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Title: Synthesis of arsenic transition metal sulfides and metal arsenides

Abstract

One of the chief problems in upgrading shale oil is the presence of inherent arsenic which is known to poison downstream catalysts. Highly dispersed transition metal sulfides formed in situ from the decomposition of dithiocarbamate (DTC) complexes of transition metals show excellent potential as dearsenation agents. The authors have studied the reaction of these sulfides with various arsenic compositions and characterized the metal arsenides and arsenic metal sulfides formed as well as the ease of their formation. Thus, the reaction of bis(butyldithiocarbamato)Ni, (NiBuDTC) with model compounds was very facile and gave NiAs, NiAsS, and NiAs2=xSx. In general the effectiveness of the sulfides for dearsenation followed the sequence Ni>Mo{much_gt}Co, while iron sulfides were totally ineffective. Based upon these results, tests were run in autoclaves (as well as a fixed-bed flow-through unit) with NiBuDTC and shale oil having 73 ppm inherent As. Under optimum conditions, dearsenation down to les than 1 ppm was obtained.

Authors:
; ;  [1]
  1. Exxon Research & Development Labs, Baton Rouge, LA (United States)
Publication Date:
OSTI Identifier:
141088
Report Number(s):
CONF-930304-
TRN: 93:003688-0762
Resource Type:
Conference
Resource Relation:
Conference: 205. American Chemical Society national meeting, Denver, CO (United States), 28 Mar - 2 Apr 1993; Other Information: PBD: 1993; Related Information: Is Part Of 205th ACS national meeting; PB: 1951 p.
Country of Publication:
United States
Language:
English
Subject:
40 CHEMISTRY; 04 OIL SHALES AND TAR SANDS; ARSENIDES; CHEMICAL REACTIONS; SHALE OIL; PROCESSING; CARBAMATES; NICKEL SULFIDES; TRANSITION ELEMENT COMPOUNDS; ARSENIC SULFIDES; DITHIOLS; CHEMICAL REACTION YIELD

Citation Formats

Singhal, G H, Brown, L D, and Ryan, D F. Synthesis of arsenic transition metal sulfides and metal arsenides. United States: N. p., 1993. Web.
Singhal, G H, Brown, L D, & Ryan, D F. Synthesis of arsenic transition metal sulfides and metal arsenides. United States.
Singhal, G H, Brown, L D, and Ryan, D F. 1993. "Synthesis of arsenic transition metal sulfides and metal arsenides". United States.
@article{osti_141088,
title = {Synthesis of arsenic transition metal sulfides and metal arsenides},
author = {Singhal, G H and Brown, L D and Ryan, D F},
abstractNote = {One of the chief problems in upgrading shale oil is the presence of inherent arsenic which is known to poison downstream catalysts. Highly dispersed transition metal sulfides formed in situ from the decomposition of dithiocarbamate (DTC) complexes of transition metals show excellent potential as dearsenation agents. The authors have studied the reaction of these sulfides with various arsenic compositions and characterized the metal arsenides and arsenic metal sulfides formed as well as the ease of their formation. Thus, the reaction of bis(butyldithiocarbamato)Ni, (NiBuDTC) with model compounds was very facile and gave NiAs, NiAsS, and NiAs2=xSx. In general the effectiveness of the sulfides for dearsenation followed the sequence Ni>Mo{much_gt}Co, while iron sulfides were totally ineffective. Based upon these results, tests were run in autoclaves (as well as a fixed-bed flow-through unit) with NiBuDTC and shale oil having 73 ppm inherent As. Under optimum conditions, dearsenation down to les than 1 ppm was obtained.},
doi = {},
url = {https://www.osti.gov/biblio/141088}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Dec 31 00:00:00 EST 1993},
month = {Fri Dec 31 00:00:00 EST 1993}
}

Conference:
Other availability
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