Reducing fouling in heat exchangers
US9139784B2 · kind B2 · utility
1Cited by
2References
7Claims
0Family size
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Key dates
| Filing date | Dec 7, 2011 |
| Grant date | Sep 22, 2015 |
| Priority date | — |
| Expiry date | Jul 22, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF28F19/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
In the solution polymerization of ethylene co and homopolymers the solution leaving the reactor is heated to separate polymer from solvent and residual monomers. Fouling in the heat exchanger may be reduced by adding to the solution from 0.01 to 100 ppm by weight of a polyoxyalkylene compound of the formulaHO—(CH2CH2O)M[CH2CH(CH3)O]N(CH2CH2O)PHwherein M, N and P each represent the average number of repeating units and M is from 0 to 20, N is from 2 to 50 and P is from 0 to 20 and passing the solution through a heat exchanger to increase its temperature by at least 20° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.