Process for production of epichlorohydrin
US4634784A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 1985 |
| Grant date | Jan 6, 1987 |
| Priority date | — |
| Expiry date | Jun 4, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C29/62
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for producing epichlorohydrin comprising the steps of: PA0 (a) reacting allyl alcohol with chlorine at a temperature of -30.degree. C. to 20.degree. C. under a pressure of 0 to 10 atm (gauge) in an aqueous hydrogen chloride solution containing more than 45% but not more than 70% by weight of hydrogen chloride to form 2,3-dichloro-1-propanol; PA0 (b) separating at least a portion of the hydrogen chloride by heating the reaction mixture obtained at step (a) to recover the hydrogen chloride in the form of gas; PA0 (c) recycling the hydrogen chloride recovered at step (b) to step (a); PA0 (d) separating the resultant liquid mixture after recovering at least the portion of the hydrogen chloride at step (b) into an aqueous phase and an oil phase by cooling the resultant liquid mixture to a temperature of 40.degree. C. or less; PA0 (e) recycling at least a portion of the separated aqueous phase at step (d) to step (a); and PA0 (f) reacting the oil phase separated at step (d) directly or after increasing the purity of 2,3-dichloro-1-propanol contained in the oil phase by a separation operation with an aqueous alkaline solution or suspension at a temperature of 40.degree. C. to 11…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.