PROCESS FOR PURIFYING MESO-LACTIDE

PROCESS FOR PURIFYING MESO-LACTIDE

A process for purifying meso-lactide including purifying meso-lactide, wherein the free acid content is at least 30 meq/kg including at least one step of subjecting a feed including at least 75 wt. % meso-lactide to solvent crystallisation followed by product meso-lactide recovery, wherein the solve...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: GOBIUS DU SART, Gerrit, DE VRIES, Johannes Jeichienus, DE LANG, Wilko
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
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 GOBIUS DU SART, Gerrit
DE VRIES, Johannes Jeichienus
DE LANG, Wilko
description A process for purifying meso-lactide including purifying meso-lactide, wherein the free acid content is at least 30 meq/kg including at least one step of subjecting a feed including at least 75 wt. % meso-lactide to solvent crystallisation followed by product meso-lactide recovery, wherein the solvent crystallisation is carried in a solvent including at least 70 wt. % of at least one compound selected from the group of ketones of the formula R1-C(═O)-R2, the solvent amounts to 5-50 wt. % of feed and solvent total, the solvent crystallisation conditions being at least 15% of the meso-lactide in the feed crystallises in solid form, wherein the solid meso lactide recovered from solvent crystallisation followed by recovery of product meso-lactide has a free acid content of at most 20 meq/kg. The process yields meso-lactide in high purity and high yield in an efficient manner, with minimum formation of lactic and linear lactic acid oligomers.
format Patent
fullrecord <record><control><sourceid>epo_EVB</sourceid><recordid>TN_cdi_epo_espacenet_EP4399205A1</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>EP4399205A1</sourcerecordid><originalsourceid>FETCH-epo_espacenet_EP4399205A13</originalsourceid><addsrcrecordid>eNrjZFAKCPJ3dg0OVnDzD1IICA3ydIv09HNX8HUN9tf1cXQO8XRx5WFgTUvMKU7lhdLcDApuriHOHrqpBfnxqcUFicmpeakl8a4BJsaWlkYGpo6GxkQoAQACIyIr</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>PROCESS FOR PURIFYING MESO-LACTIDE</title><source>esp@cenet</source><creator>GOBIUS DU SART, Gerrit ; DE VRIES, Johannes Jeichienus ; DE LANG, Wilko</creator><creatorcontrib>GOBIUS DU SART, Gerrit ; DE VRIES, Johannes Jeichienus ; DE LANG, Wilko</creatorcontrib><description>A process for purifying meso-lactide including purifying meso-lactide, wherein the free acid content is at least 30 meq/kg including at least one step of subjecting a feed including at least 75 wt. % meso-lactide to solvent crystallisation followed by product meso-lactide recovery, wherein the solvent crystallisation is carried in a solvent including at least 70 wt. % of at least one compound selected from the group of ketones of the formula R1-C(═O)-R2, the solvent amounts to 5-50 wt. % of feed and solvent total, the solvent crystallisation conditions being at least 15% of the meso-lactide in the feed crystallises in solid form, wherein the solid meso lactide recovered from solvent crystallisation followed by recovery of product meso-lactide has a free acid content of at most 20 meq/kg. The process yields meso-lactide in high purity and high yield in an efficient manner, with minimum formation of lactic and linear lactic acid oligomers.</description><language>eng ; fre ; ger</language><subject>CHEMISTRY ; HETEROCYCLIC COMPOUNDS ; METALLURGY ; ORGANIC CHEMISTRY</subject><creationdate>2024</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=20240717&amp;DB=EPODOC&amp;CC=EP&amp;NR=4399205A1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25562,76317</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=20240717&amp;DB=EPODOC&amp;CC=EP&amp;NR=4399205A1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>GOBIUS DU SART, Gerrit</creatorcontrib><creatorcontrib>DE VRIES, Johannes Jeichienus</creatorcontrib><creatorcontrib>DE LANG, Wilko</creatorcontrib><title>PROCESS FOR PURIFYING MESO-LACTIDE</title><description>A