A PROCESS FOR THE PREPARATION OF 2-HYDROXY CARBOXYLIC ACIDS
Two step preparation of hydroxy carboxylic acid (e.g. lactic acid) is achieved; Step 1) Carbonylating an enol ester (e.g. vinyl acetate) in presence of a hydroxyl compound (e.g. Methanol) using a palladium catalyst (e.g. PdCl>232
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| creator | CHAUDHARI, RAGHUNATH, VITTHAL TONDE, SUNIL, SOPANA |
| description | Two step preparation of hydroxy carboxylic acid (e.g. lactic acid) is achieved; Step 1) Carbonylating an enol ester (e.g. vinyl acetate) in presence of a hydroxyl compound (e.g. Methanol) using a palladium catalyst (e.g. PdCl>232 |
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L'invention concerne un procédé à deux étapes pour obtenir de l'acide hydroxy-carboxylique (par exemple, acide lactique), consistant 1) à effectuer la carbonylation d'un ester enolique (par exemple, acétate de vinyle) en présence d'un composé hydroxyle (par exemple, méthanol) en utilisant un catalyseur de palladium (par exemple, PdCl2(PPh3)2), un ligand comportant O-, N- et/ou P- et un solvant, à 50-150 DEG C/50-2000 psi pour obtenir un hydroxyester (par exemple méthyle ester de l'acide lactique) et un acétoxyester (par exemple, méthyle ester de l'acide 2-acetoxypropionique), à séparer et à recycler le catalyseur de carbonylation et 2) à hydrolyser les produits issus de l'étape 1) pour obtenir des acides 2-hydroxycarboxyliques (par exemple, acide lactique) en utilisant des catalyseurs acidiques (par exemple, TsOH, aq HCl, résines) à 10-125 DEG C, à séparer et à recycler le catalyseur de l'hydrolyse.</description><edition>7</edition><language>eng ; fre</language><subject>ACYCLIC OR CARBOCYCLIC COMPOUNDS ; CHEMISTRY ; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS ; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC ; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS ; METALLURGY ; ORGANIC CHEMISTRY ; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE</subject><creationdate>2005</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&date=20050721&DB=EPODOC&CC=WO&NR=2005066109A1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25563,76418</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20050721&DB=EPODOC&CC=WO&NR=2005066109A1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>CHAUDHARI, RAGHUNATH, VITTHAL</creatorcontrib><creatorcontrib>TONDE, SUNIL, SOPANA</creatorcontrib><title>A PROCESS FOR THE PREPARATION OF 2-HYDROXY CARBOXYLIC ACIDS</title><description>Two step preparation of hydroxy carboxylic acid (e.g. lactic acid) is achieved; Step 1) Carbonylating an enol ester (e.g. vinyl acetate) in presence of a hydroxyl compound (e.g. Methanol) using a palladium catalyst (e.g. PdCl>2<(PPH>3<)>2<), a O-, N- and/or P- containing ligand and a solvent, at 50-150 DEG C/50-2000 psig to yield hydroxy ester (e.g. methyl lactate) and acetoxy ester (e.g. methyl-2-acetoxy propionate), separating and recycling the catalyst for carbonylation; Step 2) hydrolyzing the step 1 products to 2-hydroxy carboxylic acids (e.g. lactic acid) using acid catalysts (e.g. TsOH, aq HCl, resin) at 10-125 DEG C, separating and recycling the catalyst for hydrolysis.
