDF

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Publication number
CA2428983A1
CA2428983A1 CA002428983A CA2428983A CA2428983A1 CA 2428983 A1 CA2428983 A1 CA 2428983A1 CA 002428983 A CA002428983 A CA 002428983A CA 2428983 A CA2428983 A CA 2428983A CA 2428983 A1 CA2428983 A1 CA 2428983A1
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theta
catalyst
compounds
starting material
amount
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CA2428983C (en
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James Donald Carruthers
Eduardo Alberto Kamenetzky
Peter John Achorn
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Shell Internationale Research Maatschappij BV
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/0201—Impregnation
    • B01J37/0209—Impregnation involving a reaction between the support and a fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/02—Boron or aluminium; Oxides or hydroxides thereof
    • B01J21/04—Alumina
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/12—Silica and alumina
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/85—Chromium, molybdenum or tungsten
    • B01J23/88—Molybdenum
    • B01J23/882—Molybdenum and cobalt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/85—Chromium, molybdenum or tungsten
    • B01J23/88—Molybdenum
    • B01J23/883—Molybdenum and nickel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/08—Heat treatment
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F7/00—Compounds of aluminium
    • C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G35/00—Reforming naphtha
    • C10G35/04—Catalytic reforming
    • C10G35/06—Catalytic reforming characterised by the catalyst used
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G47/00—Cracking of hydrocarbon oils, in the presence of hydrogen or hydrogen- generating compounds, to obtain lower boiling fractions
    • C10G47/02—Cracking of hydrocarbon oils, in the presence of hydrogen or hydrogen- generating compounds, to obtain lower boiling fractions characterised by the catalyst used
    • C10G47/04—Oxides
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G49/00—Treatment of hydrocarbon oils, in the presence of hydrogen or hydrogen-generating compounds, not provided for in a single one of groups C10G45/02, C10G45/32, C10G45/44, C10G45/58 or C10G47/00
    • C10G49/02—Treatment of hydrocarbon oils, in the presence of hydrogen or hydrogen-generating compounds, not provided for in a single one of groups C10G45/02, C10G45/32, C10G45/44, C10G45/58 or C10G47/00 characterised by the catalyst used
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
    • C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/80—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70
    • C01P2002/82—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70 by IR- or Raman-data
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/12—Surface area
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/584—Recycling of catalysts

Abstract

A newly discovered phase of aluminum trihydroxide and supports and catalysts made therefrom. This invention also relates to methods of producing this new phase of aluminum trihydroxide and catalysts made therefrom, and to a method for improving the activity of and for regenerating catalysts having a silica - alumina support.

Claims (44)

1. A composition comprising an aluminum trihydroxide phase having measurable X-ray diffraction lines between about 2.theta. =18.15° and about 2.theta.
=18.50°, between about 2.theta. = 36.1° and about 2.theta. =
36.85°, between about
2.theta. = 39.45° and about 2.theta. = 40.30°, and between about 2.theta. = 51.48° and about 2.theta. = 52.59°.

