METHOD FOR PREPARING 3-CHLOROPIVALIC ACID

WIPO Patent Application WO/2022/088304

A1

Disclosed is a method for preparing 3-chloropivalic acid, specifically a method for preparing 3-chloropivalic acid by using 3-chloro-2-methylpropene and carbon monoxide as raw materials. The product is prepared by subjecting the raw materials of 3-chloro-2-methylpropene and carbon monoxide to copolymerization in the presence of a hydrated strong acid catalyst, followed by purification by ether to obtain a fine 3-chloropivalic acid product with a purity of 99% or higher. The method has a high conversion rate, a high yield, few by-products, and simple product post-processing, and is in line with the green economy concept of recycling.

JP2739644	INDUSTRIAL APPLICABILITY: Method for carbonylation of conjugated diene
JPS6024089	[Title of the Invention] A generation method of fluoridation iso Butyryl

MI PENG (CN)
ZHU JUNWEI (CN)
CHEN QI (CN)
ZHANG YE (CN)
WEI FENG (CN)
XING WENGUO (CN)
FENG WEICHUN (CN)

PCT/CN2020/129935

May 05, 2022

November 19, 2020

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SHANDONG XINGQIANG CHEMICAL INDUSTRY TECH RESEARCH INSTITUTE CO LTD (CN)
UNIV QINGDAO SCIENCE & TECHNOLOGY (CN)

C07C51/14; C07C51/44; C07C53/19

USH000053H	1986-04-01
JPS4868520A	1973-09-18

NOBUYUKI SUGITA , TOMIYOSHI FURUTA , KIYOSHI KUDO , YOSHIMA TAKEZAKI: "Kinetic study of high-pressure reaction between metharyl chloride and carbon monoxide in hydrogen fluoride solvent", JOURNAL OF THE CHEMICAL SOCIETY OF JAPAN, vol. 8, no. 8, 8 October 1974 (1974-10-08), pages 1380 - 1385, XP055925931, ISSN: 0369-4577, DOI: 10.1246/nikkashi.1974.1380

JINAN CLAIM PATENT AGENCY OFFICE (GENERAL PARTNERSHIP) (CN)

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