A PROCESS FOR THE PURIFICATION OF CAPROLACTAM OBTAINED FROM THE DEPOLYMERIZATION OF POLYAMIDE-CONTAINING CARPET

A PROCESS FOR THE PURIFICATION OF CAPROLACTAM OBTAINED FROM THE DEPOLYMERIZATION OF POLYAMIDE-CONTAINING CARPET

The present invention provides a process for the preparation of purified caprolactam comprising the steps of: (a) depolymerizing polyamide-containing carpet in the presence of steam to obtain crude caprolactam and steam; (b) removing substantially all of said water from said crude caprolactam and st...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: JENCZEWSKI, THEODORE JOHN, CRESCENTINI, LAMBERTO, MAYER, RICHARD EUGENE
Format: Patent
Sprache:eng ; fre
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
container_end_page
container_issue
container_start_page
container_title
container_volume
creator JENCZEWSKI, THEODORE JOHN
CRESCENTINI, LAMBERTO
MAYER, RICHARD EUGENE
description The present invention provides a process for the preparation of purified caprolactam comprising the steps of: (a) depolymerizing polyamide-containing carpet in the presence of steam to obtain crude caprolactam and steam; (b) removing substantially all of said water from said crude caprolactam and steam; (c) distilling the resulting concentrated crude caprolactam at a pressure of less than about 8 mmHg and a temperature from about 110 .degree.C to about 145 .degree.C so as to form overheads and bottoms of the caprolactam; and (d) crystallizing the caprolactam overheads to obtain caprolactam crystals and mother liquor. The resulting purified caprolactam may then be used to make polycaprolactam which may then be used in engineered materials or spun into fiber.
format Patent
fullrecord <record><control><sourceid>epo_EVB</sourceid><recordid>TN_cdi_epo_espacenet_CA2302787C</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>CA2302787C</sourcerecordid><originalsourceid>FETCH-epo_espacenet_CA2302787C3</originalsourceid><addsrcrecordid>eNqFjDEKwkAQRdNYiHoG5wIBSYrYjpNZs5DdWTabQpsQZK3EBOL9MRGxtfrweO-vkwHBeSFuGlDiIVQMrvVaacKgxYIoIJyNGimgATkF1JZLUF7Mxy7ZSX0x7PX1VywEjS45JbFLoO15vvGOwzZZ3fvHFHff3SR7xYGqNI5DF6exv8VnfHWEWX7IimNB-X_jDcOkNsA</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>A PROCESS FOR THE PURIFICATION OF CAPROLACTAM OBTAINED FROM THE DEPOLYMERIZATION OF POLYAMIDE-CONTAINING CARPET</title><source>esp@cenet</source><creator>JENCZEWSKI, THEODORE JOHN ; CRESCENTINI, LAMBERTO ; MAYER, RICHARD EUGENE</creator><creatorcontrib>JENCZEWSKI, THEODORE JOHN ; CRESCENTINI, LAMBERTO ; MAYER, RICHARD EUGENE</creatorcontrib><description>The present invention provides a process for the preparation of purified caprolactam comprising the steps of: (a) depolymerizing polyamide-containing carpet in the presence of steam to obtain crude caprolactam and steam; (b) removing substantially all of said water from said crude caprolactam and steam; (c) distilling the resulting concentrated crude caprolactam at a pressure of less than about 8 mmHg and a temperature from about 110 .degree.C to about 145 .degree.C so as to form overheads and bottoms of the caprolactam; and (d) crystallizing the caprolactam overheads to obtain caprolactam crystals and mother liquor. The resulting purified caprolactam may then be used to make polycaprolactam which may then be used in engineered materials or spun into fiber.</description><language>eng ; fre</language><subject>ACYCLIC OR CARBOCYCLIC COMPOUNDS ; CHEMISTRY ; HETEROCYCLIC COMPOUNDS ; METALLURGY ; ORGANIC CHEMISTRY</subject><creationdate>2008</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=20081014&amp;DB=EPODOC&amp;CC=CA&amp;NR=2302787C$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=20081014&amp;DB=EPODOC&amp;CC=CA&amp;NR=2302787C$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>JENCZEWSKI, THEODORE JOHN</creatorcontrib><creatorcontrib>CRESCENTINI, LAMBERTO</creatorcontrib><creatorcontrib>MAYER, RICHARD EUGENE</creatorcontrib><title>A PROCESS FOR THE PURIFICATION OF CAPROLACTAM OBTAINED FROM THE DEPOLYMERIZATION OF POLYAMIDE-CONTAINING CARPET</title><description>The present invention