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A-type zeolite molecular sieve and preparation method and application thereof

A zeolite molecular sieve and powder technology, which is applied in the field of A-type zeolite molecular sieve and its preparation, can solve the problems of unerased waste catalysts, such as climate, environment, and negative economic impact, and achieve the effects of reducing production costs and saving energy.

Active Publication Date: 2020-04-17
河北欣芮再生资源利用有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The landfill treatment method only realizes the spatial transfer of spent catalysts, but does not eradicate the negative impacts of spent catalysts on climate, environment, economy, etc.

Method used

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  • A-type zeolite molecular sieve and preparation method and application thereof
  • A-type zeolite molecular sieve and preparation method and application thereof
  • A-type zeolite molecular sieve and preparation method and application thereof

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preparation example Construction

[0020] The present invention relates to a kind of preparation method of A-type zeolite molecular sieve, comprising the following steps:

[0021] (1) First mix the cracking catalytic waste catalyst with sodium hydroxide and grind to obtain powder, then put the powder into a closed container and heat it to 160°C-210°C to activate the reaction for 1h-4h and then cool it down; wherein, the spent catalyst The parts by weight of the sodium hydroxide are 0.7-0.8 parts, and the parts by weight of the sodium hydroxide are 1-2 parts.

[0022] (2) Pour the powder obtained in the step (1) into a crystallization reaction vessel, then add water and stir for 3.5h-4.5h.

[0023] (3) Add silica sol to the solution obtained in the step (2), and stir; wherein, the parts by weight of the water are 5 parts to 22 parts, and the parts by weight of the silica sol are 0.09 parts to 0.1 parts by weight part; the molar ratio of silicon oxide, aluminum oxide, sodium oxide and water in the silica sol is ...

Embodiment 1

[0028] 1. Mix and grind 0.715g of FCC waste catalyst and 1.7g of sodium hydroxide evenly until no obvious sodium hydroxide particles are observed, then add it into a closed activation reaction vessel, the reaction temperature is 160°C and the reaction time is 1 hour. After the activation reaction is completed, statically Set aside to cool.

[0029] 2. Transfer the powdered solid collected in step 1 to a crystallization reaction vessel, add 22 ml of water, and stir evenly under airtight conditions at room temperature for 4 hours.

[0030] 3. Add 0.1g of silica sol to the mixed solution, and the molar ratio of its active ingredients is SiO 2 :Al 2 o 3 :Na 2 O:H 2 O=1.6:1:2:400.

[0031] 4. The mixture obtained in step 2 was subjected to hydrothermal crystallization, the crystallization temperature was 75° C. and the crystallization time was 12 hours.

[0032] 5. The crystallized product was collected by filtration, washing and drying, wherein the pH of the product after wa...

Embodiment 2

[0035] 1. Mix and grind 0.715g of FCC waste catalyst and 0.5g of sodium hydroxide evenly until no obvious sodium hydroxide particles are observed, then add it into a closed activation reaction vessel, the reaction temperature is 200°C and the reaction time is 4 hours. After the activation reaction is completed, statically Set aside to cool.

[0036] 2. Transfer the powdery solid collected in step 1 to a crystallization reaction vessel, add 5.5 ml of water, and stir evenly under airtight conditions at room temperature for 4 hours.

[0037] 3. Add 0.03g of white carbon black to the mixed solution, and the molar ratio of its active ingredients is SiO 2 :Al 2 o 3 :Na 2 O:H 2 O=1.6:1:2:100.

[0038] 4. The mixture obtained in step 2 was subjected to hydrothermal crystallization, the crystallization temperature was 120° C. and the crystallization time was 4 hours.

[0039] 5. Collect the crystallized product by filtering, washing and drying, wherein the pH of the product after...

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Abstract

The invention relates to an A-type zeolite molecular sieve as well as a preparation method and application thereof. The method comprises the following steps: firstly, mixing a cracking catalytic wastecatalyst with sodium hydroxide, grinding to obtain powder, putting the powder into a closed container for activation reaction, then cooling, pouring into a crystallization reaction container, then adding water, and stirring; adding silica sol into the solution; and carrying out hydrothermal crystallization on the product, and sequentially filtering, washing and drying to obtain the A-type zeolitemolecular sieve. According to the preparation method of the A-type zeolite molecular sieve, the FCC waste catalyst is used as a raw material to replace a pure chemical reagent, so that the productioncost of the zeolite molecular sieve is greatly reduced while the problem of treatment of the FCC waste catalyst is solved. The method conforms to the development strategy of circular economy, and considerable economic benefits can be generated. Compared with a traditional high-temperature (600 DEG C or above) raw material activation method, the solid-phase molten alkali raw material activation method with the low temperature (160 DEG C-200 DEG C) saves a large amount of energy.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of spent cracking catalytic catalysts, and in particular relates to a type A zeolite molecular sieve (LTA structure) and its preparation method and application. Background technique [0002] Fluid Catalytic Cracking (FCC) is one of the important processes for processing heavy oil in petroleum into high-value products such as gasoline, diesel, and low olefins. FCC catalyst is the most used catalyst in the conversion process of heavy oil. Because the reaction process is accompanied by factors such as carbon deposition, sintering and heavy metal poisoning, FCC catalysts need to be scrapped and refilled frequently. At present, more than 150,000 tons of FCC waste catalysts are scrapped in my country. In the "National Hazardous Waste List" newly promulgated by the Ministry of Environmental Protection in 2016, the waste FCC catalyst is clearly classified as hazardous waste (hazardous characteris...

Claims

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Application Information

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IPC IPC(8): C01B39/14
CPCC01B39/14
Inventor 闫文付王彬宇于吉红王健羽杨双华王金良魏廉敏孙艺菲王玉璞
Owner 河北欣芮再生资源利用有限公司
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