Method of pump-around cooling reaction mass during polymerization of olefins
US4089365A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1976 |
| Grant date | May 16, 1978 |
| Priority date | — |
| Expiry date | Sep 30, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S165/903
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Cooling the highly viscous reaction mass during catalytic polymerization of liquid olefins to polyolefins by pumping it to and from the reactor through the tubes of a heat transfer single pass cooler rather than a heat transfer multi-pass cooler as has been done in the past, increasing the number of the tubes in the single pass cooler as compared to the multi-pass cooler, reducing the diameter of the tubes and increasing the pump capacity. The number of tubes and pump capacity are increased sufficiently and the internal diameters of the tubes are decreased sufficiently so that the heat transfer coefficient of the single pass cooler is between 10 and 20 BTU/ft.sup.2 hr. .degree. F.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.