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A kind of aluminum phosphate sol and preparation method thereof

A technology of aluminum phosphate sol and phosphate, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve problems such as pollution, environmental pollution, equipment corrosion environment, etc., to eliminate pollution, increase peptization depth, and improve resistance The effect of wear ability

Active Publication Date: 2019-09-03
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the phosphorus-containing aluminum sol provided by CN1417296A does not contain chlorine, it still inevitably contains a large amount of chlorine in the slurry before spray-drying and after spray-drying due to being mixed with the chlorine-containing aluminum sol during its preparation of catalyst, resulting in Equipment corrosion and environmental pollution problems still exist
Although this method can solve the problem of chloride ions, the decomposition of introduced nitrate in the catalyst roasting process will also cause serious environmental pollution.

Method used

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  • A kind of aluminum phosphate sol and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030]Add 2540 grams of deionized water, 1156 grams of pseudo-boehmite, 27 grams of ammonium dihydrogen citrate reagent in the reaction kettle, stir for 15 minutes, let stand for 4 hours, then stir, add 223 grams of concentrated phosphoric acid, stir for 20 minutes, The obtained sample is recorded as A1, and its Al 2 o 3 is 22.3% by weight, ammonium dihydrogen citrate is 0.6% by weight, and phosphorus is 1.6% by weight.

Embodiment 2

[0032] Add 2530 grams of deionized water, 882 grams of pseudoboehmite, and 712 grams of magnesium acetate reagent in the reaction kettle, stir for 25 minutes, let stand for 20 hours, then stir and add 846 grams of diammonium hydrogen phosphate, stir for 10 minutes and then add 2185 grams of concentrated phosphoric acid was stirred for 30 minutes, and the sample was recorded as A2, and its Al 2 o 3 is 10.6% by weight, magnesium acetate is 9.95% by weight, and phosphorus is 13% by weight.

Embodiment 3

[0034] Add 2530 grams of deionized water, 5083 grams of pseudoboehmite, and 600 grams of ammonium acetate reagent in the reaction kettle, stir for 30 minutes, stand still for 13 hours, then stir, add 1087 grams of ammonium phosphate and 2672 grams of concentrated phosphoric acid, and stir for 20 minutes , that is, the sample is recorded as A3, and its Al 2 o 3 is 35.4% by weight, ammonium acetate is 5.0% by weight, and phosphorus is 8.5% by weight.

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Abstract

The invention relates to aluminum phosphate sol and a preparation method thereof. The aluminum phosphate sol contains the following components in percentage by mass: 10%-50% of Al2O3, 0.5%-10% of soluble salt with an anion of C6H7O7<-> or CH2COO<-> or HCOO<-> and 1.5%-15% of P. The preparation method comprises the following steps: (1) stirring pseudo-boehmite, the soluble salt with the anion of C6H7O7<-> or CH2COO<-> or HCOO<-> and deionized water, and standing; and (2) uniformly stirring the slurry obtained in the step (1), and adding phosphoric acid or a mixture of phosphoric acid and phosphate. The aluminum phosphate sol is used for preparing a catalyst, so that the environmental pollution caused by chloride ions and nitrate ion is avoided; the aluminum phosphate sol can be directly used as a bonder of a catalytic cracking catalyst; and the heating is not required during the preparation, a preparation process is simple, high in phosphorus-aluminum ratio, the range is adjustable, and the industrial production is easily realized.

Description

technical field [0001] The invention relates to an aluminum sol and a preparation method thereof, in particular to a phosphorus-aluminum sol for a catalytic cracking catalyst and a preparation method thereof. Background technique [0002] Aluminum sol is one of the most important binders in the preparation of catalytic cracking catalysts, and the properties of aluminum sol directly affect the performance of catalytic cracking catalysts. Due to the high chlorine content in the commonly used aluminum sol, hydrochloric acid is generated during the catalyst spray drying molding process, which corrodes equipment and affects the environment. At the same time, the formed hydrochloric acid gas will also destroy the structure of molecular sieves in the catalyst, reducing the activity of the catalyst. [0003] In order to reduce the impact of chlorine in aluminum sol on the catalyst and the environment, the method of partially replacing aluminum sol with phosphorus-containing aluminum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/36C10G11/02
Inventor 潘志爽田爱珍袁程远李雪礼高永福孙雪芹王玲玲高雄厚张海涛谭争国黄校亮段宏昌丁伟郑云锋孙书红蔡进军
Owner PETROCHINA CO LTD
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