Emulsion preparation method based on steam explosion lignin

A lignin and steam explosion technology, which is applied in the field of emulsion preparation based on steam explosion lignin, can solve the problems of difficult separation and poor stability of emulsifiers, and achieve the effect of broadening the utilization channels

Inactive Publication Date: 2020-05-19
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It makes up for the shortcomings and deficiencies of traditional emulsions such as toxicity, poor stability, and difficult separation of emulsifiers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Preparation of lignin from steam-exploded corn stalks: put 100 g of corn stalks into a steam explosion tank at 1.5 Mpa for 5 minutes, release the pressure quickly, and obtain steam-exploded wheat straw. The steam-exploded wheat straw was mixed with 1% NaOH at a ratio of 1:10 and maintained at 121 °C for 1 h, and the filtrate was obtained by filtering with 8 layers of gauze. The filtrate was precipitated with 3M hydrochloric acid, centrifuged and washed 3 times, and the steam-exploded corn stalk lignin was obtained.

[0017] (1) Preparation of steam-exploded corn stalk graft copolymer / cyclohexane emulsion: respectively add steam-exploded acid analysis of lignin and sodium lignosulfonate and 0.1mol / L NaOH solution into a three-necked flask (solid-to-liquid ratio 1: 50), the alkali breaks the ether bond of lignin to form more phenolic hydroxyl groups, thereby activating lignin. Then add a quantitative ratio of acrylamide monomer (40g / L), further stir under the protect...

Embodiment 2

[0021] (1) Preparation of steam-exploded wheat straw lignin: 100 g of wheat straw was put into a steam-exploded tank at 1.5 Mpa for 5 minutes, and the pressure was quickly released to obtain steam-exploded wheat straw. The steam-exploded wheat straw was mixed with 1% NaOH at a ratio of 1:10 and maintained at 121 °C for 1 h, and the filtrate was obtained by filtering with 8 layers of gauze. The filtrate was precipitated with 3M hydrochloric acid, centrifuged and washed three times to obtain steam-exploded wheat straw lignin.

[0022] (2) Preparation of steam-exploded wheat straw lignin graft copolymer / cyclohexane emulsion: respectively add steam-exploded acid analysis lignin and sodium lignosulfonate and 0.1mol / L NaOH solution into a three-neck flask (solid-liquid ratio 1:50), the alkali breaks the ether bond of lignin to form more phenolic hydroxyl groups, thereby activating lignin. Then add a quantitative ratio of acrylamide monomer (40g / L), further stir under nitrogen prote...

Embodiment 3

[0026] (1) Preparation of lignin from steam-exploded corn stalks: put 100 g of corn stalks into a steam explosion tank at 1.5 Mpa for 5 minutes, release the pressure quickly, and obtain steam-exploded wheat straw. The steam-exploded wheat straw was mixed with 1% NaOH at a ratio of 1:10 and maintained at 121 °C for 1 h, and the filtrate was obtained by filtering with 8 layers of gauze. The filtrate was precipitated with 3M hydrochloric acid, centrifuged and washed 3 times, and the steam-exploded corn stalk lignin was obtained.

[0027] (2) Preparation of steam-exploded corn stalk lignin graft copolymer / chloroform emulsion: add steam-exploded acid-analyzed lignin and sodium lignosulfonate and 0.1mol / L NaOH solution into a three-neck flask (solid-liquid ratio 1:50), the alkali breaks the ether bond of lignin to form more phenolic hydroxyl groups, thereby activating lignin. Then add a quantitative ratio of acrylamide monomer (40g / L), further stir under nitrogen protection to homo...

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Abstract

Lignin is one of important components of lignocellulose, is an aromatic compound resource with the highest content in nature, and is mostly used for combustion due to the problems of low purity, highdispersity and the like, and the utilization mode wastes resources and causes environmental pollution to a certain extent, so that the development of a new lignin extraction process and the widening of the application range have important significance on the utilization of biomass resources. The invention discloses an emulsion preparation method based on steam explosion of lignin, wherein steam explosion treatment is taken as a core, acid precipitation is performed after dissolution with a dilute alkali liquid, the obtained steam explosion lignin and acrylamide are subjected to graft copolymerization to prepare a steam explosion lignin-polyacrylamide graft copolymer, the graft copolymer is mixed with cyclohexane and other oil phases to prepare an emulsion with uniform particles, and afterthe solvent is volatilized, a porous medium with uniform pores can be obtained. The preparation of the emulsion of the steam explosion lignin mainly has the two advantages that (1) steam is used as amedium treatment raw material, and dilute alkali liquor is adopted for extraction, so that the emulsion is economical and environment-friendly, and (2) the graft copolymer is prepared and applied to the preparation of the emulsion, so that the utilization way of the lignin is widened.

Description

technical field [0001] The invention relates to a method for preparing an emulsion based on steam-exploded lignin, which belongs to the field of biochemical industry. Background technique [0002] Energy crisis, environmental pollution and other issues drive global research on biorefining of lignocellulosic raw materials. At present, the single utilization of components in lignocellulosic refining makes it uneconomical in industrial production. Lignin is the second highest polymer in lignocellulose after cellulose. The production of 79 billion liters of second-generation fuels will produce 62 million tons of lignin, the development of a lignin-based product chain will greatly promote the overall economics of the utilization of lignocellulosic biomass resources. [0003] At present, there are two main ways to obtain lignin in the lignocellulosic refining system: (i) the lignocellulosic biomass is selectively split through pretreatment means, and the lignin is extracted befor...

Claims

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Application Information

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IPC IPC(8): C08J3/09C08F289/00C08F220/56C08H7/00C08L51/00
CPCC08F289/00C08H6/00C08J3/092C08J3/093C08J2351/00C08F220/56
Inventor 王岚刘阳陈洪章
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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