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A kind of synthetic method of stannous ricinoleate

A technology of stannous ricinoleate and synthesis method, which is applied in chemical instruments and methods, carboxylate preparation, carboxylate preparation, etc., and can solve the problems of stannous chloride inability and slow reaction speed, etc.

Active Publication Date: 2022-07-08
SHANGHAI MAIPU NEW MATERIAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is due to the weak acidity of ricinoleic acid and the slow reaction rate with stannous chloride, yet stannous chloride can react rapidly with water under heating (80-100° C.) to generate stannous hydroxide or stannous oxide, which As a result, stannous chloride cannot fully react with ricinoleic acid
And, the generation of tin protooxide also can cause the intramolecular esterification reaction of ricinoleic acid, generate a large amount of ricinoleic acid lactone by-products (see comparative example 1)

Method used

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  • A kind of synthetic method of stannous ricinoleate
  • A kind of synthetic method of stannous ricinoleate
  • A kind of synthetic method of stannous ricinoleate

Examples

Experimental program
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Effect test

Embodiment 1

[0033]

[0034] The first reaction, preparation of sodium ricinoleate: ricinoleic acid (107.4g, 0.36mol) and sodium hydroxide (14.4g, 0.36mol) were added to ethanol (360mL), and the ricinoleic acid molar concentration was 1.0M. The system was stirred for 4 hours at 64°C. After the reaction, the system was a clear system. The reaction solution was collected, and post-processing operation was carried out: the solvent was recovered by distillation under reduced pressure (can be recycled), then vacuum-dried by oil pump, and ground to obtain a pale yellow powdery solid, which was the target product sodium ricinoleate (114.3g), with a yield of 99.0 %.

Embodiment 2

[0036]The reaction steps and operations were the same as those in Example 1, and the difference from Example 1 was that the reaction solvent was methanol (360 mL). The reaction was stopped, and the target product sodium ricinoleate (114.4 g, yield 99.1%) was obtained after post-treatment.

Embodiment 3

[0038] The reaction steps and operations were the same as those in Example 1, and the difference from Example 1 was that the reaction solvent was isopropanol (360 mL). The reaction was stopped, and the target product sodium ricinoleate (114.1 g, yield 98.9%) was obtained after post-treatment.

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Abstract

The invention discloses a synthesis method of stannous ricinoleate. The present invention adopts two-step reaction, the first step of reaction takes ricinoleic acid as raw material, uses solvent A, and under certain reaction conditions, reacts with sodium hydroxide, sodium methoxide or sodium methoxide methanol solution to synthesize sodium ricinoleate; the second step Reaction, with sodium ricinoleate as raw material, using solvent B, under heating condition, with anhydrous stannous chloride, hydrated stannous chloride or stannous sulfate reaction synthesis stannous ricinoleate; Wherein, solvent A is alcohol solvent; solvent B is alcohol solvent, aromatic solvent or polar aprotic solvent; both solvent A and solvent B can be recovered by distillation and recycled. The invention has the advantages of low cost of raw materials, simple operation, less discharge of three wastes, and high reaction efficiency.

Description

technical field [0001] The invention relates to a method for synthesizing stannous ricinoleate, and belongs to the technical field of chemical organic synthesis. Background technique [0002] Polyurethane foam material has the advantages of light weight, good thermal insulation performance, excellent flexibility, wear resistance, heat resistance, elasticity, mechanical properties and high strength, and is widely used in refrigerators, freezers, building insulation boards, pipeline insulation, logistics cooling chain, modern automobile manufacturing and other fields. Due to the wide variety of requirements in the manufacture of polyurethane foams, catalysts are used in many cases. In addition to accelerating the reaction, these catalysts can also control the relative speed of the parallel reaction, affect the fluidity of the reaction mixture, the physical and mechanical properties of the finished product, and process technical parameters. [0003] Stannous octoate and dibut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C51/41C07C59/44
CPCC07C51/412C07C59/44
Inventor 吴凯凯余正坤周永贵
Owner SHANGHAI MAIPU NEW MATERIAL TECH CO LTD
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