Hydrofining catalyst and preparation method thereof

A hydrogenation refining and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve difficult molding, poor amorphous silica-alumina peptization, weak acidity of pure alumina carrier, etc. problems, achieve high acidity, good chemical stability and thermal stability, high hydrogenation activity and high desulfurization performance

Active Publication Date: 2012-01-18
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to provide a catalyst with high hydrogenation activity and good stability and a preparation method thereof. The catalyst carrier precursor is pseudo-boehmite containing amorphous silica-alumina. The present invention solves the problem of amorphous silica-alumina peptization Disadvantages such as poor, difficult to form and weak acidity of pure alumina carrier

Method used

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  • Hydrofining catalyst and preparation method thereof
  • Hydrofining catalyst and preparation method thereof
  • Hydrofining catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Configure 2L concentration as 100gAl 2 o 3 / L of sodium metaaluminate solution is placed in the glue tank, the temperature of the glue tank is controlled at 40°C, and 60v% CO is introduced under stirring conditions. 2 The mixed gas of +40v% air, the flow rate of carbon dioxide in the mixed gas is 2Nm 3 / h. When the pH value reaches 10.5, stop feeding the mixed gas, and then age for 25 minutes to obtain pseudo-boehmite slurry.

[0052] Configuration 4L concentration is 100gAl 2 o 3 / L of sodium metaaluminate solution is placed in the gel tank, then add 2L 100gSiO 2 / L of sodium silicate solution, control the temperature of the glue tank at 30°C, and feed 60v% CO 2 Mixed gas of +40v% air, CO in the mixed gas 2 The flow rate is 3Nm 3 / h, the pH at the end point was controlled to be 9.5, and the amorphous silicon-aluminum slurry was obtained by aging for 10 minutes.

[0053] Under the condition of constant stirring, add 3L amorphous silica-alumina slurry to 1L pseu...

Embodiment 2

[0056] The preparation of amorphous silica-alumina slurry was carried out according to Example 1.

[0057] Configure 2L concentration of 120gAl 2 o 3 / L of sodium metaaluminate solution, placed in the gel tank, the temperature of the gel tank is controlled at 35°C, and the concentration of 70v% CO is introduced under stirring conditions. 2 The mixed gas of +30v% air, the flow rate of carbon dioxide in the mixed gas is 4Nm 3 / h, stop feeding the mixed gas when the pH value reaches 10.0, and age for 25 minutes to obtain pseudo-boehmite slurry.

[0058] Under the condition of constant stirring, add 2L pseudo-boehmite slurry into 1.5L amorphous silicon-alumina slurry, control the mixing temperature at 40°C, age for 12min, 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 silica-alumina.

[0059] Mix and knead pseudo-boehmite containing amorphous silicon-alumina with phosphoric acid, magnesium ...

Embodiment 3

[0061] The preparation of the pseudo-boehmite slurry was carried out according to Example 1.

[0062] Configure 2L concentration of 130gAl 2 o 3 / L sodium metaaluminate solution is placed in the gel tank, and then add 2L 80gSiO 2 / L of sodium silicate solution, control the reaction temperature at 20°C, and feed 50v% CO 2 Mixed gas of +50v% air, CO in the mixed gas 2 The flow rate is 5Nm 3 / h, the pH at the end point is controlled to be 9.0, and the amorphous silicon-aluminum slurry is obtained by aging for 20 minutes.

[0063] Under the condition of constant stirring, add 1L of pseudo-boehmite slurry and 3L of amorphous silicon-alumina slurry into the gel forming tank, control the mixing temperature at 35°C, age for 15min, filter and wash until Na + The content is less than 0.5%, and dried at 120°C for 8 hours to obtain pseudo-boehmite containing amorphous silica-alumina.

[0064] Mix and knead pseudo-boehmite containing amorphous silicon-alumina with phosphoric acid, li...

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Abstract

The invention relates to a hydrofining catalyst and a preparation method thereof. The invention is characterized in that: in the catalyst, silicon-containing alumina is taken as a carrier, cobalt, molybdenum and nickel are taken as active ingredients, and phosphorus and alkali metals and/or alkali earth metals are taken aids; the catalyst comprises the following components in percentage by weight: 1-4 percent of nickel oxide, 14-20 percent of molybdenum oxide, 1-6 percent of cobalt oxide, 0-5 percent of phosphorus oxide, 0-4 percent of alkali metal and/or alkali earth metal oxide and 3.1-33.6percent of silicon oxide; the specific surface area of the catalyst is 210-290 m<2>/g; and the pore volume is 0.55-0.78 ml/g. A silicon-containing alumina carrier precursor is pseudoboehmite which contains amorphous silica-alumina, and is obtained by preparing amorphous silica-alumina slurry and pseudoboehmite slurry, mixing the two types of slurry, aging, filtering, drying and the like. The catalyst has high hydrogenation activity and high stability, and is suitable for hydrofining of distillate oil.

Description

technical field [0001] The invention relates to a hydrofinishing catalyst and a preparation method thereof, in particular to a preparation method of a hydrofinishing catalyst carrier precursor. 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 refining catalysts are also getting higher and higher. For example, when coking diesel oil is subjected to hydrofining treatment, higher content of nitrogen compounds, especially basic nitrogen compounds, will be adsorbed on the acidic sites of the catalyst, resulting in a decrease in the desulfurization and denitrification activity of the catalyst, while improving the removal of impuri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/19C10G45/08
Inventor 王廷海孙利民郑云弟梁顺琴吴杰常晓昕钱颖王宗宝康宏敏吕龙刚黄德华马好文向永生王书峰柏介军
Owner PETROCHINA CO LTD
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