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以十二水合硫酸铁铵为催化剂,己二酸与正丁醇为原料合成了己二酸二丁酯,讨论了醇酸物质的量比、催化剂用量、反应时间、带水剂等因素对酯化率的影响,确定了最佳工艺条件为:以0.1mol己二酸为基准,醇酸物质的量比为5.0∶1,催化剂用量为5.0g,反应时间为1.0h,不用带水剂,己二酸二丁酯的酯化率为98.2%。该催化剂具有催化活性高,反应时间短,酯化率高,与目前工业中使用的硫酸相比环境污染小,对设备几乎无腐蚀等优点,且十二水合硫酸铁铵价格低廉易得,性质稳定,不溶于反应体系,是一种很有发展前景的催化剂。
Dibutyl adipate was synthesized from adipic acid and n-butanol using ammonium ferric sulfate dihydrate as catalyst, and the effects of alkyd ratio, catalyst amount, reaction time and water-entraining agent on the formation of ester The optimum process conditions were as follows: 0.1 mol adipic acid was used as the base, the molar ratio of alkyd material was 5.0:1, the amount of catalyst was 5.0g, the reaction time was 1.0h, The esterification of dibutyl adipate was 98.2%. The catalyst has the advantages of high catalytic activity, short reaction time, high esterification rate, less environmental pollution compared with the sulfuric acid used in the present industry, little corrosion on the equipment, etc., and the ammonium ferric sulfate dodecahydrate is cheap and easily obtained, and the nature Stable, insoluble in the reaction system, is a very promising catalyst.