Polyisobutylene prepared at high velocity and circulation rate
US8946361B2 · kind B2 · utility
2Cited by
25References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 10, 2012 |
| Grant date | Feb 3, 2015 |
| Priority date | — |
| Expiry date | Oct 10, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/00231
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of making a polyisobutylene polymer in a recirculating loop reactor with one or more reaction tubes in contact with a heat transfer medium includes controlling the delta P and polymerization reaction to provide a linear velocity of the reaction mixture of at least 11 ft/sec in the one or more tubes of the loop reactor and/or controlling the delta P and polymerization reaction of steps (b) and (c) to provide a recirculation ratio of the recirculation rate to the feed rate of at least 30:1. Typically, the process utilizes a recirculating pump operating at a at a pressure differential of from 35 psi to 70 psi.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.