Solid base catalyst, method for preparing the same and applications

A solid base catalyst and carrier technology, applied in physical/chemical process catalysts, hydrogenolysis preparation, metal/metal oxide/metal hydroxide catalysts, etc. and other problems, to achieve the effect of simple separation and treatment, no three wastes, and high catalytic activity

Inactive Publication Date: 2008-10-01
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are several domestic companies engaged in this production, but the process investment is relatively large, and many technologies have not passed the test, so the cost is high and the production scale is not large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Take 100g γ-Al 2 o 3 (Wenzhou Jingjing Alumina Co., Ltd.), add 2g aluminum sol (Jiangyin Xiagang Chemical Factory) as a binder, add 10g Mg(OAc) 2 , mix and grind for 1 hour, add 0.5g Ca(OH) 2 , add 3g of polyacrylamide (Henan Luoshan Zhongyuan Polymer Co., Ltd., molecular weight 8 million to 10 million) as extrusion aid, continue mixing and grinding for 2 hours, add 20g of water, and extrude it into mm strips. Dry the product under infrared light for 5 hours, put it in an oven to dry at 100°C for 10 hours, and finally put it in a muffle furnace and bake it at 500°C for 4 hours to obtain a solid alkali catalyst. After cooling, put it in a desiccator for use.

[0044] In a reactor equipped with a rectifying column and a stirrer, add 130 g (1 mole) of ethyl acetoacetate, 102 g (1 mole) of acetic anhydride, and 3 g of the solid base catalyst prepared above, stir and maintain at 130 ° C for 16 During the reaction, the ethyl acetate generated during the reaction was dist...

Embodiment 2

[0047] Take 100g γ-Al 2 o 3 As a carrier, add 3g glycerin as a binder, add 5g MgO, mix and grind for 1 hour, add 0.5g KOH, add 3g polyacrylamide (Henan Luoshan Zhongyuan Polymer Co., Ltd., molecular weight 8 million to 10 million) as an extrusion aid agent, continue to mix and grind for 2 hours, add an appropriate amount of water, and extrude it into mm strips. The product was dried under an infrared lamp for 5 hours, put into an oven to dry at 120°C for 8 hours, and finally placed in a muffle furnace and roasted at 550°C for 4 hours to obtain the solid alkali catalyst, which was cooled and placed in a desiccator for later use.

[0048] In a reactor equipped with a rectifying column and a stirrer, add 130 grams (1 mole) of ethyl acetoacetate, 102 g (1 mole) of acetic anhydride, and 3 g of the solid base catalyst prepared above, stir and maintain at 130 ° C The reaction was carried out for 18 hours. At the same time, the ethyl acetate generated during the reaction was disti...

Embodiment 3

[0051] Take 100g γ-Al 2 o 3 , add 3g starch as binder, add 10g Mg(CO 3 ) 2 , mixing and grinding for 0.5 hours, adding 0.5g NaOH, adding 2g polyacrylamide (Henan Luoshan Zhongyuan Polymer Co., Ltd., molecular weight 8 million to 10 million) as extrusion aid, continuing mixing and grinding for 2 hours, adding an appropriate amount of water, using extrusion machine mm strips. The product was dried under an infrared lamp for 5 hours, put into an oven to dry at 100°C for 6 hours, and finally placed in a muffle furnace and roasted at 500°C for 3 hours to obtain the solid alkali catalyst, which was cooled and placed in a desiccator for later use.

[0052] In a reactor equipped with a rectifying column and a stirrer, add 130 grams (1 mole) of ethyl acetoacetate, 112 g (1.1 mole) of acetic anhydride, and 3 g of the solid base catalyst prepared above, stir and maintain at 130 ° C The reaction was carried out for 16 hours. At the same time, the ethyl acetate generated during the r...

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PUM

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Abstract

The invention provides a solid base catalyst and a preparation method thereof for preparing acetylacetone with the solid base catalyst. The solid base catalyst is prepared mainly by the components with the weight composition as follows: carrier: 100 portions of Gamma-Al2O3, load components: 0.5-8 portions of adhesive, 5-35 portions of magnesium compound, 0.5-10 portions of hydroxide and 0.5-5 portions of polyacrylamide; the invention has the beneficial effects which are mainly indicated by that: compared with the catalyst prepared by the traditional dipping method, the solid base catalyst prepared by the method of the invention directly adopts a mixed forming method, has simple preparation method and easy controlling of conditions, avoids the generation of oxide which is generated in the roasting process by adopting nitrate former body, thus generating no environmental pollution problem; when the solid base catalyst of the invention is used for catalysing the ethyl acetoacetate and acetic anhydride to synthesize acetylacetone, the yield is high, the equipment investment is little, and no three-waste exists, thus being beneficial for industrialized production.

Description

(1) Technical field [0001] The invention relates to a solid base catalyst, a preparation method thereof, and a method for preparing acetylacetone using the solid base catalyst. (2) Background technology [0002] Acetylacetone is also known as 2,4-pentanedione, and its structural formula is CH 3 COCH 2 COCH 3 , the pure product is a colorless liquid. Acetylacetone has a variety of synthetic process routes, such as: enone method, acetone method, propyne method, etc. The above methods are different, or the reaction conditions are difficult to control, the yield is low, the industrial route is long, the investment is large, and the pollution control is difficult. . [0003] Acetylacetone has a wide range of uses and is used in the synthesis of sulfamethazine in western medicine. Acetylacetone is also used in the intermediate 3,5-dimethylisoxazole of the antiviral agent WIN51711, the intermediate 3,5-dimethylpyrazole of the antidiabetic drug AD-58, etc.; the synthesis of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/02B01J23/04C07C45/41C07C49/14
Inventor 裴文王勤董志刚
Owner ZHEJIANG UNIV OF TECH
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