Method for preparing solid sulphoacid by catalyzing carbohydrate

A technology for the preparation of carbohydrates and catalysis, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of long time and high energy consumption, and achieve reduced energy consumption, high acid content, water good thermal stability

Inactive Publication Date: 2007-04-25
HUNAN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nevertheless, its preparation process requires high energy consumption and a long time, which needs to be improved

Method used

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  • Method for preparing solid sulphoacid by catalyzing carbohydrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] In 100kg of 80% (mass percent) sulfuric acid solution, stir and add 10kg of glucose, react at a constant temperature of 80°C for 3h, add deionized water after cooling, repeatedly wash and suction filter until the filtrate is neutral, and dry at 100°C to obtain the product glucose Charcoal 3.9kg. Take 3.9 kg of the obtained glucose charcoal, add 27.3 kg of chlorosulfonic acid, sulfonate at a constant temperature of 60 °C for 4 hours, wash the product repeatedly with boiling deionized water after cooling, and filter it with suction until it is dissolved in BaCl 2 Solution detection filtrate BaSO free 4 White precipitate, that is, no sulfuric acid in the filtrate, dried at 100°C to obtain 5.76kg of glucose charcoal-type solid sulfonic acid, and titrated to obtain an acid content of 2.50mmolg -1 .

[0016] The above obtained product glucose charcoal-type solid sulfonic acid is determined to be a solid sulfonic acid containing a sulfonic acid group through infrared spectro...

Embodiment 2

[0019] Add 10kg of sucrose to 63.2kg of 95% (mass percent) sulfuric acid solution, stir and react at a constant temperature of 120°C for 3h, add deionized water after cooling, repeatedly wash and filter with suction until the filtrate is neutral, and dry at 100°C to obtain sucrose charcoal 5.9 kg. Take 5.9kg of the obtained sucrose charcoal, add 41.3kg of concentrated sulfuric acid, sulfonate at 80°C for 2 hours, wash the product repeatedly with boiling deionized water after cooling, and filter it with suction until it is completely dissolved in BaCl 2 Solution detection filtrate BaSO free 4 White precipitate, that is, no sulfuric acid in the filtrate, was dried at 100° C. to obtain 7.15 kg of sucrose charcoal-type solid sulfonic acid. The amount of this sulfonic acid obtained by titration is 2.53mmolg -1 .

[0020] The sucrose charcoal-type solid sulfonic acid obtained above is determined to be a solid sulfonic acid containing a sulfonic acid group through infrared spectro...

Embodiment 3

[0023] Take 10kg of starch, add 107kg of 75% (mass percent) sulfuric acid solution, stir and react at a constant temperature of 80°C for 3h, add deionized water after cooling, repeatedly wash and suction filter until the filtrate is neutral, and dry at 100°C to obtain starch charcoal 4.6 kg. Get 4.6 kg of the resulting starch charcoal, add 23.0 kg of 50% (mass percent) fuming sulfuric acid, sulfonate at 120 ° C for 2 h, wash the product repeatedly with boiling deionized water after cooling, and suction filter until the product is washed with BaCl 2 Solution detection filtrate BaSO free 4 The white precipitate, that is, no sulfuric acid in the filtrate, was dried at 100° C. to obtain 5.71 kg of starch-charcoal solid sulfonic acid. The amount of starch charcoal solid sulfonic acid obtained by titration is 2.12mmolg -1 .

[0024] The starch charcoal solid sulfonic acid obtained above is determined to be a solid sulfonic acid containing sulfonic acid groups through infrared spe...

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Abstract

The invention relates to a method for using carbohydrate catalyst to produce solid sulfonic acid. Wherein, it comprises that, in the 65-95% sulfuric acid, mixing sulfuric acid and carbohydrate at 3-20:1, adding carbohydrate material, mixing and carbonizing at 40-200Deg. C; cooling and adding deionized water; washing and filtering until it is neutral; drying, shaping to obtain carbonized particles; adding sulphonating agent while the ratio between sulphonating agent and carbonized particles is 3-15:1, sulphonating for 1-20h at 30-150Deg. C; cooling and using boiled deionized water to wash the product and filtering until there is no sulphuric acid, drying to obtain the solid sulfonic acid. The invention uses sulphuric acid carbonization method, to shorten the reaction period and reduce energy consumption, while the product has high stability.

Description

technical field [0001] The invention belongs to a preparation method of a catalyst, in particular to a preparation method of solid sulfonic acid. Background technique [0002] Carbohydrates are the most abundant organic matter in nature, and they mainly exist in plants, accounting for 50-80% of the proportion of plants. It can be divided into three categories: monosaccharides, such as glucose, fructose, galactose, and mannose; oligosaccharides (mostly disaccharides), such as sucrose, maltose, lactose, and cellobiose; polysaccharides, such as starch and dextrin , glycogen, cellulose, hemicellulose and pectin. Carbohydrates are the main energy-supplying nutrient for the human body. They are essential components of cells and tissues, and can maintain the normal function of brain cells. Its physiological effects are well known, and its main applications are also in the fields of medicine, health care, food, and daily chemical industry, and it has not yet involved the applicati...

Claims

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Application Information

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IPC IPC(8): B01J27/053B01J21/18
Inventor尹笃林徐琼毛丽秋兰支利王季惠王艺娟张锋
OwnerHUNAN NORMAL UNIVERSITY