Process of drying and removing solids from waste oil

Details Process of drying and removing solids from waste oil Process of drying and removing solids from waste oil

1994-08-05

1995-10-17

Pal, Asok

Mineral oils: processes and products

Refining

Purifying used oil

208188, 208289, 585833, C10M17502, C10G 3304

Patent

active

054587654

ABSTRACT:
This invention is a process comprising several steps for removing solid contaminants and for assisting in the dewatering of liquid hydrocarbons. For the purposes of this invention, solid contaminants include dissolved salts, either in the oil or in the emulsified water phase, or dispersed undissolved solids. First, a sample of liquid hydrocarbon containing solid contaminants is heated to a temperature in the range of 180.degree. F.-200.degree. F. Following heating, an aqueous solution of carbodihydrazide is added to the liquid hydrocarbon and the liquid hydrocarbon is re-heated to a temperature of 180.degree. F. to 200.degree. F. After re-heating, a demulsifier is added to the liquid hydrocarbon and water and the precipitated solids are separated from the liquid hydrocarbon.

REFERENCES:
patent: 3879282 (1975-04-01), Johnson
patent: 3930988 (1976-01-01), Johnson
patent: 4151072 (1979-04-01), Nowack et al.
patent: 5057207 (1991-10-01), Basler
patent: 5160425 (1992-11-01), Lewis
patent: 5213678 (1993-05-01), Rondum et al.
patent: 5288394 (1994-02-01), Lewis et al.

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