Method for concentrating solution

Details Method for concentrating solution Method for concentrating solution

2007-10-02

2007-10-02

Manoharan, Virginia (Department: 1764)

Distillation: processes, separatory

With measuring, testing or inspecting

C203S002000, C203S088000, C203SDIG021, C203SDIG025, C159S047100, C210S664000, C210S806000, C523S340000, C560S218000

Reexamination Certificate

active

10634848

ABSTRACT:
An low concentration dope is fed through a nozzle into a concentrating apparatus, and flash evaporation of the low concentration dope is performed at an end of the nozzle. The low concentration dope is concentrated thereby to an concentrating dope which is contained and heated in the concentrating apparatus. Thus part of solvents of the low concentration dope and the concentrating dope is evaporated to a solvent gas. The solvent gas is cooled and condensed in a condensing section of the concentrating apparatus, and thereafter drawn through a first exit from the concentrating apparatus. The concentrating dope is concentrated to a high concentration dope, which is drawn through a second exit from the concentrating apparatus.

REFERENCES:
patent: 2538540 (1951-01-01), Thurman
patent: 2857962 (1958-10-01), Rogers
patent: 3586089 (1971-06-01), Mato et al.
patent: 3649471 (1972-03-01), Kunst
patent: 3713990 (1973-01-01), Lazet
patent: 4054625 (1977-10-01), Kozlowski et al.
patent: 4383891 (1983-05-01), Clavier
patent: 4414341 (1983-11-01), Williams
patent: 5047188 (1991-09-01), Okada et al.

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