Hydrotreating of recycled block copolymer solvent

Details Hydrotreating of recycled block copolymer solvent Hydrotreating of recycled block copolymer solvent

1975-12-18

1977-07-12

Michl, Paul R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C08F 610

Patent

active

040354458

ABSTRACT:
A process for the removal of impurities from solvents utilized in a cyclic process for the production of block copolymers is provided which comprises separation of block copolymers from their polymerization solvent, the separated solvent having a stated temperature, and hydrotreatment of the solvent with a heterogeneous hydrogenation catalyst at a weight hour space velocity greater than about two, whereby the undesirable contaminents are reduced, and recycling the hydrotreated solvent to the polymerization reactor.

REFERENCES:
patent: 3153027 (1964-10-01), Hagemeyer
patent: 3203891 (1965-08-01), Holden
patent: 3465065 (1969-09-01), Moss
patent: 3823085 (1974-07-01), Kochie
patent: 3853748 (1974-12-01), Tabler
patent: 3859370 (1975-01-01), Carter
patent: 3900526 (1975-08-01), Johnson
patent: 3959412 (1976-05-01), Oberlin

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