METHOD FOR PREPARING TERTIARY-BUTYL CHLORIDE Russian patent published in 2006 - IPC C07C17/08 C07C19/01 

FIELD: organic chemistry, chemical technology.

SUBSTANCE: invention relates to a method for synthesis of tert.-butyl chloride by interaction of isobutylene with hydrogen chloride in the presence (or absence) of a catalyst. The process is carried out at temperature -25-50°C, under pressure ≥1 atm in the reaction products medium based on recycle of part of tert.-butyl chloride formed and in the mole ratio isobutylene : hydrogen chloride = 1.0:(1.0-1.02). Catalytic complex of amine hydrochloride of the general formula: -[(R)₃NH]⁺Cl^- or amide hydrochloride of the general formula: -[(R)₂N=CH(OH)]⁺Cl^- wherein R means alkyl-, aryl-, isoalkyl- can be used as a catalyst in different combinations formed in situ in the reaction mixture in interaction of hydrogen chloride with nitrogen-containing compounds feeding to recycle tert.-butyl chloride in the amount 0.001-0.05 wt.-% of the reaction mixture amount wherein isobutylene and hydrogen chloride are fed at the volume rate 180-1650 h^-1. The reaction mixture is neutralized with hydrogen chloride acceptors, the end product is isolated by filtration and/or distillation and by stabilization of tert.-butyl chloride with 0.1-0.3 wt.-% of alkaline or earth-alkaline metal carbonates or hydrocarbonates. Invention provides enhancing quality and the yield of tertiary-butyl chloride and reducing waste.

EFFECT: improved preparing method.

8 cl, 1 tbl, 16 ex