Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of furfural and xylose

A technology of furfural and xylose, which is applied in the field of preparation of furfural and xylose, can solve the problems of increasing reaction steps, increasing costs, failing to solve equipment fouling, etc., and achieves the effect of no fouling in the reaction steps and simple reaction steps

Active Publication Date: 2018-05-29
JINAN SHENGQUAN GROUP SHARE HLDG
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method fails to solve the problem of fouling of equipment catalyzed by inorganic acids
However, the preparation of furfural in the prior art also requires sulfuric acid or enzymes to hydrolyze the sugar solution to prepare furfural, which not only increases the reaction steps, but also increases the cost.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] The invention provides a kind of preparation method of furfural, comprising:

[0022] The lignin raw material is acidolyzed under the action of a catalyst to obtain a sugar solution; the catalyst includes a non-oxidizing acid and sulfite; the non-oxidizing acid includes a first non-oxidizing acid and a second non-oxidizing acid; The first non-oxidizing acid is sulfurous acid;

[0023] The dehydration reaction of the sugar solution yields furfural.

[0024] In the present invention, firstly, the lignin raw material is acidolyzed under the action of a catalyst to obtain sugar liquid. The present invention does not limit the lignin raw material, which is preferably selected from corn cobs, reeds, bean stalks, cotton stalks, wheat straw, corn straw, poplar wood, bamboo, coniferous wood, broad-leaved wood, melon seed shells, and melon seed stalks One or more; more preferably corncob or reed; most preferably corncob. The raw material of the present invention is preferably ...

Embodiment 1

[0050] Grind 100g corncobs, add 5g sulfurous acid, 5g phosphoric acid, 0.6g sodium sulfite to hydrolyze at 110°C and 0.4Mpa to obtain sugar liquid; after solid-liquid separation, obtain sugar liquid and lignocellulose; combine sugar liquid, add lignocellulose Wash four times at 100°C, and after solid-liquid separation, sugar solution and lignocellulose are obtained; the sugar solution is combined, and lignocellulose is washed twice at 100°C, and the sugar solution is obtained after solid-liquid separation, and combined to obtain sugar solution.

[0051] The sugar liquid is dehydrated for 100 minutes under the mixed catalyst of 2g calcium dihydrogen phosphate, 4g phosphoric acid, 1g magnesium sulfate, 1g potassium dihydrogen phosphate and 4g water at 160°C and 0.8MPa pressure to obtain the furfural stock solution, which is obtained by refining the furfural stock solution furfural. Detected by gas chromatography, the purity of furfural was 99.0%, and the yield was 76.0%.

Embodiment 2

[0053] Grind 200g corncobs, add 13g sulfurous acid, 3g oxalic acid, and 1.1g sodium sulfite to hydrolyze at 160°C and 0.5Mpa to obtain sugar solution; after solid-liquid separation, sugar solution and lignocellulose are obtained; combine sugar solution, add lignocellulose Six times of washing at 100°C, solid-liquid separation, to obtain sugar solution and lignocellulose; combined sugar solution, lignocellulose was added to four times of 90°C water washing, solid-liquid separation to obtain sugar solution, combined to obtain sugar solution.

[0054] The sugar liquid is dehydrated for 100 minutes under the mixed catalyst of 2g calcium dihydrogen phosphate, 4g phosphoric acid, 1g magnesium sulfate, 1g potassium dihydrogen phosphate and 4g water at 160°C and 0.8MPa pressure to obtain the furfural stock solution, which is obtained by refining the furfural stock solution furfural. Detected by gas chromatography, the purity of furfural was 99.3%, and the yield was 72.5%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method for preparing furfural and xylose. The method comprises the steps that a xylogen raw material is subjected to acidolysis under the action of a catalyzer, so that liquid glucose is obtained, wherein the catalyzer comprises non-oxidized acid and sulfite, the non-oxidized acid comprises first non-oxidized acid and second non-oxidized acid, and the first non-oxidized acid is sulphurous acid; the dehydration reaction is conducted on the liquid glucose, so that furfural is obtained. According to the method for preparing furfural and xylose, the compatibility of the specific non-oxidized acid and the sulfite is taken as the catalyzer, in this way, hydrolyzation can be conducted on the xylogen raw material more sufficiently, post-hydrolyzation is not needed in the whole furfural preparing process, the reaction steps are simpler, and scaling is avoided.

Description

technical field [0001] The invention relates to the field of biochemical technology, in particular to a method for preparing furfural and xylose. Background technique [0002] The agricultural wastes formed in our country are as high as 70,000 tons every year, and most of them are burned or discarded, which wastes a lot of useful resources and causes environmental pollution. And my country is the second largest corn producer in the world, and the corn output is second only to rice and occupies the second place, and the output accounts for about 1 / 4 of the national total grain output. my country's corn production areas are widely distributed. The corn belt spans the cold temperate zone, warm temperate zone, subtropical zone and tropical ecological zone, and is distributed in different natural conditions such as lowland plains, hills and plateau mountains. In 2013, my country's corn production reached 201.1 billion tons. Corn cobs are obtained by crushing corn cobs. The lig...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C07D307/50C07H3/02C07H1/08
CPCC07D307/50C07H1/08C07H3/02
Inventor 唐一林江成真高绍丰张茜刘洁
Owner JINAN SHENGQUAN GROUP SHARE HLDG