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A method for preparing alumina and phosphorus-containing fertilizers by using methanol-to-olefin waste catalyst

A technology of methanol to olefins and waste catalysts, applied in the direction of alumina/aluminum hydroxide, alumina/hydroxide preparation, fertilizer mixture, etc., can solve problems such as not suitable for recycling, and achieve a stable, controllable and operable process Strong, pollution-reducing effect

Active Publication Date: 2021-01-05
陕西好一化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This recycling method can only recycle a small amount of fine powder produced in the catalyst preparation process, and is not suitable for the recycling of spent methanol-to-olefins catalysts

Method used

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  • A method for preparing alumina and phosphorus-containing fertilizers by using methanol-to-olefin waste catalyst
  • A method for preparing alumina and phosphorus-containing fertilizers by using methanol-to-olefin waste catalyst
  • A method for preparing alumina and phosphorus-containing fertilizers by using methanol-to-olefin waste catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) After the waste catalyst is mixed with the decomposition aid calcium peroxide, it is sent into the rotary kiln to be calcined once, cooled, and the primary calcined material is obtained. After the waste catalyst is mixed with the decomposition aid, the decomposition aid accounts for 3% of the total mass of the mixture. %, the calcination temperature for the first calcination is 500°C, the calcination time is 20min, and it is cooled to 75°C after calcination;

[0034] (2) Mix the primary calcined material with ammonium sulfate and send it into the disc tunnel kiln for secondary calcination, and cool to obtain the secondary calcined material. Mixing at a ratio of 1:7, the calcination temperature for the secondary calcination is 380°C, the calcination time is 160min, and cooled to 115°C after calcination;

[0035] (3) adding the secondary calcined material into the sulfuric acid solution with a mass concentration of 10% for leaching, cooling, and filtering to obtain th...

Embodiment 2

[0040] (1) After the waste catalyst is mixed with the decomposition aid calcium peroxide, it is sent into the rotary kiln to be calcined once, and cooled to obtain the primary calcined material. After the waste catalyst is mixed with the decomposition aid, the decomposition aid accounts for 5% of the total mass of the mixture. %, the calcination temperature of the primary calcination is 700°C, the calcination time is 10min, and cooled to 85°C after calcination;

[0041] (2) Mix the primary calcined material with ammonium sulfate and send it into the disc tunnel kiln for secondary calcination, and cool to obtain the secondary calcined material. Mixing at a ratio of 1:9, the calcination temperature for the secondary calcination is 420°C, the calcination time is 130min, and cooled to 125°C after calcination;

[0042] (3) adding the secondary calcined material into the sulfuric acid solution with a mass concentration of 10% for leaching, cooling, and filtering to obtain the filtra...

Embodiment 3

[0047] (1) After the waste catalyst is mixed with the decomposition aid calcium peroxide, it is sent into the rotary kiln to be calcined once, and cooled to obtain a primary calcined material. After the waste catalyst is mixed with the decomposition aid, the decomposition aid accounts for 4% of the total mass of the mixture. %, the calcination temperature for one calcination is 600°C, the calcination time is 15min, and it is cooled to 80°C after calcination;

[0048] (2) Mix the primary calcined material with ammonium sulfate and send it into the disc tunnel kiln for secondary calcination, and cool to obtain the secondary calcined material. Mixing at a ratio of 1:8, the calcination temperature for the secondary calcination is 400°C, the calcination time is 150min, and cooled to 120°C after calcination;

[0049] (3) adding the secondary calcined material into the sulfuric acid solution with a mass concentration of 10% for leaching, cooling, and filtering to obtain the filtrate ...

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Abstract

The invention relates to the technical field of silicon-aluminum-phosphate molecular sieve recycling, and particularly discloses a method for preparing aluminium oxide and phosphorus-containing fertilizer from a methanol-to-olefin waste catalyst. The method comprises the following steps: calcining and decomposing the waste catalyst, and then recovering by adopting an aluminum ammonium sulfate decomposing method to obtain the high-purity aluminium oxide, and performing acidolysis and curing to obtain a silicon-phosphorus-nitrogen compound fertilizer. The method disclosed by the invention is simple in processing steps, is stable and controllable in process, is high in operability, can prepare high-purity Al2O3 of which the purity is higher than 99% and the silicon-phosphorus-nitrogen compound fertilizer of which the content of effective nutrients is larger than 30% synchronously, realizes the recycling of the methanol-to-olefin waste catalyst, reduces the pollution of the waste catalystto the environment, and has great significance for developing coal chemical industry in China.

Description

technical field [0001] The invention relates to the technical field of recovery and utilization of silicon aluminum phosphate molecular sieves, in particular to a method for preparing alumina and phosphorus-containing fertilizers by using spent methanol-to-olefin catalysts. Background technique [0002] Low-carbon olefins (ethylene, propylene) are the most important basic raw materials in the petrochemical industry. At present, their industrial production mainly depends on the petroleum route. Due to the depletion of petroleum resources, the research and development of natural gas-based, coal-based and bio-based routes to synthesize low-carbon olefins has become a hot topic. Among them, the technology of synthesizing low-carbon olefins (Methanol To Olefins, referred to as MTO) through methanol using coal and natural gas as raw materials has attracted much attention, and it is currently a synthetic route with strong technical and economic competitiveness. [0003] The most s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/32C01F7/02C05G1/00
CPCC01F7/02C01F7/32C05G1/00
Inventor 牟保继李宗华赵润莲赵蕊蕊马婧舒刘晓婷
Owner 陕西好一化工科技有限公司
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