Sapo-34 molecular sieve raw powder and its synthesis method

A technology of SAPO-34 and synthesis method, applied in the field of molecular sieves, to achieve the effect of friendly environment

Active Publication Date: 2018-11-09
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the field of SAPO-34 molecular sieve raw powder synthesis, there have been no reports about continuing to crystallize defective and unqualified products produced in the production process to produce qualified SAPO-34 products

Method used

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  • Sapo-34 molecular sieve raw powder and its synthesis method
  • Sapo-34 molecular sieve raw powder and its synthesis method
  • Sapo-34 molecular sieve raw powder and its synthesis method

Examples

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preparation example Construction

[0036] The above SAPO-34 molecular sieve raw powder provided by the present invention can be prepared by using a conventional SAPO-34 molecular sieve raw powder preparation process after mixing unqualified SAPO-34 molecular sieve raw powder into the synthetic raw material of SAPO-34 molecular sieve raw powder. In a preferred embodiment of the present invention, the method for synthesizing raw SAPO-34 molecular sieve powder includes the following steps: mixing the unqualified raw powder of SAPO-34 molecular sieve into the synthetic raw material of raw SAPO-34 molecular sieve powder to obtain the mixed raw material; and The mixed raw materials are subjected to aging, hydrothermal crystallization, and solid-liquid separation to obtain a solid phase in sequence, and the raw SAPO-34 molecular sieve powder is obtained after drying.

[0037] Applying the above-mentioned scheme provided by the invention, by using the unqualified raw powder of SAPO-34 molecular sieve produced due to the...

Embodiment 1

[0055] Using pseudo-boehmite, 85% phosphoric acid, and silica sol as raw materials, and triethylamine as a template, according to the molar ratio of raw materials Al 2 o 3 :P 2 o 5 :0.4SiO2 2 :3.0Et 3 N:50H 2 O configuration basic raw material powder, and according to the basic raw material powder of 90% in weight percentage, SAPO-34 molecular sieve unqualified former powder in 10% sample 1 (SEM figure is as shown figure 2 shown) were mixed to prepare the colloidal solution of SAPO-34 molecular sieve raw powder before crystallization. After aging at 40°C for 12h, they were crystallized at 200°C for 48 hours in a 150mL high-pressure hydrothermal kettle. Cut off the power supply of the hydrothermal crystallization kettle, after reducing the pressure and cooling down, unload the slurry into the discharge tank, after static stratification, put the lower layer slurry into the ground tank, and vacuum suction to the plate and frame filter device, the molecular sieve slurry Per...

Embodiment 2

[0057] Using pseudo-boehmite, 85% phosphoric acid, and silica sol as raw materials, and triethylamine as a template, according to the molar ratio of raw materials Al 2 o 3 :P 2 o 5 :0.4SiO2 2 :3.0Et 3 N:50H 2 O configure basic raw material powder, and according to the basic raw material powder of 95% in weight percentage, SAPO-34 molecular sieve unqualified former powder in 5% sample 2 is mixed to prepare SAPO-34 molecular sieve former powder crystallization front colloid solution, 50 ℃ After aging for 8 h, 36 were crystallized at 200 °C in a 150 mL autoclave. Cut off the power supply of the hydrothermal crystallization kettle, after reducing the pressure and cooling down, unload the slurry into the discharge tank, after static stratification, put the lower layer slurry into the ground tank, and vacuum suction to the plate and frame filter device, the molecular sieve slurry Perform solid-liquid separation. After repeated beating-filtration (pH=7), the separated solid ma...

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Abstract

The invention discloses SAPO-34 molecular sieve raw powder and a synthetic method thereof. Synthetic raw materials of the SAPO-34 molecular sieve raw powder include 1%-10% of unqualified SAPO-34 molecular sieve raw powder which is produced in an abnormal hydrothermal crystallization process or abnormal burdening operation. According to the SAPO-34 molecular sieve raw powder, since the unqualified SAPO-34 molecular sieve raw powder which is produced in the abnormal hydrothermal crystallization process or abnormal burdening operation for synthesis of the SAPO-34 molecular sieve raw powder is used as the raw material of the SAPO-34 molecular sieve raw powder, stacking of waste containing the unqualified product, discharge of slurry and pollution to the environment can be eliminated, and the SAPO-34 molecular sieve raw powder is environmentally friendly; moreover, the yield of qualified molecular sieves can be increased while waste of the raw materials is avoided.

Description

technical field [0001] The invention relates to the field of molecular sieves, in particular to a SAPO-34 molecular sieve raw powder and a synthesis method thereof. Background technique [0002] With the shortage of petroleum resources and rising prices, the contradiction between supply and demand of low-carbon olefins such as ethylene and propylene has become increasingly prominent, and all countries are committed to alternative energy sources to produce important petrochemical basic raw materials-low-carbon olefins. Coal-to-olefins is the link between coal chemical industry and petrochemical industry. It not only realizes the diversification of petrochemical raw materials, but also broadens the development field of coal chemical industry and realizes the partial replacement of petroleum resources. It is the most promising development field of new coal chemical industry. [0003] The core of methanol to olefins technology is the development of molecular sieve catalysts. Cat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/54C01B37/08
CPCC01B37/08C01B39/54C01P2002/60C01P2002/72C01P2004/03
Inventor 刑爱华朱伟平
Owner CHNA ENERGY INVESTMENT CORP LTD
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