Activating method of solid phosphoric acid catalyst

A technology of phosphoric acid catalyst and activation method, which is applied in the field of activation of solid phosphoric acid catalyst, can solve the problems of poor repeatability of activation results, unstable activation temperature, etc., and achieve the effects of stable activation operation, stable air flow, and accurate quantification

Inactive Publication Date: 2003-05-21
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a kind of activation method of solid phosphoric acid catalyst in order to overcome the unstable activation temperature caused by the unstable activation air flow in the above-mentioned documents, the poor repeatability of activation results or the activation method of solid phosphoric acid catalyst. Accurate quantification of water vapor, stable temperature of activated gas and good reproducibility of activation results

Method used

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  • Activating method of solid phosphoric acid catalyst
  • Activating method of solid phosphoric acid catalyst

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Experimental program
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Effect test

Embodiment 2

[0034] The operating temperature of the packing layer 7 of the controlled packed tower is 220°C, the temperature of the catalyst bed layer 8 of the activation tower is 220°C, the operating temperature of the activation gas introduction pipe 3 is 250°C, and the water is counted as 20 moles per liter of catalyst per hour. , so that the air: water vapor molar ratio is 1:1; the activation time is 4 hours. Other conditions are with embodiment 1. The catalyst finished product that makes consists of:

[0035] SiB 0.7 (P 2 o 5 ) 1.4 ·(H 2 O) 0.75

[0036] After activation, the activity of the solid phosphoric acid catalyst is 76% in terms of propylene conversion rate, and its free phosphoric acid is calculated as P 2 o 5 The percentage by weight is calculated as 11%. [Example 3]

Embodiment 3

[0037] Control packing tower packing layer 7 operating temperature is 280 ℃, activation tower catalyst bed 8 temperature 270 ℃, activation gas inlet pipe 3 operating temperature is 280 ℃, water counts as 50 moles per liter of catalyst per hour, The air:water vapor molar ratio is 1.4:1; the activation time is 5 hours. Other conditions are with embodiment 1. The catalyst finished product that makes consists of:

[0038] SiB 1.0 (P 2 o 5 ) 1.5 ·(H 2 O) 0.9

[0039] After activation, the activity of the solid phosphoric acid catalyst is 79% in terms of propylene conversion rate, and its free phosphoric acid is calculated as P 2 o 5 The percentage by weight is calculated as 15%. 【Example 4】

Embodiment 4

[0040] Control packing tower packing layer 7 operating temperature is 300 ℃, activation tower catalyst bed 8 temperature 280 ℃, activation gas inlet pipe 3 operating temperature is 280 ℃, water counts as 70 moles per liter of catalyst per hour, The air:water vapor molar ratio is 1.7:1; the activation time is 4 hours. Other conditions are with embodiment 1. The catalyst finished product that makes consists of:

[0041] SiB 0.8 (P 2 o 5 ) 1.6 ·(H 2 O) 0.95

[0042] After activation, the activity of the solid phosphoric acid catalyst is 81% in terms of propylene conversion rate, and its free phosphoric acid is calculated as P 2 o 5 The percentage by weight is calculated as 17%. 【Example 5】

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Abstract

An activating method of solid phosphoric acid catalyst adopts two-tower series operation process to make quantitative water contact with superheated filler to produce quantitative aqueous vapour, and the introduced quantity of the aqueous vapour is (by mole number of each hour for each litre of catalyst) 15-100, the mole ratio of air and aqueous vapour is 0..3.0:1, and its catalyst activating temp. is 200-400 deg.C, and its activating time is 2-6 hr. This invention solves the defect of existent technology whose activating operation is not stable, and possesses the characteristics of accurate aqueous vapour quantity, stable activating temp. and good activated result reproducibility. It can be used in industrial production.

Description

technical field [0001] The invention relates to an activation method of a solid phosphoric acid catalyst. Background technique [0002] Catalyst, as a catalyst to accelerate the process of chemical reaction, has been widely used in many fields such as petrochemical industry, fine chemical industry and pharmaceutical synthesis, and the catalyst activation process is an indispensable process that is often used in the production and preparation of catalysts. In the production of certain catalysts such as solid phosphoric acid catalysts, it is often necessary to pass a certain flow of water vapor and air mixture into the catalysts that have been shaped and roasted to activate them. The activation process enables the catalyst to obtain a better pore structure and pore size distribution, and improves the selectivity of the target product to achieve the purpose of increasing the product yield. [0003] The main preparation process of solid phosphoric aci...

Claims

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Application Information

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IPC IPC(8): B01J27/16B01J38/04
Inventor 陈永福张丽君姚亚平袁梅卿徐菁
Owner CHINA PETROCHEMICAL CORP
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