Method for continuously producing 2,3-dimethyl-1-butylene through 2,3-dimethyl-2-butylene

Abstract

The invention belongs to the technical field of chemical synthesis, and particularly relates to a method for continuously producing 2,3-dimethyl-1-butylene through 2,3-dimethyl-2-butylene. The 2,3-dimethyl-2-butylene takes isomerization reaction to generate the 2,3-dimethyl-1-butylene through a reaction tube containing isomerization catalysts; then, the 2,3-dimethyl-1-butylene enters a rectifying tower to be rectified; partial materials in a distillation kettle enter a heavy ingredient distillation kettle; high-boiling-point ingredients generated by side reaction are removed; then, the materials return to the rectifying tower; the 2,3-dimethyl-2-butylene is continuously added into the distillation kettle; the 2,3-dimethyl-1-butylene is continuously produced out from the rectifying tower. The method has the advantages that the isomerization catalysts are contained in the reaction tube; the isomerization reaction temperature can be conveniently controlled; the byproducts are reduced; in addition, the catalysts can be more favorably replaced; the adoption of the reaction kettle for isomerization reaction is avoided; the technical flow process operation is reduced; the continuous production is realized; the product quality is ensured; the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a method for continuously producing 2,3-dimethyl-2-butene from 2,3-dimethyl-1-butene. Background technique [0002] 2,3-Dimethyl-1-butene is an important intermediate of fine chemical products, used to produce spices, pesticides, etc., and is widely used in organic synthesis. In addition, due to its highly branched structure, the hydrogenated product of 2,3-dimethyl-1-butene is also used as a non-ether gasoline additive to increase its octane number. [0003] The synthesis methods of 2,3-dimethyl-1-butene include chemical method and propylene dimerization method. The earliest people used chemical methods to synthesize 2,3-dimethyl-1-butene, mainly including acetone dimerization method, alcohol dehydration method, photolysis method and aldehyde condensation method, and Grignard reagent method. Organic substances with functional groups such as carbonyl, hyd...

AI Technical Summary

Problems solved by technology

This process has many advantages, and the production of isopropanol has been improved; however, the accumulation of high-boiling components, that is, by-products during long-term reaction, will cause adverse effects on product quality, reaction temperature and catalyst.

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