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Adsorption agent for reducing sulphur content of catalytic cracking production

A catalytic cracking and adsorbent technology, applied in the petroleum industry, refined hydrocarbon oil, etc., can solve the problems of limited sulfur content reduction, low sulfur content reduction, etc., and achieve sulfur content reduction, high desulfurization capacity, and low sulfur content Effect

Active Publication Date: 2008-12-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The above desulfurization additives all promote the decomposition of thiophene sulfur into H under the atmosphere of the riser. 2 The hydrogen transfer reaction of S occurs, but affected by the sulfur content of the raw material, the properties of the catalyst, and the depth of conversion, the reduction of the sulfur content in the catalytic cracking process is currently limited. FCC Diesel Sulfur Reduction Even Lower

Method used

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  • Adsorption agent for reducing sulphur content of catalytic cracking production
  • Adsorption agent for reducing sulphur content of catalytic cracking production

Examples

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preparation example Construction

[0040] The preparation of carrier sol of the present invention is as follows:

[0041] The main raw materials of the carrier used in this embodiment are as follows:

[0042] 1 # Carrier: 10 kilograms of pseudo-boehmite (solid content is 64% by weight, industrial product of Shandong Zibo Aluminum Factory, the same below);

[0043] 2 # Carrier: 10 kg of pseudo-boehmite+1.0 kg of silica sol (solid content is 25% by weight, produced by Qingdao Lifan Chemical Factory, the same below);

[0044] 3 # Carrier: 4 kilograms of pseudo-boehmite+6 kilograms of kaolin (solid content is 73% by weight, produced by Suzhou China Clay Company);

[0045] 4 # Carrier: 5 kg of pseudoboehmite + 5.2 kg of silica sol + 0.1 kg of hydrated zirconium oxychloride (35% by weight of zirconium oxychloride, produced by Shandong zirconium oxychloride factory);

[0046] 5 # Carrier: 8 kg of 13X powdered molecular sieve (silicon-aluminum ratio of 2.6 to 3.0, produced by Wuxi Rongdeli Molecular Sieve Factor...

Embodiment 1～4

[0050] Examples 1-4 illustrate the composition and preparation method of the adsorbent with a single metal oxide as the active component.

[0051] Weigh commercially available Zn(NO 3 ) 2 6.98 kg, Mn(CH 3 COO) 2 2.74 kg, CuSO 4 0.50 kg with FeCl 2 0.13 kg, each made into an aqueous solution with a metal ion concentration of 8mol / L, add ammonia water with a concentration of 4mol / L at room temperature, maintain pH = 8-9, stir continuously until the precipitation is complete, then raise the temperature to 70°C and place it for aging for 0.5 Hour. Filtrate, wash the filter cake until there is no acid ion, and obtain precipitates of Zn, Mn, Cu and Fe metal hydroxides respectively.

[0052] Use 4 kg of decationized water to beat the precipitate of the above-mentioned metal hydroxide, then add 20 kg of one of the above-mentioned carrier sols and stir evenly, leave it to age at 75°C for 1 hour, and keep the pH=2~4, Cool down to 60°C, spray dry and shape, wash to remove free Na...

Embodiment 5～8

[0055] Examples 5-8 illustrate the composition, preparation method and application of the adsorbent with two kinds of metal oxides as active components.

[0056] Cu(NO 3 ) 2 with Mn(NO 3 ) 2 , Cu(NO 3 ) 2 with Fe(NO 3 ) 3 , Fe(NO 3 ) 3 with Mn(NO 3 ) 2 , Fe(NO 3 ) 3 with Zn(NO 3 ) 2 Weigh 3.74, 2.79, 2.91, and 1.62 kg of the mixture according to the metal molar ratios of 0.1:1, 0.5:1, 1:1, and 5:1, respectively, and make an aqueous solution with a metal ion concentration of 4mol / L, and add a concentration of 2mol / L ammonia water, maintain pH = 9, keep stirring until the precipitation is complete, then raise the temperature to 80°C and leave it to age for 2 hours. Filtrating and washing the filter cake until there is no acid ion to prepare Cu-Mn, Cu-Fe, Fe-Mn and Fe-Zn double metal hydroxide mixtures respectively.

[0057] Use 7 kg of decationized water to beat the mixture of the above-mentioned double hydroxides, then add 20 kg of one of the above-mentioned car...

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Abstract

An absorbent for reducing sulfur content of catalytic cracking product comprises an active component accounting for, calculated by oxide, 5 to 50wt percent of the total amount of the absorbent, and carrier in balance, wherein the active component is active metal oxide; the active metal is selected from one or more of Mn, Fe, Cu, and Zn; and the carrier is selected from one or more of silicon oxide, aluminum oxide, zirconium oxide, titanium oxide, amorphous silica-alumina, natural porous carrier material and molecular sieve. During processing petroleum material, the absorbent and the method can achieve higher desulfurization capacity while maintaining the prior catalysis activity and selectivity of the catalytic cracking catalyst in comparison with catalytic cracking method without absorbent, so that the catalytic cracking product has lower sulfur content. The catalytic cracking system with the absorbent can improve the desulfurization rate of gasoline above 70 percent, the desulfurization rate of cracking up to 90 percent and the desulfurization rate of diesel above 30 percent.

Description

technical field [0001] The invention belongs to an adsorbent for reducing the sulfur content of catalytic cracking products and its preparation and application. Background technique [0002] As people pay more and more attention to environmental protection, the restrictions on sulfur content in hydrocarbon oil are becoming more and more stringent. Taking my country's gasoline standard as an example, the national standard for motor gasoline (GB17930-1999) formulated in 1999 required that the sulfur content in gasoline should be less than 800 μg / g, and it was implemented nationwide on January 1, 2003; to keep pace with the world It is expected to implement the Euro IV emission standard in 2008, and the sulfur content of gasoline is required to be lower than 50μg / g. More than 90% of the sulfur in finished gasoline comes from catalytic cracking (FCC) gasoline. Therefore, how to remove sulfur compounds in FCC gasoline has become the focus of gasoline desulfurization. [0003] A...

Claims

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Application Information

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IPC IPC(8): C10G25/00C10G25/09
Inventor 唐津莲许友好徐莉
Owner CHINA PETROLEUM & CHEM CORP
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