Process and unit for the production of 1,2-dichloroethane
US6252125A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 14, 2000 |
| Grant date | Jun 26, 2001 |
| Priority date | — |
| Expiry date | Apr 14, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/50
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
By a process for the production of 1,2-dichloroethane (EDC) by reaction of ethylene with chlorine in the liquid phase (direct chlorination), the heavy ends being separated from the obtained 1,2-dichloroethane in a heavy-ends column and in a downstream vacuum column and, for the purpose of heat recovery and heating of the column bottoms, a 1,2-dichloroethane part-stream from the direct chlorination passing through a heat exchanger (one attributed to each column) for indirect heat exchange with the bottom product of each column, the aim of the invention is to provide a solution in which the reaction enthalpy of the direct chlorination can be used in a variable manner, thus precluding the above-described disadvantages. This is achieved by using at least one falling-film evaporator for heating the column bottoms, the bottom product of the respective column being routed to the distributor at the head of the column.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.