Polymerization reactor
US5417930A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1994 |
| Grant date | May 23, 1995 |
| Priority date | — |
| Expiry date | Jun 21, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/00085
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A novel chemical reactor: one particularly useful for the production of polymers, especially elastomers such as butyl rubber. The reactor contains (1) a two-tube pass system, constituted of an inner or center tube bundle through which a mixture or slurry of polymerizable monomers and catalyst is passed in one direction, and recycled via an outer tube bundle in the opposite direction in essentially even flow distribution, (2) while the tubes of the center and outer tubular bundles are maintained within a jacketed section, or sections of the reactor into which a coolant, or refrigerant, is injected and vaporized to remove the heat of reaction. The coolant, or refrigerant, in heat exchange relationship with the tubes removes the exothermic heats of reaction from the polymerization mixture, and maintains the polymerization mixture at uniformly low temperature. An even flow circulation of the slurry which aids in maintaining uniform low temperature, is provided by the use of (3) a diffuser and (4) mixed flow pumping system, with its impeller, by virtue of which an adequate pressure head of even pressure profile is developed across the entry sides of the center tubes to maintain the even…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.