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Information @ a Glance

General

  • Epichlorohydrin is reactive organic compound.

  • It is an epoxide and an organochloride. It is a colorless liquid with a pungent, garlic-like odor that is insoluble in water, but miscible with most polar organic solvents.

  • Epichlorohydrin is a highly reactive compound and will polymerize upon treatment with acid or strong base.

  • This compound will react violently with strong oxidants, anhydrous metal halides, strong acids and bases, alcohols, phenols, amines (especially aniline) and metals such as zinc and aluminium.

Process

  • Epichlorohydrin is manufactured from propylene through the intermediacy of allyl chloride.

  • The epichlorohydrin is reacted with an alkali nitrate, such as sodium nitrate, producing glycidyl nitrate and alkali chloride.

  • Epichlorohydrin is of interest both as the biological epoxidation product of allyl chloride (3-chloropropylene) and as an industrial synthesis product which is used in the manufacture of glycerol and epoxy resins, surfactants, resins, adhesives, pharmaceuticals, and agricultural chemicals.

Technology

  • ECH is produced by the conventional route starting with propenc and chlorine via allyl chloride (AC) and dichlorohydrin (DCH) to ECH. The world production capacity of ECH arnounts to about 850 kton per year.

  • The synthesis of ECI-I can be divided into four steps: synthesis of allylchloride (AC), synthesis of dichiorohydrin (DCH), synthesis of epichlorohydrin (ECH), synthesis of hypochlorite (HOCI).

  • Several end-of-pipe techniques are theoretically considered for treatment of the ECH effluent.

  • The novel technologt is based on using a totally different feedsock sompared to the tradiitonal Epichlorohydrin process, which uses chlorine and propylene as the raw materials.

Uses

  • Epichlorohydrin is used to make numerous substances, predominantly synthetic glycerin and unmodified epoxy resins.

  • It is used as a building block in making elastomers and other polymers, some of which are used in water supply systems.

  • It is used in making wet strength resins and water-treatment resins. It is used to make a variety of glycidyl derivatives, surfactants, plasticizers, dyestuffs, pharmaceuticals, emulsifiers, lubricants, and adhesives.

  • It is used as an insect fumigant. It is also used as a solvent for cellulose, resins, rosins, paints , and pesticide, and as a stabilizer in chlorine-containing substances.

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