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Method for preparing enzymatic hydrolysis (EH) lignin-dimer fatty acid derivative

A technology for enzymatically decomposing lignin and polydiacid, which is applied in the field of enzymatically decomposing lignin-polydiacid modified derivatives and new biomass materials, and can solve the problems of rarely being effectively used and destroying natural lignin active groups. Problems, to achieve good economic value, beneficial to environmental protection, high purity effect

Active Publication Date: 2010-09-08
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pulp and paper industry obtains a large amount of lignin by-products, but due to the harsh process of papermaking, the active groups of natural lignin are destroyed, and a large amount of lignin is still directly discharged into rivers as "black liquor" or burned after being concentrated. be used effectively

Method used

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  • Method for preparing enzymatic hydrolysis (EH) lignin-dimer fatty acid derivative
  • Method for preparing enzymatic hydrolysis (EH) lignin-dimer fatty acid derivative
  • Method for preparing enzymatic hydrolysis (EH) lignin-dimer fatty acid derivative

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Example 1: Preparation of lignin-polydiacid derivatives by enzymatically decomposing lignin and polydiacid

[0034] Add 10g of enzymatic lignin, 0.02g of potassium persulfate, 0.02g of copper chloride inhibitor and 0.03g of ZrO in the three-necked round bottom flask 2 / SO 4 2+ Type solid superacid catalyst, then add 45ml of dioxane solvent, stir until the lignin is dissolved, then open the dropping funnel containing 4.5g of polydiacid 12ml-dioxane solution, control the rate of addition, add 15min After completion, heat up to 55°C and protect with nitrogen gas. After the dropwise addition, continue to react for 4.0 hours, and the acidity will not change. The catalyst was recovered by suction filtration while the reaction liquid was cooled, and the grafted product was slowly added dropwise to 180ml of methanol, the reaction product precipitated out, centrifuged and left overnight, filtered by suction and washed with methanol, and then dried at 70°C to constant weight ,...

Embodiment 2

[0035] Example 2: Preparation of lignin-polydiacid derivatives by enzymatically decomposing lignin and polydiacid

[0036] Add 10g of enzymatic lignin, 0.02g of benzoyl peroxide (BPO), 0.02g of hydroquinone inhibitor and 0.04g of 732 type cation exchange resin catalyst into a three-neck round bottom flask, and then add 45ml of di Oxycycline solvent, stirred until the lignin was dissolved, then opened the dropping funnel containing 4.5g of polydiacid 10ml-dioxane solution, controlled the dropping speed, added 15min, heated to 55°C and protected by nitrogen , Continue to react for 4.5h after the dropwise addition, and the acidity does not change any more. The catalyst was recovered by suction filtration while the reaction liquid was cooled, and the grafted product was slowly added dropwise to 170ml of methanol, the reaction product precipitated out, centrifuged and left overnight, filtered by suction and washed with methanol, and then dried at 70°C to constant weight , the prec...

Embodiment 3

[0037] Example 3: Preparation of lignin-polydiacid derivatives by enzymatically decomposing lignin and polydiacid

[0038] Add 10g of enzymatic lignin, 0.02g of azobisisobutyronitrile (AIBN), 0.02g of p-benzoquinone polymerization inhibitor and 0.03g of 732 type cation exchange resin catalyst into a three-neck round bottom flask, and then add 50ml of di Oxycycline solvent, stirred until the lignin was dissolved, then opened the dropping funnel equipped with 4.5g of polydiacid 10ml-dioxane solution, controlled the dropping rate, added 15min, heated to 65°C and protected by nitrogen , Continue to react for 5.0h after the dropwise addition, and the acidity does not change any more. The catalyst was recovered by suction filtration while the reaction liquid was cooled, and the grafted product was slowly added dropwise to 170ml of methanol, the reaction product precipitated out, centrifuged and left overnight, filtered by suction and washed with methanol, and then dried at 70°C to c...

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Abstract

The invention provides a method for preparing an enzymatic hydrolysis (EH) lignin-dimer fatty acid derivative by adopting enzymatic hydrolysis (EH) lignin and dimer fatty acid. In the method, the enzymatic hydrolysis (EH) lignin and dimer fatty acid are prepared into the enzymatic hydrolysis (EH) lignin-dimer fatty acid derivative by radical induction and polycondensation in an organic solvent in the presence of an initiator, a catalyst and a polymerization inhibitor. The invention improves flexibility and low crystallinity of materials, has low cost and favorable economic value, and can be applied in high polymer material modification fields such as rubber, plastics, coating, adhesive and the like. The invention can utilize regenerative biomass materials as raw materials to prepare the enzymatic hydrolysis (EH) lignin-dimer fatty acid derivative which can serve as a high polymer modified additive, thus not only lowering cost, reducing petroleum chemical consumption, but also saving energy and reducing emission, and generating great social benefit; and the prepared enzymatic hydrolysis (EH) lignin-poly diacid derivative has simple processing technology, easy implementation and good effect.

Description

technical field [0001] The present invention belongs to the field of new material development, and more specifically relates to a method for preparing a new biomass material—enzymolysis of lignin-polydiacid modified derivatives. Background technique [0002] With the deepening of human understanding of environmental pollution and resource crisis, the renewable and degradable properties of natural polymers have been paid more and more attention. Recycling of waste and utilization of renewable resources is a major issue in contemporary economic and social development, and it is also a new requirement for contemporary science and technology. The reserve of lignin in nature is second only to cellulose, and it is regenerated at a rate of 50 billion tons every year. The pulp and paper industry obtains a large amount of lignin by-products, but due to the harsh process of papermaking, the active groups of natural lignin are destroyed, and a large amount of lignin is still directly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08H6/00C08G63/668C08G63/78C08H7/00
Inventor 程贤甦
Owner FUZHOU UNIV
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