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Desulfurization method and novel sorbents for same

An adsorbent and sulfur removal technology, which is applied in the direction of solid adsorbent liquid separation, separation method, adsorption purification/separation, etc., can solve problems such as loss of octane number, and achieve the reduction of sulfur content and avoid significant decrease in octane number. Effect

Inactive Publication Date: 2002-11-27
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] It has been found that the lifetime of the sorbent system is extended when the hydrogen content in the desulfurization zone is increased, but this extended activity comes at the expense of octane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment I

[0105] A slurry prepared by mixing 6.5% by weight titanium dioxide, 13.5% by weight zinc oxide and 80% by weight water was spray dried using a Niro spray dryer. The resulting product having an average particle size of 90 µm was calcined at 899°C for 3 hours.

[0106] The zinc titanate product after 100g gained roasting is dissolved in 59.4gNi(NO 3 ) 2 6H 2 O impregnation. The nickel-impregnated zinc titanate was then dried at 300°F for 2 hours and fired at 1175°F for 1 hour.

[0107] The resulting calcined nickel oxide-zinc titanate sorbent was reduced in a reactor at 700°F for 2.5 hr at a total pressure of 15 psia and a hydrogen partial pressure of 15 psi to produce a reduced nickel-zinc titanate solid sorbent in which the The nickel component of the sorbent composition is substantially reduced.

Embodiment II

[0110] The desulfurization ability of the granular nickel-zinc titanate adsorbent prepared in Example I was tested as follows.

[0111] A 1 in quartz tube reactor was charged with the unreduced sorbent of Example I in the amounts indicated below. The solid nickel-zinc titanate sorbent was placed on a frit in the middle of the reactor and reduced with hydrogen as described in Example I. A gaseous cracked gasoline containing about 340 ppm sulfur (parts by weight of sulfur compounds based on the weight of the gaseous cracked gasoline) and about 95 ppm sulfur based on the weight of the gaseous cracked gasoline was pumped upward through the reactor. % by weight thiophenes (eg, alkylbenzothiophenes, alkylthiophenes, benzothiophenes, and thiophenes). The flow rate is 13.4ml / hr. Produces sulfurized solid sorbent and desulfurized gaseous cracked gasoline.

[0112] and get the following result:

[0113] Under the conditions shown in Table 1, the sulfur in gasoline decreased from 340...

Embodiment III

[0118] A slurry prepared by mixing 6.5% by weight titanium dioxide, 13.5% by weight zinc oxide and 80% by weight water was spray dried using a Niro spray dryer. The resulting product having an average particle size of 90 µm was calcined at 899°C for 3 hours.

[0119] The zinc titanate product after 100g gained roasting is dissolved in 59.4gNi(NO 3 ) 2 6H 2 O impregnation. The nickel-impregnated zinc titanate was then dried at 300°F for 2 hours and fired at 1175°F for 1 hour.

[0120] 50 g of the resulting nickel-impregnated zinc titanate sorbent was secondarily impregnated with 29.7 g of nickel nitrate hexahydrate dissolved in 4 g of deionized water heated to 180°F. After the second impregnation, the impregnated sorbent was dried at 300°F for 1 hour and calcined at 1175°F for 1 hour.

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Abstract

Provided is a particulate sorbent composition comprising a zinc titanate support loaded with a promoter metal in a substantially reduced valence state selected from the group consisting of cobalt, nickel, iron, manganese, copper, molybdenum, tungsten, silver, tin and vanadium, or mixtures thereof , for desulfurizing a cracked gasoline or diesel fuel feed stream in a desulfurization zone by contacting said feed stream in a desulfurization zone with a particulate adsorbent composition and then subjecting the resulting low sulfur content The stream is separated from the sulfided sorbent, which is then regenerated and activated before being recycled back to the desulfurization zone.

Description

field of invention [0001] This invention relates to the desulfurization of cracked gasoline and diesel fuel fluid streams. In another aspect, the invention relates to sorbent compositions suitable for desulfurization of cracked gasoline and diesel fuel fluid streams. In yet another aspect, the invention relates to a process for the production of sulfur sorbents for desulfurization from cracked gasoline and diesel fuel fluid streams. Background of the invention [0002] The need for cleaner fuels has led to ongoing worldwide efforts to reduce the sulfur content of gasoline and diesel fuel. Reducing the sulfur content of gasoline and diesel is considered one of the measures to improve air quality, because sulfur in the fuel has an adverse effect on the performance of automobile catalytic converters. The presence of sulfur oxides in automobile engine exhaust inhibits and can irreversibly poison noble metal catalysts in the converter. Exhaust gases from inefficient or poisone...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D15/00B01J20/02B01J20/06B01J20/28B01J20/30B01J20/34B01J21/06B01J23/00B01J23/06B01J37/00B01J37/02B01J37/16C10G25/00C10G29/04C10G29/16
CPCB01J20/02B01J20/06B01J20/2803B01J20/3078B01J20/3204B01J20/3234B01J20/3236B01J21/063B01J23/002B01J23/06B01J37/0045B01J37/0201B01J37/16B01J2523/00C10G25/003C10G2300/104C10G2300/1055C10G2300/202C10G2300/4093C10G2300/703C10G2400/02C10G2400/04B01J2523/27B01J2523/47B01J2523/847B01J20/0225B01J20/28016
Inventor G·P·卡尔
Owner CHINA PETROLEUM & CHEM CORP
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