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A kind of hydrolysis catalyst and preparation method thereof and method for preparing succinaldehyde

A catalyst, the technology of dimethoxytetrahydrofuran, which is applied in the field of catalysis, can solve the problems of high comprehensive cost of succinic dialdehyde raw materials, high cost of succinic dialdehyde, and reduction of the yield of succinic dialdehyde, so as to facilitate market expansion and use and application Broad prospects and potential, the effect of increasing hydrolysis yield

Inactive Publication Date: 2018-07-03
ZHONGSHAN POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The raw material cost of 2,5-dimethoxytetraoxyfuran is high, and the current price is not less than 300 yuan / kg, which makes the cost of the hydrolyzed product succinic dialdehyde very expensive
On the other hand, the post-processing of the traditional hydrolysis reaction process is quite difficult, and the process is complicated and numerous, which further reduces the yield of succinic dialdehyde, which directly leads to a more expensive comprehensive cost of raw materials for succinic dialdehyde (it is estimated to be as high as 500 yuan / kg).

Method used

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  • A kind of hydrolysis catalyst and preparation method thereof and method for preparing succinaldehyde
  • A kind of hydrolysis catalyst and preparation method thereof and method for preparing succinaldehyde

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The hydrolysis catalyst was prepared according to the following steps:

[0049] (1) Add 1 part of AlCl 3Stir well and completely dissolve in 20 parts of triethanolamine to prepare a precursor solution;

[0050] (2) Disperse 30 parts of Na-based montmorillonite (produced by Zhejiang Fenghong New Material Co., Ltd., its purity is as high as 99%, the same below) in 90 parts of water to prepare a clay suspension, and the precursor prepared in (1) The body solution and the clay suspension are fully mixed evenly;

[0051] (3) The reaction liquid obtained in step (2) is filtered, and the filter cake is fully washed, and the filter cake is fully dried at 80~120°C, taken out, and ground to make the particle size not less than 2000 mesh to obtain a powder;

[0052] (4) 1.5 parts (NH 4 ) 2 SO 4 Add 0.3 parts of cetyltrimethylammonium bromide into 7.5 parts of water, stir until completely dissolved and mix well, then put in the powder prepared in (3), and fully dry at 100-150°...

Embodiment 2

[0054] The hydrolysis catalyst was prepared according to the following steps:

[0055] (1) Add 0.5 parts of AlCl 3 and 0.5 parts FeCl 3 Stir well and completely dissolve in 50 parts of triethanolamine to prepare a precursor solution;

[0056] (2) Disperse 5 parts of Na-based montmorillonite and 5 parts of Na-based bentonite (produced by Zhejiang Fenghong New Material Co., Ltd., the former has a purity of 99% and the latter has a purity of 83%, the same below) in 100 parts of water to prepare clay Suspension, and (1) fully mix the prepared precursor solution and clay suspension;

[0057] (3) The reaction liquid obtained in step (2) is filtered, and the filter cake is fully washed, and the filter cake is fully dried at 80~120°C, taken out, and ground to make the particle size not less than 2000 mesh to obtain a powder;

[0058] (4) 2 parts (NH 4 ) 2 SO 4 Add 0.1 part of cetyltrimethylammonium bromide and 0.1 part of octadecyltrimethylammonium bromide into 60 parts of water...

Embodiment 3

[0060] The hydrolysis catalyst was prepared according to the following steps:

[0061] (1) Add 0.5 parts of AlCl 3 , 0.2 parts of FeCl 3 and 0.2 parts TiCl 4 Stir well and completely dissolve in 27 parts of triethanolamine to prepare a precursor solution;

[0062] (2) Prepared by dispersing 5 parts of Na-based montmorillonite, 2 parts of Na-based bentonite and 5 parts of Na-based hectorite (produced by Nanjing Hemingsi New Material Co., Ltd., with a purity of up to 99%, the same below) in 60 parts of water Clay suspension, and (1) fully mix the prepared precursor solution and clay suspension;

[0063] (3) The reaction liquid obtained in step (2) is filtered, and the filter cake is fully washed, and the filter cake is fully dried at 80~120°C, taken out, and ground to make the particle size not less than 2000 mesh to obtain a powder;

[0064] (4) 1.6 parts (NH 4 ) 2 SO 4 , 0.1 part of cetyltrimethylammonium bromide, 0.05 part of cetyltrimethylammonium chloride and 0.05 pa...

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Abstract

The invention belongs to the technical field of catalysis, and discloses a hydrolysis catalyst. The hydrolysis catalyst uses a clay interlayer structure doped with polyvalent metal ions as a skeleton, and the skeleton supports SO42-, and the clay interlayer structure also contains quaternary ammonium Salt. The invention also discloses a preparation method of the hydrolysis catalyst and a method for preparing succinaldehyde with the hydrolysis catalyst. The hydrolysis catalyst of the present invention is clay-loaded SO42-solid superacid, its catalytic efficiency is efficient, can obviously improve the hydrolysis yield of succinic dialdehyde, and shorten reaction time, to 2, the hydrolysis of 5-dimethoxytetraoxyfuran The catalytic activity is better than that of hydrochloric acid, sulfuric acid, etc. commonly used today, and the separation and recovery of the catalyst is very simple, which not only makes the hydrolysis reaction mild, the production cost is lower, and it is more environmentally friendly, it can replace the currently commonly used hydrochloric acid, sulfuric acid, phosphoric acid, etc. And harmful liquid acid catalysts, the application prospect and potential are very broad.

Description

technical field [0001] The invention belongs to the technical field of catalysis, relates to a hydrolysis catalyst and a preparation method thereof, and also relates to a method for preparing succinaldehyde with the hydrolysis catalyst. Background technique [0002] Cyclopyrid is a new neonicotinoid insecticide with independent intellectual property rights invented by East China University of Science and Technology. It has high chemical activity against imidacloprid-resistant pests and has a good control effect on Lepidoptera pests. In 2011, East China University of Science and Technology transferred the patented technology of Cyclopyrid to Shanghai Shengnong Biochemical Products Co., Ltd., and then East China University of Science and Technology, Shanghai Shengnong Biochemical Products Co., Ltd. cooperated with FMC Corporation of the United States for industrial development. [0003] The independent development of cycloxaprid shows that my country has the ability to indepen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/38C07C45/59C07C47/12
CPCY02P20/584
Inventor 李吉昌聂建华韩淑琴刘洋黎萍
Owner ZHONGSHAN POLYTECHNIC