Title:
PROCESS FOR PURIFICATION OF MONOCHLOROACETIC ACID
Document Type and Number:
Japanese Patent JP2020019773
Kind Code:
A
Abstract:
To provide a process for the hydrodechlorination of a liquid feed comprising dichloroacetic acid (DCA).SOLUTION: The present invention relates to a process for the purification of a feed comprising monochloroacetic acid and dichloroacetic acid wherein the feed is subjected to a catalytic hydrodechlorination step by contacting it with a source of hydrogen to convert dichloroacetic acid into monochloroacetic acid in the presence of a solid heterogeneous hydrogenation catalyst comprising a Group VIII noble metal on a carrier under hydrodechlorination conditions, wherein the reaction is carried out in the presence of a catalyst enhancer which comprises a salt of a metal selected from the group of non-noble metals of Group VIII, Group VIB, Group VIIB, and Group IIB. The presence of a catalyst enhancer leads to reduced deactivation of the catalyst and/or increased activity of the spent catalyst, thereby allowing longer production cycles, less downtime, and lower formation of side products. The catalyst enhancer preferably comprises one or more of nickel, cobalt, or iron.SELECTED DRAWING: None
Inventors:
LARS MAGNUS TOLLIN
MELLE RINZE NIEUWHOF
ARIE GROOTENBOER
JACOBUS THEODORUS JOSEF AALDERING
HENRICUS JOHANNES MARINUS PETRUS VAN HAL
MATHEUS THEODORUS DE GROOT
MELLE RINZE NIEUWHOF
ARIE GROOTENBOER
JACOBUS THEODORUS JOSEF AALDERING
HENRICUS JOHANNES MARINUS PETRUS VAN HAL
MATHEUS THEODORUS DE GROOT
Application Number:
JP2019160105A
Publication Date:
February 06, 2020
Filing Date:
September 03, 2019
Export Citation:
Assignee:
NOURYON CHEMICALS INT BV
International Classes:
C07C51/487; B01J27/13; C07C53/16
Attorney, Agent or Firm:
Hiroshi Kobayashi
Eiji Katayama
Norio Omori
Tsukasa Iguchi
Yasuhito Suzuki
Eiji Katayama
Norio Omori
Tsukasa Iguchi
Yasuhito Suzuki