Sulfurized isobutylene closed path preparation industrialization method

Abstract

The invention provides a sulfurized isobutylene closed path preparation industrialization method, which is carried out in a closed path reaction system. According to the technical main points, the closed path reaction system comprises a raw material supplement unit, a three-phase separation unit, a waste liquid purification unit and a hydrogen sulfide recovery system, wherein the raw material supplement unit comprises a single sulfur chloride transportation tank, a single sulfur chloride storage tank and an addition reaction kettle; the single sulfur chloride transportation tank is communicated with a storage tank through double pipelines; and the single sulfur chloride storage tank is communicated with the addition reaction kettle through double pipelines. The reaction equipment and the container in the production process can be totally sealed, and discharged gas can be classified in a concentrated manner and is sequentially discharged to a tower suction system with an adequate absorption capability; tail gases can be strictly managed; waste water can be treated to recover Na2S, and colorless, transparent and tasteless waste water is discharged; and absorption liquid reaches to an end point, so that the corresponding solid Na2S can be obtained to enter the production circulation system. Therefore, the resources can be circularly used; the production cost can be reduced; and the economical benefits can be improved.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and in particular relates to a method for preparing sulfurized isobutylene, in particular to a closed-circuit preparation method for sulfurized isobutylene. Background technique [0002] Sulfurized isobutylene (T321) is an additive for lubricating oil. Due to its good oil solubility, high sulfur content, and low corrosion resistance to non-ferrous metals, it is widely used in the compounding agent for preparing vehicle gear oil and tool gear oil. , there is currently no better alternative. [0003] Among them, the raw material sulfur monochloride used in the production of T321 (also known as sulfur monochloride or disulfur dichloride, chemical formula S 2 Cl 2 ) is widely used as raw material for vulcanized isobutylene and other fine chemicals at atmospheric pressure. It is a yellow-red liquid with irritating and suffocating stench. It fumes strongly in the air; it decomposes into S and ...

AI Technical Summary

Problems solved by technology

However, with this method, it is difficult to control the ratio of the water-oil two-phase while keeping the yield constant

When the volume of the reactor is constant, if the water phase is too much, the concentration of the reactant in the dechlorination reaction will decrease, which will reduce the reaction efficiency; if the oil phase is too much, it will lead to the precipitation of NaCl salt

In addition, adopting this method wastes a large amount of NaCl, which is not conducive to environmental protection and reduces production costs.

[0007] To sum up, the key issue surrounding the production process of sulfurized isobutylene is environmental protection. If it is produced according to the general production rate, it usually does not meet my country’s requirements for the discharge of pollutants in chemical production, and is forced to reduce production, resulting in low profits and difficult to maintain production. As a result, many domestic companies were forced to suspend production

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