process for purifying meso-lactide including purifying meso-lactide, wherein the free acid content is at least 30 meq/kg including at least one step of subjecting a feed including at least 75 wt. % meso-lactide to solvent crystallisation followed by product meso-lactide recovery, wherein the solvent crystallisation is carried in a solvent including at least 70 wt. % of at least one compound selected from the group of ketones of the formula R1-C(═O)-R2, the solvent amounts to 5-50 wt. % of feed and solvent total, the solvent crystallisation conditions being at least 15% of the meso-lactide in the feed crystallises in solid form, wherein the solid meso lactide recovered from solvent crystallisation followed by recovery of product meso-lactide has a free acid content of at most 20 meq/kg. The process yields meso-lactide in high purity and high yield in an efficient manner, with minimum formation of lactic and linear lactic acid oligomers.</description><subject>CHEMISTRY</subject><subject>HETEROCYCLIC COMPOUNDS</subject><subject>METALLURGY</subject><subject>ORGANIC CHEMISTRY</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2024</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZFAKCPJ3dg0OVnDzD1IICA3ydIv09HNX8HUN9tf1cXQO8XRx5WFgTUvMKU7lhdLcDApuriHOHrqpBfnxqcUFicmpeakl8a4BJsaWlkYGpo6GxkQoAQACIyIr</recordid><startdate>20240717</startdate><enddate>20240717</enddate><creator>GOBIUS DU SART, Gerrit</creator><creator>DE VRIES, Johannes Jeichienus</creator><creator>DE LANG, Wilko</creator><scope>EVB</scope></search><sort><creationdate>20240717</creationdate><title>PROCESS FOR PURIFYING MESO-LACTIDE</title><author>GOBIUS DU SART, Gerrit ; DE VRIES, Johannes Jeichienus ; DE LANG, Wilko</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_EP4399205A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre ; ger</language><creationdate>2024</creationdate><topic>CHEMISTRY</topic><topic>HETEROCYCLIC COMPOUNDS</topic><topic>METALLURGY</topic><topic>ORGANIC CHEMISTRY</topic><toplevel>online_resources</toplevel><creatorcontrib>GOBIUS DU SART, Gerrit</creatorcontrib><creatorcontrib>DE VRIES, Johannes Jeichienus</creatorcontrib><creatorcontrib>DE LANG, Wilko</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>GOBIUS DU SART, Gerrit</au><au>DE VRIES, Johannes Jeichienus</au><au>DE LANG, Wilko</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>PROCESS FOR PURIFYING MESO-LACTIDE</title><date>2024-07-17</date><risdate>2024</risdate><abstract>A process for purifying meso-lactide including purifying meso-lactide, wherein the free acid content is at least 30 meq/kg including at least one step of subjecting a feed including at least 75 wt. % meso-lactide to solvent crystallisation followed by product meso-lactide recovery, wherein the solvent crystallisation is carried in a solvent including at least 70 wt. % of at least one compound selected from the group of ketones of the formula R1-C(═O)-R2, the solvent amounts to 5-50 wt. % of feed and solvent total, the solvent crystallisation conditions being at least 15% of the meso-lactide in the feed crystallises in solid form, wherein the solid meso lactide recovered from solvent crystallisation followed by recovery of product meso-lactide has a free acid content of at most 20 meq/kg. The process yields meso-lactide in high purity and high yield in an efficient manner, with minimum formation of lactic and linear lactic acid oligomers.</abstract><oa>free_for_read</oa></addata></record>
fulltext fulltext_linktorsrc
identifier
ispartof
issn
language eng ; fre ; ger
recordid cdi_epo_espacenet_EP4399205A1
source esp@cenet
subjects CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
title PROCESS FOR PURIFYING MESO-LACTIDE
url https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-10T08%3A12%3A46IST&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=GOBIUS%20DU%20SART,%20Gerrit&rft.date=2024-07-17&rft_id=info:doi/&rft_dat=%3Cepo_EVB%3EEP4399205A1%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