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Method of preparing Y molecular sieve by waste MTP catalyst and application of waste MPT catalyst

A catalyst and molecular sieve technology, which is applied in the directions of fauhhedral crystalline aluminosilicate zeolite, crystalline aluminosilicate zeolite, etc., can solve the problems of reduced MTP catalyst activity, waste of silicon and aluminum species, complicated regeneration process, etc., and achieves simplified steps, The effect of saving resources and saving production costs

Active Publication Date: 2019-03-19
SHANGHAI NOVEL CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The regeneration process is complicated, and the activity of the MTP catalyst is reduced; direct landfill not only leads to a large waste of silicon and aluminum species, but also occupies a large amount of land resources

Method used

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  • Method of preparing Y molecular sieve by waste MTP catalyst and application of waste MPT catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1 waste MTP catalyst prepares Y molecular sieve

[0040] In this example, the silicon / aluminum molar ratio of the spent MTP catalyst is 2, and the coke formation rate is 4%. The method for preparing Y molecular sieve by waste MTP catalyst comprises the steps:

[0041] (1), take 40g of waste MTP catalyst fine powder and add 200g of concentration into 5mol / L sodium hydroxide solution, control the temperature at 50°C and stir for 3h to obtain a slurry;

[0042] (2), add 12g directing agent and 300g water to the slurry obtained in step (1), stir for 1h to obtain a suspension, then transfer the suspension to a hydrothermal kettle for crystallization, and control the crystallization temperature to 90 ℃, the crystallization time is 10h, and the crystallized product is obtained after the crystallization is completed;

[0043] (3) The crystallized product of step (2) is cooled and washed until neutral, then dried to obtain a powder, and the powder is calcined at 500...

Embodiment 2

[0047] Embodiment 2 Waste MTP catalyst prepares Y molecular sieve

[0048] In this example, the silicon / aluminum molar ratio of the spent MTP catalyst is 2, and the coke formation rate is 4%. The method for preparing Y molecular sieve by waste MTP catalyst comprises the steps:

[0049] (1), take 40g of waste MTP catalyst fine powder and add 200g of concentration into 1mol / L sodium hydroxide solution, control the temperature at 50°C and stir for 3h to obtain a slurry;

[0050] (2), add 12g directing agent and 300g water to the slurry obtained in step (1), stir for 1h to obtain a suspension, then transfer the suspension to a hydrothermal kettle for crystallization, and control the crystallization temperature to 90 ℃, the crystallization time is 10h, and the crystallized product is obtained after the crystallization is completed;

[0051] (3) The crystallized product of step (2) is cooled and washed until neutral, then dried to obtain a powder, and the powder is calcined at 600...

Embodiment 3

[0055] Embodiment 3 waste MTP catalyst prepares Y molecular sieve

[0056] In this example, the silicon / aluminum molar ratio of the spent MTP catalyst is 3, and the coke formation rate is 6%. The method for preparing Y molecular sieve by waste MTP catalyst comprises the steps:

[0057] (1), take 40g of spent MTP catalyst fine powder and add 800g of concentration into 1mol / L sodium hydroxide solution, control the temperature at 60°C and stir for 2h to obtain a slurry;

[0058] (2) Add 24g of directing agent and 600g of water to the slurry obtained in step (1), stir for 1 hour to obtain a suspension, then transfer the suspension to a hydrothermal kettle for crystallization, and control the crystallization temperature to 150°C , the crystallization time is 15h, and the crystallized product is obtained after the crystallization is completed;

[0059] (3) The crystallized product of step (2) is cooled and washed until neutral, then dried to obtain a powder, and the powder is calc...

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Abstract

The invention discloses a method of preparing a Y molecular sieve by a waste MTP catalyst. The method comprises the following steps: (1) crushing the waste MTP catalyst into fine powder, mixing the waste MTP catalyst fine powder with 1-5 mol / L alkali liquor in a mass ratio of 1: (5-20) and stirring the mixture uniformly to obtain slurry; (2) adding a proper amount of a guiding agent and water intothe slurry in the step (1), uniformly mixing the mixture to obtain a turbid liquid, and then transferring the turbid liquid into a hydrothermal kettle to be crystallized; and (3) after crystallization, cooling, washing, drying and roasting the crystallized product to obtain a final product. The method takes the waste MTP catalyst as the raw material without adding a silicon source and an aluminumsource additionally. The Y molecular sieve can be synthesized effectively by adopting a process condition of synthesizing the Y molecular sieve and wastes are turned into wealth, so that the resources are saved, and the waste MTP catalyst is converted into the Y molecular sieve with a high additional value. The method has quite important social meaning and economical value.

Description

technical field [0001] The invention belongs to the field of catalyst preparation and relates to a method for reusing waste MTP catalysts, in particular to a method for preparing Y molecular sieves from waste MTP catalysts and the application of waste MTP catalysts. Background technique [0002] Low-carbon olefins, especially ethylene and propylene, are the leading products of petrochemical products and one of the important symbols to measure a country's petrochemical industry and economic development. Ethylene is mainly used to produce polyethylene, which is widely used in agricultural film, adhesives, wire and cable, packaging and polymer processing. Propylene is mainly used to produce polypropylene, acetone, butanol, octanol, phenol , synthetic glycerin, etc., the polypropylene made is widely used in plastic products, film products, fiber products and other daily necessities. [0003] At present, the production methods of olefins can be generally divided into two categor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/24
CPCC01B39/24C01P2002/72C01P2006/12
Inventor 薛招腾刘俊韩峰夏建超文怀有谈赟
Owner SHANGHAI NOVEL CHEM TECH
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