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# United States Patent [191 

# Heinzelmann et al. 

# [54] ABSORBENT COMPOSITION CONTAINING A SEVERELY HINDERED AMINO COMPOUND AND AN AMINE SALT AND PROCESS FOR THE ABSORPTION OF H2S USING THE SAME 

[75] Inventors: Fred J. Heinzelmann, Fanwood, N.J.; Noah S. Rothblatt, New York, N.Y.; James P. Glass, Jr.; Geoffrey R. Say, both of Baton Rouge, La.; George R. Chludzinski, South Orange, N.J.; Guido Sartori; W. S. Winston Ho, both of Annandale, N.J. 

[73] Assignee: Exxon Research and Engineering Co., Florham Park, N.J. 

[21] Appl. No.: 771,515 

[22] Filed: Aug. 30, 1985 

[51] Int. Cl. 4 ....................... corn 17/16; C0lB 31/20; C09K 3/00 

[52] U.S. CI . .................................... 423/228; 423/226; 423/229; 423/220; 252/189; 252/190; 252/188.28; 564/503; 564/505; 564/508; 55/68 

[58] Field of Search ............... 423/226, 228, 220, 229, 423/223; 55/73, 68; 252/189, 190, 188.28; 564/508, 505, 503 

<img src='content_image/921780.jpg'>

# [11] Patent Number: 4,618,481 

# [45] Date of Patent: Oct. 21, 1986 

## [56] References Cited 

## U.S. PATENT DOCUMENTS 

<img src='content_image/921774.jpg'>

## FOREIGN PATENT DOCUMENTS 

0134948 6/1984 United Kingdom . 

Primary Examiner-John Doll 

Assistant Examiner-Robert L. Stoll 

Attorney, Agent, or Firm-Marthe L. Gibbons 

## [57] ABSTRACT 

An alkaline absorbent composition comprising a se› verely hindered amino compound and an amine salt is provided. A process for the removal of H2S from fluid mixtures using this absorbent composition to produce a very low level of H2S in the treated fluid is also pro› vided. The process is also suited for the selective re› moval of H2S from fluid mixtures comprising H2S and CO2. 

## 28 Claims, 4 Drawing Figures 

