Method for the continuous crystallization of a solid component with a centrifugal film evaporator
US3977936A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 1975 |
| Grant date | Aug 31, 1976 |
| Priority date | — |
| Expiry date | Sep 9, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D9/005
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for continuously crystallizing a solid component by continuously feeding a solution of the solid component in water or an organic solvent to a centrifugal film evaporator equipped with a scraper blade, which comprises feeding the solution from the top of the evaporator which comprises a heating section in the upper stream and a cooling section in the lower stream, forming a film of the solution on the wall of the evaporator, passing the film of the solution down into the heating section in order to evaporate the solvent, discharging the evaporated solvent from an upper outlet by feeding an inert gas or aspirating the solvent vapor in order to prevent the passage of evaporated solvent into the cooling section and contacting the cooling section of the evaporator with the concentrated solution whereby a crystallized solid or a slurry of solid particles is formed. This is a continuation, of application Ser. No. 443,519, filed Feb. 19, 1974 now abandoned.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.