Method for concentrating solution

Details Method for concentrating solution Method for concentrating solution

2007-08-07

2007-08-07

Manoharan, Virginia (Department: 1764)

Distillation: apparatus

Apparatus

Systems

C159S002100, C159S004060, C159SDIG010, C202S189000, C202S190000, C202S262000, C202S205000

Reexamination Certificate

active

11371906

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: 3004899 (1961-10-01), Hunt et al.
patent: 3004900 (1961-10-01), Hunt et al.
patent: 3713990 (1973-01-01), Lazet
patent: 3779871 (1973-12-01), Brown
patent: 4383891 (1983-05-01), Clavier
patent: 4414341 (1983-11-01), Williams
patent: 4551198 (1985-11-01), Wiley
patent: 4744957 (1988-05-01), Imai et al.
patent: 4950363 (1990-08-01), Silvey

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