Process for polypropene manufacture
US4777317A · kind A · utility
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25Claims
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Key dates
| Filing date | Feb 27, 1987 |
| Grant date | Oct 11, 1988 |
| Priority date | — |
| Expiry date | Feb 27, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2527/126
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Continuous Friedel-Crafts polymerization of propylene based feedstock in a polypropene reactor system to obtain viscous polypropene having a viscosity within the range of about 2 to about 200 centistokes, comprising: (a) continuously injecting water into the feed or the reactor at a monitored and controlled rate and (b) periodically increasing or decreasing the rate of water injection in response to deviations in the molecular weight of the polypropene product from a desired molecular weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.