Preparation method of hydrogenation catalyst

A hydrogenation catalyst and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of affecting catalyst performance, lack of roasting steps, weakening metal - Carrier interaction and other issues to achieve the effect of maintaining performance, improving dispersion effect and good performance

Active Publication Date: 2009-07-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lack of a calcination step will inevitably greatly weaken the metal-support interaction. The initial activity of the catalyst will be high, but as the reaction time prolongs, the active metal will gradually aggregate and the active sites will gradually decrease. In this way, the activity of the catalyst Decrease gradually, affecting the performance of the catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0023] 3. Add in the preparation process of alumina dry rubber powder, such as introducing by co-precipitation or step-by-step precipitation. Then, the catalyst precursor is prepared by extruding the aluminum oxide dry rubber powder, drying and calcining.

[0024] One or several of extrusion aids, adhesives, peptizers, small-pore alumina dry rubber powders and other additives required for catalysts can be added to the above-mentioned alumina dry rubber powder, and the addition amount can be determined according to the preparation Catalyst properties are determined according to the knowledge in the art. The small-pore alumina used is pseudo-boehmite produced by aluminum chloride-ammonia water method, carbonization method or aluminum sulfate method, and SB alumina powder, which is a by-product of Zlegler synthesis reaction, and the like.

[0025] The carrier can be made into various shapes according to different needs, such as balls, tablets or strips, etc. Preferably strips (...

Embodiment 1

[0033] This example introduces the preparation of a catalyst precursor by using pseudo-boehmite dry rubber powder containing silicon and boron. Dry rubber powder containing silicon and boron has a specific surface area of ​​350m 2 / g, the pore volume is 0.90ml / g, the silicon content is 1.32%, and the boron content is 1.58%.

[0034] Weigh 400g of dry rubber powder containing silicon and boron, add 6g of citric acid and 6g of scallop powder, mix well, add 345g of acidic solution, HNO in the acidic solution 3 The concentration is 1.74%, and the rest is distilled water. After rolling for 20 minutes, extrude the strips with a clover orifice plate with a diameter of 1.7mm. Dry at 120°C for 4h and then bake at 500°C for 3h. The prepared carrier note is designated as S1. The prepared support strip S1 was impregnated with a solution containing Mo, Ni, and P, dried at 130°C for 4 hours, and then calcined at 500°C for 2 hours. The prepared catalyst precursor was designated as Z1.

...

Embodiment 2

[0037] This example introduces the preparation of a catalyst precursor by using silicon-containing pseudo-boehmite dry rubber powder. Silicon-containing dry rubber powder has a specific surface area of ​​370m 2 / g, the pore volume is 0.90ml / g, and the silicon content is 2.01%.

[0038] Weigh 300g of silicon-containing dry rubber powder, add 100g of SB powder, add 6g of citric acid and 6 g of squash powder, mix well, add 345g of acidic solution, HNO in the acidic solution 3 The concentration is 1.74%, and the rest is distilled water. After rolling for 20 minutes, extrude the strips with a clover orifice plate with a diameter of 1.7mm. After drying at 120°C for 4h and then calcination at 500°C for 3h, the obtained carrier is marked as S2. The prepared carrier bar S2 was impregnated with a solution containing W, dried at 130°C for 4 hours and then calcined at 500°C for 2 hours, and the prepared catalyst precursor was designated as Z3.

[0039] Weigh 300g of silicon-containing...

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Abstract

The invention provides a method for preparing a hydrogenation catalyst. Active components are introduced by a two-stage method; previously introduced metal components have strong action with a carrier through a roasting step, and subsequently introduced active components have no roasting step and have weak action with the carrier; and during vulcanization and usage of the catalyst, the active metal components having strong action with the carrier can inhibit migration and concentration of the active metals having weak action with the carrier, so the catalyst keeps ideal activity and stability. The catalyst prepared by the method can be used in a hydrotreating process of various distillate oils.

Description

technical field [0001] The invention relates to a method for preparing a hydrogenation catalyst, in particular to a method for preparing a hydrogenation catalyst containing an organic additive. Background technique [0002] Most supported catalysts are prepared by impregnation method, such as various hydrogenation catalysts. When hydrogenation catalysts are prepared by impregnation, the catalyst activity and the dispersion of active metals (such as Mo) on the surface and their relationship with the carrier (such as Al 2 o 3 ) are highly correlated. How to improve the dispersion of active metals on the surface of the support and at the same time weaken the strong metal-support interaction has become the key to the preparation of highly active hydrogenation catalysts. [0003] It is known in the art that the active components of the uncalcined catalyst have higher dispersibility, and the interaction between the active metal of the uncalcined catalyst and the support is rela...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/19B01J23/888B01J23/883C07B35/02C10G45/08
Inventor 杨占林彭绍忠姜虹刘雪玲王继锋王刚
Owner CHINA PETROLEUM & CHEM CORP
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