ChemicalBook CAS DataBase List (E)-1,2,3,3,3-Pentafluoropropene

(E)-1,2,3,3,3-Pentafluoropropene synthesis

14synthesis methods

Product Name:(E)-1,2,3,3,3-Pentafluoropropene
CAS Number:5595-10-8
Molecular formula:C3HF5
Molecular Weight:132.03

431-63-0
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5595-10-8
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Yield:5595-10-8 89.9%

Reaction Conditions:

with hydrogen;potassium hydroxide in water at 135;Product distribution / selectivity;

Steps:

1

1005 g of a water and KOH mixture in which the KOH is present at 66% by weight are introduced into a one-litre cylindrical reactor made of stainless steel which is equipped with a heating device and with a device for measuring the temperature of the reaction medium. HFC-236ea, with a flow rate of 150 g/h, and hydrogen, with a flow rate of 12 Nl/h, are bubbled, using a dip pipe, into the medium maintained at 135° C. The gaseous products exit from the reactor via an orifice situated on the lid and are dried via a molecular sieve column and then collected in a stainless steel trap cooled with liquid nitrogen.The reaction is halted after introduction of 48.3 g of HFC-236ea and the following are obtained:a conversion of HFC-236ea of 92.7%a selectivity for HFO-I225ye (E+Z) of 99%a yield of HFO-I225yeE of 89.9%.The molar concentration of CF₂=CFH in the liquid collected in the trap at the outlet of the reactor is 0.02%.

References:

US2011/201852,2011,A1 Location in patent:Page/Page column 2

116-15-4 Synthesis