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Method for preparing desulfurizer capable of absorbing catalytic cracking gas at high selection

A catalytic cracking gasoline, high-selectivity technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. Reduce sulfur content and other issues to achieve the effect of avoiding secondary sulfide residues, avoiding secondary sulfide residues, and providing sulfur-carrying capacity

Active Publication Date: 2013-07-31
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology can only remove hydrogen sulfide and mercaptan sulfur in FCC gasoline, but cannot greatly reduce the sulfur content, so it cannot meet the requirements of the new standard gasoline

Method used

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  • Method for preparing desulfurizer capable of absorbing catalytic cracking gas at high selection
  • Method for preparing desulfurizer capable of absorbing catalytic cracking gas at high selection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Prepare catalyst of the present invention

[0040] (1) catalyst preparation: 100g silica sol (30wt% solid content), 33.3g aluminum sol (30wt% solid content), 146.9g zinc nitrate, 75.2g nickel nitrate and 19.1g copper nitrate were mixed for 10 minutes, then mixed Add 20g of citric acid to the solution, stir and reflux at 90°C for 6 hours to form a sol; evaporate at a constant temperature for 12 hours to form a xerogel; grind the xerogel into a fine powder, and roast at 500°C to obtain a powder catalyst;

[0041] (2) Catalyst molding: add 90ml of 3wt% dilute nitric acid solution to the powder obtained in step (1), mix it for 15 minutes, roll the ball into a 3mm ball in a granulator, dry at 120°C for 12 hours, and then dry at 500°C Roast for 3 hours;

[0042] (3) Hydrothermal treatment: put the spherical catalyst prepared in step (2) into a tubular reactor, raise the temperature to 500°C in the air under normal pressure, and then change the water vapor treatment at this t...

Embodiment 2

[0045] Prepare other several catalysts B-F by the method of embodiment 1, difference is to change active component and basic metal oxide type and content, be respectively B (nickel 15wt%, cobalt 5wt%, zinc oxide 40wt%, silicon aluminum oxide material content is the balance), C (nickel 6wt%, cobalt 12wt%, zinc oxide 40wt%, silicon aluminum oxide content is the balance), D (nickel 38wt%, cobalt 1wt%, manganese oxide 30wt%, silicon aluminum oxide material content is the balance), E (nickel 15wt%, copper 5wt%, calcium oxide 40wt%, silicon aluminum oxide content is the balance), F (nickel 15wt%, cobalt 5wt%, magnesium oxide 40wt%).

Embodiment 3

[0047] Catalyst G was prepared according to the method of Example 1, except that the carrier (zinc oxide 40wt%) modified by basic oxide was first prepared, and then the bimetallic active component (nickel 15wt%, cobalt 5wt%) was introduced by impregnation method, Carry out hydrothermal treatment by the method for step (3) then.

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Abstract

The invention discloses a method for preparing desulfurizer capable of absorbing catalytic cracking gasoline at high selection, wherein catalyst is formed by loading the active components, such as nickel, cobalt and copper, on alkaline-metal modified silicon-aluminum composite carrier. The method for preparing the catalyst comprises two processes: the first process is to prepare the soluble precursor of each component and complexing agent as colloidal sol, dry, roast, form and process through hot water to obtain the catalyst; and the second process is to adopt the sol-gel method to prepare analkaline composite oxide carrier, then adopt a soaking method to introduce the first active component Ni and one of the second active components Co, Cu and Sn, finally process through the hot water to obtain the catalyst. The method has simple process, the large specific surface area of the catalyst is large, and the activity is stable. The method has advantages of high desulfurizing depth, good selection and little loss of octane value, so the method can be suitably applied to the desulfurization process of the catalytic cracking gasoline.

Description

technical field [0001] The invention relates to the technical field of ultra-clean oil production, and relates to a method for preparing a highly selective adsorption desulfurizer for catalytic cracking gasoline. Background technique [0002] Organic sulfur compounds in vehicle fuels generate SO during combustion x , not only will form acid rain, but may also cause the poisoning of the precious metal catalyst in the three-way catalytic converter of automobile exhaust, and reduce the catalyst's ability to reduce the pollutants HC, CO and NO x Transformation, resulting in aggravation of environmental pollution; In addition, SO x Also corrodes engine parts. Therefore, countries around the world have put forward more and more strict requirements on the standards of automotive fuel oil, especially the sulfur content of gasoline. California's 1996 gasoline sulfur content has been reduced to 30μg / g. my country's current gasoline product standard GB 17930-2006 "Motor Gasoline" s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/80B01J23/889B01J20/08C10G45/06
Inventor 张景成南军于海斌耿姗曲晓龙张玉婷刘新普石芳杨建国
Owner CHINA NAT OFFSHORE OIL CORP
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