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Preparation method of Y-type molecular sieve

A molecular sieve and clay technology, which is applied in the directions of favhedral crystalline aluminosilicate zeolite, crystalline aluminosilicate zeolite, etc., can solve the problems of high proportion of waste water, low yield per kettle, environmental pollution, etc., and achieves lower activation temperature, higher Volume utilization rate, the effect of overcoming a large amount of waste water

Inactive Publication Date: 2021-03-05
HUNAN JULI CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional synthetic methods have disadvantages such as low solid content, low single-pot yield, waste of resources, high proportion of wastewater, and serious environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) 650 g of kaolin, 150 g of sepiolite, and 200 g of diatomite were added to 697 ml of sodium hydroxide solution, soaked to saturation, and activated after drying. The activation condition was roasting at 500° C. for 2 hours to obtain activated clay;

[0022] (2) 500g of activated clay obtained in step (1), 50g of white carbon black, 393ml of water glass, 120ml of lye, and 155ml of guiding agent are mixed uniformly, and ground, and the grinding time is 60min;

[0023] (3) Put the mixture obtained in step (2) into a sealed reaction kettle, raise the temperature to 97° C., and crystallize for 24 hours. After the reaction, cool, wash, and dry to obtain a Y-type molecular sieve.

[0024] It is measured that 49.6% by weight of Y-type zeolite molecular sieve is contained in the composite material, and the specific surface area is 536m 2 / g, pore volume 0.33cm 3 / g.

Embodiment 2

[0026] (1) 500g of kaolin, 50g of halloysite, and 200g of attapulgite are added to 450ml of sodium hydroxide and 200ml of water glass solution, soaked to saturation, and activated after drying. The activation condition is roasting at 300°C for 5 hours to obtain activated clay;

[0027] (2) 300g of activated clay obtained in step (1), 90g of white carbon black, 415ml of water glass, 90ml of lye, and 160ml of guiding agent are mixed uniformly, and ground for 30min;

[0028] (3) Put the mixture obtained in step (2) into a sealed reactor, heat up to 120° C., and crystallize for 10 h. After the reaction, cool, wash, and dry to obtain a Y-type molecular sieve.

[0029] It is measured that 54.5% by weight of Y-type zeolite molecular sieve is contained in the composite material, and the specific surface area is 581m 2 / g, pore volume 0.32cm 3 / g.

Embodiment 3

[0031] (1) 100g of kaolin was added to 63ml of sodium hydroxide solution, soaked to saturation, and then activated after drying. The activation condition was roasting at 400°C for 3 hours to obtain activated clay;

[0032] (2) 50g of activated clay obtained in step (1), 10g of white carbon black, 67ml of water glass, 14ml of lye, and 13ml of directing agent are mixed uniformly, and ground, and the grinding time is 120min;

[0033] (3) Put the mixture obtained in step (2) into a sealed reactor, raise the temperature to 110° C., and crystallize for 18 hours. After the reaction, cool, wash, and dry to obtain a Y-type molecular sieve.

[0034] It is measured that the composite material contains 63.7% by weight of Y-type zeolite molecular sieve, and the specific surface area is 622m 2 / g, pore volume 0.32cm 3 / g.

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Abstract

The invention relates to a preparation method of a Y-type molecular sieve. The method is characterized by comprising the following steps: 1) adding clay into an alkaline solution, performing dipping until saturation, performing drying, and performing activating to obtain activated clay; 2) mixing and grinding the activated clay obtained in the step 1), white carbon black, water glass, alkali liquor and a guiding agent according to a certain proportion; and 3) putting a mixture obtained in the step 2) into a sealed reaction kettle, heating the kettle to 90-120 DEG C, performing crystallizing for 8-30 hours, and performing cooling, washing, filtering and drying after the reaction is finished to obtain the Y-type molecular sieve. The raw materials are cheap and easy to obtain, the process issimple, the problems of pollution and the like caused by a large amount of mother liquor generated by a traditional hydrothermal synthesis method are solved, and green, economical and efficient synthesis of the Y-type molecular sieve can be realized.

Description

technical field [0001] The invention relates to a method for preparing a Y-type molecular sieve, in particular, the Y-type molecular sieve is prepared by an in-situ synthesis method using activated clay. It belongs to the field of inorganic material synthesis. Background technique [0002] Molecular sieve refers to a class of substances with uniform micropores whose pore size is equivalent to that of ordinary molecules. The inner diameter of the supercage cavity in the Y-type molecular sieve structure is about 1.3nm, and the orifice diameter of its twelve-membered ring is 0.74nm. It is precisely because the Y-type molecular sieve has a large cavity and a three-dimensional twelve-membered ring channel system that a variety of organic molecules can enter the supercage and undergo catalytic reactions. [0003] Currently, the most common synthesis methods for Y-type molecular sieves are hydrothermal synthesis and hydrothermal conversion. In 1964, USP3119659 disclosed that kao...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/24
CPCC01B39/24C01P2006/12C01P2006/14C01P2006/80
Inventor 谈立成郑淑琴
Owner HUNAN JULI CATALYST