Method for cooling a process gas stream
US4430865A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1982 |
| Grant date | Feb 14, 1984 |
| Priority date | — |
| Expiry date | Dec 20, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/00126
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In a method for cooling a process gas stream with a liquid cryogen, said stream being recycled through a pipe in a closed system comprising a reactor containing at least one pipe wherein, at the initiation of the instant method: PA0 (i) the flowrate of the stream is in the range of about 10,000 scfm to about 350,000 scfm; PA0 (ii) the temperature of the stream is in the range of about 75 degrees F. to about 450 degrees F.; and PA0 (iii) the pressure of the system is in the range of about 150 psig to about 1000 psig; and wherein, at any time during the effectuation of the instant method: PA0 (iv) the temperature differential between any two points in the pipe separated by at least about eight times the nominal pipe diameter is no greater than about 200 degrees F.; and PA0 (v) the minimum temperature of the pipe is at least about minus 20 degrees F., the improvement comprising adjusting the flowrate of the liquid cryogen, which is introduced into the pipe at about the midpoint between the two points referred to in paragraph (iv), above, counter to the direction of the stream, in accordance with the following equations: PA0 (a) when the downstream temperature, T2, is above minus 20.de…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.