Gasoline selective desulfurization catalyst

A desulfurization catalyst and selective technology, applied in molecular sieve catalysts, physical/chemical process catalysts, petroleum industry, etc., can solve problems such as increased olefin saturation rate, low desulfurization rate, and low mechanical strength

Inactive Publication Date: 2010-09-29
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] US 4032632 discloses a MgO-supported cobalt-molybdenum catalyst, which can retain some olefins when used for FCC gasoline desulfurization, thereby reducing the decline in octane number, but the desulfurization rate is low and the mechanical strength is not high
[0006] CN 1335361A discloses a FCC gasoline selective desulfurization catalyst and its preparation method, which has better selectivity than the traditional hydrodesulfurization method, when the desulfurization rate is 70%, the olefin saturation rate is 16%, and the octane number loss of the research method is 2.9 unit, but when the desulfurization rate is further increased, the olefin saturation rate will increase accordingly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] SiO 2 The SAPO-11 molecular sieve of 12wt% is mixed with silica sol, and in the carrier, the mass ratio of the molecular sieve and the silicon dioxide contained in the binder is 8.5: 1.5, adding 2.5% of the scallops accounted for the dry basis weight of the carrier The powder is kneaded and extruded into strips, dried and roasted to obtain a shaped carrier.

[0030] Using ammonium nitrate aqueous solution as the exchange agent, ion-exchange the formed carrier, and turn it into a hydrogen-type sample after roasting; impregnate the above-mentioned carrier with Mg(NO 3 ) 2 and Ca(NO 3 ) 2 solution, the amount of immersion Mg and Ca accounted for 1.5% and 0.2% of the catalyst weight in terms of its oxides, dried, and roasted; The content in the catalyst is CoO 0.5%, MoO 3 6.0%, dry, and bake at 540°C for 3 hours.

[0031] At a reaction temperature of 260°C, a pressure of 2.0MPa, and a space velocity of 3.0h -1 1. Under the condition of hydrogen-to-oil ratio of 300, ...

Embodiment 2

[0033] SiO 2 1.8wt% SAPO-5 molecular sieve is mixed with alumina in a mass ratio of 5:5, and after adding 3.0% of the dry weight of the carrier and nitric acid of 4% by dry weight, kneading and extruding , dried and calcined to obtain a molded carrier;

[0034] Use ammonium nitrate aqueous solution as an exchange agent to carry out ion exchange on the above-mentioned formed carrier, and turn it into a hydrogen-type sample after roasting; impregnate the above-mentioned carrier with Mg(NO 3 ) 2 and Ce(NH 4 ) 2 (NO 3 ) 6 solution, the amount of immersed Mg and Ce is MgO, CeO2 accounted for 3.0% and 1.0% by weight of the catalyst, dried, and roasted; then, the above samples were impregnated with cobalt nitrate and ammonium molybdate solutions by equal impregnation method, and the contents of cobalt and molybdenum in the catalyst were respectively CoO4. 0%, MoO 3 6.0%, dry, and bake at 520°C for 4 hours.

[0035] At a reaction temperature of 280°C, a pressure of 2.2MPa, an...

Embodiment 3

[0037] APO-11 molecular sieve is mixed with silica sol, and the mass ratio of molecular sieve and silica sol is 6:4, and 2.5% of the dry basis weight of the carrier is added with scallop powder, kneaded and extruded to form, dried and roasted to obtain molding carrier.

[0038] Using ammonium nitrate aqueous solution as an exchange agent, ion-exchange the above-mentioned formed carrier, and turn it into a hydrogen-type sample after roasting; impregnate the above-mentioned carrier with Ca(NO 3 ) 2 and La(NO 3 ) 3 solution, the amount of Ca and La immersed in CaO and La 2 o 3 accounted for 0.3% and 1.5% by weight of the catalyst, dried, and roasted; then, the above-mentioned samples were immersed in cobalt nitrate and ammonium molybdate solutions by equal impregnation method, and the contents of cobalt and molybdenum in the catalyst were respectively CoO 3.5% in terms of oxides. %, MoO 3 15.0%, dry, and bake at 560°C for 2 hours.

[0039] At a reaction temperature of 240...

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PUM

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Abstract

The invention aims to provide a gasoline selective desulfurization catalyst, and particularly relates to an FCC gasoline selective desulfurization catalyst. The catalyst is prepared by mixing a molecular sieve and a binder, forming the mixture to obtain a carrier and loading active metal ingredient and alkaline metal and/or rare-earth metal to the carrier, wherein the molecular sieve in the carrier is SAPO and/or APO molecular sieve; the binder is aluminum oxide or silicon dioxide; the active ingredient is cobalt-molybdenum composite metal and accounts for 6.5 to 20 weight percent of the catalyst, the alkaline metal and/or the rare-earth metal ingredient account(s) for 0.05 to 8.0 weight percent of the catalyst, and the balance is the carrier; and the relative mass ratio of the molecular sieve to the binder in the carrier is (5-9):(1-5). The catalyst has high hydrodesulfurization activity and selectivity and low olefin saturation ratio when gasoline with low sulfur content is produced by hydrodesulfurization of all fractions of catalytic gasoline, particularly heavy fractions.

Description

technical field [0001] The invention relates to the technical field of clean fuel production in petrochemical industry, in particular to a selective hydrodesulfurization catalyst for producing clean gasoline with low sulfur content by hydrodesulfurization of FCC gasoline. Background technique [0002] With the continuous development of the world economy, the acceleration of urbanization and the continuous improvement of people's living standards, vehicle exhaust has become one of the main sources of air pollution. With the increasing attention to environmental issues, in order to protect the environment on which human beings depend, governments of various countries have formulated stricter environmental protection regulations. my country has implemented the National III gasoline standard on January 1, 2010, and the sulfur content in gasoline has been reduced to below 150 μg / g; Beijing and other places have implemented the National IV gasoline standard since 2008, and it will...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/85B01J29/83C10G45/12
Inventor 朱向学徐龙伢陈福存谢素娟刘盛林安杰王清遐
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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