Selective hydrodesulfurization catalyst and preparation method thereof

A hydrodesulfurization and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as long processing time, achieve small RON loss, good desulfurization activity, and reduce olefin polymerization. Effect

Active Publication Date: 2018-01-16
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the process of synthesizing the ternary hydrotalcite-like precursor, hy

Method used

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  • Selective hydrodesulfurization catalyst and preparation method thereof
  • Selective hydrodesulfurization catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0048] Example 1

[0049] The preparation of this example includes: based on the total weight of the catalyst, 5% CoO, 10% MoO 3 , 2%B 2 O 3 , 1%P 2 O 5 , 1%K 2 O, 5%ZnO-76%Al 2 O 3 Catalyst A.

[0050] Dissolve 800g of zinc nitrate in 4L of water to prepare a zinc-containing solution, and dissolve 120g of sodium metaaluminate and 120g of sodium carbonate in 1.7L of water to prepare an aluminum-containing solution. Take 2L of zinc-containing solution, control the temperature of the system to 60°C, add the aluminum-containing solution dropwise to it until the pH value reaches 9, stop the dropwise addition of the aluminum-containing solution, add the remaining 2L of the zinc-containing solution dropwise into the mixing system, and continue to dropwise add the aluminum-containing solution. When the pH value of the aluminum solution reaches 9, the total titration time is 4h. The obtained mixture was aged at 85°C for 4h, cooled and washed to neutrality, dried at 120°C for ...

Example Embodiment

[0054] Example 2

[0055] The preparation of this example includes: based on the total weight of the catalyst, 4% CoO, 12% MoO 3 , 2.5%B 2 O 3 , 1.6%P 2 O 5 , 1.3%K 2 O, 15.6%ZnO-63%Al 2 O 3 Catalyst B.

[0056] The preparation method of the composite oxide carrier is the same as that in Example 1, the difference is that when the composite oxide carrier is prepared, the sample amount of zinc oxide is 26g, and the dry powder of alumina is 90g.

[0057] Then weigh 4.44 g of boric acid, 1.95 g of potassium phosphate, and 1.31 g of phosphoric acid and dissolve them in 56 g of distilled water to prepare an auxiliary impregnation solution. It was left to age at room temperature for 6 hours, dried at 140°C for 6 hours, and calcined at 650°C for 8 hours to obtain the modified composite oxide carrier.

[0058] Weigh 15.5g of cobalt nitrate and 14.7g of ammonium heptamolybdate, dissolve them in a mixture of 40g of 25% concentrated ammonia water and 30g of distilled water, complet...

Example Embodiment

[0059] Example 3

[0060] The preparation of this example includes: based on the total weight of the catalyst, 5% CoO, 10% MoO 3 , 2%B 2 O 3 , 1%P 2 O 5 , 1%K 2 O, 20%ZnO-61%Al 2 O 3 the catalyst C.

[0061] The preparation method is the same as in Example 1, the difference is that when the composite oxide carrier is prepared, the sample amount of zinc oxide is 40g, and the dry powder of alumina is 96g.

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Abstract

The invention relates to a selective hydrodesulfurization catalyst. The catalyst comprises, by mass, 3-5% of CoO as an active component, 10-13% of MoO3 as an active component, 2-3% of B203 as a carrier modification aid, 1-2% of P2O5 as a carrier modification aid, 1-1.5% of K2O as a carrier modification aid and 75.5-83% of a composite oxide carrier. The catalyst carriers comprise a zinc aluminate spinel-containing zinc oxide-alumina composite oxide prepared by nonconstant pH alternating titration. The catalyst has good desulfurization selectivity and stability.

Description

technical field [0001] The invention relates to a selective hydrodesulfurization catalyst and a preparation method thereof, in particular to a selective hydrodesulfurization catalyst with a zinc oxide material containing zinc-aluminum spinel as a carrier and a preparation method thereof. Background technique [0002] In recent years, with the rapid increase of the number of motor vehicles in cities in various countries, the air pollution caused by vehicle exhaust emissions has become increasingly serious. Controlling the air quality of large and medium-sized cities has become an urgent need to improve the quality of life of people in various countries and ensure the sustainable development of the national economy. solved problem. [0003] With the implementation of China’s National IV Clean Gasoline Standard on January 1, 2014, the sulfur content in gasoline is required to be reduced to 50 μg / g, and by the end of 2016, China will implement a more stringent National V Clean G...

Claims

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Application Information

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IPC IPC(8): B01J27/19C10G45/08
Inventor 向永生崔彦君吴杰王廷海高源常晓昕李自夏王学丽姚文君李景锋刘蕾
Owner PETROCHINA CO LTD
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