PROCESS FOR PREPARING 4-AMINODIPHENYLAMINES
A process for preparing an optionally substituted 4-aminodiphenylamine comprising reacting an optionally substituted aniline and an optionally substituted nitrobenzene in the presence of water and a base while controlli ng the water content so as to ensure a molar ratio of water to the base charged...
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| creator | GENETTI, RALPH ALBERT LAMBERS, EDWARD ALBERT VAN HENGSTUM, ANTONIUS JOHANNES RAINS, ROGER KERANEN |
| description | A process for preparing an optionally substituted 4-aminodiphenylamine comprising reacting an optionally substituted aniline and an optionally substituted nitrobenzene in the presence of water and a base while controlli ng the water content so as to ensure a molar ratio of water to the base charged of not less than about 4:1 at the start of the coupling reaction and not les s than about 0.6:1 at the end of the coupling reaction to produce 4- nitrodiphenylamine and/or 4-nitrosodiphenylamine and/or salts thereof. The coupling reaction is followed by a hydrogenation reaction where the coupling reaction product is hydrogenated in the presence of a hydrogenation catalyst and added water so as to ensure a molar ratio of total water to base of at least about 4:1 at the end of hydrogenation. Aqueous and organic phases are obtained and the optionally substituted 4-aminodiphenylamine recovered from the organic phase. |
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The coupling reaction is followed by a hydrogenation reaction where the coupling reaction product is hydrogenated in the presence of a hydrogenation catalyst and added water so as to ensure a molar ratio of total water to base of at least about 4:1 at the end of hydrogenation. 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The coupling reaction is followed by a hydrogenation reaction where the coupling reaction product is hydrogenated in the presence of a hydrogenation catalyst and added water so as to ensure a molar ratio of total water to base of at least about 4:1 at the end of hydrogenation. Aqueous and organic phases are obtained and the optionally substituted 4-aminodiphenylamine recovered from the organic phase.</description><subject>ACYCLIC OR CARBOCYCLIC COMPOUNDS</subject><subject>APPARATUS THEREFOR</subject><subject>CHEMISTRY</subject><subject>GENERAL METHODS OF ORGANIC CHEMISTRY</subject><subject>METALLURGY</subject><subject>ORGANIC CHEMISTRY</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1999</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZNAOCPJ3dg0OVnDzD1IICHINcAzy9HNXMNF19PX083fxDPBw9Yv0AXFcg3kYWNMSc4pTeaE0N4OCm2uIs4duakF-fGpxQWJyal5qSbyzo5GxsZGxuZGjoTERSgA4ZySB</recordid><startdate>19991125</startdate><enddate>19991125</enddate><creator>GENETTI, RALPH ALBERT</creator><creator>LAMBERS, EDWARD ALBERT</creator><creator>VAN HENGSTUM, ANTONIUS JOHANNES</creator><creator>RAINS, ROGER KERANEN</creator><scope>EVB</scope></search><sort><creationdate>19991125</creationdate><title>PROCESS FOR PREPARING 4-AMINODIPHENYLAMINES</title><author>GENETTI, RALPH ALBERT ; LAMBERS, EDWARD ALBERT ; VAN HENGSTUM, ANTONIUS JOHANNES ; RAINS, ROGER KERANEN</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_CA2332372A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre</language><creationdate>1999</creationdate><topic>ACYCLIC OR CARBOCYCLIC COMPOUNDS</topic><topic>APPARATUS THEREFOR</topic><topic>CHEMISTRY</topic><topic>GENERAL METHODS OF ORGANIC CHEMISTRY</topic><topic>METALLURGY</topic><topic>ORGANIC CHEMISTRY</topic><toplevel>online_resources</toplevel><creatorcontrib>GENETTI, RALPH ALBERT</creatorcontrib><creatorcontrib>LAMBERS, EDWARD ALBERT</creatorcontrib><creatorcontrib>VAN HENGSTUM, ANTONIUS JOHANNES</creatorcontrib><creatorcontrib>RAINS, ROGER KERANEN</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>GENETTI, RALPH ALBERT</au><au>LAMBERS, EDWARD ALBERT</au><au>VAN HENGSTUM, ANTONIUS JOHANNES</au><au>RAINS, ROGER KERANEN</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>PROCESS FOR PREPARING 4-AMINODIPHENYLAMINES</title><date>1999-11-25</date><risdate>1999</risdate><abstract>A process for preparing an optionally substituted 4-aminodiphenylamine comprising reacting an optionally substituted aniline and an optionally substituted nitrobenzene in the presence of water and a base while controlli ng the water content so as to ensure a molar ratio of water to the base charged of not less than about 4:1 at the start of the coupling reaction and not les s than about 0.6:1 at the end of the coupling reaction to produce 4- nitrodiphenylamine and/or 4-nitrosodiphenylamine and/or salts thereof. The coupling reaction is followed by a hydrogenation reaction where the coupling reaction product is hydrogenated in the presence of a hydrogenation catalyst and added water so as to ensure a molar ratio of total water to base of at least about 4:1 at the end of hydrogenation. Aqueous and organic phases are obtained and the optionally substituted 4-aminodiphenylamine recovered from the organic phase.</abstract><edition>6</edition><oa>free_for_read</oa></addata></record> |
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| subjects | ACYCLIC OR CARBOCYCLIC COMPOUNDS APPARATUS THEREFOR CHEMISTRY GENERAL METHODS OF ORGANIC CHEMISTRY METALLURGY ORGANIC CHEMISTRY |
| title | PROCESS FOR PREPARING 4-AMINODIPHENYLAMINES |
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