provides a process for the preparation of purified caprolactam comprising the steps of: (a) depolymerizing polyamide-containing carpet in the presence of steam to obtain crude caprolactam and steam; (b) removing substantially all of said water from said crude caprolactam and steam; (c) distilling the resulting concentrated crude caprolactam at a pressure of less than about 8 mmHg and a temperature from about 110 .degree.C to about 145 .degree.C so as to form overheads and bottoms of the caprolactam; and (d) crystallizing the caprolactam overheads to obtain caprolactam crystals and mother liquor. The resulting purified caprolactam may then be used to make polycaprolactam which may then be used in engineered materials or spun into fiber.</description><subject>ACYCLIC OR CARBOCYCLIC COMPOUNDS</subject><subject>CHEMISTRY</subject><subject>HETEROCYCLIC COMPOUNDS</subject><subject>METALLURGY</subject><subject>ORGANIC CHEMISTRY</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2008</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNqFjDEKwkAQRdNYiHoG5wIBSYrYjpNZs5DdWTabQpsQZK3EBOL9MRGxtfrweO-vkwHBeSFuGlDiIVQMrvVaacKgxYIoIJyNGimgATkF1JZLUF7Mxy7ZSX0x7PX1VywEjS45JbFLoO15vvGOwzZZ3fvHFHff3SR7xYGqNI5DF6exv8VnfHWEWX7IimNB-X_jDcOkNsA</recordid><startdate>20081014</startdate><enddate>20081014</enddate><creator>JENCZEWSKI, THEODORE JOHN</creator><creator>CRESCENTINI, LAMBERTO</creator><creator>MAYER, RICHARD EUGENE</creator><scope>EVB</scope></search><sort><creationdate>20081014</creationdate><title>A PROCESS FOR THE PURIFICATION OF CAPROLACTAM OBTAINED FROM THE DEPOLYMERIZATION OF POLYAMIDE-CONTAINING CARPET</title><author>JENCZEWSKI, THEODORE JOHN ; CRESCENTINI, LAMBERTO ; MAYER, RICHARD EUGENE</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_CA2302787C3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre</language><creationdate>2008</creationdate><topic>ACYCLIC OR CARBOCYCLIC COMPOUNDS</topic><topic>CHEMISTRY</topic><topic>HETEROCYCLIC COMPOUNDS</topic><topic>METALLURGY</topic><topic>ORGANIC CHEMISTRY</topic><toplevel>online_resources</toplevel><creatorcontrib>JENCZEWSKI, THEODORE JOHN</creatorcontrib><creatorcontrib>CRESCENTINI, LAMBERTO</creatorcontrib><creatorcontrib>MAYER, RICHARD EUGENE</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>JENCZEWSKI, THEODORE JOHN</au><au>CRESCENTINI, LAMBERTO</au><au>MAYER, RICHARD EUGENE</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>A PROCESS FOR THE PURIFICATION OF CAPROLACTAM OBTAINED FROM THE DEPOLYMERIZATION OF POLYAMIDE-CONTAINING CARPET</title><date>2008-10-14</date><risdate>2008</risdate><abstract>The present invention provides a process for the preparation of purified caprolactam comprising the steps of: (a) depolymerizing polyamide-containing carpet in the presence of steam to obtain crude caprolactam and steam; (b) removing substantially all of said water from said crude caprolactam and steam; (c) distilling the resulting concentrated crude caprolactam at a pressure of less than about 8 mmHg and a temperature from about 110 .degree.C to about 145 .degree.C so as to form overheads and bottoms of the caprolactam; and (d) crystallizing the caprolactam overheads to obtain caprolactam crystals and mother liquor. The resulting purified caprolactam may then be used to make polycaprolactam which may then be used in engineered materials or spun into fiber.</abstract><oa>free_for_read</oa></addata></record>
fulltext fulltext_linktorsrc
identifier
ispartof
issn
language eng ; fre
recordid cdi_epo_espacenet_CA2302787C
source esp@cenet
subjects ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
title A PROCESS FOR THE PURIFICATION OF CAPROLACTAM OBTAINED FROM THE DEPOLYMERIZATION OF POLYAMIDE-CONTAINING CARPET
url https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-02-11T20%3A43%3A37IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-epo_EVB&rft_val_fmt=info:ofi/fmt:kev:mtx:patent&rft.genre=patent&rft.au=JENCZEWSKI,%20THEODORE%20JOHN&rft.date=2008-10-14&rft_id=info:doi/&rft_dat=%3Cepo_EVB%3ECA2302787C%3C/epo_EVB%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true