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Preparation method and application method of alkaline composite oxide catalyst

A composite oxide and catalyst technology, which is used in the preparation of methyl dodecanoate ethoxylate catalyst and the preparation of basic composite oxide catalyst, can solve the problems of difficult to scale industrialization, low catalyst activity, slow reaction speed and the like , to achieve the effects of cheap raw materials, high catalytic activity, and high reusability

Active Publication Date: 2017-09-15
ZHEJIANG HUANGMA NEW MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the research on the ethoxylation of fatty acid methyl esters mainly focuses on the development and improvement of catalysts and the influence of catalysts on product performance. The biggest difficulty in the production of FMEE by direct ethoxylation of fatty acid methyl esters is fatty acid methyl esters. There is no active hydrogen atom in the molecule, unlike fatty alcohols, which are prone to addition reactions, the reaction speed is not only slow, the catalyst activity is low, and the conversion rate is not more than 30%, and a large amount of by-products such as polyethylene glycol, di Esters, etc.; the use of acidic catalysts will cause corrosion of equipment, and it is not easy to scale up industrialization

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  • Preparation method and application method of alkaline composite oxide catalyst
  • Preparation method and application method of alkaline composite oxide catalyst

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Experimental program
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Embodiment 1

[0030] Take by weighing 22.50g magnesium nitrate, 22.68g aluminum nitrate and 251g deionized water respectively, stir and make salt all dissolve and mix homogeneously, salt solution and precipitant (mol ratio is 50% sodium hydroxide and carbonic acid Sodium mixture) was added into a 500ml three-necked flask at the same time, and the pH of the system was kept constant at about 10. It was aged at a constant temperature of 60°C for 8h, and then filtered. After several times of washing, the filter cake was dried in an oven at 65°C for 8h. Then calcined in a muffle furnace at 500°C for 5 hours, crushed into particles and sieved to select a sample with a mesh size of 50-100 mesh as a catalyst.

[0031] Add 0.95 g of the above-mentioned catalyst and 212 g of methyl dodecanoate into a 2.0 L pressure reactor, replace the air in the reactor with nitrogen for 3 times, heat up and vacuumize the water under stirring to remove the moisture in the reaction system. Connect the ethylene oxide ...

Embodiment 2

[0033] Take by weighing 25.22g magnesium nitrate, 19.96g aluminum nitrate and 251g deionized water respectively, stir and make salt all dissolve and mix homogeneously, salt solution and precipitating agent (mol ratio is 50% sodium hydroxide and carbonic acid Sodium mixture) was added into a 500ml three-necked flask at the same time, and the pH of the system was kept constant at about 10. It was aged at a constant temperature of 60°C for 8h, and then filtered. After several times of washing, the filter cake was dried in an oven at 65°C for 8h. Then calcined in a muffle furnace at 500°C for 5 hours, crushed into particles and sieved to select a sample with a mesh size of 50-100 mesh as a catalyst.

[0034] Add 0.95 g of the above-mentioned catalyst and 212 g of methyl dodecanoate into a 2.0 L pressure reactor, replace the air in the reactor with nitrogen for 3 times, heat up and vacuumize the water under stirring to remove the moisture in the reaction system. Connect the ethylen...

Embodiment 3

[0036] Take by weighing 38.23g magnesium nitrate, 22.01g aluminum nitrate and 251g deionized water respectively, stir and make salt all dissolve and mix homogeneously, salt solution and precipitant (mol ratio is 50% sodium hydroxide and carbonic acid Sodium mixture) was added into a 500ml three-necked flask at the same time, and the pH of the system was kept constant at about 10. It was aged at a constant temperature of 60°C for 8h, and then filtered. After several times of washing, the filter cake was dried in an oven at 65°C for 8h. Then calcined in a muffle furnace at 500°C for 5 hours, crushed into particles and sieved to select a sample with a mesh size of 50-100 mesh as a catalyst.

[0037]Add 0.95 g of the above-mentioned catalyst and 212 g of methyl dodecanoate into a 2.0 L pressure reactor, replace the air in the reactor with nitrogen for 3 times, heat up and vacuumize the water under stirring to remove the moisture in the reaction system. Connect the ethylene oxide s...

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Abstract

The present invention relates to a preparation method and an application method of an alkaline composite oxide catalyst, and belongs to the technical field of synthesis of fatty acid methyl ester ethoxylate. The preparation method comprises: mixing a metal salt solution and a precipitating agent to obtain a mixture; controlling the temperature of the solution, and maintaining the pH value of the solution at 8.0-10.0 during the mixing process; standing and aging the obtained solution, carrying out suction filtration, and washing the filter cake; and drying the filter cake, calcining, and screening to achieve a certain mesh to obtain the catalyst. According to the present invention, with the application of the catalyst in preparation of methyl laurate ethoxylates, the high catalytic activity can be provided, the reactivity of the catalyst can be up to 5.32 gEO / gCat / in, and the reuse rate of the catalyst is high.

Description

technical field [0001] The invention relates to the technical field of synthesis of fatty acid methyl ester ethoxylates, in particular to the preparation of a basic composite oxide catalyst and a method for preparing the catalyst of methyl dodecanoate ethoxylates. Background technique [0002] Fatty-acid Methyl Esters Ethoxylates (Fatty-acid Methyl Esters Ethoxylates, abbreviated as FMEE) is a new variety developed in recent years. Compared with AEO series alcohol polyoxyethylene ethers, FMEE has low foam, excellent dispersion and cleaning And good low temperature fluidity, more convenient to use. FMEE has a structure similar to grease and wax, and has a strong degreasing and degreasing ability, especially the outstanding dispersing power, which can effectively prevent the anti-pollution of dirt during the cleaning process. The degreasing ability is better than that of AEO series. It is suitable for industrial cleaning, daily chemicals, oil flooding, coal flotation, textile...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/10C07C69/28C07C67/26
CPCB01J21/10B01J23/002B01J23/02C07C67/26C07C69/28
Inventor 刘佳万庆梅金一丰王月芬刘志湘余渊荣
Owner ZHEJIANG HUANGMA NEW MATERIALS TECH CO LTD
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