ABSORPTION VAPOR PRESSURE ENHANCEMENT PROCESS AND ITS APPLICATIONS IN HIGH LEVEL REFRIGERATION AND SEPARATION PROCESSES - Patent Pending

(12) Patent Application: (11) CA 2079895
ABSTRACT:
2079895 9113301 PCTABS00007 This invention introduces an absorption vapor pressure
enhancement operation. In the process, a mass of solvent vapor is absorbed into an absorbing solution under a first pressure and an
equivalent amount of second vapor is produced under a second pressure
that is substantially higher than the first pressure. The pressure
enhancement is accomplished by the dilution of the absorbing
solution. A vapor pressure enhancement operation (98, 99) applied to a
low pressure vapor is functionally equivalent to compressing a
low pressure vapor. By using a multiple stage pressure enhancement
operation (98, 99), a very high level of temperature lifting of heat can be accomplished. The process can be adopted in processes
in which low pressure vapors are generated. Examples are freeze drying processes and multiple phase transformation processes such
as Vacuum Freezing Processes, Eutectic Freezing Processes and
Distillative Freezing Processes.
(72) Inventors (Country): CHENG, CHEN-YEN (United States)
(73) Owners (Country): CHENG, CHEN-YEN (United States)
(71) Applicants (Country): CHENG, CHEN-YEN (United States)
(74) Agent: BORDEN LADNER GERVAIS LLP
(45) Issued:
(86) PCT Filing Date: Feb. 26, 1991
(87) PCT Publication Date: Sep. 5 , 1991
Examination requested: Feb. 18, 1998
(51) International Class (IPC): F25J 5/00
B01D 9/04
Patent Cooperation Treaty (PCT): Yes (85) National Entry: Oct. 5 , 1992
(86) PCT Filing number: PCT/US1991/001397
(87) International publication number: WO1991/013301
(30) Application priority data: Application No. Country Date
486,081 United States Feb. 27, 1990
518,077 United States May 1 , 1990
Availability of licence: N/A
Language of filing: English