The present invention relates to a novel process for preparing alkyl polycarboxylates from an aqueous solution of an ammonium salt of the polycarboxylic acid by reactive distillation, and to a process for hydrogenating the alkyl carboxylates prepared in this way.
[EN] PROCESS FOR PRODUCING N-METHYL SUCCINIMIDE<br/>[FR] PROCEDE DE PRODUCTION DE N-METHYLE SUCCINIMIDE
申请人:BATTELLE MEMORIAL INSTITUTE
公开号:WO2004058708A1
公开(公告)日:2004-07-15
The invention includes methods of processing an initial di-carbonyl compound by conversion to a cyclic compound. The cyclic compound is reacted with an alkyating agent to form a derivative having an alkylated ring nitrogen. The invention encompasses a method of producing an N-alkyl product. Amonia content of a solution is adjusted to produce a ratio of ammonia to di-carboxylate compound of from about 1:1 to about 1.5:1. An alkylating agent is added and the initial compound is alkylated and cyclized. The invention includes methods of making N-methyl pyrrolidinone (NMP). Aqueous ammonia and succinate is introduced into a vessel and ammonia is adjusted to provide a ratio of ammonia to succinate of less than 2:1. A methylating agent is reacted with succinate at a temperature of from greater than 100 °C to about 400 °C to produce N-methyl succinimide which is purified and hydrogenated to form NMP.
[EN] METHOD FOR CONVERSION OF DIAMMONIM SUCCINATE IN FERMENTATION BROTH TO 2-PYRROLIDONE AND N-METHYLPYRROLIDONE<br/>[FR] PROCÉDÉ DE CONVERSION DU SUCCINATE DE DIAMMONIUM PRÉSENT DANS UN BOUILLON DE FERMENTATION EN 2-PYRROLIDONE ET EN N-MÉTHYLPYRROLIDONE
申请人:MYRIANT CORP
公开号:WO2013033649A1
公开(公告)日:2013-03-07
This invention relates to a process for preparing 2-pyrroiidone (also called 2- pyrrolidinone) and N-methylpyrrolidone (also called N-methylpyrrolidinone) from diammonium succinate in fermentation broth. In the first stage of this invention, renewable carbon resources are utilized to produce diammonium succinate through biological fermentation. In the second stage of this present invention, diammonium succinate is converted into 2-pyrroiidone and N-methylpyrrolidone through a two step reaction. Both the steps of the reaction leading to the production of 2-pyrroiidone and N-methylpyrrolidone are carried out in a solvent phase to prevent the loss of succinimide through hydrolysis.
这项发明涉及一种从发酵液中的丙二酸二铵制备2-吡咯酮(也称为2-吡咯啉酮)和N-甲基吡咯酮(
Process for preparing diacid compounds
申请人:RHODIA OPERATIONS
公开号:US20150175515A1
公开(公告)日:2015-06-25
The present invention relates to a process for preparing at least one diacid compound, comprising a step of hydrolysis reaction of at least one imide compound, performed in the absence of catalyst.