Phosgenation under pressure of alcohol's for producing chloroformates
First Claim
1. Process for phosgenating monohydroxy alcohols and/or polyols to obtain the corresponding chloroformates, which comprises reacting the alcohol and/or polyol in the presence or absence of solvent with a molar amount of phosgene of at least 3.4 per hydroxyl group, at a temperatures of between 0 and 200°
- C. and at a pressure of between 2 and 60 bar without a catalyst.
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Accused Products
Abstract
The invention concerns a method for phosgenation of monohydroxy alcohol'"'"'s and/or polyols characterised in that it consists of treating alcohol and or polyol, whether in the presence of solvent or not, with a molar excess of phosgene, preferably 2 to 30 times more phosgene than the hydroxyl groups, at temperatures ranging between 0 and 200° C. and at pressure levels ranging between 2 and 60 bar, preferably in the absence of any catalyst. The method is further characterised in that pressure is further used to facilitate the separation of hydrochloric acid from phosgene, in a column external to the reactor.
8 Citations
8 Claims
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1. Process for phosgenating monohydroxy alcohols and/or polyols to obtain the corresponding chloroformates, which comprises reacting the alcohol and/or polyol in the presence or absence of solvent with a molar amount of phosgene of at least 3.4 per hydroxyl group, at a temperatures of between 0 and 200°
- C. and at a pressure of between 2 and 60 bar without a catalyst.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
Specification