摘要:
A process for preparing acid formates which comprises (a) partially hydrolyzing methyl formates with water; (b) separating off by distillation methyl formate and methanol from the reaction mixture obtained in process stage (a), forming a stream comprising formic acid and water; and (c) combining the stream comprising formic acid and water from the process stage (b) and the corresponding formate, forming a mixture comprising the acid formate and water, an apparatus for their preparation and their use.
摘要:
The invention relates to a method for producing formic acid formates, whereby (a) formic acid methyl ester is partially hydrolysed with water; (b) formic acid methyl ester and methanol are separated by distillation from the reaction mixture obtained in step (a), forming a current containing formic acid and water; (c) the current obtained in step (b), containing the formic acid methyl ester and optionally methanol, is converted into a current containing formate and water, by (i) reaction with a basic compound having a pKa value of the corresponding acid of the corresponding dissociation step of=3, measured at 25° C. in an aqueous solution, in the presence of water, and (ii) separation by distillation of the methanol; and (d) the current obtained in step (b), containing formic acid and water, and the current obtained in step (c), containing formate and water, are combined to form a mixture containing the formic acid formate and water. The invention also relates in a device for producing said formic acid formates and to the use of the same.
摘要翻译:本发明涉及甲酸甲酸盐的制备方法,其中(a)甲酸甲酯用水部分水解; (b)甲酸甲酯和甲醇通过蒸馏从步骤(a)中获得的反应混合物分离,形成含有甲酸和水的电流; (c)将含有甲酸甲酯和任选的甲醇的步骤(b)中获得的电流转化成含有甲酸盐和水的电流,通过(i)与具有pK a a的碱性化合物反应, 在水溶液中,在水的存在下,在25℃下测定相应解离步骤的相应酸的相对值,并且(ii)通过蒸馏甲醇分离; 和(d)将包含甲酸和水的步骤(b)中得到的电流和步骤(c)中得到的含有甲酸盐和水的电流合并形成含有甲酸甲酸盐和水的混合物。 本发明还涉及用于生产所述甲酸甲酸酯的装置及其用途。
摘要:
The present invention relates to a process for the preparation of poly-C2-C4-alkylene glycol monoacrylic acid esters and monomethacrylic acid esters, and a process for the preparation of copolymers of such poly-C2-C4-alkylene glycol mono(meth)acrylic acid esters with acrylic acid or methacrylic acid and the use of the polymers as a plasticizing additive in cement-containing preparations.The preparation of the poly-C2-C4-alkylene glycol monoacrylic acid esters and monomethacrylic acid esters is effected by reacting acrylic anhydride or methacrylic anhydride ((meth)acrylic anhydride A below) with a poly-C2-C4-alkylene glycol compound P carrying at least one OH group in the presence of a base, the base being selected from basic compounds which have a solubility in the poly-C2-C4-alkylene glycol compound P of not more than 10 g/l at 90° C., and the molar ratio of (meth)acrylic anhydride A to compound P (molar ratio A:P) being in the range from 1:1 to 1.095:1, preferably in the range from 1.005:1 to 1.09:1, in particular in the range from 1.01:1 to 1.085:1 and particularly preferably in the range from 1.02:1 to 1.08:1.The preparation of copolymers of (meth)acrylic acid with poly-C2-C4-alkylene glycol mono(meth)acrylic acid esters comprises: i) preparation of a poly-C2-C4-alkylene glycol mono(meth)acrylic acid ester by reacting (meth)acrylic anhydride A with a poly-C2-C4-alkylene glycol compound P carrying at least one OH group in the presence of a base by processes according to the invention, and ii) free radical copolymerization of the poly-C2-C4-alkylene glycol mono(meth)acrylic acid ester obtained in step i) with acrylic acid and/or methacrylic acid and, if appropriate, further ethylenically unsaturated monomers.
摘要:
Disclosed is a method for jointly producing (i) formic acid (III); (ii) a carboxylic acid comprising at least two carbon atoms (II) and/or the derivatives thereof; and (iii) a carboxylic acid anhydride (VII). According to said method, (a) a formic acid ester (I) is transesterfied to formic acid (III) and the corresponding carboxylic acid ester (IV) by means of a carboxylic acid comprising at least two carbon atoms (II); (b) at least one portion of the carboxylic acid ester (IV) formed in step (a) is carbonylated in order to obtain the carboxylic acid anhydride (V); and (c) at least one portion of the carboxylic acid anhydride (V) formed in step (b) is further dehydrated by means of a carboxylic acid (VI) so as to form a carboxylic acid anhydride (VII) and the carboxylic acid (II).
摘要:
The present invention relates to methods for removing carbon dioxide and, if appropriate, water from breathing air in closed or partially closed systems using a porous metal-organic framework material, such systems having at least one breathing apparatus and also their use and methods for regenerating the porous metal-organic framework material.