Method of producing vacuum in the production of polymers
US7317073B2 · kind B2 · utility
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1References
11Claims
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Inventor
Key dates
| Filing date | Mar 31, 2004 |
| Grant date | Jan 8, 2008 |
| Priority date | — |
| Expiry date | Jul 2, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/00162
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method is disclosed for producing a vacuum and for separating condensable components present in vapor which accumulates during the production of a polymer by melt-phase polycondensation under vacuum. Vapor produced during the production of polymers by melt-phase polycondensation in at least one reaction step under vacuum is drawn of by at least one steam jet vacuum pump with a down stream injection condenser. The steam jet vacuum pump is driven with alkylene carbonate in vapor form and liquid alkylene carbonate is then supplied to the injection condenser as coolant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.