Cascaded refrigeration cycles for liquefying low-boiling gaseous mixtures

US3970441A · kind A · utility

Assignee

• Linde GmbH · DE

Inventors

• Volker Etzbach
• Wolfgang Forg · Icking, DE
• Peter Grimm · Seattle, US

Key dates

• Filing date: Jan 13, 1975
• Grant date: Jul 20, 1976
• Expiry date: Jan 13, 1995

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F25J2290/62
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Process for the at least partial liquefaction of a low-boiling gaseous mixture, which is under pressure, wherein the gaseous mixture is precooled in heat exchange with a vaporizing refrigerant, purified during the course of the precooling step, and, after the precooling step, is subjected to a preliminary separation, characterized in that the at least partial liquefaction of the gaseous fraction obtained during the preliminary separation is carried out in heat exchange with a vaporizing multicomponent gas, the partial liquefaction of which takes place by precooling, and the completed liquefaction and subcooling of which takes place in one stage against itself.