CA2064658A1 - Reclaiming e-caprolactam from nylon 6 carpet - Google Patents

Reclaiming e-caprolactam from nylon 6 carpet

Info

Publication number
CA2064658A1
CA2064658A1 CA2064658A CA2064658A CA2064658A1 CA 2064658 A1 CA2064658 A1 CA 2064658A1 CA 2064658 A CA2064658 A CA 2064658A CA 2064658 A CA2064658 A CA 2064658A CA 2064658 A1 CA2064658 A1 CA 2064658A1
Authority
CA
Canada
Prior art keywords
nylon
caprolactam
epsilon
scrap
carpet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2064658A
Other languages
French (fr)
Other versions
CA2064658C (en
Inventor
Thomas F. Corbin
Edward A. Davis
Jack A. Dellinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF Corp
Original Assignee
BASF Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=24887218&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2064658(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by BASF Corp filed Critical BASF Corp
Publication of CA2064658A1 publication Critical patent/CA2064658A1/en
Application granted granted Critical
Publication of CA2064658C publication Critical patent/CA2064658C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D201/00—Preparation, separation, purification or stabilisation of unsubstituted lactams
    • C07D201/02—Preparation of lactams
    • C07D201/12—Preparation of lactams by depolymerising polyamides
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
    • C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
    • C08G69/08—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from amino-carboxylic acids
    • C08G69/14—Lactams
    • 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
    • Y02P20/582—Recycling of unreacted starting or intermediate materials

Abstract

A process for the continuous recovery of .epsilon.-caprolactam provides a carpet made from nylon 6 fibers and having a backing to a separator to prepare scrap containing nylon 6 and waste. The scrap from the separator is fed to a depolymerizing reactor where the scrap is subjected to a depolymerization catalyst, temperatures of at least the melting point of nylon 6 and superheated steam to produce an .epsilon.-caprolactam containing distillate and more waste. The .epsilon.-caprolactam in the distillate is separated from other volatiles therein; and purified.
CA002064658A 1991-06-21 1992-04-01 Reclaiming e-caprolactam from nylon 6 carpet Expired - Lifetime CA2064658C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/718,720 US5169870A (en) 1991-06-21 1991-06-21 Reclaiming ε-caprolactam from nylon 6 carpet
US07/718,720 1991-06-24

Publications (2)

Publication Number Publication Date
CA2064658A1 true CA2064658A1 (en) 1992-12-25
CA2064658C CA2064658C (en) 1997-07-01

Family

ID=24887218

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002064658A Expired - Lifetime CA2064658C (en) 1991-06-21 1992-04-01 Reclaiming e-caprolactam from nylon 6 carpet

Country Status (5)

Country Link
US (1) US5169870A (en)
EP (1) EP0522235B1 (en)
JP (1) JPH05117441A (en)
CA (1) CA2064658C (en)
DE (2) DE522235T1 (en)

