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A method for the production of 2,2 - dimethyl - 1,3 - propandiolhydroxypivalinsaeuremonoester
A method for the production of 2,2 - dimethyl - 1,3 - propandiolhydroxypivalinsaeuremonoester
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机译:一种生产2,2-二甲基-1,3-丙二醇羟基新戊二醛单酯的方法
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摘要
1,3-propanediol hydroxypivalic acid monoester (I) prepn. of disporportionating hydroxypivalaldehyde (II) at increased temp in presence of the hydroxide of Ca, Ba or Sr, as in parent patent, is improved by reaction in presence of Ca(OH)2, Ba(OH)2, or Sr(OH)2 and of water, or in presence of =1 oxide and/or hydroxide of Li, Mg, Tl, Pb, Bi, La, Ce, Zn, Cd, Mn, Fe, Co, Ni and/or oxides to Ca, Sr and Ba, opt. in presence of water, in place of or in addn. to the hydroxides of Ca, Ba, or Sr. Yields and space-time yields are higher and a pure prod. is obtd. The rate of reaction is greater, and the reaction may be carried out at room temp. (II) may be pure, or the impure prod. of reaction of isobutyraldehyde with HCHO. The ester prepd. in presence of water may be purified over acid ion-exchangers. (I) is a raw material for synthetic resins and softeners.
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