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Method for preparing surfactant from tanning leftovers through enzymatic hydrolysis

A technology of surfactants and leftovers is applied in the field of preparation of protein-based surfactants, which can solve problems such as the lack of preparation of surfactants, and achieve the effects of easily degradable by-product content, strong operability, and easy promotion.

Active Publication Date: 2012-04-11
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The results of literature review show that there is no report on the preparation of surfactants by enzymatic hydrolysis of tanning waste

Method used

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  • Method for preparing surfactant from tanning leftovers through enzymatic hydrolysis
  • Method for preparing surfactant from tanning leftovers through enzymatic hydrolysis
  • Method for preparing surfactant from tanning leftovers through enzymatic hydrolysis

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Add 100 parts of pigskin scraps to 800 parts of water, soak at 40°C for 4 hours, add 2 parts of sodium hydroxide, stir and react at 40°C for 2 hours, then add 0.2 parts of 1398 protease, stir and react at 50°C for 4 hours, heat up Heat to 100°C, inactivate enzyme activity for 5 minutes, cool and filter to obtain collagen hydrolyzate.

[0034]Add 100 parts of collagen hydrolyzate to the reaction kettle, add 20 parts of ethanol and 10 parts of 20% NaOH aqueous solution respectively, then stir and drop 10 parts of oleic acid chloride at 30°C, react for 4 hours under cooling reflux, and close the cooling reflux device React for another 3 hours to obtain protein-based surfactant (CBS-1).

Embodiment 2

[0036] Add 100 parts of sheepskin scraps to 600 parts of water, soak at 60°C for 2 hours, add 3 parts of calcium hydroxide, stir and react at 60°C for 4 hours, then add 0.4 parts of 1398 protease, stir and react at 60°C for 2 hours, and heat up to 100°C, inactivate enzyme activity for 5 minutes, cool and filter to obtain collagen hydrolyzate.

[0037] Add 100 parts of collagen hydrolyzate to the reaction kettle, add 30 parts of acetone and 15 parts of 30% NaOH aqueous solution respectively, then add 20 parts of lauric acid chloride dropwise with stirring at a temperature of 50°C, react for 2 hours under cooling reflux, and close the cooling reflux The device was reacted for another 1.5h to obtain protein-based surfactant (CBS-2).

Embodiment 3

[0039] Add 100 parts of cowhide scraps to 500 parts of water, soak at a temperature of 30°C for 4 hours, add 5 parts of ammonium sulfate, stir and react at a temperature of 40°C for 4 hours, then add 0.5 parts of 537 protease, stir and react at a temperature of 40°C for 4 hours, and raise the temperature to 100 °C, inactivate the enzyme for 7 minutes, cool and filter to obtain collagen hydrolyzate.

[0040] Add 100 parts of collagen hydrolyzate to the reaction kettle, add 10 parts of acetone and 30 parts of 10% NaOH aqueous solution respectively, then stir and drop 20 parts of linoleic acid chloride at 40°C, react under cooling reflux for 2 hours, close the cooling reflux The device was reacted for another 4 hours to obtain protein-based surfactant (CBS-3).

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Abstract

The invention discloses a method for preparing a surfactant from tanning leftovers through enzymatic hydrolysis. The method is characterized by comprising the following steps of: (1) adding 100 parts by weight of tanning leftovers in 500-900 parts by weight of water, soaking for 0.5-4.0 hours at the temperature of 30-60 DEG C, adding 1-5 parts by weight of fiber dispersing agent, stirring for reacting for 0.5-4.0 hours at the temperature of 30-60 DEG C, adding 0.2-0.8 part by weight of protease, stirring for reacting for 2-8 hours at the temperature of 30-70 DEG C, raising the temperature to 100 DEG C, inactivating for 5-10 minutes, cooling and filtering to obtain hydrolyzed collagen; and (2) adding 100 parts by weight of hydrolyzed collagen obtained in the step (1) into a closed reactor provided with a cooling reflux apparatus, respectively adding 10-50 parts by weight of organic solvent and 5-30 parts of 10-50% NaOH aqueous solution, stirring and dropwise adding 5-30 parts by weight of fatty acyl chloride at the temperature of 30-70 DEG C, reacting for 0.5-4 hours under the cooling reflux condition, switching off the cooling reflux device, and continuing reacting for 0.5-4 hours to obtain the protein-base surfactant product.

Description

technical field [0001] The invention relates to a method for firstly hydrolyzing tanning leftovers by enzymatic method and then using the hydrolyzate as a raw material to prepare a surfactant, which belongs to the field of protein-based surfactant preparation. Background technique [0002] Surfactants are a new class of chemicals that have emerged with the rapid development of the petroleum industry since the 1950s, and are important products of fine chemicals. After entering the 21st century, with the increasing scarcity of global petroleum resources and the continuous emergence of disadvantages such as low safety, poor biocompatibility, and non-degradable chemically synthesized surfactants, it is urgent to adopt green environmental protection technology and renewable resources to produce easily degradable, Non-toxic, mild and efficient new surfactants, and protein-based surfactants are one of the important development directions. Since protein is a component of animals an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/30C12P21/06C09K23/30
Inventor 廖学品迟原龙崔敏曹明蓉石碧
Owner SICHUAN UNIV