Method of condensing phthalic anhydride
US3952022A · kind A · utility
9Cited by
2References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 14, 1974 |
| Grant date | Apr 20, 1976 |
| Priority date | — |
| Expiry date | Jan 14, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/573
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of condensing and recovering phthalic anhydride in dilute concentration in gases discharged from reactors. The method comprises condensing the anhydride on a solid granular carrier moving in a pneumatic conveyor, separating the condensate from its carrier and cooling the said carried in a fluidized bed for recycling it. The method is also application to the condensation of other sublimable substances.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.