Condensation products of thioalkylene oxides of polythio-alkylene oxides with polyalkylene oxides, their preparation and their use as breakers for water-in-oil emulsions
US4745175A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1986 |
| Grant date | May 17, 1988 |
| Priority date | — |
| Expiry date | Jan 22, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G81/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
New sulphur-containing polyethers based on optionally polymeric thioalkylene oxides and polyalkylene oxides, method for their preparation and their use as breakers for water-in-oil emulsions, in particular, as breakers for crude oil emulsions. The polyethers are of the formula ##STR1## in which R.sub.1 and R.sub.2, independently of each other, represent hydrogen and/or a straight-chain or branched C.sub.1 to C.sub.20 alkyl group, PA0 R.sub.3 and R.sub.4, independently of each other and independently of adjacent ##STR2## groups, represent in each case hydrogen, a straight-chain or branched C.sub.1 to C.sub.20 alkyl group and/or for --A--O--B, where PA1 A denotes a straight-chain or branched C.sub.1 to C.sub.20 alkylene group and PA1 B denotes a straight-chain or branched C.sub.1 to C.sub.20 alkylene-OH group or a ##STR3## group with R.sub.1 and R.sub.2 as defined above, n represents an integer from 1 to 100 and PA0 m represents an integer from 10 to 2,500.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.