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Synthesis method of dibutyltin dilaurate

A technology of dibutyltin laurate and dibutyltin dichloride, which is applied in the direction of tin organic compounds, can solve environmental pollution, a large amount of waste water, unfavorable environment and personal health, etc., to protect the environment and personal safety, shorten the process, and reduce energy consumption. consumption effect

Inactive Publication Date: 2015-04-29
沧州威达化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Toxic dust will be produced during the process, which is not conducive to the environment and human health. Among them, dibutyltin dichloride is hydrolyzed in caustic soda solution, which will produce a large amount of waste water and cause environmental pollution

Method used

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  • Synthesis method of dibutyltin dilaurate

Examples

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Comparison scheme
Effect test

Embodiment 1

[0018] A kind of synthetic method of dibutyltin dilaurate, comprising the following steps: (1) add 200g lauric acid, 123.3g dichloro Dibutyltin and 100mL of absolute ethanol, inject 226.6g of sodium ethoxide-ethanol solution with a mass fraction of 30% into the constant pressure dropping funnel, start heating and stirring, when the temperature of the mixed solution reaches 55°C, add the sodium ethoxide-ethanol solution dropwise , keep the dropping rate at 7mL / min;

[0019] (2) After the sodium ethoxide-ethanol solution is added dropwise, keep the temperature at 50-60°C. After reacting for 30 minutes, turn on the cooling water and start vacuuming to evaporate the ethanol solvent. When the temperature of the mixed solution in the reactor reaches 70 ℃, and when no liquid distills out, stop vacuuming and heating;

[0020] (3) Use a funnel to filter out the crystals in the feed liquid to obtain a light yellow liquid product.

Embodiment 2

[0022] A kind of synthetic method of dibutyltin dilaurate, comprising the following steps: (1) add 200g lauric acid, 123.3g dichloro Dibutyltin and 76mL of absolute ethanol, inject 226.6g of sodium ethoxide-ethanol solution with a mass fraction of 28% into the constant pressure dropping funnel, start heating and stirring, when the temperature of the mixed solution reaches 55°C, add the sodium ethoxide-ethanol solution dropwise , keep the dropping rate at 10mL / min;

[0023] (2) After the sodium ethoxide-ethanol solution is added dropwise, keep the temperature at 50-60°C. After reacting for 30 minutes, turn on the cooling water and start vacuuming to evaporate the ethanol solvent. When the temperature of the mixed solution in the reactor reaches 70 ℃, and when no liquid distills out, stop vacuuming and heating;

[0024] (3) Use a funnel to filter out the crystals in the feed liquid to obtain a light yellow liquid product.

Embodiment 3

[0026] A kind of synthetic method of dibutyltin dilaurate, comprising the following steps: (1) add 200g lauric acid, 123.3g dichloro Dibutyltin and 100mL of absolute ethanol, inject 226.6g of sodium ethoxide-ethanol solution with a mass fraction of 32% into the constant pressure dropping funnel, start heating and stirring, when the temperature of the mixed solution reaches 55°C, add the sodium ethoxide-ethanol solution dropwise , keep the dropping rate at 5mL / min;

[0027] (2) After the sodium ethoxide-ethanol solution is added dropwise, keep the temperature at 50-60°C. After reacting for 30 minutes, turn on the cooling water and start vacuuming to evaporate the ethanol solvent. When the temperature of the mixed solution in the reactor reaches 70 ℃, and when no liquid distills out, stop vacuuming and heating;

[0028] (3) Use a funnel to filter out the crystals in the feed liquid to obtain a light yellow liquid product.

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Abstract

The invention discloses a synthesis method of dibutyltin dilaurate, belonging to the field of organic synthesis. The synthesis method comprises the following steps of: 1, adding lauric acid, dibutyltin dichloride and ethanol into a reactor with a condenser pipe, heating and stirring mixed solution in the reactor, dropping sodium ethoxide-ethanol solution when temperature reaches 50-60DEG C; 2, after the sodium ethoxide-ethanol solution is completely dropped, maintaining the temperature, turning on a cooling water tap after reaction, starting to vacuumize, evaporating ethanol solvent, and stopping vacuumizing and heating when the temperature of the mixed solution in the reactor again reaches 70DEG C and no liquid is distilled off; and 3, conducting separation. By adopting the method of evenly mixing the dibutyltin dichloride instead of dibutyltin oxide with the lauric acid and then dropping sodium ethoxide-ethanol solution to prepare the dibutyltin dilaurate, the step of hydrolyzing dibutyltin dichloride in caustic soda solution is omitted, toxic dust and wastewater are not produced, the environmental and personal health is promoted and water resources are saved.

Description

technical field [0001] The invention relates to a synthesis method of dibutyltin dilaurate, which belongs to the field of organic synthesis. Background technique [0002] Dibutyltin dilaurate has excellent transparency, lubricity, and weather resistance. It is suitable for soft transparent PVC products. After processing, the surface gloss and transparency of the finished product are good, and there is no vulcanization pollution. With excellent light stability and transparency, it can be used as a stabilizer for polyvinyl chloride, mainly used for soft and semi-soft polyvinyl chloride products, such as transparent films, pipes, artificial leather, etc. It can also be used as a polyurethane catalyst. [0003] At present, the synthetic route of dibutyltin dilaurate is: use metal magnesium and butyl chloride as raw materials, through the Grignard reaction, to obtain n-butylmagnesium chloride, then react with tin powder to obtain tetra-n-butyltin, and then react with tin tetrachl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F7/22
Inventor 刘永军李怡
Owner 沧州威达化工股份有限公司
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