Tetrabutyl tin preparation method

Abstract

The invention discloses a modified synthesizing method of tetrabutyltin, which comprises the following steps: adding metal magnesium, ether solution and little synthesized Grignard reagent in the autoclave; heating to starting reacting temperature; dripping halogenated hydrocarbon and tin tetrachloride; controlling the temperature within alkylated reacting temperature. The invention possesses good security and reacting course, which is convenient to control dripping speed to receiving rate over 95%.

Description

technical field

[0001] The invention relates to the improvement of the tetrabutyltin preparation method, in particular to a tetrabutyltin preparation method with safe synthesis, controllable reaction, high yield and purity. Background technique

[0002] Organotin compounds and derivatives have a very wide range of uses and are an important chemical raw material. To synthesize organotin, the monomer tetrabutyltin must first be synthesized. Usually tetrabutyltin is synthesized by the following methods: Grignard method, Wutz method, alkylaluminum method, direct method, etc. Grignard method has been valued because of its many advantages. The synthesis of tetrabutyltin by Grignard method is usually carried out in two steps. Firstly, the ether solution of magnesium and halogenated hydrocarbon (such as chloroalkane or bromoalkane) is reacted to generate Grignard reagent, and then tin tetrachloride is added dropwise to In Grignard reagent, carry out alkylation reaction at 60-100°C ...