Akzo Nobel Chemicals International B.v.

Nouryon Chemicals International B.v.

Anton Alexandru Kiss

Antoon Jacob Berend Ten Kate

André Banier De Haan

Cornelis Johannes Govardus Van Strien

Gerrald Bargeman

Melle Rinze Nieuwhof

Boelo Schuur

Jacobus Theodorus Josef Aaldering

Mark Theodorus Gerardus Jongmans

Hendrik Jan Vos

Eilertdina Henderika Renkema

Paul Verwer

Johannes Jozef Pragt

Alex Londoño Rodriguez

Johannes Josef Pragt

Costin Sorin Bildea

Catalin Patrut

Maikel Maria Van Iersel

Alex LONDOÑO Rodriguez

The invention relates to a process wherein a stream comprising dichlorohydrin, water, and HCI is separated into a stream which is rich in dichlorohydrin and low in HCI and an aqueous HCI stream which is low in dichlorohydrin. The process involves the distillation of the mixture comprising dichlorohydrin, water, and HCI with an amount of water being added before and/or during the distillation such that the water concentration during the distillation is on the line D-E, or to the right thereof, in the phase diagram of FIG.

Process for preparing dichlorohydrin

The present invention pertains to a process for separating monochloroacetic acid and dichloroacetic acid from one another via extractive distillation using (a) an extractive agent that is chemically stable and has a BFaffinity of between 65 kJ/mole and 110 kJ/mole and (b) an organic solvent that is either an acid with a lowest pKa of between 3.0 and 6.5 or a base with a BFaffinity of between 40 kJ/mole and 75 kJ/mole with the proviso that said BFaffinity is lower than the BFaffinity of the extractive agent, said organic solvent being chemically stable, and having a boiling point at atmospheric pressure of at least 468K, comprising the steps of (i) contacting a mixture comprising monochloroacetic acid and dichloroacetic acid with the extractive agent, (ii) distilling the mixture obtained in step (i) to obtain a monochloroacetic acid stream and a stream comprising dichloroacetic acid and the extractive agent, (iii) subjecting the stream comprising dichloroacetic acid and the extractive agent to a regeneration step, wherein the organic solvent is contacted with the mixture comprising monochloroacetic acid and dichloroacetic acid of step (i), or wherein the organic solvent is contacted with the mixture obtained in step (i) prior to and/or during step (ii), or wherein the organic solvent is contacted with the stream comprising dichloroacetic acid and the extractive agent obtained in step (ii) prior to or during step (iii), or any combination thereof.

Process for separating monochloroacetic acid and dichloroacetic acid via extractive distillation using an organic solvent

The present invention pertains to a process for separating monochloroacetic acid and dichloroacetic acid from one another via extractive distillation, comprising the steps of (i) contacting a mixture comprising monochloroacetic acid and dichloroacetic acid with an extractive agent which is chemically stable and which has a BFaffinity of between 65 kJ/mole and 110 kJ/mole, (ii) distilling the mixture to obtain a monochloroacetic acid stream and a stream comprising dichloroacetic acid and the extractive agent, and (iii) regenerating the extractive agent.

Process for separating monochloroacetic acid and dichloroacetic acid via extractive distillation

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Arnhem, Netherlands

Anton Alexandru Kiss