Method for continuously producing dimethyl disulfide

[0030] 433.2kg / h sulfur is melted and pumped to a tubular reactor with a diameter of 1m and a length of 10m, made of 304 stainless steel, and circulating 2999.9kg / h dimethyl disulfide (88.5wt% dimethyl disulfide, Dimethyl trisulfide 11.5wt%) mixed, by adjusting the circulating flow rate of dimethyl disulfide to control the reactor inlet temperature is 20 ℃, the stoichiometric ratio of dimethyl disulfide and sulfur (calculated as sulfur element) is 2.1, The reaction pressure is 0.2MPaA, the outlet temperature of the reactor is 30°C, the excess dimethyl disulfide makes the sulfur completely converted, and basically no dimethyl polysulfide is generated during the reaction.

[0031] 3433.1kg / h of reaction products (40.3wt% dimethyl disulfide and 59.7wt% dimethyl trisulfide) are mixed with 1298.9kg / h methyl mercaptan, and enter a tubular reactor with a diameter of 1.2m and a length of 12m , The material is 304 stainless steel, the stoichiometric ratio of dimethyl trisulfide to meth...

[0035] 434.2kg / h sulfur is melted and pumped to a tubular reactor with a diameter of 1m and a length of 10m, made of 304 stainless steel, and circulating 4500.3kg / h dimethyl disulfide (composed of dimethyl disulfide 75.9wt%, Dimethyl trisulfide 24.1wt%) mixed, by adjusting the circulating flow rate of dimethyl disulfide to control the reactor inlet temperature is 30 ℃, the stoichiometric ratio of dimethyl disulfide and sulfur (calculated as sulfur element) is 2.7, The reaction pressure is 0.4MPaA, the outlet temperature of the reactor is 35°C, the excess dimethyl disulfide makes the sulfur completely converted, and basically no dimethyl polysulfide is generated during the reaction.

[0036] 4934.5kg / h of reaction products (43.4wt% dimethyl disulfide and 56.6wt% dimethyl trisulfide) are mixed with 1298.9kg / h methyl mercaptan, and enter a tubular reactor with a diameter of 1.2m and a length of 12m , The material is 304 stainless steel, the stoichiometric ratio of dimethyl trisul...

[0040] 433.7kg / h of sulfur is melted and pumped to a tubular reactor with a diameter of 1m and a length of 10m, made of 304 stainless steel, and circulating 5000.3kg / h dimethyl disulfide (87.1wt% dimethyl disulfide, Dimethyl trisulfide 12.9wt%) mixed, by adjusting the circulating flow rate of dimethyl disulfide to control the reactor inlet temperature is 35 ° C, the stoichiometric ratio of dimethyl disulfide and sulfur (calculated as sulfur element) is 3.4, The reaction pressure is 0.6MPaA, the outlet temperature of the reactor is 40°C, the excess dimethyl disulfide makes the sulfur completely converted, and basically no dimethyl polysulfide is generated during the reaction.

[0041] 5434kg / h of reaction products (56.7wt% dimethyl disulfide and 43.3wt% dimethyl trisulfide) are mixed with 1298.9kg / h methyl mercaptan, and enter a tubular reactor with a diameter of 1.2m and a length of 12m. The material is 304 stainless steel, the stoichiometric ratio of dimethyl trisulfide to me...