Production of tripheny-stannic chloride

A technology of triphenyltin chloride and a new method, applied in the direction of tin organic compounds, etc., can solve the problems of large environmental impact, large amount of sodium salt, difficult handling and the like

Inactive Publication Date: 2007-04-04
江苏春江农化有限公司
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  • Abstract
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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 to

Method used

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  • Production of tripheny-stannic chloride
  • Production of tripheny-stannic chloride

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specific Embodiment approach

[0024] The raw materials used in the present invention are: metal magnesium, tetrahydrofuran, bromoethane, chlorobenzene, toluene, 120 # Mineral spirits, tin and chlorine.

[0025] Concrete preparation steps are as follows:

[0026] ①The preparation of tin tetrachloride is to react tin tetrachloride with metal tin and chlorine gas in a closed container; the temperature is controlled below 70°C;

[0027] ② In tetrahydrofuran solvent, chlorobenzene and metal magnesium undergo Grignard reaction, the temperature is controlled below 80°C, and the reaction is carried out for 5 to 6 hours to obtain phenylmagnesium chloride, using haloalkane as the initiator;

[0028] ⑧Put phenylmagnesium chloride in toluene solvent, slowly add tin tetrachloride dropwise to carry out displacement reaction, control the temperature at 20°C-30°C, raise the temperature to 95°C-105°C after dropping, keep the temperature for 4 hours, Get tetraphenyltin and by-product magnesium chloride;

[0029] ④ Dissol...

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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...

Claims

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Application Information

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IPC IPC(8): C07F7/22
Inventor 庄夕华敖枝平张东华林军钱晖王开明
Owner 江苏春江农化有限公司
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