2. The composition of Claim 1 further characterized in that the aluminum trihydroxide phase has measurable X-ray diffraction lines between about 2.theta.
= 27.35° and about 2.theta. = 27.90°, between about 2.theta. =
34.75° and about 2.theta. =
35.48°, and between about 2.theta. = 62.40° and about 2.theta. =
63.80°.
3. The composition of Claim 1 further characterized in that the aluminum trihydroxide phase does not have measurable X-ray diffraction lines between about 2.theta. = 20.15° and about 2.theta. = 20.65°.
4. The composition of Claim 1 further characterized in that the aluminum trihydroxide phase does not have measurable X-ray diffraction lines between about 2.theta. = 20.15° and about 2.theta. = 20.65° and between about 2.theta. = 37.35° and about 2.theta. = 37.75°.
5. The composition of Claim 1 further characterized in that the aluminum trihydroxide phase does not have measurable X-ray diffraction lines between about 2.theta. = 18.70° and about 2.theta. = 18.90°,between about 2.theta. = 20.30° and about 2.theta. = 20.50°, and between about 2.theta. = 40.30° and about 2.theta. = 40.70°.
6. The composition of Claim 1 further characterized in that the aluminum trihydroxide phase has measurable X-ray diffraction lines between about 2.theta.
= 27.35 .dottedcircle. and about 2.theta. = 27.90 .dottedcircle., between about 2.theta. = 34.75 .dottedcircle. and about 2.theta.
= 35.48 .dottedcircle., and between about 2.theta. = 62.40 .dottedcircle. and about 2.theta. = 63.80 .dottedcircle.; and does not have measurable peaks between about 2.theta. = 18.70 .dottedcircle. and about 2.theta. =
18.90 .dottedcircle., between about 2.theta. = 20.15 .dottedcircle. and about 2.theta. = 20.65 .dottedcircle., between about 2.theta. = 37.35.dottedcircle. and about 2.theta. = 37.75.dottedcircle. and between about 2.theta. = 40.30.dottedcircle. and about 2.theta. = 40.70 .dottedcircle. .
7. A catalyst precursor comprising the composition of Claim 1, 2, 3, 4, 5, or 6.
8. A process for making the composition of Claim 1, 2, 3, 4, 5, or 6, or the catalyst precursor of Claim 7, comprising:
(a) wetting a starting material comprising silica coated amorphous alumina comprising between about 4 wt.% and about 8 wt. % silica, wherein at least about 20 wt.% of said alumina is amorphous, by contact with an amount of chelating agent in a carrier liquid and a metallic compound;
(b) aging the so-wetted starting material while wet;
(c) drying the so-aged starting material at a temperature between about 100 °C and about 230°C and under conditions to substantially volatilize the carrier liquid; and (d) calcining the so-dried material.
9. The process of Claim 8 wherein the starting material comprises less than about 8 wt. % silica and at least 30 wt. % of the alumina is amorphous.
10. The process of Claim 8 wherein the starting material comprises between about 5 wt.% and about 7 wt. % silica and between about 20 wt. % and about 50 wt. % of the alumina is amorphous.
11. The process of Claim 8, 9 or 10 wherein the chelating agent is selected from ethylenediaminetetraacetic acid (EDTA), N-hydroxy ethylenediaminetetraacetic acid, diammonium ethylenediaminetetraacetic acid, tris(2-aminoethyl)amine, triethylenetetraamine, diethylenetriaminepentaacetic acid, cyclohexanediaminetetraacetic acid, ethyleneglycol-bis-(beta-aminoethylether)-N,N'-tetraacetic acid, or tetraethylenepentaamine.
12. The process of Claim 8, 9, 10 or 11 wherein the amount of chelating agent is between about 0.1 g and about 1.0 g per g of the starting material.
13. The process of Claim 8, 9, 10, 11 or 12 wherein aging of the so-wetted starting material while wet is done at room temperature for at least about 30 days.
14. The process of Claim 8, 9, 10, 11 or 12 wherein aging of the so-wetted starting material while wet is done at a temperature of as least 80°C
for at least about 2 days.
15. A catalyst comprising a support produced from the composition of Claim 1, 2, 3, 4, 5, or 6, or the catalyst precursor of Claim 7, and a catalytically active amount of one or more metals, metallic compounds, or combinations thereof.
16. The catalyst of Claim 15 wherein the one or more metals, metallic compounds, or combinations thereof are selected from the catalytically active transition metals of Group VIB and Group VIII of the Periodic Table, compounds thereof and combinations of such metals and compounds.
17. The catalyst of, Claim 15 wherein the catalyst further comprises a promoter.
