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3. 发明授权

US3923874A Continuous production of esters of glycols or their monoethers with lower fatty acids 失效
标题翻译：连续生产二醇或其单醚与低级脂肪酸的酯
公开(公告)号：US3923874A
公开(公告)日：1975-12-02
申请号：US36732773
申请日：1973-06-06
申请人： BASF AG
发明人： HOHENSCHUTZ HEINZ , HORNBERGER PAUL , GNAD JOSEF , DINKHAUSER GUENTER
IPC分类号： C07C69/02 , B01J27/00 , B01J31/00 , C07B61/00 , C07C67/08
CPC分类号： C07C67/08 , C07C69/08
摘要： Continuous production of substantially or wholly water-soluble esters of glycols or their monoethers with lower fatty acids by reaction of a glycol of the formula (I): HO-A-X (I) in which A is ethylene, propylene or butylene; and X is OH or OR in which R is alkyl of one to four carbon atoms or OAOH or OAOR in which A and R have the meanings given above with a lower saturated fatty acid at elevated temperature in the presence of a catalytic amount of a strong acid while continuously removing the water formed by means of an entrainer followed by treatment with an aqueous alkali. The glycol of the formula (I) is reacted in a first zone with the lower fatty acid, the water formed being distilled off as an azeotrope over the top by means of an entrainer, and the crude glycol ester including the entrainer is removed from the bottoms, mixes with an aqueous alkali, extracted in a second zone while supplying an extractant and water with phase separation and in a third zone the pure glycol ester is recovered from the resulting mixture of glycol ester, entrainer and extractant by rectification. Glycol esters are used as solvents for surface coating agents.
摘要翻译：通过式（I）的二元醇：其中A是乙烯，丙烯或丁烯的HO-A-X（I）的反应连续生产二醇或其单醚与低级脂肪酸的基本上或完全水溶性的酯; 并且X是OH或OR，其中R是1-4个碳原子的烷基或OAOH或OAOR，其中A和R在较高饱和脂肪酸中具有上述含义，在催化剂量的强度存在下，同时连续除去通过夹带剂形成的水，然后用碱水溶液处理。式（I）的二醇在第一区域与低级脂肪酸反应，形成的水通过夹带剂在顶部作为共沸物蒸馏出来，并将包含夹带剂的粗乙醇酯从底部，与碱水溶液混合，在第二区域中提取，同时提供萃取剂和进行相分离的水，在第三区域，通过精馏从所得到的乙二醇酯，夹带剂和萃取剂的混合物中回收纯乙二醇酯。乙二醇酯用作表面涂层剂的溶剂。

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