Production of tripheny-stannic chloride

Abstract

Production of triphenyl tin tetrachloride is carried out by reacting tin with chlorine gas to obtain tin tetrachloride, lattice vector reacting magnesium with chlorobenzene in furanidine solvent, taking alkyl halide as initiating agent to obtain phenyl-magnesium-chloride, displacement reacting phenyl-magnesium-chloride with tin tetrachloride in methylbenzene solvent to obtain tin tetraphenyl, and disproportionation reacting tin tetraphenyl with tin tetrachloride to obtain the final product. It is cheap, has more yield, better safety coefficient and circulation usage.

Description

Technical field: [0001] The invention relates to a preparation method of triphenyltin chloride, which is an essential intermediate for preparing pesticide triphenyltin acetate and triphenyltin hydroxide. Background technique: [0002] Pesticides triphenyltin acetate and triphenyltin hydroxide are high-efficiency, low-toxicity, broad-spectrum fungicides, which can effectively prevent and control the fungal damage of various crops sensitive to copper fungicides, and use them to prevent sugar beet browning Spot disease, the sugar content of sugar beets can be increased by 60% to 80%, and the yield can be increased by 10% when used to prevent and control potato late blight. Diseases have excellent control effect. It can also be used in marine coatings to prevent the growth of algae attached to the hull. [0003] Triphenyltin chloride is an essential key intermediate for the production of triphenyltin acetate and triphenyltin hydroxide. The current preparation method is the sod...

AI Technical Summary

Problems solved by technology

[0007] Sodium metal must be used in this preparation process. The melting point of sodium metal is 98°C, and the boiling point of toluene is 105°C-110°C. Sodium metal must be heated above 98°C in toluene to soften and facilitate crushing. If the temperature is too high, toluene will evaporate again, and the evaporated toluene will take out the metal sodium powder, and it will burn and explode when it encounters water or humidity. This problem is especially prominent in southern climate conditions; the equipment used for metal sodium crushing is titanium Steel special equipment is expensive and the use conditions are harsh; although toluene can be recycled and applied mechanically, toluene will be converted into xylene during multiple recycling processes, and its boiling point will drop. When the boiling point is lower than 98 degrees, the pulverized Metal sodium particles will re-agglomerate, affecting the reaction speed; at the same time, the amount of sodium salt produced in the reaction process is large, difficult to handle, and has a great impact on the environment. With the improvement of environmental protection requirements, this preparation method has been recognized by environmental protection, safety double restrictions, more and more abandoned by people

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