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Method for quickly detecting alkali-resistant filtering performance of TS-1 catalyst

A TS-1, filtration performance technology, which is used in the field of testing the alkali resistance and filtration performance of catalysts, and can solve the problems of large area, unable to reflect the alkali resistance performance of titanium-silicon molecular sieve, and long test period.

Active Publication Date: 2020-08-18
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The device occupies a relatively large area, the operation is cumbersome, the test period is long, and it cannot reflect the alkali resistance of titanium-silicon molecular sieves.

Method used

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  • Method for quickly detecting alkali-resistant filtering performance of TS-1 catalyst
  • Method for quickly detecting alkali-resistant filtering performance of TS-1 catalyst
  • Method for quickly detecting alkali-resistant filtering performance of TS-1 catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Weigh 2.5g of the standard sample and the titanium-silicon molecular sieve catalyst sample from manufacturer A into a 50mL vial, and then add 47.5g of sodium hydroxide solution (6wt%) respectively. Ultrasonic vibration was used for 10 minutes, and then soaked at a constant temperature of 40°C for 30 hours. Under negative pressure, use a sand core funnel to filter under negative pressure for 10 minutes, control the vacuum at -0.08MPa, record the mass of the filtrate, and calculate the relative flux. The calculation results are shown in Table 1.

Embodiment 2

[0040] Weigh 2.5g of the standard sample and the titanium-silicon molecular sieve catalyst sample from manufacturer B into a 50mL vial, and then add 47.5g of sodium hydroxide solution (6wt%) respectively. Ultrasonic vibration for 10 minutes, followed by constant temperature soaking at 40°C for 30 hours. Under negative pressure, filter with a sand core funnel for 10 minutes, control the vacuum at -0.08MPa, record the mass of the filtrate, and calculate the relative flux. The calculation results are shown in Table 1.

Embodiment 3

[0042] Weigh 2.5g of the standard sample and C US imported sample into 50mL vials, and then add 47.5g of sodium hydroxide solution (6wt%) respectively. Ultrasonic vibration for 10 minutes, followed by constant temperature soaking at 40°C for 30 hours. Under negative pressure, filter with a sand core funnel for 10 minutes, control the vacuum at -0.08MPa, record the mass of the filtrate, and calculate the relative flux. The calculation results are shown in Table 1.

[0043] The relative flux result of table 1 embodiment 1-3

[0044] sample Relative flux / % A factory sample 129 Sample from manufacturer B 154 C import sample 327

[0045]It can be seen from Table 1 that the relative fluxes of TS-1 titanium-silicon shaped molecular sieve catalysts produced by different manufacturers vary greatly. Among them, the relative throughput of the imported molecular sieve C sample is much higher than that of the molecular sieves produced by the other two ma...

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Abstract

The invention provides a method for quickly detecting the alkali-resistant filtering performance of a TS-1 catalyst, which specifically comprises the following steps: putting one or more titanium silicalite molecular sieve catalyst molding particle samples into an alkaline solution, carrying out ultrasonic treatment, pulverizing, soaking for a period of time, carrying out suction filtration undervacuum conditions, measuring the filtering flux, and calculating the relative flux; according to the value of the relative flux, judging the alkali-resistant filtering performance of different titanium silicalite molecular sieve forming particle catalysts. The method can detect a plurality of samples at the same time and is high in measurement efficiency.

Description

technical field [0001] The invention provides a method for detecting the alkali-resistant filtration performance of a catalyst, and more specifically relates to a method for detecting the alkali-resistant filtration performance of a titanium-silicon molecular sieve catalyst. Background technique [0002] Titanium silicate molecular sieve TS-1 catalyst has been successfully applied in green chemical production processes such as propylene epoxidation, phenol hydroxylation and ammoximation. [0003] At present, the ammoximation reaction of titanium-silicon molecular sieve catalysts is mainly used in the cyclohexanone ammoximation section of caprolactam production. That is, under the action of a titanium-silicon molecular sieve catalyst, the three molecules of cyclohexanone, hydrogen peroxide and ammonia react in an aqueous solution of tert-butanol to generate cyclohexanone oxime and water, and the conversion rate and selectivity can reach 99.9% close to the meter In terms of co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04G01N1/38
CPCG01N5/04G01N1/38Y02P20/52
Inventor 屈凌波王向宇王妍妍温贻强高鑫魏会娟杨许可刘杨青
Owner ZHENGZHOU UNIV