PROCESS FOR REMOVING SULFUR FROM GASES

• US 3,634,028 A
• Filed: 10/23/1967
• Issued: 01/11/1972
• Est. Priority Date: 10/27/1966
• Status: Expired due to Term

• Current Assignee: Reinhard Hohne
• Original Assignee: Reinhard Hohne
• Inventors: Hohne, Reinhard
• Primary Examiner(s): Thomas, Earl C.
• Application Number:
  US04/677,157
• Time in Patent Office: 1,541 Days
• Field of Search: 23/2,2.1,3,3.1,225,226 55/73,74 252/411,421,444,445
• US Class Current: 423/222
• CPC Class Codes: B01D 2253/102 Carbon
• CPC Class Codes: B01D 2253/306 Surface area, e.g. BET-specific surface
• CPC Class Codes: B01D 2253/308 Pore size
• CPC Class Codes: B01D 2256/22 Carbon dioxide
• CPC Class Codes: B01D 2257/30 Sulfur compounds
• CPC Class Codes: B01D 2259/40056 Gases other than recycled product or process gas
• CPC Class Codes: B01D 2259/40081 Counter-current
• CPC Class Codes: B01D 2259/4009 using hot gas
• CPC Class Codes: B01D 2259/403 using three beds
• CPC Class Codes: B01D 53/02 by adsorption, e.g. preparative gas chromatography solid sorbent compositions B01J20/00, preparation of inorganic compounds or elements C01
• CPC Class Codes: B01D 53/0462 Temperature swing adsorption
• CPC Class Codes: C10K 1/32 with selectively adsorptive solids, e.g. active carbon
• CPC Class Codes: Y10S 502/517 Sulfur or sulfur compound removal

Abstract

Use of activated carbon; having a steep absorption isotherm, that is carbon having a surface area of about 1,200 to 1,500 square meters per gram, a most frequent (median) pore radius of about 4 to 12 angstroms, a micropore (less than 100-angstrom diameter) volume of about 0.8 cubic centimeters per gram, and a bulk density of up to about 350 grams per liter, as adsorbent for sulfur in sulfur-containing gases; and to regeneration of the adsorbent by treatment thereof with hot, at least about 280* C., inert gases.

Claims

2. The improved process claimed in claim 1, wherein said regeneration is carried out at a temperature of about 380* to 480* C.

3. The improved process claimed in claim 1, wherein said carbon has a bulk density of about 280 to 320 grams per liter.

4. The improved claimed in claim 1, wherein said inert gas is at least one selected from the group consisting of nitrogen, methane, sulfur-free natural gas and mixtures thereof.

5. The improved process claimed in claim 1, wherein said inert gas having desorbed sulfur therein is cooled to precipitate said sulfur therefrom.

6. The improved process claimed in claim 5, wherein said inert gas, relieved of at least part of its sulfur, is recycled to desorption utilization.