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Method for preparing hydroxyacetic acid by cellulose-enriched biomass

A technology of glycolic acid and biomass, which is applied in the field of preparation of glycolic acid, can solve the problems that have not been reported, and achieve the effect of low price, simple steps and easy control

Active Publication Date: 2015-04-29
湖州观辰生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the prior art has involved the conversion of cellulose into important chemicals such as ethanol, ethylene glycol, and lactic acid through glucose, the technology for preparing glycolic acid from cellulose has not been reported yet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The cellulose-rich biomass used in this example is cardboard dried in an oven at 80°C.

[0021] The photodegradation reaction of cellulose was carried out in a disc-shaped open glass container with a diameter of 10 cm. The reactor is placed directly under the ultraviolet light source, the wavelength of the ultraviolet light is 365nm, the power is 500W, and the distance between the cardboard surface and the ultraviolet light source is 8cm.

[0022] The implementation steps of this embodiment are as follows:

[0023] First place 1 g of cardboard in a disc-shaped glass container, and then place the container in an ice-water bath. Use dilute hydrochloric acid to adjust the pH of hydrogen peroxide with a mass concentration of 30% to about 4, then take hydrogen peroxide equivalent to 1000% cardboard quality and add it to the container to completely soak the cardboard, then add zinc chloride with 20% cardboard quality, Finally, slowly add 1mL of 1% ferrous chloride solution ...

Embodiment 2

[0026] The cellulose-rich biomass used in this example is medical absorbent cotton dried in an oven at 80°C.

[0027] The photodegradation reaction of cellulose was carried out in a disc-shaped open glass container with a diameter of 10 cm. The reactor is placed directly under the ultraviolet light source, the wavelength of the ultraviolet light is 365nm, the power is 500W, and the distance between the surface of the absorbent cotton and the ultraviolet light source is 8cm.

[0028] The implementation steps of this embodiment are as follows:

[0029] Put 1 g of absorbent cotton in a disk-shaped glass container, and place the disk in an ice-water bath. Use dilute sulfuric acid to adjust the pH of hydrogen peroxide with a mass concentration of 30% to about 5, then take hydrogen peroxide equivalent to 500% of the mass of absorbent cotton and add it to the container to completely soak the absorbent cotton, then add zinc sulfate with a mass of 30% of absorbent cotton, and finally ...

Embodiment 3

[0032] The cellulose-rich biomass used in this example is poplar wood powder dried in an oven at 80°C.

[0033] The photodegradation reaction of cellulose was carried out in a disc-shaped open glass container with a diameter of 10 cm. The reactor is placed directly under the ultraviolet light source, the wavelength of the ultraviolet light is 365nm, the power is 500W, and the distance between the poplar wood flour surface and the ultraviolet light source is 8cm.

[0034] The implementation steps of this embodiment are as follows:

[0035] 1g of poplar wood powder was placed in a disc-shaped glass container, and the disc was placed in an ice-water bath. Use dilute sulfuric acid to adjust the pH of hydrogen peroxide with a mass concentration of 30% to about 3, then take hydrogen peroxide equivalent to 1000% of poplar wood powder and add it to the container to completely soak the poplar wood powder, then add 50% of poplar wood powder with sulfuric acid Zinc, and finally slowly ...

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Abstract

The invention discloses a method for preparing hydroxyacetic acid by cellulose-enriched biomass. The method comprises the following steps: by taking cellulose-enriched biomass as a raw material, infiltrating the cellulose-enriched biomass in an oxidizing agent which is adjusted to weakly acidic by virtue of a pH adjustor; by taking ferrite as a Fenton reaction catalyst and zinc salt as a secondary catalyst, carrying out Fenton reaction under a lighting condition; and after reaction, filtering and separating to obtain the hydroxyacetic acid. The method disclosed by the invention generates free radicals by virtue of photo-stimulated Fenton reaction and is matched with the secondary catalyst at the same time to selectively regulate the product. The method for preparing hydroxyacetic acid is simple in step, free of heating and pressurizing and easy to control; the catalyst used is low in price and no organic solvents are required in the degrading process; and the product is prepared and converted under a mild condition. Compared with existing petroleum-based small molecular raw material conversion method, the method is the hydroxyacetic acid production method which is huge in potential and efficient and economical.

Description

technical field [0001] The invention relates to a method for preparing glycolic acid, in particular to a method for preparing glycolic acid from cellulose-rich biomass. Background technique [0002] Glycolic acid, also known as glycolic acid or glycolic acid, is the simplest aliphatic hydroxy acid. It mainly exists in sugar cane, beet and immature grapes in nature, but the content is low. Glycolic acid is an important organic synthesis intermediate and chemical product with a wide range of applications: it can be used as a cleaning agent (such as 2% glycolic acid and 1% formic acid to form a mixed acid is a high-efficiency and low-cost Cleaning agents, suitable for cleaning air conditioners and descaling supercritical boilers), bactericides, fiber dyes, detergents, ingredients for welding agents, varnish ingredients, copper corrosion agents, adhesives, petroleum demulsifiers and metal chelating agents Wait. Sodium and potassium salts of glycolic acid can be used as electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C59/06C07C53/02C07C51/285
CPCC07C51/31C07C59/06
Inventor 佘振朱锦那海宁倪金平
Owner 湖州观辰生物科技有限公司
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