Method and apparatus for the coding and low temperature liquefaction of gaseous mixtures
USRE30085E · kind E · reissue
Assignee
Inventor
Key dates
| Filing date | Sep 16, 1974 |
| Grant date | Aug 28, 1979 |
| Priority date | — |
| Expiry date | Sep 16, 1994 |
Classification
- Technology area (CPC —)General
Abstract
.Iadd.17. A process for totally liquefying a gaseous methane-rich feed stream comprising the steps of: PA1 a. supplying said methane-rich feed stream at a superatmospheric pressure and precooling said stream, PA1 b. providing a multicomponent refrigerant, PA1 c. compressing said multicomponent refrigerant to a superatmospheric pressure, PA1 d. cooling said multicomponent refrigerant and phase separating a single vapor fraction and a single liquid fraction from said cooled multicomponent refrigerant, PA1 e. subcooling said liquid fraction in heat exchange with itself after expansion to form a first subcooled liquid fraction, PA1 f. liquefying and subcooling all of said vapor fraction in heat exchange with said first subcooled liquid fraction, and with itself after expansion, to form a second subcooled liquid fraction, and PA1 g. totally liquefying said precooled methane-rich feed stream by further cooling said precooled methane-rich feed stream to at least its liquefaction temperature, at the superatmospheric pressure thereof, solely by progressive heat exchange steps with said first and second subcooled liquid fractions undergoing vaporization, said methane-rich feed stream and sai…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.