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Method for preparing sodium carboxymethylcellulose from residues generated by producing biobutanol from maize straw

A technology of sodium carboxymethyl cellulose and corn stalk fiber is applied in the field of waste recycling for producing bio-butanol from corn stalks, which can solve the problem of high production cost of sodium carboxymethyl cellulose, promote industrial development, and solve the problem of raw materials. lack of effect

Inactive Publication Date: 2012-02-22
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] In order to solve the disadvantage of high production cost of sodium carboxymethylcellulose existing in the prior art, the present invention provides a method for preparing sodium carboxymethylcellulose from residues of bio-butanol produced from corn stalks. Alcoholic corn stalk residues are used as raw materials, turning waste into treasure and reducing the production cost of sodium carboxymethyl cellulose

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Crush the corn stalks and put them into the steam explosion tank. After sealing it, let water steam in so that the tank pressure is 15-17kg / cm2, keep it at about 170°C for 4-5 minutes, and release the pressure quickly to make the steam-exploded corn stalks. After breaking the news through hemicellulase enzymolysis, use Clostridium acetobutylicum to ferment to produce bio-butanol, the remaining residue is extracted with alkali to extract lignin, then bleached with hydrogen peroxide, washed twice with tap water, centrifuged and dried, and dried to obtain corn Straw fiber slurry: using the fiber slurry as raw material, adopting the method of solvent kneading, and undergoing conventional alkalization, etherification, washing and drying steps to obtain sodium carboxymethyl cellulose.

[0021] The alkalization step is: after pulverizing the corn fiber slurry, weighing 75 parts by weight and putting it into a kneader, mixing 70 parts by weight of 45% to 55% wt of sodium hydroxi...

Embodiment 2

[0027] The corn stalks are crushed and lignin is extracted with lye, and the remaining material is enzymatically hydrolyzed by hemicellulase, then fermented by Clostridium acetobutylicum to produce bio-butanol, and then washed, centrifuged and dried to obtain fiber slurry ; Taking fiber slurry as raw material, adopting the method of solvent kneading, and obtaining sodium carboxymethyl cellulose after conventional alkalization, etherification, washing and drying steps.

[0028] The alkalization step is as follows: after pulverizing the fiber slurry, weigh 150 parts by weight and put it into a kneader, mix 140 parts by weight of 45% to 55% wt of sodium hydroxide solution and 240 parts by weight of industrial grade ethanol Mix evenly. After starting the stirring, sprinkle the mixture of sodium hydroxide and ethanol evenly on the corn stalk powder, stir and alkalize at 10-30°C for 0.5-1.5 hours, and make the cellulose in the slurry into alkali cellulose ;

[0029]The etherificati...

Embodiment 3

[0034] First crush the corn stalks, extract the lignin in the stalks with an alkaline solution, and after the purified materials are enzymatically hydrolyzed with hemicellulase, they are fermented with Clostridium acetobutylicum to produce bio-butanol. % hydrogen peroxide was bleached at 70°C for 2 hours, washed twice with tap water, centrifuged and dried to obtain fiber slurry; the fiber slurry was used as raw material, and the method of solvent kneading was used to undergo conventional alkalization and etherification. , washing and drying to obtain sodium carboxymethyl cellulose.

[0035] The alkalization step is: after pulverizing the fiber slurry, weighing 110 parts by weight and putting it into a kneader, mixing 110 parts by weight of 45% to 55% wt of sodium hydroxide solution and 190 parts by weight of industrial grade ethanol Mix evenly. After starting the stirring, sprinkle the mixture of sodium hydroxide and ethanol evenly on the corn stalk powder, stir and alkalize a...

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Abstract

The invention discloses a method for preparing sodium carboxymethylcellulose from residues generated by producing biobutanol from maize straw. A by-product fiber slurry during production of biobutanol from the maize straw is taken as a raw material, and is subjected to pulverization, basification, etherification, washing, centrifugation, drying, pulverization and sieving to prepare the finished sodium carboxymethylcellulose. The residues generated in the process of producing the biobutanol from the maize straw are utilized fully and changed into treasure, so the industrial development of the production of the biobutanol from the maize straw is promoted, and the problems of deficient raw materials and high production cost during the production of the sodium carboxymethylcellulose are solved. The appearance of the prepared sodium carboxymethylcellulose is white or faint yellow powder, the pH value is between 6.0 and 8.5, the moisture content is less than or equal to 10 percent, the degree of substitution is between 0.6 and 1.2, the viscosity is between 35 and 6,500 mPa.s, and the chloride content is less than or equal to 1.2 percent; and the sodium carboxymethylcellulose has excellent performance, and can be applied in the industry such as daily chemical engineering, papermaking, oil exploitation and the like.

Description

technical field [0001] The invention relates to the field of preparation methods of sodium carboxymethyl cellulose, in particular to the reuse of wastes produced from corn stalks to produce bio-butanol. Background technique [0002] With the rapid development of the global economy, the increasing shortage of petroleum resources and the aggravation of environmental pollution, people pay more and more attention to the research and development of clean and renewable biomass energy. As a renewable resource with rich sources and low price, corn stalks can produce about 300 million tons per year in my country, but most of them are burned or discarded directly, causing serious resource waste and environmental pollution problems. Its research and utilization is An important research direction of biomass energy in the future. The use of corn stalks to produce the second-generation biofuel, bio-butanol, has broad application prospects. However, the amount of corn stalk residues produc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B11/12
Inventor 储富祥王春鹏韩春国金铁岭庄晓伟张伟李守海
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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