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A kind of spherical non-acidic molecular sieve and its preparation method and application

A molecular sieve and non-acidic technology, which is applied in the direction of crystalline aluminosilicate zeolite, octahedral crystalline aluminosilicate zeolite, borocarbane silicone crystalline aluminosilicate zeolite, etc., can solve the problem that oil cannot be circulated, the cost is high, and it is difficult to To achieve industrialization and other issues, to achieve the effect of improving catalytic efficiency, increasing service life, and improving mechanical strength

Active Publication Date: 2019-02-22
SYNFUELS CHINA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the oil phase does not contain surfactant, but because the oil layer is too thin, the oil cannot be circulated in large-scale industrial production, the cost is high, and it is difficult to realize industrialization

Method used

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  • A kind of spherical non-acidic molecular sieve and its preparation method and application
  • A kind of spherical non-acidic molecular sieve and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049]1) Take 67.6g of aluminum hydroxide powder (produced by Sasol Company with an aluminum oxide content of 76.7%) with a mesh number of 100, add it to 270g of water and stir for 0.5h under a water bath condition of 60°C, then add 25ml of the mass percentage concentration of 20% aqueous nitric acid solution was stirred for 2 hours to obtain a sol;

[0050] 2) Add 55g of NaY molecular sieve and 3.5g of small molecule additive ethylene glycol to the sol obtained in step 1) and stir for 0.5h to obtain a slurry;

[0051] 3) the slurry obtained in step 2) is dripped into the upper layer to be diesel oil, the lower layer is an aqueous solution of sodium carbonate with a concentration of 0.5mol / L, and the middle of the two phases is an aqueous solution of sodium lauryl amphoteric acetate (the volume ratio of sodium lauryl amphoacetic acid to water is 1 : 4) molding in the system, the volume ratio of the upper, middle and lower layers is 10:40:1, quickly taken out after dropping the...

Embodiment 2

[0053] 1) Take 33g of aluminum hydroxide powder (manufactured by Sasol Company, with an alumina content of 76.7%) whose mesh number is 100 mesh, add it to 100g of aqueous solution under the condition of stirring in a water bath at 80°C and stir for 1 hour, then add 18ml of the mass percent concentration 20% aqueous nitric acid solution was stirred for 4 hours to obtain a sol;

[0054] 2) Add 35gNa-ZSM-5 molecular sieve to the sol obtained in step 1) and stir for 1h to prepare a slurry;

[0055] 3) The slurry obtained in step 2) is dripped into the upper layer to be kerosene, the lower layer is a sodium metaaluminate aqueous solution with a concentration of 1mol / L, and the middle of the two phases is an aqueous solution of disodium lauryl sulfosuccinic acid monoester (lauryl sulfosuccinic acid The volume ratio of disodium monoester and water is 1:4), and the volume ratio of the upper, middle and lower layers is 5:50:1. After dropping the ball, take it out quickly to obtain a sp...

Embodiment 3

[0057] 1) Take 11.73g of aluminum hydroxide powder with a mesh number of 100 mesh (manufactured by Sasol Company, with an alumina content of 76.7%), add it to 55g of aqueous solution under the condition of stirring in a water bath at 70°C and stir for 0.5h, then add 10ml of mass percent Aqueous nitric acid solution with a concentration of 5% was stirred for 2.5 hours to obtain a sol;

[0058] 2) Add 21gKL molecular sieve and 1.1g small molecule additive cellulose to the sol obtained in step 1) and stir for 0.5h to prepare a slurry;

[0059] 3) The slurry obtained in step 2) is dripped into the upper layer to be diesel oil, the lower layer is an aqueous potassium carbonate solution with a concentration of 0.5mol / L, and the aqueous solution (potassium lauryl ether phosphate) mixed with fatty acid potassium soap between the two phases is , fatty acid potassium soap and water with a volume ratio of 1:1:4), and the volume ratio of the upper, middle and lower layers is 30:60:1. Afte...

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Abstract

The invention discloses a spherical non-acidic molecular sieve, and a preparation method and application thereof. The preparation method of the molecular sieve comprises the following steps: mixing and stirring aluminum hydroxide powder, water and an acid aqueous solution to obtain sol; then adding the non-acidic molecular sieve into the sol and stirring to obtain slurry; dropping into a system composed of an aqueous solution with oil on the upper layer, aging liquid on the lower layer and a surfactant between two phases to form, drying and roasting. Through the method, cations which are lost in the peptizing process of the non-acidic molecular sieve can be immediately supplemented, and no washing is required after a forming carrier is aged, so that the operating process is simplified. Meanwhile, after an introduced small molecular additive is roasted, the mechanical strength of the forming carrier is improved. The spherical non-acidic molecular sieve prepared by the preparation method is smooth in surface, uniform in particle size and higher in strength and can be widely used as an absorbing agent, a catalyst, a catalyst carrier and the like.

Description

technical field [0001] The invention relates to a spherical non-acidic molecular sieve and its preparation method and application. Background technique [0002] The oil ammonia column forming method is a common method for preparing alumina, silicon oxide, silicon aluminum and other pellets. After peptizing aluminum hydroxide powder with acid, it is dropped into the device where the upper layer is oil, the lower layer is aging solution, and the two phases are surfactants, so that the sol particles form balls in the oil phase and coagulate in the aging phase. glue. The pellets prepared by this method have smooth surface, uniform size, low wear and high strength, and are widely used as fixed-bed and moving-bed catalysts, catalyst carriers, and adsorbents. [0003] US4542113 dissolves boehmite or pseudo-boehmite in deionized water, stirs evenly to form an aluminum hydroxide suspension with a solid content of 20-40% by mass, adds dilute nitric acid solution for peptization, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/02C01B39/24C01B39/38
CPCC01B39/02C01B39/24C01B39/38C01P2004/32C01P2006/21
Inventor 陈骁黄丽华杨永陶智超杨勇李永旺
Owner SYNFUELS CHINA TECH CO LTD
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