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US5977193A (en) * 1991-06-21 1999-11-02 Basf Corporation Reclaiming epsilon-caprolactam from nylon 6 carpet
US5370757A (en) * 1991-08-30 1994-12-06 Basf Corporation Process for manufacturing substantially 100% nylon 6 carpet
US5326791A (en) * 1991-12-20 1994-07-05 Exxon Research And Engineering Company Process for separation of hydrolyzable from non-hydrolyzable waste plastics for recovery of starting materials and other conversion processes, respectively
US5241066A (en) * 1992-06-25 1993-08-31 Basf Corporation Method of recovering caprolactam from mixed waste
DE59307118D1 (en) * 1993-01-28 1997-09-18 Polymer Eng Gmbh Process and device for producing polyamide 6 from polyamide waste
US5294707A (en) * 1993-02-25 1994-03-15 Basf Corporation Semi-continuous depolymerization of nylon 6 polymer
US5498667A (en) * 1993-03-25 1996-03-12 Monsanto Company Thermoplastic composition and method for producing thermoplastic composition by melt blending carpet
US5294384A (en) * 1993-03-25 1994-03-15 Monsanto Company Thermoplastic composition and method for producing thermoplastic composition by melt blending carpet
US5310905A (en) * 1993-04-14 1994-05-10 E. I. Du Pont De Nemours And Company Conversion of nylon 6 and/or nylon 6,6 to monomers
EP0627417B1 (en) * 1993-06-04 1999-08-18 Dsm N.V. Reclaiming epsilon-caprolactam from carpet waste
DE4421239A1 (en) * 1993-06-17 1994-12-22 Inventa Ag Process for the recycling of high-molecular-weight nylon 6, and repolymer prepared by this process
EP0719301B1 (en) * 1993-08-30 2001-06-20 Masland Industries, Inc. Recycling of carpet scrap
US5458740A (en) * 1994-03-04 1995-10-17 Basf Corporation Process for the purification of crude caprolactam
DE4407222A1 (en) * 1994-03-04 1995-09-07 Basf Ag Process for the recovery of caprolactam from oligo and / or polymers of caprolactam
US5457197A (en) * 1994-04-08 1995-10-10 Alliedsignal Inc. Monomer recovery from multi-component materials
DE4416466A1 (en) * 1994-05-10 1995-11-16 Zimmer Ag Separation method for carpets
US6379489B1 (en) * 1994-09-26 2002-04-30 Monsanto Company Carpet reclamation process
US5916410A (en) * 1994-09-29 1999-06-29 Monsanto Company Carpet reclamation process
US5565590A (en) * 1994-11-07 1996-10-15 Eastman Chemical Company Process for recycling amino-carboxylic acid waste materials into amido-carboxylic acids
US5535945A (en) * 1995-02-27 1996-07-16 Basf Corportion Carpet recycling process and system
US5849804A (en) * 1995-06-29 1998-12-15 Basf Corporation Recovery of polyamides from composite articles
US5656757A (en) * 1995-08-10 1997-08-12 Alliedsignal Inc. Monomer recovery from multi-component materials
US5681952A (en) * 1995-12-08 1997-10-28 Alliedsignal Inc. Process for depolymerizing nylon-containing waste to form caprolactam
US5948908A (en) * 1996-03-18 1999-09-07 Alliedsignal Inc. Process for depolymerizing polycaprolactam processing waste to form caprolactam
US5859071A (en) * 1996-04-15 1999-01-12 Lear Corporation Recycling of carpet scrap
BR9810634A (en) * 1997-06-27 2001-11-27 Procter & Gamble Structured liquid detergent compositions, containing fatty acid, non-aqueous
US5990306A (en) * 1997-09-03 1999-11-23 Alliedsignal Inc. Process for the purification of caprolactam obtained from the depolymerization of polyamide-containing carpet
DE19753377B4 (en) * 1997-12-02 2008-07-10 Lurgi Zimmer Gmbh Process for the preparation of ε-caprolactam from extract water of PA-6 synthesis
US6667360B1 (en) 1999-06-10 2003-12-23 Rensselaer Polytechnic Institute Nanoparticle-filled polymers
US6241168B1 (en) 1999-06-10 2001-06-05 Lear Corporation Recycling of carpet scrap and compositions employing ultralow density polyethylene (ULDPE)
EP1104753A1 (en) * 1999-12-03 2001-06-06 Dsm N.V. Process for recovering monomeric units of a nylon from whole carpet
US7659320B2 (en) * 2000-11-01 2010-02-09 Interface, Inc. Method for extracting nylon from waste materials
US7045590B2 (en) * 2001-02-14 2006-05-16 Mohawk Brands, Inc. Use of waste carpet as filler
US6786988B1 (en) 2001-02-14 2004-09-07 Mohawk Brands Inc. Use of waste carpet as filler
US7550516B2 (en) 2001-05-10 2009-06-23 Interface, Inc. Method for extracting nylon from waste materials
US6814826B1 (en) 2003-03-03 2004-11-09 Mohawk Brands, Inc. Use of waste carpet as backing filler for floor coverings
CA2527410A1 (en) * 2003-05-27 2004-12-09 Environmental Technologies Capital Partners, Llc Liquid fertilizer incorporating biosolids and high concentrations of ammonium
US7887726B1 (en) 2006-11-24 2011-02-15 Novana, Inc. Self-reinforced composite made of recycled materials and process of making the same
US8110131B1 (en) 2006-12-06 2012-02-07 Dell Orco Sergio Carpet reclamation system
US8017662B2 (en) * 2007-09-20 2011-09-13 Universal Fibers, Inc. Method of separation and cleaning of post consumer carpet face yarn from carpet backing and yarn product produced therefrom
US20090300982A1 (en) * 2008-06-05 2009-12-10 Chemical Products Corporation Calcium carbonate soil amendment and industrial filler derived from carpet backing
CA2675906C (en) 2008-08-20 2014-02-04 Mohawk Carpet, Llc Filler recovery processes
CH700545A2 (en) * 2009-03-05 2010-09-15 List Holding Ag Method and device for the continuous or batchwise depolymerization of polycaprolactam.
US8113448B2 (en) 2009-04-22 2012-02-14 Keating Joseph Z Methods of recycling carpet components and carpet components formed thereform
US8360348B2 (en) 2010-08-12 2013-01-29 Frank Levy Method and apparatus for recycling carpet
US8870104B2 (en) 2011-01-13 2014-10-28 Frank Levy Method for separating carpet fibers
US8864057B2 (en) 2011-11-04 2014-10-21 Shaw Industries Group, Inc. Processes for recycling carpet and products of such processes
US9193865B2 (en) 2012-09-27 2015-11-24 E I Du Pont De Nemours And Company Polyamides having improved anti-delamination
US9023903B2 (en) 2012-09-27 2015-05-05 E I Du Pont De Nemours And Company Reinforced polyamides having improved anti-delamination
US9109114B2 (en) 2012-09-27 2015-08-18 E I Du Pont De Nemours And Company Polyamides having improved anti-delamination
DE102012220498A1 (en) * 2012-11-09 2014-05-15 Aquafil Engineering Gmbh Process and device for the treatment of polymers
US20140272262A1 (en) 2013-03-12 2014-09-18 Milliken & Company Recyclable Single Polymer Floorcovering Article
US9221197B2 (en) 2013-07-16 2015-12-29 Hall Patents, LLC Methods and systems for flooring material recycling
FR3101351B1 (en) * 2019-09-26 2022-08-19 Arkema France Process for the joint recycling of composite articles based on a thermoplastic polymer matrix
WO2023187045A1 (en) * 2022-03-30 2023-10-05 Basf Se Process for hydrolytically depolymerizing a polyamide

