The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 07, 1989
Filed:
Jan. 12, 1987
Chen-Yen Cheng, Albuquerque, NM (US);
Sing-Wang Cheng, Albuquerque, NM (US);
Other;
Abstract
A new vacuum freezing separation process entitled 'Vacuum Freezing Ambient Pressure Melting (VFAPM) Process' and a new apparatus entitled .cent.Sub-Triple Point Vapor Processing Unit' for generating and liquefying a sub-triple point vapor have been introduced. The process is useful in desalination, concentration of industrial solutions, water reuse and pollution abatement. The vapor processing unit can be used in vacuum freezing processes, distillative freezing processes, freeze-drying processes and other processes in which sub-triple point vapors are generated and are to be liquefied. The VFAPM Process is conducted in two processing zones, a vacuum processing zone and an ambient pressure processing zone. A vacuum freezing operation of generating a first vapor (a sub-triple point vapor) and a first condensed mass containing solvent crystals and a two-stage liquefaction of the first vapor are conducted in the vacuum processing zone; a crystal washing operation and a crystal melting operation are conducted in the ambient pressure processing zone. The Sub-Triple Point Vapor Processing Unit is an apparatus for generating a sub-triple point vapor and subjecting the vapor to a two-stage liquefaction operation involving a desublimation operation and a desublimate melting operation. The VFAPM Process is insensitive to corrosion, scale formation and fouling problems. It can handle many chemicals and solutions and it can attain a high degree of concentration of various industrial solutions and polluted solutions.