Glycolide production process, and glycolic acid oligomer for glycolide production
The invention relates to a glycolide production process wherein a depolymerization reaction system comprising a glycolic acid oligomer or a glycolic acid oligomer and a polar organic solvent is heated to depolymerize the glycolic acid oligomer into glycolide, the resulting glycolide or the glycolide...
Gespeichert in:
| Hauptverfasser: | , |
|---|---|
| Format: | Patent |
| Sprache: | eng |
| 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 | Yamane, Kazuyuki Kawakami, Yukichika |
| description | The invention relates to a glycolide production process wherein a depolymerization reaction system comprising a glycolic acid oligomer or a glycolic acid oligomer and a polar organic solvent is heated to depolymerize the glycolic acid oligomer into glycolide, the resulting glycolide or the glycolide and polar organic solvent are distilled out of the depolymerization reaction system, and the glycolide is recovered from distillates obtained by distillation. The glycolic acid oligomer or the glycolic acid oligomer and polar organic solvent are continuously or intermittently charged into the depolymerization reaction system, thereby carrying out depolymerization reactions continuously or repeatedly. During the depolymerization reactions, a compound having an alcoholic hydroxyl group is permitted to exist at a specific quantitative ratio in the depolymerization reaction system. The invention is also concerned with a glycolic acid oligomer for the production of glycolide, which is obtained by condensation of glycolic acid in the presence of the compound having an alcoholic hydroxyl group. |
| format | Patent |
| fullrecord | <record><control><sourceid>uspatents_EFH</sourceid><recordid>TN_cdi_uspatents_grants_07235673</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>07235673</sourcerecordid><originalsourceid>FETCH-uspatents_grants_072356733</originalsourceid><addsrcrecordid>eNrjZAh0z6lMzs_JTElVKCjKTylNLsnMzwMxk1OLi3UUEvNSFNIhKpIVEpMzUxSArPT83NQihbT8IpgUimYeBta0xJziVF4ozc2g4OYa4uyhW1pckFiSmldSHJ9elAiiDMyNjE3NzI2NiVACAM8NORg</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>Glycolide production process, and glycolic acid oligomer for glycolide production</title><source>USPTO Issued Patents</source><creator>Yamane, Kazuyuki ; Kawakami, Yukichika</creator><creatorcontrib>Yamane, Kazuyuki ; Kawakami, Yukichika ; Kureha Corporation</creatorcontrib><description>The invention relates to a glycolide production process wherein a depolymerization reaction system comprising a glycolic acid oligomer or a glycolic acid oligomer and a polar organic solvent is heated to depolymerize the glycolic acid oligomer into glycolide, the resulting glycolide or the glycolide and polar organic solvent are distilled out of the depolymerization reaction system, and the glycolide is recovered from distillates obtained by distillation. The glycolic acid oligomer or the glycolic acid oligomer and polar organic solvent are continuously or intermittently charged into the depolymerization reaction system, thereby carrying out depolymerization reactions continuously or repeatedly. During the depolymerization reactions, a compound having an alcoholic hydroxyl group is permitted to exist at a specific quantitative ratio in the depolymerization reaction system. The invention is also concerned with a glycolic acid oligomer for the production of glycolide, which is obtained by condensation of glycolic acid in the presence of the compound having an alcoholic hydroxyl group.</description><language>eng</language><creationdate>2007</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7235673$$EPDF$$P50$$Guspatents$$Hfree_for_read</linktopdf><link.rule.ids>230,308,780,802,885,64039</link.rule.ids><linktorsrc>$$Uhttps://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7235673$$EView_record_in_USPTO$$FView_record_in_$$GUSPTO$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>Yamane, Kazuyuki</creatorcontrib><creatorcontrib>Kawakami, Yukichika</creatorcontrib><creatorcontrib>Kureha Corporation</creatorcontrib><title>Glycolide production process, and glycolic acid oligomer for glycolide production</title><description>The invention relates to