Forming method for molecular sieve

A molding method and technology of molecular sieves, which are applied in the direction of molecular sieve catalysts, chemical instruments and methods, and other chemical processes, can solve the problems of molecular sieve structure damage safety, environmental protection, etc., and achieve small structural damage, good technical effects, and small environmental impacts Effect

Inactive Publication Date: 2012-05-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the structural damage of molecular sieves and problems of safety and environmental protection will be caused by the addition of nitric acid during the industrial molding of existing molecular sieves, and a new molecular sieve molding method is provided.

Method used

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  • Forming method for molecular sieve
  • Forming method for molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The alumina and molecular sieves for molding are purchased commercial alumina and commercial 13X molecular sieve raw powder respectively.

[0017] Add nitric acid molding

[0018] Mix 0.4kg of 13X molecular sieve raw powder, 1.5kg of alumina and 50g of turnip powder in a kneader, stir evenly, add 1.1kg of dilute nitric acid solution with a weight concentration of 3%, knead, extrude into strips, dry and place in a horse In a Furnace, it was fired at 520°C for 4h, and the diameter of the molded sample was 2.5mm, named as sample A.

[0019] Add aluminum nitrate solution molding

[0020] Mix 0.4kg of 13X molecular sieve raw powder, 1.5kg of alumina and 50g of turnip powder in a kneader, stir evenly, add 1.0kg of aluminum nitrate solution with a weight concentration of 7%, knead, extrude into strips, dry and place in a horse In the Furnace, it was fired at 520°C for 4h, and the diameter of the molded sample was 2.5mm, named as sample B.

[0021] The properties of sample A...

Embodiment 2

[0032] The alumina and molecular sieves used for molding are purchased commercial alumina and commercial NaY molecular sieve raw powder respectively.

[0033] Add nitric acid molding

[0034] Mix 1.2kg of NaY molecular sieve raw powder, 0.8kg of alumina and 50g of turnip powder in a kneader, stir evenly, add 1.1kg of dilute nitric acid solution with a weight concentration of 5%, knead, extrude into strips, dry and place in a horse In the Furnace, it was fired at 520°C for 4h, and the diameter of the molded sample was 2.5mm, named as sample C.

[0035] Add aluminum nitrate solution molding

[0036] Mix 1.2kg of NaY molecular sieve raw powder, 0.8kg of alumina and 50g of turnip powder in a kneader, and after stirring evenly, add 1.1kg of aluminum nitrate solution with a weight concentration of 10.4%, knead and extrude into strips, dry and place in a horse In the Furnace, it was fired at 520°C for 4h, and the diameter of the molded sample was 2.5mm, named as sample D.

[0037]...

Embodiment 3

[0045] The alumina and molecular sieves for molding are purchased commercial alumina and commercial 5A molecular sieve raw powder respectively.

[0046] Add nitric acid molding

[0047] Mix 0.2kg of 5A molecular sieve raw powder, 1.8kg of alumina and 50g of turnip powder in a kneader, stir evenly, add 1.0kg of dilute nitric acid solution with a weight concentration of 5%, knead, extrude into strips, dry and place in a horse In the Furnace, it was fired at 520°C for 4h, and the diameter of the molded sample was 2.5mm, named as sample E.

[0048] Add aluminum sulfate solution molding

[0049] Mix 0.2kg of 5A molecular sieve raw powder, 1.8kg of alumina and 50g of turnip powder in a kneader, and after stirring evenly, add 1.1kg of aluminum sulfate solution with a weight concentration of 2%, knead, extrude and form, dry and place in a horse In the Furnace, it was fired at 520°C for 4h, and the diameter of the molded sample was 2.5mm, named as sample F.

[0050] The various perf...

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Abstract

The invention relates to a forming method for a molecular sieve, which mainly solves the problems of damaged the molecular sieve structure, lowered the specific surface area of the molecular sieve and corroded equipment because of adding nitric acid in the traditional forming technology. In the forming method for the molecular sieve, a technical scheme that inorganic aluminum salt solution serves as additive for forming better solves the problems. The forming method for the molecular sieve can be used for the production application of catalyst and adsorbent.

Description

technical field [0001] The invention relates to a molding method of molecular sieves. Background technique [0002] Artificially synthesized molecular sieves are generally in the form of powder. To achieve the purpose of industrial application, molecular sieves often need to be mixed with a binder, and then molded into shapes required by various industrial applications. [0003] Industrial applications require molded samples to have a certain strength, and the original properties of molecular sieves, such as specific surface area and reactivity, can be retained to the maximum extent, which puts forward requirements for binders and molding methods. Alumina is a commonly used binder because of its high specific surface area, good compressive strength, and suitable acidity and alkalinity. The molding method is usually to mix molecular sieve and alumina, add nitric acid, then knead and extrude. For example, the patent of Publication No. CN101439293 introduces a preparation met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/02B01J20/18B01J29/06B01J35/02
Inventor 陶伟川刘苏张宏斌肖永厚王仰东
Owner CHINA PETROLEUM & CHEM CORP
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