PROCESS FOR THE MANUFACTURE OF BENZOIC ACID AND SALTS THEREOF
A process for the manufacture of benzoic acid is described. The process is based on the reaction of toluene in a liquid phase oxidation with an oxygen containing gas in the presence of a phase-transfer catalyst (a), a transitionn metal salt (b) and traces of a polar solvent, such as water, the molar...
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| creator | DAKKA, JIHAD SASSON, YOEL ZORAN, AMIKAM |
| description | A process for the manufacture of benzoic acid is described. The process is based on the reaction of toluene in a liquid phase oxidation with an oxygen containing gas in the presence of a phase-transfer catalyst (a), a transitionn metal salt (b) and traces of a polar solvent, such as water, the molar ratio between (a) and (b) being in the range of between 0.25:1 to 1.5:1. The phase-transfer catalyst is selected from quaternary ammonium and phosphonium salts having a total carbon atoms in the range of 17 to 58, the anion bound thereto being selected from Br, F, Cl, OH, CH3COO or HSO4. The benzoic acid produced is characterized by its very high purity and high conversion reaching generally values of above 95%. |
| format | Patent |
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The process is based on the reaction of toluene in a liquid phase oxidation with an oxygen containing gas in the presence of a phase-transfer catalyst (a), a transitionn metal salt (b) and traces of a polar solvent, such as water, the molar ratio between (a) and (b) being in the range of between 0.25:1 to 1.5:1. The phase-transfer catalyst is selected from quaternary ammonium and phosphonium salts having a total carbon atoms in the range of 17 to 58, the anion bound thereto being selected from Br<->, F<->, Cl<->, OH<->, CH3COO<-> or HSO4<->. 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The process is based on the reaction of toluene in a liquid phase oxidation with an oxygen containing gas in the presence of a phase-transfer catalyst (a), a transitionn metal salt (b) and traces of a polar solvent, such as water, the molar ratio between (a) and (b) being in the range of between 0.25:1 to 1.5:1. The phase-transfer catalyst is selected from quaternary ammonium and phosphonium salts having a total carbon atoms in the range of 17 to 58, the anion bound thereto being selected from Br<->, F<->, Cl<->, OH<->, CH3COO<-> or HSO4<->. The benzoic acid produced is characterized by its very high purity and high conversion reaching generally values of above 95%.]]></description><subject>ACYCLIC OR CARBOCYCLIC COMPOUNDS</subject><subject>APPARATUS THEREFOR</subject><subject>CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY</subject><subject>CHEMISTRY</subject><subject>GENERAL METHODS OF ORGANIC CHEMISTRY</subject><subject>METALLURGY</subject><subject>ORGANIC CHEMISTRY</subject><subject>PERFORMING OPERATIONS</subject><subject>PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL</subject><subject>THEIR RELEVANT APPARATUS</subject><subject>TRANSPORTING</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1992</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZLANCPJ3dg0OVnDzD1II8XBV8HX0C3VzdA4JDXJV8HdTcHL1i_L3dFZwdPZ0UXD0c1EIdvQJCQapDHL1d-NhYE1LzClO5YXS3AwKbq4hzh66qQX58anFBYnJqXmpJfGuAQbGBgaWRoZOhsZEKAEAuJ4pBQ</recordid><startdate>19920527</startdate><enddate>19920527</enddate><creator>DAKKA, JIHAD</creator><creator>SASSON, YOEL</creator><creator>ZORAN, AMIKAM</creator><scope>EVB</scope></search><sort><creationdate>19920527</creationdate><title>PROCESS FOR THE MANUFACTURE OF BENZOIC ACID AND SALTS THEREOF</title><author>DAKKA, JIHAD ; SASSON, YOEL ; ZORAN, AMIKAM</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_EP0300921B13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1992</creationdate><topic>ACYCLIC OR CARBOCYCLIC COMPOUNDS</topic><topic>APPARATUS THEREFOR</topic><topic>CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY</topic><topic>CHEMISTRY</topic><topic>GENERAL METHODS OF ORGANIC CHEMISTRY</topic><topic>METALLURGY</topic><topic>ORGANIC CHEMISTRY</topic><topic>PERFORMING OPERATIONS</topic><topic>PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL</topic><topic>THEIR RELEVANT APPARATUS</topic><topic>TRANSPORTING</topic><toplevel>online_resources</toplevel><creatorcontrib>DAKKA, JIHAD</creatorcontrib><creatorcontrib>SASSON, YOEL</creatorcontrib><creatorcontrib>ZORAN, AMIKAM</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>DAKKA, JIHAD</au><au>SASSON, YOEL</au><au>ZORAN, AMIKAM</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>PROCESS FOR THE MANUFACTURE OF BENZOIC ACID AND SALTS THEREOF</title><date>1992-05-27</date><risdate>1992</risdate><abstract><![CDATA[A process for the manufacture of benzoic acid is described. The process is based on the reaction of toluene in a liquid phase oxidation with an oxygen containing gas in the presence of a phase-transfer catalyst (a), a transitionn metal salt (b) and traces of a polar solvent, such as water, the molar ratio between (a) and (b) being in the range of between 0.25:1 to 1.5:1. The phase-transfer catalyst is selected from quaternary ammonium and phosphonium salts having a total carbon atoms in the range of 17 to 58, the anion bound thereto being selected from Br<->, F<->, Cl<->, OH<->, CH3COO<-> or HSO4<->. The benzoic acid produced is characterized by its very high purity and high conversion reaching generally values of above 95%.]]></abstract><oa>free_for_read</oa></addata></record> |
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| subjects | ACYCLIC OR CARBOCYCLIC COMPOUNDS APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY GENERAL METHODS OF ORGANIC CHEMISTRY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING |
| title | PROCESS FOR THE MANUFACTURE OF BENZOIC ACID AND SALTS THEREOF |
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