Selective hydrogenation catalyst and preparation method thereof

A hydrogenation catalyst and selective hydrogenation technology, applied in the direction of selective hydrogenation refining, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve high cracking activity, unsuitable carrier, Reduce liquid yield and other problems, achieve the effect of low carbon deposition, good chemical and thermal stability, and long service life

Active Publication Date: 2011-08-03
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] CN1267187C discloses a silica-alumina containing pseudo-boehmite structure, the carrier silica content is high, and the silicon-containing compound solution is directly or co-currently introduced into the pseudo-boehmite slurry, the purpose It is to increase the four-coordinated aluminum content to increase the acid strength and acid amount of alumina. The

Method used

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  • Selective hydrogenation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0052] Example 1:

[0053] Configuration 2L concentration is 100gAl 2 O 3 / L of sodium metaaluminate solution is placed in the gel forming tank, the temperature of the gel forming tank is controlled to 40℃, and under stirring conditions, 60v% CO 2 +40v% air mixed gas, the flow of carbon dioxide in the mixed gas is 2Nm 3 / h. When the pH value reached 10.5, the mixed gas was stopped, and then aged for 25 minutes to obtain pseudo-boehmite slurry.

[0054] Configuration 4L concentration is 100gAl 2 O 3 / L sodium metaaluminate solution is placed in the gel tank, and then 2L 100gSiO 2 / L of sodium silicate solution, control the temperature of the gel tank to 30℃, and pass in 60v% CO 2 +40v% air mixed gas, CO in the mixed gas 2 The flow rate is 3Nm 3 / h, control the end-point pH to 9.5, and aging for 10 minutes to obtain an amorphous silicon-alumina slurry.

[0055] Under the condition of continuous stirring, add 3L of amorphous silica-alumina slurry to 1L of pseudo-boehmite slurry, control...

Example Embodiment

[0057] Example 2:

[0058] The preparation of amorphous silicon aluminum was carried out according to Example 1.

[0059] Configuration 2L concentration is 150gAl 2 O 3 / L of sodium metaaluminate solution, placed in the gel forming tank, control the temperature of the gel forming tank to 35°C, and pass in a concentration of 70v% CO under stirring conditions 2 +30v% air mixed gas, the flow of carbon dioxide in the mixed gas is 4Nm 3 / h, when the pH value reaches 10.0, stop passing the mixed gas, and aging for 20 minutes to obtain pseudo-boehmite slurry.

[0060] Under the condition of constant stirring, add 2L pseudo-boehmite slurry to 3L amorphous silica alumina slurry, control the mixing temperature at 30℃, age for 15min, filter and wash to Na + The content is less than 0.5% and dried at 120°C for 9 hours to obtain pseudo-boehmite containing amorphous silicon-alumina.

[0061] The pseudo-boehmite containing amorphous silicon and aluminum is mixed and kneaded with nitric acid, lanthanu...

Example Embodiment

[0062] Example 3:

[0063] The preparation of pseudo-boehmite slurry was carried out in accordance with Example 1.

[0064] Configuration 2L concentration is 130gAl 2 O 3 / L sodium metaaluminate solution is placed in the gel tank, and then 2L 80gSiO 2 / L of sodium silicate solution, control the reaction temperature to 20℃, and pass in 50v% CO 2 +50v% air mixed gas, CO in mixed gas 2 The flow rate is 5Nm 3 / h, control the end-point pH to 9.0, and aging for 20 minutes to obtain an amorphous silicon-alumina slurry.

[0065] Under the condition of constant stirring, add 1L pseudo-boehmite slurry and 3L amorphous silica-alumina slurry co-currently into the gel forming tank, control the mixing temperature at 35℃, age for 15min, filter and wash to Na + The content is less than 0.5% and dried at 120°C for 8 hours to obtain pseudo-boehmite containing amorphous silicon-alumina.

[0066] The pseudo-boehmite containing amorphous silicon-alumina is mixed and kneaded with nitric acid, lithium acetat...

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Abstract

The invention provides a selective hydrogenation catalyst. Nickel serves as an active component; silicon-containing alumina serves as a carrier; based on 100% of the total weight of the catalyst, the selective hydrogenation catalyst comprises 10-20wt% of nickel oxide, 0-10wt% of cerium oxide and/or cerium oxide, 0-8wt% of alkali metal and/or alkaline-earth metal oxides and 3.1-36wt% of silicon oxide; the specific surface area of the catalyst is 60-180m2/g; and the pore volume of the catalyst is 0.4-0.7ml/g. The precursor of the carrier of the silicon-containing alumina is pseudo-boehmite containing amorphous silica-alumina, which is prepared by the following steps of: firstly preparing amorphous silica-alumina seriflux and pseudo-boehmite seriflux; mixing and ageing the two seriflux; and performing a post-processing process comprising filtering and drying on the mixture. The catalyst has high hydrogenation activity, high selectivity and good stability, is suitable for the selective hydrogenation of medium-low distillate oil, and is particularly suitable for the selective hydrogenation of unsaturated hydrocarbon such as diene and the like in an oil product.

Description

technical field [0001] The invention relates to a selective hydrogenation catalyst and a preparation method thereof. The catalyst is suitable for the selective hydrogenation of low and medium distillate oils, especially for the selective hydrogenation of diethylenic unsaturated hydrocarbons in oil products. Background technique [0002] In recent years, with the increasingly stringent environmental regulations, the requirements for sulfur content and nitrogen content in oil products have become more and more stringent; at the same time, because the quality of crude oil is getting worse and the content of impurities such as sulfur and nitrogen is getting higher and higher, the The requirements for hydrogen treatment catalysts are also getting higher and higher. For example, when hydrotreating coked diesel oil, higher content of nitrogen compounds, especially basic nitrogen compounds, will be adsorbed on the acidic sites of the catalyst, resulting in a decrease in desulfuriza...

Claims

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Application Information

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IPC IPC(8): B01J23/83C10G45/36
Inventor 钱颖郑云弟孙利民颉伟梁顺琴马好文潘曦竹边虎吴杰龚光碧黄德华常晓昕吕龙刚王书峰柏介军王宗宝
Owner PETROCHINA CO LTD
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