18. The catalyst of Claim 17 wherein the promoter is selected from phosphorus, phosphorus compounds, and combinations thereof.
19. The catalyst of Claim 15, 16, 17 or 18 wherein the one or more metals, metallic compounds, or combinations thereof are selected from nickel, cobalt, molybdenum, and tungsten, compounds thereof and combinations of such metals and compounds.
20. The catalyst of Claim 19 wherein the one or more metals, metallic compounds, or combinations thereof comprise molybdenum or molybdenum compounds in an amount up to 35 wt. % calculated as MoO3, cobalt or cobalt compounds in an amount up to 9 wt. % calculated as CoO, and, optionally, phosphorus, phosphorus compounds, and combinations thereof in an amount up to 10 wt.% calculated as P2O5, wherein wt. % is based on the total catalyst weight.
21. The catalyst of Claim 19 wherein the one or more metals, metallic compounds, or combinations thereof comprise molybdenum or molybdenum compounds in an amount up to 35 wt. % calculated as MoO3, and nickel or nickel compounds in an amount up to 7 wt. % calculated as NiO, and, optionally, phosphorus, phosphorus compounds, and combinations thereof in an amount up to 10 wt.% calculated as P2O5, wherein wt. % is based on the total catalyst weight.
22. The catalyst of Claim 19 wherein the one or more metals, metallic compounds, or combinations thereof comprise molybdenum or molybdenum compounds in an amount up to 20 wt. % calculated as MoO3, and nickel and/or cobalt and compounds thereof in an amount up to 5 wt. % calculated as NiO and/or CoO, and, optionally, phosphorus, phosphorus compounds, and combinations thereof in an amount up to 10 wt.% calculated as P2O5, wherein wt. % is based on the total catalyst weight.
23. The catalyst of Claim 19 wherein the one or more metals, metallic compounds, or combinations thereof comprise molybdenum or molybdenum compounds in an amount up to 20 wt. % calculated as MoO3, and nickel and/or cobalt and compounds thereof in an amount up to 5 wt. % calculated as NiO and/or CoO, and, optionally, phosphorus, phosphorus compounds, and combinations thereof in an amount up to 6 wt.% calculated as P2O5, wherein wt. % is based on the total catalyst weight.
24. The catalyst of Claim 16 wherein the one or more metals is one or more noble metals in an amount up to 2 wt. % based on the total catalyst weight.
25. The catalyst of Claim 24 wherein the noble metal is Pt or a combination of Pt and Rh.
26. A process for treating a hydrocarbonaceous material comprising contacting said hydrocaxbonaceous material with the catalyst of Claim 15.
27. A process for the catalytic hydrodesulfurization of a hydrocarbon-containing feed comprising contacting the feed under hydrodesulfurization conditions with the catalyst of Claim 20.
28. A process for the catalytic hydrodenitrogenation of a hydrocaxbon-containing feed comprising contacting the feed under hydrodenitrogenation conditions with the catalyst of Claim 21.
29. A process for the catalytic hydrodernetallation of a hydrocarbon-containing feed comprising contacting the feed under hydrodemetallation conditions with the catalyst of Claim 22.
30. A process for the catalytic hydrocracking of a hydrocarbon-containing feed comprising contacting the feed under hydrocracking conditions with the catalyst of Claim 22.
31. A process for the catalytic hydroconversion of a hydrocarbon-containing feed comprising contacting the feed under hydroconversion conditions with the catalyst of Claim 23.
32. A process for the catalytic reforming of a hydrocarbon-containing feed comprising contacting the feed under reforming conditions with the catalyst of Claim 24.
33. A process for the catalytic hydrogenation-de hydrogenation of a hydrocarbon-containing feed comprising contacting the feed under hydrogenation-de hydrogenation conditions with the catalyst of Claim 25.
34. A process for the catalytic isomerization of a hydrocarbon-containing feed comprising contacting the feed under isomerization conditions with the catalyst of Claim 24.
35. A process for making the catalyst of Claim 15 comprising:
(a) forming a starting material comprising silica coated amorphous alumina comprising between about 4 wt.% and about 8 wt. % silica, wherein at least about 20 wt.% of said alumina is amorphous, into a shape;
(b) wetting the starting material by contact with an amount of chelating agent and a catalytically active amount of one or more metals, metallic compounds, or combinations thereof in a carrier liquid;

