Method for preparing C21 binary acid by using micro-channel technology

A dibasic acid and microchannel technology, which is applied in the preparation of carboxylate, chemical instruments and methods, and the preparation of organic compounds, can solve the problems of increased personnel input, increased production costs, and increased temperature, and achieve thermal quality The effect of high transfer rate, high production efficiency and excellent performance

Inactive Publication Date: 2021-03-16
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this method, the bacterium itself will produce respiratory metabolism, resulting in an increase in temperature, requiring a large amount of cooling water to cool down the fermentation system, resulting in large energy consumption, increased personnel input, and increased production costs.

Method used

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  • Method for preparing C21 binary acid by using micro-channel technology
  • Method for preparing C21 binary acid by using micro-channel technology
  • Method for preparing C21 binary acid by using micro-channel technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Get raw material oleic acid to carry out methyl esterification reaction, carry out quantitative analysis with GC, adopt area normalization method to calculate and obtain each component content is palmitic acid: oleic acid: linoleic acid=10.1943%: 56.9693%: 32.8364% .

[0043] (2) Put 150 g of oleic acid and 0.098 g of catalyst iodine into an autoclave, replace the air in the autoclave with nitrogen, stir magnetically and heat up to 150° C. for 2 h to obtain an intermediate product.

[0044](3) Connect the reaction device as required, place the pipeline reactor in an oil bath and heat it to 180 degrees.

[0045] (4) Add acrylic acid (n (acrylic acid): n (linoleic acid) = 1.2: 1) to the intermediate product obtained, add acrylic acid quality 1% inhibitor hydroquinone as reactant, under heating condition Stay for 3h, pressurize at 100psi, and collect the reaction product with an Erlenmeyer flask.

[0046] (5) Carry out methyl esterification reaction with the reaction...

Embodiment 2

[0049] Treatment process, treatment time, and pressure are the same as in Example 1, except that the reaction temperature of the oil bath is 170 degrees. The reaction product was taken for methyl esterification reaction, quantitatively analyzed by GC, and the content of each component was calculated by the area normalization method, and the calculated conversion rate was 89%. Spectrum such as Figure 5 Shown, retention time 17.112min represents the peak of linoleic acid, and image 3 The peak area of ​​linoleic acid in the gas phase diagram increases significantly, indicating that the reaction temperature in the pipeline reactor increases and the conversion rate increases. This is because the temperature increases, the effective collision frequency of reactant molecules increases, and the reaction rate accelerates.

Embodiment 3

[0051] The treatment process, treatment time and treatment temperature are the same as in Example 1, except that the reaction pressure in the pipeline reactor is 40 psi. The methyl esterification reaction was carried out on the reaction product, quantitative analysis was carried out by GC, and the content of each component was calculated by the area normalization method, and the calculated conversion rate was 68%. Spectrum such as Figure 6 Shown, retention time 17.145min represents the peak of linoleic acid, and Figure 4 The peak area of ​​oleic acid in the gas phase diagram increases significantly, indicating that the reaction pressure increases and the conversion rate increases.

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Abstract

The invention relates to a method for preparing C21 binary acid by using a micro-channel technology, and belongs to the technical field of surfactant preparation. The method comprises the following steps: putting oleic acid and a catalyst iodine into a high-pressure reaction kettle, introducing nitrogen to replace air in the reaction kettle, magnetically stirring, heating to a specified temperature, and reacting for a period of time; then putting the pipeline reactor into a heating device to be heated to a specified temperature; mixing the obtained kettle liquid of the high-pressure reaction kettle with acrylic acid according to a certain molar ratio, adding a polymerization inhibitor hydroquinone, introducing the mixed liquid into a pipeline reactor by using a constant-flux pump for reaction, and setting the flow velocity on the constant-flux pump; and finally, carrying out reduced pressure distillation on the crude product to obtain the relatively pure C21 dibasic acid. Compared withthe prior art, the method is low in reaction temperature and pressure, short in time, low in energy consumption, small in potential safety hazard and high in production efficiency and economic benefit, and provides important reference for continuous preparation of the surfactant.

Description

technical field [0001] The present invention relates to a kind of utilizing microchannel technology to prepare C 21 The method for dibasic acid belongs to the technical field of surfactant preparation. Background technique [0002] C 21 The C obtained by neutralizing the dibasic acid with KOH 21 Dibasic acid potassium salt anionic surfactant, carboxyl group as hydrophilic group, long-chain hydrocarbon as hydrophobic group, directional adsorption on the two-phase interface in solution, thereby reducing the surface tension of the solution. due to C 21 The two carboxyl groups in the dibasic acid can generate monobasic or dibasic fatty acid derivatives, and the double bond can be added, oxidized and halogenated, so it is also used in the preparation of inks, lubricants, adhesives, epoxy resin curing agents, paint etc. C has not yet been realized in China 21 The independent production of dibasic acid is completely dependent on foreign imports. Strict production conditions a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/353C07C61/22B01J19/00
CPCB01J19/0093C07C51/353C07C2601/16C07C61/22
Inventor 林良良夏远路雯桐温虹钰郭继香李子洋许虎君
Owner JIANGNAN UNIV
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