Epichlorohydrin EF

TECHNOLOGY FOR THE PRODUCTION OF EPICHLOROHYDRIN ECO-FRIENDLY 

PROCESS FEATURESEpichlorohydrin is a C3 organic epoxy compound, which combines the reactivity of an epoxy group (an oxygen bridge) with the additional reactivity of a chloro-group.Epichlorohydrin undergoes a great variety of chemical reactions with many types of compounds. It is the major raw material for epoxy resins, which account for up to 75% of total output.Thanks to its inherent versatility, it is used in a wide variety of other applications, including ion exchange resins, textiles, paper sizing, special inks and dyes, surface active agents, elastomers, plasticizers, agricultural products, liners, pharmaceuticals and many other applications.CONSER, besides having secured in the past decades a leading position as licensor of the conventional epichlorohydrin process from propylene and chlorine, has recently developed and patented a new technology route, called ECH-EF (epichlorohydrin eco-friendly), to produce epichlorohydrin using glycerin and hydrogen chloride as raw materials.The new ECH-EF technology shows that, thanks to the lower cost of the raw materials, to the lower plant investment cost, to the substantial reduction of energy consumption and of the aqueous and chlorinated by-products, it is the most effective route to produce epichlorohydrin.

REFERENCES

CompanyLocation

Capacity T/y

Technology

S.I.R Italy 36000Convention

al

ALCLOR Brasil 15000Convention

al

TECHCORP Iraq 10000Convention

al

HYCCS. Korea

20000Convention

al

TAMILNADU PETR. LTD India 10000Convention

al

SINOPEC-YUEYANG G.P.W. China 24000Convention

al

BLUESTAR NEW CHEMICAL MATERIALS

China 30000Convention

al

TANGSHAN RISUN CHEMICAL Co. China 100000Eco

- Friendly

 

FLOW SHEET

 

PROCESS DESCRIPTIONCONSER epichlorohydrin process consists of the following main steps:

• Chlorohydrination of glycerin• Dehydrochlorination of dichlorohydrins• Epichlorohydrin purification

Chlohydrination of glycerin

Glycerol dichlorohydrins are produced by reaction of liquid glycerin with gaseous hydrogen chloride at moderate temperature and pressure and by using an organic acid catalyst.The reaction occours through a two stages patented process, the first for the production of

monochlorohydrins (MCH) and the second for the production of dichlorohydrins (DCH).The reactor effluent enters the dichlorohydrin column, which separates under vacuum conditions DCH on top from MCH, heavy by-products and catalyst at bottom.

Dichlorohydrins hydrolysis

The hydrolysis of dichlorohydrins to epichlorohydrin, using caustic soda as saponifying agent, is accomplished in a distillation tower where epichlorohydrin is stripped by steam vaporized at the bottom of the tower.Waste water is taken off from the bottom of stripper, while an organic phase, consisting od raw epichlorohydrin, is separated overhead.

Epichlorohydrin purification

The raw epichlorohydrin is rectified in a fractionation column system.In the purification system high purity epichlorohydrin is separated from water and low and high boiling impurities.