Urea adduction process for refrigeration oil manufacture

Details Urea adduction process for refrigeration oil manufacture Urea adduction process for refrigeration oil manufacture

1976-10-12

1978-01-24

Levine, Herbert

Mineral oils: processes and products

Paraffin wax; treatment or recovery

With ureas

208 14, C10G 2922, C10G 4302

Patent

active

040702693

ABSTRACT:
In the process of manufacturing a refrigeration oil where an oil stock is dewaxed by forming a complex with urea in the presence of an activator, the improvement of adding hot vacuum gas oil to the separated urea complex whereby the activator is flashed off and is recycled for reuse and the slurry of the urea complex in the gas oil is treated with hot water to break the adduct and separate a water-urea mixture and oil and paraffin. The improved method enables accurate and uniform temperature control and degradation of urea is suppressed.

REFERENCES:
patent: 2731455 (1956-01-01), Salzmann et al.
patent: 2786015 (1957-03-01), Axe
patent: 2890161 (1959-06-01), Brown et al.
patent: 3644201 (1972-02-01), Paassen et al.

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