Wet and dry distillative freezing process for separating mixture

Details Wet and dry distillative freezing process for separating mixture Wet and dry distillative freezing process for separating mixture

1984-05-24

1986-03-25

Sever, Frank

Refrigeration

Processes

Circulating external gas

23294S, 62532, B01D 904, F25J 300

Patent

active

045780935

ABSTRACT:
A wet and dry distillative freezing process is provided which comprises (a) a first step of transforming a liquid feed mixture into a first solid-liquid mixture, denoted as K.sub.-1 mixture, by either a conventional freezing operation or a wet distillative freezing operation, (b) a second step of washing the K.sub.-1 mixture with a wash liquid to thereby form a second solid-liquid mixture, denoted as K.sub.o mixture, and an impure liquid L.sub.o, and (c) a third step of subjecting the K.sub.o mixture to a dry distillative freezing operation to thereby form a mass of refined solid phase, denoted as S.sub.1, and a low pressure vapor V.sub.1. Various wash liquids may be used in the crystal washing step. It is important to note that the wash liquid used does not have to be a pure liquid but may contain some volatile impurities. This is so, because the volatile impurities in the wash liquid will be taken up in the K.sub.o mixture and will be removed in the dry distillative freezing step. Convenient wash liquids to use are (a) a mass of the feed liquid, (b) a mass of the condensate liquid, and (c) a part of the product liquid. One may also use a solution containing the crystallizing component and a selected volatile component as a wash liquid.

REFERENCES:
patent: 3425235 (1969-02-01), Cox
patent: 4451273 (1984-05-01), Cheng et al.

Affiliated with

Also associated with

Rating

Wet and dry distillative freezing process for separating mixture does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Wet and dry distillative freezing process for separating mixture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wet and dry distillative freezing process for separating mixture will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-628501