Preparation method of nanometer solid super base catalyst applied to synthesis of acrylic acid by utilizing acetic acid and formaldehyde

A technology of solid super alkali and acrylic acid, which is applied in the preparation of organic compounds, carboxylate salts, catalyst carriers, etc. It can solve the problems of shortage of propylene petroleum raw materials and restrictions on the production of acrylic acid, so as to improve the anti-poisoning ability and reduce the risk , The effect of simple preparation process

Inactive Publication Date: 2013-08-07
谦信化工集团有限公司
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  • Application Information

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Problems solved by technology

Since a large part of petroleum is consumed as energy, there is a shortage of petroleum ra

Method used

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  • Preparation method of nanometer solid super base catalyst applied to synthesis of acrylic acid by utilizing acetic acid and formaldehyde

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Embodiment 1

[0027] Embodiment 1 of the present invention describes the present invention in further detail below in conjunction with the embodiments.

[0028] A kind of preparation method of acetic acid and formaldehyde synthetic acrylic acid nanometer solid superbase catalyst, comprises the following steps:

[0029] Step 1: Quantitatively measure 75 ml of cyclohexane, 16 ml of n-hexanol and 4 ml of water in a beaker and mix well.

[0030] Step 2: Quantitatively measure 17.7 ml of polyethylene glycol octylphenyl ether into the mixed solution in Step 1, and stir vigorously to mix evenly.

[0031] Step 3: Add 1.0 ml tetraethoxysilane to the solution obtained in Step 2 and stir vigorously to mix thoroughly.

[0032] Step 4: Increase the temperature of the solution obtained in Step 3 to 35 °C and keep stirring for 30 min.

[0033] Step 5: Slowly add 0.6 ml of ammonia water dropwise to the solution obtained in Step 4, and react at room temperature for 1 h until a large amount of white precip...

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Abstract

The invention discloses a preparation method of a nanometer solid super base catalyst applied to the synthesis of acrylic acid by utilizing acetic acid and formaldehyde. The preparation method comprises the following steps of preparing monodisperse spherical nanometer silicon oxide grains by taking silylating reagent as a raw material and ammonia water as a catalyst and reasonably controlling reaction conditions; preparing impregnation liquid by utilizing a certain of CsOH, adding a carrier to impregnate for a while, drying the impregnation liquid by distillation in a water bath manner, drying in a drying oven at a certain temperature, putting a dried mixture in a muffle furnace to roast for a while at the controlled temperature, and obtaining the fresh load-type nanometer solid super base catalyst. The nanometer solid super base catalyst prepared by the method disclosed by the invention contains nanometer SiO2, so that the poison tolerance of the solid super base catalyst is improved and the stability is better; and the preparation method disclosed by the invention has the advantages of simple experimental devices, simple catalyst preparation process, low requirements on preparation devices, high catalyst activity and the like during preparation.

Description

technical field [0001] The invention relates to a preparation process of a nanometer solid superbase catalyst, in particular to a preparation method of a nanometer solid superbase catalyst for synthesizing acrylic acid with acetic acid and formaldehyde as raw materials. Background technique [0002] Acrylic acid (Acrylic Acid, AA) is an important organic synthesis raw material and synthetic resin monomer, and is a vinyl monomer with a very fast polymerization rate. Most of it is used to manufacture acrylates such as methyl acrylate, ethyl ester, butyl ester, and hydroxyethyl ester, and a small amount is used to produce superabsorbent resins, detergent builders, and water treatment agents. Acrylic acid and acrylate can be homopolymerized and copolymerized, and can also be copolymerized with monomers such as acrylonitrile, styrene, butadiene, vinyl chloride and maleic anhydride. Its polymers are used in industrial fields such as synthetic resins, adhesives, synthetic rubber, ...

Claims

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Application Information

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IPC IPC(8): B01J23/04B01J32/00B01J21/08C07C57/04C07C51/353
Inventor 赵楚榜于冬娥朱宏文谭代娣廖瑜张浩宁何文晖汪尚飞
Owner 谦信化工集团有限公司
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