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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0015] Example 1

[0016] (1) Preparation of steam-exploded corn stalk lignin: put 100 g of corn stalk into a steam-exploded tank for 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 filtration with 8 layers of gauze. The filtrate was precipitated with 3M hydrochloric acid, and centrifuged and washed 3 times to obtain steam-exploded corn stalk lignin.

[0017] (1) Preparation of steam-exploded corn stalk graft copolymer / cyclohexane emulsion: respectively add the steam-exploded acid-separated lignin and sodium lignosulfonate and 0.1mol / L NaOH solution into the three-necked flask (solid-to-liquid ratio 1: 50), the alkali breaks the ether bond of lignin to form more phenolic hydroxyl groups, so that the lignin can be activated. Then add a quantitative proportion of acrylamide monomer (40g / L), furth...

Example Embodiment

[0020] Example 2

[0021] (1) Preparation of steam-exploded wheat straw lignin: put 100 g of wheat straw into a steam-exploded tank for 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 filtration with 8 layers of gauze. The filtrate was precipitated with 3M hydrochloric acid, and centrifuged and washed 3 times to obtain steam-exploded wheat straw lignin.

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

Example Embodiment

[0025] Example 3

[0026] (1) Preparation of steam-exploded corn stalk lignin: put 100 g of corn stalk into a steam-exploded tank for 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 filtration with 8 layers of gauze. The filtrate was precipitated with 3M hydrochloric acid, and centrifuged and washed 3 times to obtain steam-exploded corn stalk lignin.

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

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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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