Patent ID: 6041620
Filing Date: 2000-03-28
Classification: C09K,F25B,F25J

Abstract:
A method for liquefying an industrial gas comprising:(A) compressing an industrial gas, cooling the compressed industrial gas to produce cooled industrial gas, turboexpanding a first portion of the compressed, cooled industrial gas to generate refrigeration, and at least partially condensing a second portion of the compressed, cooled industrial gas by indirect heat exchange with the turboexpanded first portion to produce liquefied industrial gas;(B) compressing a multicomponent refrigerant fluid comprising at least two components, cooling the compressed multicomponent refrigerant fluid, expanding the compressed, cooled multicomponent refrigerant fluid to produce refrigeration, and warming the refrigeration bearing expanded multicomponent refrigerant fluid by indirect heat exchange with said cooling compressed industrial gas; and(C) recovering liquefied industrial gas as product.