(c) aging the so-wetted starting material while wet;
(d) drying the so-aged starting material at a temperature between about 100 °C and about 230°C and under conditions to substantially volatilize the carrier liquid; and (e) calcining the so-dried material.
36. The process of Claim 35 wherein the starting material comprises less than about 8 wt. % silica and at least 30 wt. % of the alumina is amorphous.
37. The process of Claim 35 wherein the starting material comprises between about 5 wt.% and about 7 wt. % silica and between about 20 wt. % and about 50 wt. % of the alumina is amorphous.
38. The process of Claim 35, 36, or 37 wherein the chelating agent is selected from ethylenediaminetetraacetic acid (EDTA), N-hydroxy ethylenediaminetetraacetic acid, diammonium ethylenediaminetetraacetic acid, tris(2-aminoethyl)amine, triethylenetetraamine, diethylenetriaminepentaacetic acid, cyclohexanediaminetetraacetic acid, ethyleneglycol-bis-(beta-aminoethylether)-N,N'-tetraacetic acid, or tetraethylenepentaamine.
39. The process of Claim 35, 36, 37 or 38 wherein the amount of chelating agent is between about 0.1 g and about 1.0 g per g of the starting material.
40. The process of Claim 35, 36, 37, 38 or 39 wherein aging of the so-wetted starting material while wet is done at room temperature for at least about 30 days.
41. The process of Claim 35, 36, 37, 38 or 39 wherein aging of the so-wetted starting material while wet is done at a temperature of at least 80°C
for at least about 2 days.
42. A process for improving the catalytic activity of a silica-alumina supported catalyst comprising between about 4 wt.% and about 8 wt. % silica, wherein at least about 20 wt.% of said alumina is amorphous, and a metal or metal compound, comprising:
(a) wetting said catalyst by contact with a chelating agent in a carrier liquid;
(b) aging the so-wetted catalyst while wet;
(c) drying the so-aged catalyst at a temperature between about 100°C
and about 230°C and under conditions to substantially volatilize the carrier liquid; and (d) calcining the so-dried catalyst.
43. A process for regenerating a previously used silica-alumina supported catalyst comprising between about 4 wt.% and about 8 wt. % silica, wherein at least about 20 wt.% of said alumina is amorphous, and a metal or metal compound, comprising:
(a) removing material deposited on said catalyst during its previous use;
(b) wetting said catalyst by contact with a chelating agent in a carrier liquid;
(c) aging the so-wetted catalyst while wet;
(d) drying the so-aged catalyst at a temperature between about 100°C
and about 230°C and under conditions to substantially volatilize the carrier liquid; and (e) calcining the so-dried catalyst.
44. A process for making a catalyst tailored to the treatment of a hydrocarbonaceous material, comprising:
(a) determining the concentration of nitrogen-containing compounds in the hydrocarbonaceous material;
(b) choosing a starting material comprising silica coated amorphous alumina comprising between about 4 wt.% and about 8 wt. % silica, wherein at least about 20 wt.% of said alumina is amorphous, wherein said alumina has an appropriate concentration of silica so that, when wet-aged at an appropriate wet-aging temperature for an appropriate length of time forms a catalyst precursor, said catalyst precursor comprising a sufficient concentration of a composition comprising an aluminum trihydroxide phase having measurable X-ray diffraction lines between about 2.theta. = 18.15° and about 2.theta. =
18.50°, between about 2.theta. = 36.1 ° and about 2.theta. =
36.85°, between about 2.theta. = 39.45° and about 2.theta. = 40.30°, and between about 2.theta. =
51.48° and about 2.theta. = 52.59°, that a catalyst made from said catalyst precursor will be effective in treating said hydrocarbonaceous material;
wherein said appropriate concentration of silica, appropriate wet-aging temperature and appropriate length of time are chosen to be in proportion to the concentration of said nitrogen-containing compounds;
(c) forming said starting material into a shape;
(d) wetting said starting material by contact with a chelating agent and an amount of metal compound in a carrier liquid;
(e) aging the so-wetted starting material while wet at the temperature chosen in (b) for the length of time chosen in (b);
(f) drying the so-aged starting material at a temperature between about 100°C and about 230°C and under conditions to substantially volatilize the carrier liquid; and (g) calcining the so-dried material.
CA2428983A 2000-11-21 2001-11-19 A new aluminum trihydroxide phase and catalysts made therefrom Expired - Fee Related CA2428983C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/717,753 2000-11-21
US09/717,753 US6508999B1 (en) 2000-11-21 2000-11-21 Aluminum trihydroxide phase
PCT/US2001/043922 WO2002042210A2 (en) 2000-11-21 2001-11-19 A new aluminum trihydroxide phase and catalysts made therefrom

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Publication Number Publication Date
CA2428983A1 true CA2428983A1 (en) 2002-05-30
CA2428983C CA2428983C (en) 2010-06-08

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CA (1) CA2428983C (en)
DE (1) DE60127592T2 (en)
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