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Process for the preparation of hydrocarbyl halides

A technology of halides and metal halides, applied in chemical instruments and methods, tin organic compounds, compounds of group 4/14 elements of the periodic table, etc., can solve the problems of reduced economic benefits, expensive, bulky and difficult to use, and achieve Fast and safe operation, low cost and good yield effect

Inactive Publication Date: 2010-06-02
BAERLOCHER ITAL SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such equipment is expensive and often cumbersome, which reduces the economics of the described methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Tributylamine (63.6g, 0.34mol) was placed in a 500ml round bottom flask with a stirrer, thermometer socket and condenser. Tin tetrachloride (89.7g, 0.34mol) was slowly added over 1 hour under stirring conditions. The reaction temperature rose from 29°C to 65°C. After the addition is complete, the reaction mass is heated to 100°C under stirring, and then cooled to room temperature. Preparation of dimethyl tin dichloride

Embodiment 2

[0052] The catalyst prepared above (145 g) was placed in a 1 liter stainless steel autoclave, and then tin pellets (200 g, 1.68 gm-atom (mol)) were added. Fill the autoclave with nitrogen to expel the air and release the nitrogen into the air. Connect the methyl chloride cylinder to the reaction vessel. Maintain the temperature of the cylinder by placing it in a hot water bath. The mixture of catalyst and tin was heated to 185°C under stirring, and methyl chloride was introduced until the pressure reached 120 psi. Through the pressure drop in the reaction vessel, it was observed that the reaction started immediately. When the pressure drops to 100 psi, methyl chloride is introduced again until the pressure reaches 120 psi. Continue this step until no pressure drop is observed, indicating that the reaction is complete (330min). After cooling the reaction to about 85°C, the excess methyl chloride was slowly discharged. Fill with nitrogen and discharge excess. This ensures t...

Embodiment 3～10

[0054] The steps of Example 2 were repeated using different catalysts, and the preparation of the catalyst was as described in Example 1. When a complex between phosphine and tin tetrachloride is used, the amine is replaced by phosphine and all other reaction conditions are similar. The results are shown in Table 1.

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Abstract

Described is a process for the preparation of hydrocarbyl metal halides, such as alkyl tin chlorides, in which a reaction between the metal in its metallic state and a hydrocarbyl halide is catalyzedby a dihydrocarbyl sulfoxide or a dihydrocarbyl formamide in the presence of a hydrocarbyl metal halide and wherein the pressure of the reaction vessel is varied during the reaction.

Description

Technical field [0001] The present invention relates to a method for preparing hydrocarbyl metal halides such as alkyl tin chloride (alkyl tin chloride), wherein the metal in the metal state and hydrocarbyl halide (halogenated hydrocarbon) pass through the hydrocarbyl metal halide and dihydrocarbyl sulfoxide Or the reaction is carried out under the catalysis of the complex formed between the dihydrocarbyl formamides, and the pressure of the reaction vessel is changed during the reaction. Background technique [0002] Hydrocarbon substituted tin halides (tin halides) such as methyl tin chloride are very useful in preparing stabilizers for polymers, especially halogenated polymers such as polyvinyl chloride resins, chlorinated paraffins, etc. . Various methods of preparing hydrocarbyl tin chloride have been proposed. So far there is no completely satisfactory method. [0003] US 3,901,821A1 describes a method for preparing dimethyl tin dichloride by reacting metallic tin with meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F7/22
CPCC07F7/2216C07F7/2208
Inventor 安德烈亚·科米尼加内什·瓦拉德卡尔·马尤其帕德马卡尔·戈卡莱·阿纳德尚蒂拉尔·卡斯利瓦·拉金德拉阿尼尔·本达尔·吉塔
Owner BAERLOCHER ITAL SPA
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