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Preparation method of epoxidation catalyst

A catalyst and epoxidation technology, which is applied in the chemical industry, can solve the problems of heavy environmental burden and three wastes, and achieve the effects of avoiding large-scale use, saving water resources and energy consumption, and saving raw material costs

Active Publication Date: 2022-02-18
HONGBAOLI GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of three wastes and large environmental burdens in the production process of the above-mentioned titanium-silicon molecular sieve, the present invention provides a method for preparing an epoxidation catalyst

Method used

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  • Preparation method of epoxidation catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In a reaction kettle with a capacity of 3L (PCF3-3.0 / 316L, Yantai Songling Chemical Equipment Co., Ltd., the same below), add 100g of fumed silica, 2g of tetramethyl titanate and 45g of ammonium carbonate whose mass percentage concentration is 15% The solution was filled with nitrogen to adjust the pressure to 0.3MPa, the stirring was turned on, the temperature was raised to 40 °C for reaction for 24 h, and the titanium-silicon slurry was obtained; the titanium-silicon slurry was cooled to 25 °C and then transferred to a Yaxi liquid nitrogen biological container (10L type, Sichuan Asia West Machinery Co., Ltd., the same below), poured in liquid nitrogen for crystallization for 12 hours, stopped pouring in liquid nitrogen, and dried at 50 °C for 8 hours to obtain the titanium-silicon catalyst precursor; put the titanium-silicon catalyst precursor in an electric heating furnace (YKRL type, Baoying County Electric Heating Appliance Factory, the same below) was aged at 350°C...

Embodiment 2

[0024] Add 100g column chromatography silica gel powder, 12g tetrabutyl titanate and 85g tetramethylammonium hydroxide solution with a concentration of 2% in a reaction kettle with a capacity of 3L, fill with nitrogen to adjust the pressure to 2MPa, start stirring, and heat up. Reaction at 210 °C for 8 hours to obtain titanium-silicon slurry; cool the titanium-silicon slurry to 35 °C and then move it into a Yaxi liquid nitrogen biological container, pour in liquid nitrogen for crystallization for 36 hours, stop pouring liquid nitrogen, and dry at 20 °C for 20 hours to obtain Titanium-silicon catalyst precursor; put the titanium-silicon catalyst precursor in an electric heating furnace at 200°C for 48h aging to obtain an epoxidation catalyst CAT2 # .

Embodiment 3

[0026] Add 100g of thin-layer chromatography silica gel powder, 7g of titanium tetrachloride and 65g of ammonium acetate solution with a concentration of 8.5% by mass into a reaction kettle with a capacity of 3L, fill with nitrogen to adjust the pressure to 1.2MPa, start stirring, and heat up to 105 React at ℃ for 16 hours to obtain titanium-silicon slurry; cool the titanium-silicon slurry to 35 ℃ and move it into a liquid nitrogen biological container in Yaxi, pour in liquid nitrogen for crystallization for 24 hours, stop the introduction of liquid nitrogen, and dry at 40 ℃ for 14 hours to obtain titanium-silicon Catalyst precursor; put the titanium-silicon catalyst precursor in an electric heating furnace at 280°C for 30h aging to obtain an epoxidation catalyst CAT3 # .

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Abstract

The invention discloses a preparation method of an epoxidation catalyst, the preparation method comprises the following steps: 1) adding an amorphous silicon source, a titanium source and an alkali source into a reaction container, and reacting at the pressure of 0.3-2MPa and the temperature of 40-210 DEG C to obtain titanium-silicon slurry; 2) transferring the titanium-silicon slurry into a crystallization kettle, introducing liquid nitrogen for crystallization, and after crystallization is completed, removing the liquid nitrogen and freeze-drying to obtain a titanium-silicon catalyst precursor; and 3) placing the titanium-silicon catalyst precursor in a heating furnace, and aging at 200-350 DEG C to obtain the epoxidation catalyst. The preparation method can significantly reduce the emission of three wastes, saves energy consumption, and is beneficial to environmental protection.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and particularly relates to a preparation method of an epoxidation catalyst. Background technique [0002] With the rapid economic growth of our country and great achievements in various constructions, the contradiction between economic development and environmental protection has become increasingly acute. At the same time, the issue of global climate change caused by greenhouse gas emissions has also attracted widespread attention from the international community. In the chemical industry, many processes have problems such as large impact on the environment and low production efficiency, such as the production technology of titanium silicon molecular sieve. [0003] Titanium-silicon molecular sieve is a commonly used catalyst in the preparation process of propylene oxide. It is divided into different types according to the different preparation processes. For example, TS-1 type titan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/89B01J35/10C07D301/19C07D303/04
CPCB01J29/89C07D301/19C07D303/04B01J35/617B01J35/633B01J35/635B01J35/638B01J35/647B01J35/615
Inventor 余渡江黄东平邢益辉张益军闫旭张蒙蒙
Owner HONGBAOLI GRP CO LTD
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