L'invention concerne un procédé à deux étapes pour obtenir de l'acide hydroxy-carboxylique (par exemple, acide lactique), consistant 1) à effectuer la carbonylation d'un ester enolique (par exemple, acétate de vinyle) en présence d'un composé hydroxyle (par exemple, méthanol) en utilisant un catalyseur de palladium (par exemple, PdCl2(PPh3)2), un ligand comportant O-, N- et/ou P- et un solvant, à 50-150 DEG C/50-2000 psi pour obtenir un hydroxyester (par exemple méthyle ester de l'acide lactique) et un acétoxyester (par exemple, méthyle ester de l'acide 2-acetoxypropionique), à séparer et à recycler le catalyseur de carbonylation et 2) à hydrolyser les produits issus de l'étape 1) pour obtenir des acides 2-hydroxycarboxyliques (par exemple, acide lactique) en utilisant des catalyseurs acidiques (par exemple, TsOH, aq HCl, résines) à 10-125 DEG C, à séparer et à recycler le catalyseur de l'hydrolyse.</description><subject>ACYCLIC OR CARBOCYCLIC COMPOUNDS</subject><subject>CHEMISTRY</subject><subject>CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS</subject><subject>GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC</subject><subject>GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS</subject><subject>METALLURGY</subject><subject>ORGANIC CHEMISTRY</subject><subject>TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS</subject><subject>TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2005</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZLB2VAgI8nd2DQ5WcPMPUgjxcAXyXQMcgxxDPP39FPzdFIx0PSJdgvwjIhWcHYOcgLSPp7OCo7OnSzAPA2taYk5xKi-U5mZQdnMNcfbQTS3Ij08tLkhMTs1LLYkP9zcyMDA1MDMzNLB0NDQmThUAYr0p-A</recordid><startdate>20050721</startdate><enddate>20050721</enddate><creator>CHAUDHARI, RAGHUNATH, VITTHAL</creator><creator>TONDE, SUNIL, SOPANA</creator><scope>EVB</scope></search><sort><creationdate>20050721</creationdate><title>A PROCESS FOR THE PREPARATION OF 2-HYDROXY CARBOXYLIC ACIDS</title><author>CHAUDHARI, RAGHUNATH, VITTHAL ; TONDE, SUNIL, SOPANA</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_WO2005066109A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre</language><creationdate>2005</creationdate><topic>ACYCLIC OR CARBOCYCLIC COMPOUNDS</topic><topic>CHEMISTRY</topic><topic>CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS</topic><topic>GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC</topic><topic>GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS</topic><topic>METALLURGY</topic><topic>ORGANIC CHEMISTRY</topic><topic>TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS</topic><topic>TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE</topic><toplevel>online_resources</toplevel><creatorcontrib>CHAUDHARI, RAGHUNATH, VITTHAL</creatorcontrib><creatorcontrib>TONDE, SUNIL, SOPANA</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>CHAUDHARI, RAGHUNATH, VITTHAL</au><au>TONDE, SUNIL, SOPANA</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>A PROCESS FOR THE PREPARATION OF 2-HYDROXY CARBOXYLIC ACIDS</title><date>2005-07-21</date><risdate>2005</risdate><abstract>Two step preparation of hydroxy carboxylic acid (e.g. lactic acid) is achieved; Step 1) Carbonylating an enol ester (e.g. vinyl acetate) in presence of a hydroxyl compound (e.g. Methanol) using a palladium catalyst (e.g. PdCl>2<(PPH>3<)>2<), a O-, N- and/or P- containing ligand and a solvent, at 50-150 DEG C/50-2000 psig to yield hydroxy ester (e.g. methyl lactate) and acetoxy ester (e.g. methyl-2-acetoxy propionate), separating and recycling the catalyst for carbonylation; Step 2) hydrolyzing the step 1 products to 2-hydroxy carboxylic acids (e.g. lactic acid) using acid catalysts (e.g. TsOH, aq HCl, resin) at 10-125 DEG C, separating and recycling the catalyst for hydrolysis.
L'invention concerne un procédé à deux étapes pour obtenir de l'acide hydroxy-carboxylique (par exemple, acide lactique), consistant 1) à effectuer la carbonylation d'un ester enolique (par exemple, acétate de vinyle) en présence d'un composé hydroxyle (par exemple, méthanol) en utilisant un catalyseur de palladium (par exemple, PdCl2(PPh3)2), un ligand comportant O-, N- et/ou P- et un solvant, à 50-150 DEG C/50-2000 psi pour obtenir un hydroxyester (par exemple méthyle ester de l'acide lactique) et un acétoxyester (par exemple, méthyle ester de l'acide 2-acetoxypropionique), à séparer et à recycler le catalyseur de carbonylation et 2) à hydrolyser les produits issus de l'étape 1) pour obtenir des acides 2-hydroxycarboxyliques (par exemple, acide lactique) en utilisant des catalyseurs acidiques (par exemple, TsOH, aq HCl, résines) à 10-125 DEG C, à séparer et à recycler le catalyseur de l'hydrolyse.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
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| subjects | ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY ORGANIC CHEMISTRY TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE |
| title | A PROCESS FOR THE PREPARATION OF 2-HYDROXY CARBOXYLIC ACIDS |
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