Process for the production of diurethanes and their use for the
production of diisocyanates
    3.
    发明授权
    Process for the production of diurethanes and their use for the production of diisocyanates 失效
    用于生产二氨基甲酸酯的方法及其用于生产二异氰酸酯的方法

    公开(公告)号:US5744633A

    公开(公告)日:1998-04-28

    申请号:US348704

    申请日:1994-12-02

    CPC分类号: C07C269/04

    摘要: A new process for the production of high purity (cyclo)aliphatic diurethanes from (cyclo)aliphatic diamines, alcohols and urea in a multistep reaction in which (1) urea is reacted with alcohol with elimination of ammonia, (2) diamine is then introduced into the reaction mixture, optionally in the form of a solution in alcohol, and reacted with continuous release of ammonia and (3) the reaction mixture is freed from volatile components by distillation. The diurethanes produced by this process are useful as starting materials for the production of the corresponding diisocyanates by thermal urethane cleavage.

    摘要翻译: 然后引入(1)尿素与醇与氨反应脱除(2)二胺时,在多步反应中从(环)脂族二胺,醇和尿素生产高纯度(环)脂族二氨基甲酸酯的新方法 进入反应混合物中,任选地呈醇的溶液形式,并与氨的连续释放反应,和(3)通过蒸馏除去挥发性组分。 通过该方法制备的二氨基甲酸酯可用作通过热氨基甲酸酯切割生产相应的二异氰酸酯的起始原料。

    Process for the production of
1-amino-1-methyl-3(4)-aminomethylcyclohexane
    5.
    发明授权
    Process for the production of 1-amino-1-methyl-3(4)-aminomethylcyclohexane 失效
    1-氨基-1-甲基-3(4) - 氨基甲基环己烷的制备方法

    公开(公告)号:US5905170A

    公开(公告)日:1999-05-18

    申请号:US38636

    申请日:1998-03-11

    摘要: The present invention relates to a process for the production of 1-amino-1-methyl-3(4)-aminomethylcyclohexane bya) simultaneously reacting 4(5)-aminomethyl-1-methylcyclohexene (CMA), hydrocyanic acid and aqueous sulphuric acid at temperatures of 60.degree. C. to 120.degree. C., preferably 80.degree. C. to 120.degree. C. to form 1-formamido-1-methyl-3(4)-aminomethylcyclohexane (FMA) in a first stage,b) adding water and hydrolyzing 1-formamido-1-methyl-3 (4)-aminomethylcyclohexane (FMA) and unreacted hydrocyanic acid in a second stage andc) adding a base and isolating 1-amino-1-methyl-3 (4)-aminomethylcyclohexane (AMCA) by extraction from the reaction mixture obtained in the second stage of the reaction, optionally after removing of formic acid.

    摘要翻译: 本发明涉及通过以下方法生产1-氨基-1-甲基-3(4) - 氨基甲基环己烷的方法:a)同时使4(5) - 氨基甲基-1-甲基环己烯(CMA),氢氰酸和硫酸水溶液 在60℃至120℃,优选80℃至120℃的温度下,在第一阶段中形成1-甲酰胺基-1-甲基-3(4) - 氨基甲基环己烷(FMA),b)加入 水并在第二阶段水解1-甲酰氨基-1-甲基-3(4) - 氨基甲基环己烷(FMA)和未反应的氢氰酸,和c)加入碱并分离1-氨基-1-甲基-3(4) - 氨基甲基环己烷 (AMCA),通过从反应第二阶段获得的反应混合物中提取,任选地在除去甲酸之后。

    Process for the preparation of 1-amino-1-methyl-3(4)-aminomethyl
cyclohexane
    7.
    发明授权
    Process for the preparation of 1-amino-1-methyl-3(4)-aminomethyl cyclohexane 失效
    1-氨基-1-甲基-3(4) - 氨基甲基环己烷的制备方法

    公开(公告)号:US5900507A

    公开(公告)日:1999-05-04

    申请号:US38331

    申请日:1998-03-11

    摘要: The present invention relates to a process for the preparation of 1-amino-1-methyl-3(4)-aminomethyl cyclohexane (AMCA) bya) catalytically hydrogenating 1-formamido-1-methyl-3(4)-cyano cyclohexane (FMC) in a first reaction stage to form 1-formamido-1-methyl-3(4)-aminomethyl cyclohexane (FMA), 1-amino-1-methyl-3(4)-formamidomethyl cyclohexane (AMF), 1-formamido-1-methyl-3(4)-formamidomethyl cyclohexane (FMF) and/or AMCA, andb) reacting FMA, AMF and/or FMF in a second reaction stage with an alkaline compound to from AMCA and a formic acid derivative, andc) separating the reaction mixture obtained in step b) into components by fractional distillation and/or by crystallization and filtration.The present invention is also relates to carrying the hydrogenation reaction of step a) in the presence of a formulating agent to form 1-formamido-1-methyl-3(4)-formamidomethyl cyclohexane (FMF).Finally, the present invention relates to the intermediate products 1-formamido-1-methyl-3(4)-aminomethyl cyclohexane (FMA) and 1-formamido-1-methyl-3(4)-formamidomethyl cyclohexane (FMF).

    摘要翻译: 本发明涉及通过以下方法制备1-氨基-1-甲基-3(4) - 氨基甲基环己烷(AMCA)的方法:a)催化氢化1-甲酰氨基-1-甲基-3(4) - 氰基环己烷 FMA),1-氨基-1-甲基-3(4) - 氨基甲基环己烷(FMA),1-氨基-1-甲基-3(4) - 甲酰胺基甲基环己烷(AMF),1-甲酰胺 使甲基-3(4) - 甲酰胺基甲基环己烷(FMF)和/或AMCA,和b)使第二反应阶段中的FMA,AMF和/或FMF与碱性化合物与AMCA和甲酸衍生物反应,以及 c)通过分步和/或通过结晶和过滤将步骤b)中获得的反应混合物分离成组分。 本发明还涉及在配制剂的存在下进行步骤a)的氢化反应以形成1-甲酰氨基-1-甲基-3(4) - 甲酰胺基甲基环己烷(FMF)。 最后,本发明涉及中间产物1-甲酰氨基-1-甲基-3(4) - 氨基甲基环己烷(FMA)和1-甲酰氨基-1-甲基-3(4) - 甲酰胺基甲基环己烷(FMF)。

    Process for removing by-products from diurethanes
    8.
    发明授权
    Process for removing by-products from diurethanes 失效
    从二氨基甲酸酯中除去副产物的方法

    公开(公告)号:US5646328A

    公开(公告)日:1997-07-08

    申请号:US667893

    申请日:1996-06-20

    CPC分类号: C07C269/08

    摘要: Low-boiling by-products are removed from diurethanes prepared by a phosgene-free process by carrier vapor distillation using alcohol vapor, preferably the vapor of the basic alcohol found in the diurethane, as the carrier vapor. The diurethanes freed of low-boiling by-products in this manner may be thermally decomposed to produce diisocyanates.

    摘要翻译: 作为载体蒸气,使用乙醇蒸气(优选二氨基甲酸乙酯中发现的碱性醇的蒸气)作为载体蒸气,通过载气蒸气蒸馏由无光气的方法制备的低沸点副产物被除去。 以这种方式排出低沸点副产物的二氨基甲酸酯可以被热分解以产生二异氰酸酯。