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Preparation method of stannous neodecanoate

A technology of stannous caprate and new capric acid is applied in the chemical industry, which can solve the problems of easy oxidation and unstable chemical properties of tin catalysts, and achieve the effect of stable storage.

Pending Publication Date: 2019-11-01
JIANGXI MENHOVER CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of preparation method of new stannous decanoate, the preparation method of described this new stannous decanoate will solve the unstable chemical property of the tin catalyst of preparing flexible polyurethane foam in existing record, Highly oxidized technical problems

Method used

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  • Preparation method of stannous neodecanoate
  • Preparation method of stannous neodecanoate
  • Preparation method of stannous neodecanoate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Preparation of tin protochloride solution: in a 1000ml four-necked flask with fixtures, constant temperature function, mechanical stirring, thermocouple and nitrogen, 250g tin particles are dropped into the flask, then 435.75g is added dropwise A hydrochloric acid solution with a mass percentage concentration of 37%, stirred at room temperature for 24 hours, slowly warming up to 110-120°C, concentrating the stannous chloride solution, the reaction kettle is in a cooling reflux state during the heating process, and the temperature of the reflux cooling brine is -15°C, and the reaction The hydrogen produced is put into the lye spraying device with the vent pipe, the stannous chloride solution is concentrated to a mass percentage of stannous to be 37%, the reaction kettle is down to normal temperature, and the reaction solution is pressure-filtered under the protection of nitrogen, Unreacted tin particles were filtered off to obtain a tin protochloride solution.

[001...

Embodiment 2

[0022] (1) Preparation of tin protochloride solution: in a 1000ml four-necked flask with fixture, constant temperature function, mechanical stirring, thermocouple and nitrogen gas, 250g tin particles are dropped into the flask, then 531.4g is added dropwise A hydrochloric acid solution with a mass percentage concentration of 37%, stirred at room temperature for 24 hours, slowly warming up to 110-120°C, concentrating the stannous chloride solution, the reaction kettle is in a cooling reflux state during the heating process, and the temperature of the reflux cooling brine is -15°C, and the reaction The hydrogen produced is put into the lye spraying device with the vent pipe, the stannous chloride solution is concentrated to a mass percentage of stannous to be 35%, the reaction kettle is down to normal temperature, and the reaction solution is pressure-filtered under the protection of nitrogen, Unreacted tin particles were filtered off to obtain a tin protochloride solution.

[0...

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Abstract

The invention belongs to the field of chemical engineering, and provides a preparation method of stannous neodecanoate. The preparation method comprises the following steps: weighing neodecanoic acidand stannous oxide according to a material ratio, wherein a molar ratio of the stannous oxide to the neodecanoic acid is 1.0:(2.0-5.0), adding the neodecanoic acid and the stannous oxide into a reaction kettle, starting stirring and a vacuum pump, carrying out a dehydration reaction at 100-115 DEG C until no distillate comes out, continuing the reaction for 1-2 h, carrying out cooling, and carrying out filtering to obtain the stannous neodecanoate. According to the method provided by the invention, the stannous neodecanoate prepared by the method can be used as a gel catalyst to be used in thepolyurethane foam industry, and compared with a traditional stannous octoate catalyst, the stannous neodecanoate provided by the invention is more environmentally-friendly and has better stable storage property.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a stannous neodecanoate, specifically a preparation method of stannous neodecanoate and its application in polyurethane foam. Background technique [0002] Flexible polyurethane foam is usually mixed with polyether polyol or polyester polyol, water, amine catalyst, silicone surfactant, tin catalyst, physical foaming agent, other additives and isocyanate under high-speed stirring. Alcohol, water and isocyanate react quickly under the action of a catalyst to form a foam with a network structure. At the same time, the physical blowing agent volatilizes, and the reaction between water and isocyanate produces a large amount of gas that fills the foam, resulting in the continuous expansion of the foam. Finally, the foam The gas inside the body volatilizes from the foam body, and the foam body reaches the maximum volume. After the gas volatilizes, the foam body slightly falls back, and it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/41C07C53/126C08G18/24C08G101/00
CPCC07C51/418C08G18/24C08G2101/00C07C53/126
Inventor 张文凯龚国安信延垒宋慧
Owner JIANGXI MENHOVER CHEM TECH CO LTD