Separation of inorganic salts from dimethyl sulfoxide

Details Separation of inorganic salts from dimethyl sulfoxide Separation of inorganic salts from dimethyl sulfoxide

1997-09-09

1999-02-09

Manoharan, Virginia

Distillation: processes, separatory

Adding material to distilland except water or steam per se

Organic compound

203 89, 203 91, 159 49, 159DIG16, 159 473, B01D 122, B01D 310, B01D 334

Patent

active

058689087

ABSTRACT:
A process for separating inorganic salts from a solution of dimethyl sulfoxide, water and salts including feeding the solution plus a hydrocarbon based oil to a vacuum thin film evaporator. The DMSO and water are vaporized and condensed outside the evaporator for reuse or further purification. The salt and oil exit the evaporator as a liquid phase slurry. Water is added to the slurry to dissolve the salt and produce an aqueous phase and an oil phase which are separated. The oil phase is recycled to the thin film evaporator portion of the process.

REFERENCES:
patent: 3939036 (1976-02-01), Erwin
patent: 4094748 (1978-06-01), Schumacher
patent: 5190619 (1993-03-01), Berg et al.
patent: 5599979 (1997-02-01), Berg

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