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    • 4. 发明授权
    • Recovery of trialkylamines and methyl formate from mixtures obtained in
the preparation of trimethylolalkanes
    • 三氯甲烷制备中获得的混合物中的丙烯酰胺和甲基丙烯酸的回收
    • US5149861A
    • 1992-09-22
    • US664463
    • 1991-03-01
    • Franz MergerPeter HettingerLeopold HupferJuergen PaetschHeribert DeckHeinz AuerErwin Brunner
    • Franz MergerPeter HettingerLeopold HupferJuergen PaetschHeribert DeckHeinz AuerErwin Brunner
    • C07C69/06C07C27/00C07C27/02C07C29/38C07C29/74C07C29/88C07C31/22C07C67/00C07C67/03C07C67/08C07C209/00C07C209/86C07C211/03C07C211/05
    • C07C29/88C07C67/03
    • Trialkylamines and methyl formate are recovered from reaction mixtures obtained in the preparation of trimethylolalkanes by reaction of n-alkanals with from 2.2 to 4.5 moles of formaldehyde in aqueous solution in the presence of from 0.6 to 3 mole of trialkylamine, each quantity based on 1 mole of alkanal, and subsequent hydrogenation in a process wherein the crude reaction mixturea) is heated to from 100.degree. to 200.degree. C., the water present in the reaction mixture is substantially separated off by distillation, together with any excess free trialkylamine, the trialkylamine present in the form of a trialkylammonium formate is freed to form a trimethylolalkane formate, the trialkylamine is distilled off and the trimethylolalkane formate is transesterified with methanol to trimethylolalkane and methyl formate in the presence or absence of a catalytic amount of an alkali metal alkoxide or alkaline earth metal alkoxide, orb) is substantially dewatered, any excess free trialkylamine being removed at the same time, the trialkylamine present in the form of a trialkylammonium formate is separated off by admixing the remaining mixture with methanol and heating the admixture to from 100.degree. to 200.degree. C. to form methyl formate and trialkylamine.
    • 三烷基胺和甲酸甲酯从制备三羟甲基烷烃得到的反应混合物中回收,通过在0.6至3摩尔三烷基胺存在的情况下,正链烷与2.2至4.5摩尔甲醛在水溶液中的反应,每个量基于1摩尔 然后在将粗反应混合物a)加热至100至200℃的过程中随后进行氢化,反应混合物中存在的水通过蒸馏与任何过量的游离三烷基胺基本上分离出来, 以三烷基铵甲酸盐形式存在的三烷基胺可以形成甲酸三羟甲基烷烃,在存在或不存在催化量的碱金属醇盐的条件下,将三烷基胺蒸馏除去,甲醇三甲氧基链烷烃甲酯与甲醇酯交换为三羟甲基烷烃和甲酸甲酯,或 碱土金属醇盐或b)基本脱水,任何过量游离的三烷基胺为 同时除去以三烷基甲酸铵形式存在的三烷基胺,通过将剩余的混合物与甲醇混合并将混合物加热至100至200℃以分离,形成甲酸甲酯和三烷基胺。
    • 8. 发明授权
    • 3-substituted 2-hydroxy-3-formylpropionic esters, the preparation
thereof and the use thereof for preparing 3-substituted 3-formylacrylic
esters
    • 3-取代的2-羟基-3-甲酰基丙酸酯,其制备及其用于制备3-取代的3-甲酰基丙烯酸酯的用途
    • US5256813A
    • 1993-10-26
    • US883342
    • 1992-05-15
    • Franz MergerJuergen Frank
    • Franz MergerJuergen Frank
    • C07C69/675C07C69/732
    • C07C69/675
    • A 3-substituted 2-hydroxy-3-formylpropionic ester of the formula I ##STR1## where R.sup.1 is lower alkyl, and R.sup.2 is straight-chain or branched alkyl of 1 to 10 carbon atoms, is obtained by adding an alkanal of the fomrula II ##STR2## and an alkyl glyoxylate of the formula III ##STR3## simultaneously to a catalyst system composed of a salt or a mixture of a secondary amine and a carboxylic acid in such a way that the temperature does not exceed 90.degree. C., preferably 80.degree. C., or else adding one of the reactants of the formula II or III to a mixture of the catalyst system described above and the other reactant in such a way that the temperature does not exceed 90.degree. C. The 2-hydroxy-3-formylpropionic eater of the formula I can be converted by treatment with dehydrating agents, especially acetic anhydride, into good yields of the corresponding 3-substituted 3-formylacrylic ester.
    • 其中R1是低级烷基,R2是具有1-10个碳原子的直链或支链烷基的式Ⅰ的3-取代的2-羟基-3-甲酰基丙酸酯是通过将烷基 的II型和式III(III)的烷基乙醛酸盐同时与由仲胺和羧酸的盐或混合物组成的催化剂体系,使得 温度不超过90℃,优选80℃,或者将一种式II或III的反应物加入到上述催化剂体系和另一种反应物的混合物中,使得温度不 超过90℃。式I的2-羟基-3-甲酰基丙酸酯可以通过用脱水剂,特别是乙酸酐处理转化成相应3-取代的3-甲酰基丙烯酸酯的良好产率。
    • 10. 发明授权
    • Preparation of cyclopentanones
    • 环戊酮的制备
    • US5166447A
    • 1992-11-24
    • US776688
    • 1991-10-15
    • Franz MergerTom Witzel
    • Franz MergerTom Witzel
    • C07C45/60C07C49/395C07C49/523
    • C07C49/395C07C45/60C07C49/523Y02P20/582
    • Cyclopentanones of the general formula I ##STR1## where R.sup.1 and R.sup.2 are each an organic radical or R.sup.1 or R.sup.2 may be hydrogen and R.sup.3 is hydrogen or formyl, are prepared by a process in which a 2-formyl-3,4-dihydropyran of the general formula II ##STR2## where R.sup.1 and R.sup.2 have the abovementioned meanings, a) where R.sup.3 is formyl, is converted in the presence of an acidic heterogeneous catalyst at from 50.degree. to 500.degree. C., andb) where R.sup.3 is hydrogen,b.sub.1) is reacted with water or an alcohol in the presence of an acidic heterogeneous catalyst at from 100.degree. to 500.degree. C. in the gas phase orb.sub.2) a compound II or an acrolein of the general formula III ##STR3## is reacted with water or with water in the presence of an acid or with an alcohol in the presence of an acid at from 150.degree. to 400.degree. C. in the liquid phase. Novel 2-formylcyclopentanones are obtained.
    • 其中R 1和R 2各自为有机基团或R 1或R 2可以是氢并且R 3为氢或甲酰基的通式I(I)的环戊烷酮通过其中2-甲酰基-3,4 - 二氢吡喃,其中R 1和R 2具有上述含义,a)其中R 3是甲酰基,在酸性多相催化剂存在下在50-500℃下转化,和 b)其中R3是氢,b1)在酸性非均相催化剂存在下,在气相中在100-500℃下与水或醇反应,或b2)化合物II或通式为的丙烯醛 在酸的存在下,在酸的存在下,在液相中,在150℃至400℃的条件下,将III(III)化合物与水或水在酸或醇的存在下反应。 得到新的2-甲酰基环戊烷酮。