Method for producing rubber vulcanization agent 4,4'-disulfuration dimorpholine

Abstract

The invention discloses a method for producing rubber vulcanizing agent 4, 4'-dimorpholinyl disulfide, which belongs to the chemical technical field. The method comprises the following steps: prime city naphtha is added in a reaction kettle; sodium hydroxide fine powder is added to the solvent gradually under stirring condition; drewamine is added to the solvent; sulfur chloride is dripped within three to four hours at a temperature between 20 and 60 DEG C; after the mixture reacts for half an hour, the stirring is stopped; the mixture is kept stand for delamination; the sodium chloride deposited in the lower layer is discharged out; materials in the kettle are added with small amount of water to wash the materials, and are filtered to reclaim the solvent; the solvent is subjected to centrifuge-dripping to obtain a white crystal product; and the product is dried to obtain rubber vulcanizing agent 4, 4'-dimorpholinyl disulfide. The method can improve the yield and quality of the product, and reduce waste water discharge. The product has a melting point higher than 122 DEG C and ash content less than 0.5 percent.

Description

technical field [0001] The invention relates to a production method of a rubber vulcanizing agent, in particular to a production method of a rubber vulcanizing agent 4,4'-dimorpholine disulfide, which belongs to the technical field of chemical industry. Background technique [0002] 4,4'-dimorpholine disulfide is a rubber vulcanization accelerator, which can be used as a vulcanizing agent for natural rubber, various synthetic rubbers and their combined rubbers. It is suitable for various dynamic products, and is often used in radial tires, engineering tires, Manufacture of high-quality rubber products such as bias rubber tires, butyl inner tubes and rubber seals. The existing 4,4'-dimorpholine disulfide production method is to react morpholine and sulfur monochloride in a mixed solvent of toluene and benzene under the condition of liquid caustic soda, and produce a large amount of industrial waste water and A large amount of washing waste water has caused environmental gove...

AI Technical Summary

Problems solved by technology

The existing 4,4'-dimorpholine disulfide production method is to react morpholine and sulfur monochloride in a mixed solvent of toluene and benzene under the condition of liquid caustic soda, and produce a large amount of industrial waste water and A large amount of washing waste water has caused environmental governance difficulties, and the existence of water in the liquid caustic soda has increased the side reaction of water and sulfur monochloride, thereby making the yield of the product low and poor in quality, and the melting point of the product is low, only reaching 118- 120℃, ash content 0.5%-0.8%