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A preparation method of organosilicon-modified lignin-based strong oil-absorbing material

A lignin-based, oil-absorbing material technology, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve the problem of poor surface activity of modified lignin amines, inability to directly use oil-absorbing materials, and oil absorption rate Unsatisfactory and other problems, to achieve the effect of uncomplicated treatment methods, good oil absorption effect, and good oil absorption rate

Active Publication Date: 2021-10-29
南京悦优生物科技有限公司
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Problems solved by technology

Liu Zuguang et al. (Chinese Journal of Papermaking, 2005, 20(2):75-79.) synthesized diethylenetriamine / formaldehyde-modified lignin amine by conventional heating reaction, and found that it can be used as a co-emulsifier to assist asphalt emulsification , but due to the poor surface activity of modified lignin amine, it cannot be directly used in oil-absorbing materials
The lignin-based microporous molecular sieve composite oil-absorbing material invented by Gu Xiaoli et al. (CN104448340A) can be used to solve the problem of low primary oil absorption by virtue of the advantages of regular molecular sieve channels and controllable pore size distribution. However, it is only limited to good oil absorption rate for small molecule oils (such as: chloroform), but the oil absorption rate for long chain hydrocarbon oils such as diesel oil is not ideal.

Method used

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  • A preparation method of organosilicon-modified lignin-based strong oil-absorbing material
  • A preparation method of organosilicon-modified lignin-based strong oil-absorbing material
  • A preparation method of organosilicon-modified lignin-based strong oil-absorbing material

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Experimental program
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Embodiment 1

[0031] Preparation of hydroxymethylated lignin: Take a 250mL three-necked flask, dissolve 20g lignin (about 0.1mol in terms of C9 units) in 50mL NaOH solution (concentration 1mol / L), stir well, and slowly drop in 37wt% lignin Formaldehyde solution 8mL (about 0.1mol), stir vigorously, heat up to 50°C, keep warm for 3 hours, pour the reaction solution into 80°C hot distilled water, drop 1mol / L hydrochloric acid solution under stirring state to methylolate Fully analyze lignin, let stand for 3 hours, filter, wash with 0.1mol / L dilute hydrochloric acid first, then wash with distilled water until the pH value is about 7.0, dry at 60°C, grind into fine powder, and then vacuum dry at 80°C The hydroxymethylated lignin was obtained (mass yield 84.2%).

[0032] The obtained hydroxymethylated lignin and the raw material lignin were tested by FT-IR, and the test instrument was a Nicolet Fourier Transform Infrared Spectrometer, and the test method was the KBr tablet method.

[0033] Such ...

Embodiment 2

[0037] The hydrolyzate of hydroxymethylated lignin and 3-aminopropyltriethoxysilane was prepared by the same method as in Example 1.

[0038]Add 1g of hydroxymethylated lignin to 10g of 3-aminopropyltriethoxysilane hydrolyzate, heat to 60°C, stir vigorously, and the reaction time is 24h. After the product was cooled to room temperature, it was filtered, washed with 95 wt% ethanol, washed with water, and dried at 120° C. for 12 hours to obtain silicone-modified lignin-based oil-absorbing material C2 (mass yield 90.4%).

Embodiment 3

[0040] The hydrolyzate of hydroxymethylated lignin and 3-aminopropyltriethoxysilane was prepared by the same method as in Example 1.

[0041] Add 1g of hydroxymethylated lignin to 20g of 3-aminopropyltriethoxysilane hydrolyzate, heat to 60°C, stir vigorously, and the reaction time is 24h. After the product was cooled to room temperature, it was filtered, washed with 95 wt% ethanol, washed with water, and dried at 120° C. for 12 hours to obtain silicone-modified lignin-based oil-absorbing material C3 (mass yield 90.7%).

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Abstract

The invention discloses a method for preparing an organosilicon-modified lignin-based strong oil-absorbing material, which belongs to the technical field of oil-absorbing materials. The method is to carry out hydroxymethylation of lignin to prepare hydroxymethylated lignin, and then polymerize the hydroxymethylated lignin with organosiloxane hydrolyzate to prepare organosilicon-modified lignin-based strong oil-absorbing oil Material. The method has the advantages of simple process, mild reaction conditions, high product yield, simple treatment method, low energy consumption, and the prepared organosilicon-modified lignin-based strong oil-absorbing material not only has good oil absorption rate, but also has biodegradability and is environmentally friendly. Friendly, it can solve the problem that conventional commercial oil-absorbing materials cannot be biodegraded, and can effectively deal with the problems of oil pollution on the sea surface and oil recovery in waste liquid.

Description

technical field [0001] The invention belongs to the technical field of oil-absorbing materials, and in particular relates to a method for preparing an organosilicon-modified lignin-based strong oil-absorbing material. Background technique [0002] Lignin is a multi-ring structure, three-dimensional network complex polymer organic matter, and its three-dimensional spatial distribution structure is mainly composed of three different phenylpropane unit structures, namely guaiacyl (G-type unit), syringyl (S-type unit) and p-hydroxyphenyl (H-type unit), and then these three different structural units are connected by ether bonds, carbon-carbon bonds, and carbon-oxygen bonds. The structural formula of lignin is: [0003] [0004] In nature, the reserve of lignin is second only to cellulose, and it is regenerated at a rate of tens of billions of tons every year. The pulp and paper industry separates about 150 million tons of cellulose from plants every year, and at the same ti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/32
CPCB01J20/262C02F1/285C02F1/488C02F2101/32
Inventor 董煜国顾晓利卢心予郭浩全欧阳嘉罗振扬何明王飞
Owner 南京悦优生物科技有限公司
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