Process for cleaning vinyl chloride polymerization reactors
US3997360A · kind A · utility
8Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 11, 1975 |
| Grant date | Dec 14, 1976 |
| Priority date | — |
| Expiry date | Aug 11, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/62
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Polymeric deposits formed on internal surfaces of the reactors during polymerization or copolymerization of vinyl chloride are removed by dissolving them at a temperature above 60.degree. C with a solvent mixture comprising from 0 to 7% by weight of water, the remainder consisting of toluene and dimethylformamide in a weight ratio of toluene to dimethylformamide of from 50:50 to 90:10.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.