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Catalyst forming method

A molding method and catalyst technology, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problems of catalyst activity reduction, corrosion, destruction, etc., and achieve the effect of avoiding activity reduction.

Active Publication Date: 2018-06-12
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in the prior art, pseudo-boehmite and nitric acid are usually used as binders in the molding process of catalysts, which can make catalyst powders well shaped and the shaped catalysts have high mechanical strength, but Nitric acid is a strong acid with strong oxidizing and corrosive properties, which will corrode and destroy the active sites of the catalyst, and high-temperature calcination is required to eliminate nitric acid after molding, which leads to sintering of some catalysts and further destroys the active sites of the catalyst , and destroy the pore structure of the catalyst after molding, reducing the activity of the catalyst after molding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 1. Fully mix 200g of nickel-based catalyst powder and 10g of scallop powder.

[0049] 2. Add 100g of 50% alkaline silica sol and mix thoroughly again to obtain wet dough.

[0050] 3. Put the wet dough into extruder and dry at 100°C for 24 hours.

[0051] 4. Crushing and sieving.

Embodiment 2

[0053] 1. Fully mix 200g of nickel-based catalyst powder and 10g of scallop powder

[0054] 2. Add 100g of 50% alkaline silica sol and mix thoroughly again.

[0055] 3. Then add 80 g of 50% starch solution and mix for the third time.

[0056] 4. Finally, add 20 g of ammonium carbonate and mix for the fourth time to obtain a wet dough.

[0057] 5. Put the wet dough into extruder and dry at 100°C for 24 hours.

[0058] 6. Crushing and sieving.

Embodiment 3

[0060] 1. Fully mix 200g nickel-based catalyst powder and 6g magnesium stearate

[0061] 2. Add 200g of 30% alkaline silica sol and 100g of 30% alkaline aluminum sol and mix thoroughly again.

[0062] 3. Then add 20g 30% starch solution and 20g 50% PEG solution for the third mixing

[0063] 4. Finally, 30 g of ammonium bicarbonate and 30 g of urea were added for the fourth mixing to obtain a wet dough.

[0064] 5. Put the wet dough into extruder and dry at 100°C for 24 hours.

[0065] 6. Crushing and sieving.

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Abstract

The invention provides a catalyst molding method, which belongs to the field of catalysts. The catalyst shaping method does not destroy the active sites of the catalyst during the catalyst shaping process, and can avoid reducing the catalytic activity of the shaped catalyst. The catalyst molding method comprises the following steps: mixing the catalyst powder with a basic binder to obtain a wet dough, wherein the basic binder includes at least one of alkaline silica sol and alkaline aluminum sol ; The wet dough is subjected to molding treatment. The invention can be used for catalyst shaping.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a catalyst shaping method. Background technique [0002] The solid catalyst needs to have a specific shape and size to adapt to the catalytic reactor during actual use. Therefore, the solid catalyst is usually shaped to obtain a specific shape and size before actual use, and the shaping of the catalyst is related to the activity of the catalyst. The close connection has a great influence on the catalytic activity of the catalyst, so the shaping treatment of the catalyst is very important in the preparation of the catalyst. [0003] There are many influencing factors involved in the catalyst molding process, among which the binder used in the molding process often has an important impact on the subsequent catalyst performance. For example, in the prior art, pseudo-boehmite and nitric acid are usually used as binders in the molding process of catalysts, which can make catalyst powders wel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J37/00
Inventor 赵伟武斌王俊美
Owner ENN SCI & TECH DEV