Akzo Nobel Chemicals International B.v.

Akzo Nobel N.v.

Eilertdina Henderika Renkema

Antoon Jacob Berend Ten Kate

Carolina Anna Maria Christina Dirix

André Michiel Koolaard

Richard Herman Woudenberg

Hendrik Jan Vos

Anton Alexandru Kiss

Luc Louis Théophile Vertommen

Tim Baks

The present invention pertains to a process for preparing a product rich in epichlorohydrin, comprising the steps of: a) reacting a mixture of dichlorohydrin and a base at a temperature in the range of 0-40&#xb0; C. during a period of time in the range from 1 second to 180 minutes, wherein the base is present in a less than stoichiometric amount, to obtain a reaction mixture comprising epichlorohydrin and brine; b) subjecting at least part of the reaction mixture to a separation step to form a product fraction which is rich in epichlorohydrin and a brine fraction which is lean in epichlorohydrin; c) subjecting at least part of the brine fraction to a purification step to yield a purified brine. It has been found that the process according to the invention allows the manufacture of epichlorohydrin from dichlorohydrin on an industrial scale at high yield, while at the same time providing a brine with a low total organic carbon content without extensive separation being necessary.

Process for preparing epichlorohydrin from dichlorohydrin

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

Process for the chlorination of an organic compound comprising at least one aliphatic hydroxyl group, said process comprising the steps of actively adding to said organic compound (i) hydrogen chloride and (ii) a HCl desolubilizer or a precursor thereof, and heating the resulting mixture at a reaction temperature in the range 20&#xb0;-160&#xb0; C., wherein said chlorination is performed in the presence of a catalyst selected from the group consisting of (a) ketones, (b) aldehydes, (c) carboxylic acids with 1-8 carbon atoms, (d) organic compounds comprising a &#x3b2;-diketone moiety or a &#x3b2;-keto aldehyde moiety, and (e) organic polymers comprising at least one carbonyl group, having a vapor pressure at the reaction temperature of less than 1 mbar, a weight average molecular weight Mof 500 g/mole or more, and are soluble in the reaction mixture at the reaction temperature, and wherein the HCl desolubilizer is an alkali metal chloride salt, an alkaline earth metal chloride salt, or an acid.

Process for the chlorination of a hydroxylated organic compound

The present invention relates to a process for the catalytic halogenation of an organic compound comprising at least one vicinal diol moiety, said process comprising a step of bringing the organic compound comprising at least one vicinal diol moiety into contact with a hydrogen halide in the presence of a catalyst, characterized in that the catalyst is an organic compound comprising a &#x3b2;-diketone moiety or a &#x3b2;-keto aldehyde moiety.

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Renkum, Netherlands

Eilertdina Henderika Renkema