a glycolide production process wherein a depolymerization reaction system comprising a glycolic acid oligomer or a glycolic acid oligomer and a polar organic solvent is heated to depolymerize the glycolic acid oligomer into glycolide, the resulting glycolide or the glycolide and polar organic solvent are distilled out of the depolymerization reaction system, and the glycolide is recovered from distillates obtained by distillation. The glycolic acid oligomer or the glycolic acid oligomer and polar organic solvent are continuously or intermittently charged into the depolymerization reaction system, thereby carrying out depolymerization reactions continuously or repeatedly. During the depolymerization reactions, a compound having an alcoholic hydroxyl group is permitted to exist at a specific quantitative ratio in the depolymerization reaction system. The invention is also concerned with a glycolic acid oligomer for the production of glycolide, which is obtained by condensation of glycolic acid in the presence of the compound having an alcoholic hydroxyl group.</description><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2007</creationdate><recordtype>patent</recordtype><sourceid>EFH</sourceid><recordid>eNrjZAh0z6lMzs_JTElVKCjKTylNLsnMzwMxk1OLi3UUEvNSFNIhKpIVEpMzUxSArPT83NQihbT8IpgUimYeBta0xJziVF4ozc2g4OYa4uyhW1pckFiSmldSHJ9elAiiDMyNjE3NzI2NiVACAM8NORg</recordid><startdate>20070626</startdate><enddate>20070626</enddate><creator>Yamane, Kazuyuki</creator><creator>Kawakami, Yukichika</creator><scope>EFH</scope></search><sort><creationdate>20070626</creationdate><title>Glycolide production process, and glycolic acid oligomer for glycolide production</title><author>Yamane, Kazuyuki ; Kawakami, Yukichika</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-uspatents_grants_072356733</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2007</creationdate><toplevel>online_resources</toplevel><creatorcontrib>Yamane, Kazuyuki</creatorcontrib><creatorcontrib>Kawakami, Yukichika</creatorcontrib><creatorcontrib>Kureha Corporation</creatorcontrib><collection>USPTO Issued Patents</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Yamane, Kazuyuki</au><au>Kawakami, Yukichika</au><aucorp>Kureha Corporation</aucorp><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Glycolide production process, and glycolic acid oligomer for glycolide production</title><date>2007-06-26</date><risdate>2007</risdate><abstract>The invention relates to a glycolide production process wherein a depolymerization reaction system comprising a glycolic acid oligomer or a glycolic acid oligomer and a polar organic solvent is heated to depolymerize the glycolic acid oligomer into glycolide, the resulting glycolide or the glycolide and polar organic solvent are distilled out of the depolymerization reaction system, and the glycolide is recovered from distillates obtained by distillation. The glycolic acid oligomer or the glycolic acid oligomer and polar organic solvent are continuously or intermittently charged into the depolymerization reaction system, thereby carrying out depolymerization reactions continuously or repeatedly. During the depolymerization reactions, a compound having an alcoholic hydroxyl group is permitted to exist at a specific quantitative ratio in the depolymerization reaction system. The invention is also concerned with a glycolic acid oligomer for the production of glycolide, which is obtained by condensation of glycolic acid in the presence of the compound having an alcoholic hydroxyl group.</abstract><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext_linktorsrc |
| identifier | |
| ispartof | |
| issn | |
| language | eng |
| recordid | cdi_uspatents_grants_07235673 |
| source | USPTO Issued Patents |
| title | Glycolide production process, and glycolic acid oligomer for glycolide production |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-29T04%3A02%3A29IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-uspatents_EFH&rft_val_fmt=info:ofi/fmt:kev:mtx:patent&rft.genre=patent&rft.au=Yamane,%20Kazuyuki&rft.aucorp=Kureha%20Corporation&rft.date=2007-06-26&rft_id=info:doi/&rft_dat=%3Cuspatents_EFH%3E07235673%3C/uspatents_EFH%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 |