Preparation method of rubber plasticizer dioctyl sebacate

A technology of dioctyl sebacate and rubber plasticizer, which is applied in the field of preparation of dioctyl sebacate, can solve the problems of waste liquid polluting the environment, deepening product color and large amount of waste water discharge, etc., and achieves post-treatment process. Simple, short reaction time and high catalytic activity
CN104592015AInactive Publication Date: 2015-05-06QINGDAO WANGYU RUBBER
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
QINGDAO WANGYU RUBBER
Publication Date
2015-05-06
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention discloses a preparation method of a rubber plasticizing agent dioctyl sebacate. The method includes the following steps: 1, adding sebacic acid, 2-ethyl hexanol and a catalyst stannous oxide into a four-neck flask equipped with a thermometer, a reflux distributor and an agitator, introducing nitrogen, and conducting esterification reaction under 200 DEG C-230 DEG C; 2, after the reaction, cooling to 90 DEG C, adding lye water for neutralization, washing, standing for layering, releasing lye water, conducting reduced pressure distillation, and finally add activated carbon for adsorption and filleting to obtain the dioctyl sebacate product. The preparation method provided by the invention employs a non-solid acid catalyst stannous oxide for catalytic synthesis of dioctyl sebacate, and has the advantages of high catalytic activity, short reaction time, small amount of catalyst, light color of the obtained product, simple post treatment process, no corrosion of the catalyst on the equipment, no waste liquid produced, green, and environment-friendliness.
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Description

[0001] technical field

[0002] The invention relates to a method for preparing a rubber plasticizer, in particular to a method for preparing dioctyl sebacate.

[0003] Background technique

[0004] Dioctyl sebacate is a typical cold-resistant plasticizer, suitable for polyvinyl chloride, vinyl chloride copolymer, nitrocellulose, ethyl cellulose and synthetic rubber. High plasticizing efficiency, low volatility, excellent cold resistance, good heat resistance, light resistance and electrical insulation, and good lubricity when heated, making the product appearance and feel good, especially suitable for Used in the production of cold-resistant wire and cable materials, artificial leather, film, plate, sheet, etc. At present, the production process mostly uses concentrated sulfuric acid as a catalyst, and esterification is carried out under reduced pressure. Because sulfuric acid is prone to cause more side reactions at higher temperatures, resulting in darker product color,...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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