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High-performance lignin extraction process

An extraction process and lignin technology, which is applied in the field of lignin, can solve the problems of difficult lignin extraction, achieve the effect of increasing the contact area and strengthening the enzymatic hydrolysis process

Inactive Publication Date: 2022-04-08
饶姣妹
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the prior art, the present invention provides a high-efficiency lignin extraction process, which solves the problem of difficult lignin extraction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] S1. Pour the raw material containing lignin into a container, add tetrabutylphosphorus hydroxide aqueous solution, put it in a constant temperature water bath and stir, add dimethylamine while stirring, take out the container after a period of time, and pour the sodium hydroxide solution into the flask , stirring with constant temperature magnetic stirring for 1h, and vacuum filtration to obtain the filtrate;

[0018] S2. Add hydrochloric acid to the filtrate container in step S1, adjust the pH of the solution to 6.8, add absolute ethanol and sodium carbonate, put it in an oven and react at 80°C for 24 hours, vacuum filter after the reaction is complete, and obtain the above Serum;

[0019] S3. Finally, hydrochloric acid was added to the supernatant, the pH of the solution was adjusted to 2, and the reaction was carried out at 80° C. for 24 hours. The sodium carbonate was fully reacted, and vacuum filtration was performed to obtain a solution containing lignin.

Embodiment 2

[0021] S1. Pour the raw material containing lignin into a container, add tetrabutylphosphorus hydroxide aqueous solution, put it in a constant temperature water bath and stir, add dimethylamine while stirring, take out the container after a period of time, and pour the sodium hydroxide solution into the flask , stirring with constant temperature magnetic stirring for 1h, and vacuum filtration to obtain the filtrate;

[0022] S2. Add hydrochloric acid to the filtrate container in step S1, adjust the pH of the solution to 6.8, add absolute ethanol and sodium bicarbonate, put it in an oven and react at 80° C. for 24 hours, vacuum filter after the reaction is completed, and obtain supernatant;

[0023] S3. Finally, hydrochloric acid was added to the supernatant, the pH of the solution was adjusted to 2, and the reaction was carried out at 80° C. for 24 hours. The sodium bicarbonate was fully reacted, and vacuum filtration was performed to obtain a solution containing lignin.

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Abstract

The invention discloses a high-efficiency lignin extraction process which comprises the following steps: S1, pouring a lignin-containing raw material into a container, adding an ionic solution, putting into a constant-temperature water bath kettle, stirring, adding an optimizer while stirring, taking out of the container after a period of time, pouring an alkaline solution into a flask, magnetically stirring at constant temperature for 1 hour, and carrying out vacuum suction filtration to obtain filtrate; s2, adding an acid into the filtrate container in the step S1, adjusting the pH value of the solution to 6.8, adding absolute ethyl alcohol and carbonate, putting into a drying oven, reacting at 80 DEG C for 24 hours, and performing vacuum suction filtration after the reaction is finished, so as to obtain supernate; and S3, finally, adding acid into the supernate, adjusting the pH value of the solution to 2, reacting at 80 DEG C for 24 hours, fully reacting carbonate, and carrying out vacuum suction filtration to obtain a solution containing lignin. According to the process disclosed by the invention, the ionic solution and the added optimizer are matched with the carbonate and carbon dioxide generated by acid reaction, so that the enzyme hydrolysis process is enhanced, and the process is a high-efficiency lignin extraction process.

Description

technical field [0001] The invention relates to the technical field of lignin, in particular to a high-efficiency lignin extraction process. Background technique [0002] Lignin is used to produce many valuable products such as polyurethanes, phenolic resins and biodispersants. However, due to the complex and stable chemical cross-links between the various components of lignocellulose, the extraction of this lignin has brought great difficulties. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the invention provides a high-efficiency lignin extraction process, which solves the problem of difficult lignin extraction. [0004] In order to achieve the above object, the present invention is achieved through the following technical solutions: a high-efficiency lignin extraction process, specifically comprising the following steps: [0005] S1. Pour the raw material containing lignin into the container, add the ionic solution, put it into the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08H7/00
Inventor 饶姣妹
Owner 饶姣妹
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