Synthetic process for dodecenyl succinic anhydride

Abstract

The invention discloses a synthetic process for dodecenyl succinic anhydride. The synthetic process comprises the following steps: (a) firstly, mixing polyisobutylene and maleic anhydride according to a certain mole ratio, and placing the mixture of the polyisobutylene and maleic anhydride into a reaction vessel; (b) adding a catalyst and an initiator into the reaction vessel, and adjusting a pH value of the reaction system to 7.5 to 9.0; (c) adjusting a temperature of the reaction system, and carrying out a reaction at a high temperature under stirring; and (d) after the completion of the reaction, carrying out distillation under a certain pressure so as to obtain a product, and carrying out cooling for a period of time so as to obtain the target product. The synthetic process provided by the invention can successfully synthesize dodecenyl succinic anhydride, and has the advantages of simplicity, high synthesizing efficiency and low synthesizing cost; meanwhile, through controlling of the pH value in the process of synthesis, product conversion rate of the whole process is improved.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a synthesis process of dodecenylsuccinic anhydride. Background technique [0002] Dodecenyl succinic anhydride is also called dodecyl succinic anhydride with a molecular weight of 266.38. There are two kinds of straight chain type and branched chain type. LDDSA is used as epoxy resin curing agent with long pot life, less irritation and better performance of cured products. Light yellow transparent oily viscous liquid, relative density 1.002. The boiling point is 180~182°C (0.67kPa). The refractive index is 1.477. Viscosity (20°C) 590mPa·S. Due to the long aliphatic chain in the molecular structure, it can contribute better toughness to the cured epoxy resin. Soluble in acetone, toluene, petroleum ether, insoluble in water. Low toxicity, LD503200mg / kg. In the synthetic process method of dodecenylsuccinic anhydride at present, technological process i...

AI Technical Summary

Problems solved by technology

In the synthetic process method of dodecenylsuccinic anhydride at present, technological process is not easy to implement, and the synthetic technique finished product purity of the preparation dodecenylsuccinic anhydride of generation is low, and reactant single-pass conversion rate is low, and manufacturing procedure is complicated, Low production efficiency and high cost, not suitable for mass production