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Desulfurization and novel sorbents for same

Inactive Publication Date: 2005-03-17
CHINA PETROCHEMICAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0018] The present invention is based upon our discovery that through the utilization of cobalt in a substantially reduced valence state, preferably zero, in a sorbent composition there is achieved a novel sorbent composition which permits the ready removal of sulfur from streams of cracked-gasolines or diesel fuels with a minimal effect on the octane rating of the treated stream.

Problems solved by technology

The presence of oxides of sulfur in automotive engine exhaust inhibits and may irreversibly poison noble metal catalysts in the converter.
While hydrodesulfurization of gasoline can remove sulfur-containing compounds, it can result in the saturation of most, if not all, of the olefins contained in the gasoline.
In removing sulfur from diesel by hydrodesulfurization, the cetane is improved but there is a large cost in hydrogen consumption.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

examples

[0095] The following examples are intended to be illustrative of the present invention and to teach one of ordinary skill in the art to make and use the invention. These examples are not intended to limit the invention in any way.

example i

[0096] A solid reduced cobalt metal sorbent was produced by dry mixing 20.02 pounds of diatomite silica and 25.03 zinc oxide in a mix Muller for 15 minutres to produce a first mixture. While still mixing, a solution containing 6.38 pounds of Disperal alumina (Condea), 22.5 pounds of deionized water and 316 grams of glacial acetic acid were added to the mix Muller to produce a second mixture. After adding these components, mixing continued for an additional 30 minutes. This second mixture was then dried at 300° F. for 16 hours and then calcined at 1175° F. for one hour to form a third mixture. This third mixture was then particularized by granulation using a Stokes Pennwalt granulator fitted with a 50 mesh screen. 200 grams of the resulting granulated mix was then impregnated with 148 grams of cobalt nitrate hexahydrate dissolved in 43 grams of hot (200° F.) deionized water to produce a particulate impregnated mix. The impregnated particulate was dried at 300° F. for one hour and the...

example ii

[0098] The solid reduced cobalt sorbent as prepared in Example I was tested for its desulfurization ability as follows.

[0099] A one inch quartz reactor tube was loaded with the indicated amounts of the sorbent of Example I. This solid reduced cobalt sorbent was placed on a frit in the middle of the reactor. Gaseous cracked-gasoline having about 345 parts per million sulfur by weight of the sulfur-containing compounds based on the weight of the gaseous cracked-gasoline and having about 95 weight percent thiophenic compounds (such as for example, alkyl benzothiphenes, alkyl thiophenes, benzothiophene and thiophene) based on the weight of sulfur-containing compounds in the gaseous cracked-gasoline was pumped upwardly through the reactor. The rate was 13.4 milliliters per hour. This produced sulfurized solid sorbent and desulfurized gaseous cracked-gasoline.

[0100] In Run 1, hydrogen was added to the gasoline feed at a partial pressure of 6.6 psi (out of a total pressure of 15 psi) res...

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Abstract

Particulate sorbent compositions comprising a mixture of zinc oxide, silica, alumina and a substantially reduced valence cobalt are provided for the desulfurization of a feedstream of cracked-gasoline or diesel fuels in a desulfurization zone by a process which comprises the contacting of such feedstreams in a desulfurization zone followed by separation of the resulting low sulfur-containing stream and sulfurized-sorbent and thereafter regenerating and activating the separated sorbent before recycle of same to the desulfurization zone.

Description

RELATED APPLICATIONS [0001] This application is a continuation of U.S. patent application Ser. No. 10 / 255,227, filed Sep. 26, 2002, which is a divisional of U.S. patent application Ser. No. 09 / 689,975, filed Oct. 13, 2000, which is a divisional of U.S. patent application Ser. No. 09 / 382,502, filed Aug. 25, 1999, all incorporated by reference herein.FIELD OF THE INVENTION [0002] This invention relates to the removal of sulfur from fluid streams of cracked-gasolines and diesel fuels. In another aspect this invention relates to sorbent compositions suitable for use in the desulfurization of fluid streams of cracked-gasolines and diesel fuel. A further aspect of this invention relates to a process for the production of sulfur sorbents for use in the removal of sulfur bodies from fluid streams of cracked gasolines and diesel fuels. BACKGROUND OF THE INVENTION [0003] The need for cleaner burning fuels has resulted in a continuing world wide effort to reduce sulfur levels in gasoline and d...

Claims

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Application Information

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IPC IPC(8): B01J20/06B01D15/00B01J20/08B01J20/10B01J20/30C10G25/00C10G25/06C10G29/04C10G29/16
CPCB01D53/02B01J20/3458B01D2253/104B01D2253/106B01D2253/1122B01D2253/1124B01D2253/34B01D2255/20746B01D2255/20792B01D2256/24B01D2257/30B01J20/06B01J20/08B01J20/103B01J20/28016B01J23/80B01J23/94B01J37/0072B01J37/0201B01J37/04B01J37/18B01J38/12B01J2220/42C10G25/003B01J20/3078B01J20/3204B01J20/3236B01J20/0225B01J20/3433B01D53/48C10G2400/02C10G2400/04
Inventor KHARE, GYANESH P.
Owner CHINA PETROCHEMICAL CORP
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