Manufacturing method for 1,1,1,3,3-pentafluoropropane
US6060628A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1997 |
| Grant date | May 9, 2000 |
| Priority date | — |
| Expiry date | Aug 26, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/23
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A manufacturing method for 1,1,1,3,3-pentafluoropropane in which the method is composed of: PA1 step A wherein 2,3-dichloro-1,1,1,3,3-pentafluoropropane is reduced with hydrogen under the presence of hydrogenation catalyst in gaseous phase; PA1 step B wherein all of the products of the said step A are introduced into a cooler condenser, so that either a component of hydrogen and hydrogen chloride as non-condensation component and another compoment of 1,1,1,3,3-pentafluoropropane as condensation components or a component of hydrogen as non-condensation component and another component of hydrogen chloride and 1,1,1,3,3-pentafluoropropane as condensation component are obtained; PA1 step C wherein hydrogen is separated from the non-condensation component of the said step B, and it is recycled to the said step A; and PA1 step D wherein 1,1,1,3,3-pentafluoropropane is separated from the condensation component of the said step B. The producing method based on a manufacturing process of 1,1,1,3,3-pentafluoropropane can be provided with good efficiency and economy in industrial scales.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.