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Biological enzyme preparation for waste paper deinking, preparation method and deinking process

A waste paper deinking and compound biological enzyme technology, applied in the direction of chemical paint/ink remover, coating, etc., can solve the problems of difficult structure regulation, poor binding enzyme ability, inactivation, etc.

Inactive Publication Date: 2021-10-01
青岛先锋化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Inorganic carrier materials have good mechanical strength, wider sources, and lower cost, but the disadvantages are that the structure is not easy to regulate, and the ability to bind enzymes is poor, resulting in easy desorption and inactivation of immobilized enzymes. Organic polymers are used for modification. can complement each other so that the excellent characteristics of the two can be brought into play,

Method used

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  • Biological enzyme preparation for waste paper deinking, preparation method and deinking process
  • Biological enzyme preparation for waste paper deinking, preparation method and deinking process
  • Biological enzyme preparation for waste paper deinking, preparation method and deinking process

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preparation example Construction

[0029] Preferably, the specific steps of the preparation method are as follows: add polyethyleneimine to the acidic solution of chitosan, and modify the surface of chitosan by heating under the condition of cutting off oxygen; add magnetic Fe 3 o 4 After incubating for a period of time to obtain the chitosan-modified magnetic nanoparticles; adding the magnetic nanoparticles to the buffer solution of the complex enzyme and incubating to obtain the complex biological enzyme preparation.

[0030]Further, the chitosan acidic solution is prepared in the following manner: 10% acetic acid solution is used to dissolve chitosan, and the ratio of chitosan to acetic acid solution is 3-10 g: 150-400 mL.

[0031] When the above-mentioned acidic solution of chitosan is configured, under the condition of constant stirring, a small amount of chitosan solid powder can be added to the acetic acid solution for several times to dissolve; chitosan can also be directly sprinkled on the surface of t...

Embodiment 1

[0048] In the present embodiment, a kind of compound biological enzyme that is used for waste paper deinking is provided, and described compound biological enzyme comprises carrier and compound enzyme, and described carrier is the magnetic Fe of chitosan modification 3 o 4 Nanoparticles, the composite enzyme is laccase and lipase, and the preparation method of the composite biological enzyme is as follows:

[0049] 1) Co-precipitation method to prepare magnetic Fe 3 o 4 Nanoparticles:

[0050] 2.1g FeCl 3 4H 2 O and 5.5 g FeCl 3 ·6H 2 O dissolved in 100mL deionized water, in N 2 Heat the water bath to 80°C under the atmosphere, slowly add concentrated ammonia water dropwise to the mixed solution until the solution is weakly alkaline, stir vigorously at a speed of 500rpm for 1h, after the reaction is completed, separate it by adding a magnet, and wash it with deionized water to the solution The pH is neutral, and finally vacuum dried to obtain magnetic Fe 3 o 4 Nanopa...

Embodiment 2

[0055] In the present embodiment, a kind of compound biological enzyme that is used for waste paper deinking is provided, and described compound biological enzyme comprises carrier and compound enzyme, and described carrier is the magnetic Fe of chitosan modification 3 o 4 Nanoparticles, the compound enzyme is pectinase and lipase, and the preparation method of the compound biological enzyme is as follows:

[0056] 1) Preparation of magnetic Fe by microwave hydrothermal method 3 o 4 Nanoparticles:

[0057] FeSO 4 ·H 2 O, Fe(NO 3 ) 3 ·H 2 O as raw material to prepare magnetic Fe 3 o 4 Nanoparticles, and use ethanol of oleic acid to modify the surface of the product, then use distilled water and absolute ethanol to wash, centrifuge and dry the product to obtain the magnetic Fe 3 o 4 Nanoparticles.

[0058] 2) Chitosan modified magnetic nanoparticles:

[0059] 5g chitosan was added in 200mL 10% acetic acid solution for 0.8h to make it fully swell, and 15mL of 10% pol...

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Abstract

The invention particularly relates to a biological enzyme preparation for waste paper deinking, a preparation method and a deinking process. The bio-enzyme technology is widely applied to the field of papermaking, and compared with chemical treatment, the bio-enzyme treatment waste paper deinking can effectively reduce wastewater discharge in production engineering. However, when the immobilized enzyme is applied to waste paper deinking, the defects of enzyme activity reduction, inconvenient recovery and the like still exist. The invention provides a composite bio-enzyme preparation for waste paper deinking, and the composite bio-enzyme preparation comprises a composite enzyme and a carrier, wherein the carrier is chitosan modified magnetic nanoparticles. In construction of the carrier, a carrier crosslinking process is optimized, damage to enzyme activity is reduced, a deinking treatment agent which is convenient to recycle and more stable is provided, and treated paper has good whiteness and mechanical performance and has a higher economic value.

Description

technical field [0001] The invention belongs to the technical field of waste paper deinking, and in particular relates to a biological enzyme preparation for waste paper deinking, a preparation method thereof and a deinking process using the composite biological enzyme preparation. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] The pulp and paper industry is a large traditional water user, and it is also an important source of water pollution in my country. Due to serious pollution, papermaking wastewater has been criticized. Recycling waste paper is currently an effective strategy to solve the shortage of raw materials, energy shortages and serious pollution in the pape...

Claims

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Application Information

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IPC IPC(8): C09D9/00C09D9/04
CPCC09D9/00C09D9/04
Inventor 李少涛吕金荣孙尚先
Owner 青岛先锋化学有限公司
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