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A kind of sulfonic acid ion catalyst, its preparation method and its application

A technology of sulfonic acid ions and catalysts, applied in chemical instruments and methods, physical/chemical process catalysts, applications, etc., can solve the problems of relatively harsh reaction conditions, high production costs, long reaction time, etc., and achieve easy post-processing , Excellent effect, simple process effect

Active Publication Date: 2018-09-28
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Traditional cellulose hydrolysis is mainly carried out by acid catalysis. Catalysts such as sulfuric acid and hydrochloric acid have problems such as relatively long reaction time during use, serious degradation of the sugar generated by the reaction, and relatively harsh reaction conditions during the hydrolysis process. High temperature and high pressure are required, especially when high-concentration acid is used as a catalyst, and the reaction container is required to have strong acid resistance, so special reaction equipment is required. From an economic point of view, higher production costs are required

Method used

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  • A kind of sulfonic acid ion catalyst, its preparation method and its application
  • A kind of sulfonic acid ion catalyst, its preparation method and its application
  • A kind of sulfonic acid ion catalyst, its preparation method and its application

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Experimental program
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Effect test

Embodiment 1

[0028] Preparation of sulfonic acid ion catalyst:

[0029]

[0030] Add 4.25g of 5-amino-1H-tetrazole and 50mL of absolute ethanol into a 100mL single-necked flask, stir and heat to 50°C to fully dissolve them, then add 12.2g of 1,3-propane sultone dropwise for 25min After the addition of 1,3-propane sultone was completed, the reaction was continued for 24 hours, and then the reaction product was allowed to stand at room temperature, and the white solid product was collected by filtration, and then washed 3 times with 10 mL of absolute ethanol, and finally the white solid Vacuum-dried for 12 hours at a temperature of 100°C and a vacuum of 0.1Mpa to obtain a sulfonic acid ion catalyst as a white solid; IR v max 3072,1780,1690,1516,1458,1383,1322,1293,1246,1228,1190,1154,1101,1039,1026,976,938,848,824,807,782,747,668,593cm -1 .MS(ESI)m / z 330[M+H] + . 1 H NMR (400MHz,D 2 O) δ9.26 (s, 2H), 4.39 (t, J = 6.8Hz, 4H), 2.69 (t, J = 7.1Hz, 4H), 2.23–2.08 (m, 4H).

Embodiment 2

[0032] Preparation of sulfonic acid ion catalyst:

[0033]

[0034] Add 4.25g of 5-amino-1H-tetrazole and 50mL of absolute ethanol into a 100mL one-necked flask, stir and heat to 50°C to fully dissolve them, then add 15.2g of 1,3-propane sultone dropwise for 25min After the addition of 1,3-propane sultone was completed, the reaction was continued for 18 hours, and then the reaction product was allowed to stand at room temperature, and the white solid product was collected by filtration, and then washed 3 times with 10 mL of absolute ethanol, and finally the white solid Vacuum-dried for 14 hours at a temperature of 100°C and a vacuum of 0.1Mpa to obtain a sulfonic acid ion catalyst as a white solid; IR v max 3072,1780,1690,1516,1458,1383,1322,1293,1246,1228,1190,1154,1101,1039,1026,976,938,848,824,807,782,747,668,593cm -1 .MS(ESI)m / z 330[M+H] + . 1 H NMR (400MHz,D 2 O) δ9.26 (s, 2H), 4.39 (t, J = 6.8Hz, 4H), 2.69 (t, J = 7.1Hz, 4H), 2.23–2.08 (m, 4H), thus the embodimen...

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Abstract

The invention discloses a sulfonic acid ion catalyst, a preparation method and an application thereof. A structural formula of the sulfonic acid ion catalyst is shown in a specification. The synthetic method of the sulfonic acid ion catalyst has the advantages of simple process, mild condition, high yield, and simple post-treatment. The sulfonic acid ion catalyst has high catalysis efficiency for hydrolysis of cellulose.

Description

technical field [0001] The invention relates to a sulfonic acid ion catalyst, its preparation method and application, and belongs to the field of organic synthesis. Background technique [0002] Concentrated acids are widely used in industrial catalysis fields such as esterification, rearrangement, and hydrolysis. The cost of using concentrated acid is low, but it has serious corrosion on equipment, many side reactions, cumbersome post-treatment and serious environmental pollution. For a long time, scientific researchers have done a lot of work in exploring and improving acidic catalysts, such as using acidic cation exchange resins, molecular sieves, heteropolyacids and solid superacids to replace concentrated acids to solve equipment corrosion and pollution problems. [0003] The sugars produced by hydrolysis of cellulose are mainly glucose, pentose and fructose, and the obtained sugars can be further dehydrated to obtain platform compounds such as levulinic acid, formic a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/02C07D257/06C13K1/02
CPCB01J31/0244C07D257/06C13K1/02
Inventor 沈明贵杨艳平商士斌王丹宋杰
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY