Phenolic hydroxymethylated and carboxymethylated lignin and its preparation method
A technology of carboxymethylated lignin and phenolated hydroxymethyl, which is applied in the field of phenolized hydroxymethylated and carboxymethylated lignin and its preparation, can solve the problems that are not suitable for the use of chelated micro-fertilizers, and achieve Good water solubility and metal ion adsorption capacity, enhancing effect, effect of increasing active sites
Inactive Publication Date: 2019-04-09
NORTHWEST A & F UNIV
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Problems solved by technology
Yet the product majority that above-mentioned method obtains is insoluble in water, so the product that above-mentioned method obtains is still not suitable for using as chelated micro-fertilizer
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[0032] In order to facilitate those skilled in the art to more clearly understand the technical solutions of the application of the present invention, the application of the present invention will be further described below in conjunction with preferred embodiments. It should be understood that the preferred embodiments are not intended to limit the application of the present invention.
[0033] The principle of the application of the present invention is to fully expose the active sites of lignin through phenolization and hydroxymethylation treatment, so that the subsequent carboxymethylation treatment can be fully carried out, so that lignin can obtain better water solubility and metal ions. Adsorption.
[0034] The sulfuric acid, phenol, formaldehyde, sodium hydroxide, chloroacetic acid, isopropanol, and zinc chloride used in the following examples are all analytically pure, and the water used throughout the experiment is deionized water.
[0035] Constant temperature magnetic sti...
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Abstract
The invention discloses a phenolated hydroxymethylated carboxymethylated lignin and a preparation method thereof. The preparation method comprises the following steps: (1) preparation of phenolated lignin: carrying out phenolation on lignin by using phenols and acids to obtain the phenolated lignin; (2) preparation of phenolated hydroxymethylated lignin: carrying out hydroxymethylation on the phenolated lignin by using an alkali solution and aldehydes to obtain the hydroxymethylated lignin; and (3) carrying out carboxymethylation on the phenolated hydroxymethylated lignin to obtain the phenolated hydroxymethylated carboxymethylated lignin. The phenolated hydroxymethylated carboxymethylated lignin prepared by the method has high water solubility and high metal ion adsorption capacity, and is suitable to be used as a chelated micro fertilizer.
Description
Technical field [0001] The invention relates to the field of lignin processing, in particular to a phenolic hydroxymethylated and carboxymethylated lignin and a preparation method thereof. Background technique [0002] Lignin is rich in resources. It is generally used as a water reducer, binder and reinforcing agent. It contains a variety of functional groups, such as phenolic hydroxyl, methoxy, ether bond and carbonyl, etc. It is ideal for chelating micro-fertilizers Raw materials, however, chelated micro-fertilizers have higher requirements for water solubility and metal ion adsorption performance. The water solubility of lignin is very poor and only has weak metal ion adsorption. [0003] At present, the research on the adsorption of metal ions of lignin is basically based on chemical modification, such as by introducing functional groups such as amino and sulfonic acid groups into lignin; synthetic porous and rich in lignin as a matrix A method of functional group materials; s...
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IPC IPC(8): C08H7/00
CPCC07G1/00C08H6/00
Inventor 耿增超曹胜磊王月玲李鑫王强张彤彤周凤
Owner NORTHWEST A & F UNIV