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CN100582111C 生产螺环二醇的方法 有权

生产螺环二醇的方法
摘要：
在酸催化剂存在下，通过使季戊四醇和羟基新戊醛在水中反应生产螺环二醇的方法中，(A)在羟基新戊醛内的胺和胺盐的总含量降低到1.5wt%或更低；(B)在引发反应之前和/或在反应之中，基于供料到反应体系内的各种季戊四醇、羟基新戊醛、水、酸催化剂和种子晶体的总量，以1.5-30wt%的用量将种子晶体加入到反应体系中；(C)从反应引发到反应完成为止，保持反应体系的pH为0.1-4.0；和(D)基于供料到反应体系内的各种季戊四醇、羟基新戊醛、水、酸催化剂和种子晶体的总量，将由供料到反应体系内的季戊四醇和羟基新戊醛合成的螺环二醇的最大理论量和将加入到反应体系内的包含在种子晶体中的螺环二醇的量之和控制在5-35wt%范围内。所生产的螺环二醇具有增加的粒度。通过用碱性溶液洗涤螺环二醇，耐热性得到改进。
摘要（英）：

In the production of spiroglycol by the reaction of pentaerythritol and hydroxypivalaldehyde in water in the presence of an acid catalyst, (A) a total content of amines and amine salts in hydroxypivalaldehyde is reduced to 1.5% by weight or lower; (B) seed crystals are added to the reaction system before initiating the reaction and/or during the reaction in an amount from 1.5 to 30% by weight on the basis of the total feed amount of pentaerythritol, hydroxypivalaldehyde, water, the acid catalyst and the seed crystals, each being fed into the reaction system; (C) the pH of the reaction system is kept from 0.1 to 4.0 from initiation of the reaction to completion of the reaction; and (D) the sum of a maximum theoretical amount of spiroglycol to be synthesized from pentaerythritol and hydroxypivalaldehyde to be fed into the reaction system and an amount of spiroglycol contained in the seed crystals to be added to the reaction system is controlled within a range from 5 to 35% by weight on the basis of the total feed amount. The spiroglycol produced has an increased particle size. By washing the spiroglycol with a basic solution, the heat stability is improved.

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