Process for the manufacture of dichloropropanol by chlorination of glycerol
First Claim
1. A process comprising reacting glycerol with a chlorinating agent comprising hydrogen chloride to produce dichloropropanol in a vessel in which a liquid medium is in equilibrium with a vapour phase and according to which corrosion of at least a part of an inner vessel wall above the level of the liquid medium is at least partially avoided by cooling said inner vessel wall in order to maintain at least part of the inner vessel wall at a temperature lower than 120°
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Abstract
Process for the manufacture of dichloropropanol in which glycerol is reacted with a chlorinating agent comprising hydrochloric acid in a liquid medium in equilibrium with a vapor phase and in which the condensation of a fraction exhibiting the composition of the vapor phase is prevented.
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Citations
9 Claims
- 1. A process comprising reacting glycerol with a chlorinating agent comprising hydrogen chloride to produce dichloropropanol in a vessel in which a liquid medium is in equilibrium with a vapour phase and according to which corrosion of at least a part of an inner vessel wall above the level of the liquid medium is at least partially avoided by cooling said inner vessel wall in order to maintain at least part of the inner vessel wall at a temperature lower than 120°
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8. A process comprising reacting glycerol with a chlorinating agent comprising hydrogen chloride to produce dichloropropanol, and subjecting at least a part of the dichloropropanol to a dehydrochlorination reaction to produce epichlorohydrin, wherein said dichloropropanol is produced in a vessel in which a liquid medium is in equilibrium with a vapour phase and according to which corrosion of at least a part of an inner vessel wall above the level of the liquid medium is at least partially avoided by:
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(i) heating said inner vessel wall in order to maintain at least part of the inner vessel wall at a temperature at least 1°
C. higher than the dew temperature of the vapour phase, or(ii) trickling said inner vessel wall with a liquid having a temperature which is lower than the temperature of the vapor phase, or (iii) trickling said inner vessel wall with a liquid having a composition that allows to dilute a condensed vapor phase, or (iv) combining (ii) and (v) where (v) is; (v) cooling said inner vessel wall in order to maintain at least part of the inner vessel wall at a temperature lower than 120°
C.,or combining (iii) and (v), or combining (ii) and (iii) and (v), or combining (i) and (iii).
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Specification