Reducing fouling in heat exchangers
US9315661B2 · kind B2 · utility
0Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 11, 2015 |
| Grant date | Apr 19, 2016 |
| Priority date | — |
| Expiry date | Aug 11, 2035 |
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.