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Preparation method of dialkoxyl xanthate polysulfide

A technology of dialkoxyxanthate and polysulfide, which is applied in the preparation of new rubber additives and the field of preparation of dialkoxyxanthate polysulfide, which can solve the problem of long synthesis process and high yield. And unstable quality, complex and cumbersome problems

Inactive Publication Date: 2016-11-09
SHANDONG YANGGU HUATAI CHEM
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Problems solved by technology

[0004] The synthesis process is long and complicated, the yield and quality are unstable, and the inorganic salt produced is a mixture of sodium sulfate and sodium chloride, which brings disadvantages to the reuse of the recovered inorganic salt.

Method used

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  • Preparation method of dialkoxyl xanthate polysulfide
  • Preparation method of dialkoxyl xanthate polysulfide
  • Preparation method of dialkoxyl xanthate polysulfide

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Embodiment Construction

[0007] A dialkoxy xanthate polysulfide, the structural formula is as follows:

[0008]

[0009] Among them, the alkoxy group (C X h 2X+1 In O), X=1, 2, 3..., is normal alkoxy and / or iso-alkoxy.

[0010] The preparation method of above-mentioned dialkoxy xanthate polysulfide comprises steps as follows:

[0011] (1) Add fatty alcohol and powdered sodium hydroxide to the organic solvent, stir at room temperature for 20-40 minutes, then slowly add carbon disulfide to the system, and obtain a mixture of sodium dialkoxydithioformate after the reaction is completed , fatty alcohol: carbon disulfide: sodium hydroxide: the molar ratio of organic solvent is (1.0~1.5):(1.0~1.5):1.0:(5.0~20.0);

[0012] (2) Slowly add sulfur chloride to the mixture of dialkoxy sodium dithioformate prepared in step (1), the mol ratio of the addition of sulfur chloride to carbon disulfide is: (0.5~1.0): (1.0~ 1.5), after the dropwise addition is completed, the obtained material is subjected to suctio...

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Abstract

Provided is a preparation method of dialkoxyl xanthate polysulfide. The preparation method comprises the steps that fatty alcohol, carbon disulfide and powdered sodium hydroxide synthesize sodium dimethyldithiocarbamate in an organic solvent, sulfur chloride (sulfur monochloride or sulfur dichloride) is dropwise added, and the dialkoxyl xanthate polysulfide is obtained through a reaction; after the reaction is completed, pumping filtration is conducted to separate out inorganic salt sodium chloride, inorganic salt sodium chloride is subjected to simple treatment to serve as a by-product for sale, liquid is subjected to rotary distillation separation to obtain the product, and the distilled organic solvent can be recycled. The preparation method is short in process, the product yield and quality are stable, and the production efficiency is high. The recovery technology of inorganic salt sodium chloride is simple, no other inorganic salt impurity is contained, the purity is high, and recycling is promoted.

Description

Technical field: [0001] The invention relates to a preparation method of a novel rubber additive, in particular to a preparation method of dialkoxyxanthate polysulfide, which belongs to the technical field of fine chemicals. Background technique: [0002] Dialkoxy xanthate polysulfide is a vulcanization accelerator used in natural rubber and synthetic rubber. Dialkoxy xanthate polysulfide molecules do not contain nitrogen, and no toxic substances will be produced after use, such as: thiourea, isothiocyanate, thiocyanate, N-nitrosamine, etc. Dialkoxy xanthate polysulfide is used as a compounding agent for latex and solid rubber, which can reduce the amount of many rubber accelerators, and is suitable for use with other accelerators, such as: ZBED, TBZTD, MBTS, etc.; two Alkoxy xanthate polysulfides can also be used in mineral processing and are an excellent mineral processing agent. [0003] The existing dialkoxy xanthate polysulfide synthesis process is completed in three ...

Claims

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Application Information

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IPC IPC(8): C07C329/14
CPCC07C329/14
Inventor 李剑波王文博杜孟成张琳郭庆飞
Owner SHANDONG YANGGU HUATAI CHEM
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