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Method for recovering and utilizing tributyl tin chloride

A technology of tributyltin chloride and monobutyltin trichloride, which is applied in the field of recycling and utilization of tributyltin chloride, can solve the problems of serious environmental pollution and difficult to handle, and achieves easy production and less waste. Effect

Pending Publication Date: 2019-05-31
南通濠泰化工产品有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When tributyltin chloride is used as an intermediate catalyst in pharmaceutical processing, it cannot continue to be used as waste after being applied for a certain number of times due to the high content of impurities. However, tributyltin chloride has serious environmental pollution and is not easy to handle.

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  • Method for recovering and utilizing tributyl tin chloride

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Embodiment Construction

[0011] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. It should be noted here that the descriptions of these embodiments are used to help understand the present invention, but are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.

[0012] see figure 1 , this specific embodiment discloses a method for recycling tributyltin chloride, comprising the following steps: (1) performing high-vacuum temperature-raising distillation on tributyltin chloride with a weight content of less than 80% in a hydrogen chloride atmosphere; The vacuum degree is 20Pa, and the final heating temperature is 140°C-160°C; (2) the tributyltin chloride product obtained after vacuum distillation is mixed with tin tetrachloride t...

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Abstract

The invention discloses a method for recovering and utilizing tributyl tin chloride. The method comprises following steps: (1) heating and distilling tributyl tin chloride with a weight content less than 80% in a hydrogen chloride atmosphere with a high vacuum degree of 20 Pa, wherein the final temperature is 140 to 160 DEG C; (2) after vacuum distillation, mixing obtained tributyl tin chloride product with tin tetrachloride, carrying out reactions at a controlled temperature to obtain a mixture composed of monobutyl tin trichloride and dibutyl tin dichloride; and (3) distilling and separatingthe mixture obtained in the step (2) to obtain monobutyl tin trichloride and dibutyl tin dichloride. The method has the advantages that the difference between the melting points of monobutyl tin trichloride and dibutyl tin dichloride is large, thus the separation is easy, the generated wastes are little, the production is easy, monobutyl tin trichloride and dibutyl tin dichloride can be individually sold, and the waste tributyl tin chloride catalysts are fully recovered and utilized.

Description

technical field [0001] The invention relates to an organotin catalyst, in particular to a method for recycling tributyltin chloride. Background technique [0002] Tributyltin chloride has antiseptic, bactericidal, anti-mildew effects, etc. It can be used as rodenticide, rodent-repelling cable coating and synthetic intermediate, and can be widely used in wood preservation, ship paint, etc. At the same time, it is widely used in the pharmaceutical industry as a pharmaceutical intermediate. It can be used as a catalyst, introducing tributyltin groups in organic synthesis, and prostaglandin synthesis. When tributyltin chloride is used as an intermediate catalyst in pharmaceutical processing, it cannot be used mechanically after a certain number of times due to the high content of impurities and becomes waste. However, tributyltin chloride has serious environmental pollution and is not easy to handle. Contents of the invention [0003] The technical problem to be solved by th...

Claims

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Application Information

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IPC IPC(8): C07F7/22
Inventor 姜盼盼刘美芳
Owner 南通濠泰化工产品有限公司
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