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Publication number Priority date Publication date Assignee Title
BE518416A (en) *
US2343174A (en) * 1940-08-02 1944-02-29 Du Pont Treatment for polyamides
US3988406A (en) * 1972-04-13 1976-10-26 Asahi Kasei Kogyo Kabushiki Kaisha Method of providing a fibrous thermoplastic resin for depolymerization thereof
US4028159A (en) * 1974-06-19 1977-06-07 Champion International Corporation Resin reclamation in carpet manufacture
DE2440243C2 (en) * 1974-08-22 1985-05-02 Dr. Illing GmbH & Co KG Makromolekulare Chemie, 6114 Groß-Umstadt Process for the production of caprolactam from polycaprolactam
DE2442387C3 (en) * 1974-09-04 1981-09-10 Bayer Ag, 5090 Leverkusen Process for the continuous hydrolytic breakdown of hydrolyzable plastic waste
DE2703461C2 (en) * 1977-01-28 1985-01-10 Davy McKee AG, 6000 Frankfurt Stop unit for the pre-compression of shredded, voluminous polymer waste
US4107160A (en) * 1977-08-24 1978-08-15 Zimmer Aktiengesellschaft Continuous process for the recovery of caprolactam
US4311642A (en) * 1980-09-17 1982-01-19 Allied Corporation Recovery of caprolactam from nylon 6 oligomers

Also Published As

Publication number Publication date
DE522235T1 (en) 1993-06-09
DE69230960D1 (en) 2000-05-31
DE69230960T2 (en) 2000-08-17
EP0522235A1 (en) 1993-01-13
CA2064658C (en) 1997-07-01
US5169870A (en) 1992-12-08
JPH05117441A (en) 1993-05-14
EP0522235B1 (en) 2000-04-26

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKEC Expiry (correction)

Effective date: 20121202