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Propylene Oxide

TECHNOLOGY FOR THE PRODUCTION OF PROPYLENE OXIDE


PROCESS FEATURES
The CONSER propylene oxide process is based on the chlorohydrination route using propylene, chlorine and milk of lime as feedstock.
This route may be considered the most economic for plants of average capacity and in all cases where the massive production of co-products (e.g. styrene), as required by other technologies, is not justified.
Being a leader in design of chlorohydrination plants, CONSER is in position to offer a valid and modern propylene oxide technology, characterized by improved efficiencies, easy, safe and reliable operation and very high purity of the product (greater than 99.9%).


REFERENCES

Company Location Capacity T/y
SIR  Italy  60000
MONTEDISON   Italy  35000 (Revamping)
TECHCORP  Iraq  15000
MONTEDISON   Italy  55000 (Revamping)

 

FLOWSHEET

PROPYLENE OXIDE

PROCESS DESCRIPTION
The propylene oxide technology of CONSER consists of the following main steps:

• Chlorohydrination
• 
Dehydrochlorination
• 
Propylene oxide purification


Chlorohydrination
Propylene, chlorine and water are fed to the chlorohydrin reactor, where the following main reaction occurs:

PO formula1

Other side or subsequent reactions are the following:

PO formula2

Dehydrochlorination

The chlorohydrin solution is treated with milk of lime to produce propylene oxide, according to the following reaction:

PO formula3

The reaction is accomplished in a distillation tower where propylene oxide is stripped by live steam injected to the bottom of the tower.
Waste water is taken off from the bottom of the stripper, while a raw propylene oxide stream is separated overhead.

Purification

Crude propylene oxide is purified in a distillation section.
By-products can be disposed to an incinerator, or distilled to recover a good quality solvent.

 


P.le Ezio Tarantelli, 100
00144 Rome - Italy

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Tel. (+39) 06 5262001
Fax (+39) 06 5205249

CF e n° reg. imp.: 00875210585
partita iva: 00938941002 
capitale sociale: € 130.800,00 i.v.
rea: 327729 trib. RM 318/70

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