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Diatomite-based filter paper as well as preparation method and application thereof

A technology of diatomite and filter paper, applied in filter paper, separation method, chemical instrument and method, etc., can solve the problems of difficult biodegradation, complicated production process, high cost of raw materials, and achieve low cost, simple operation and high separation efficiency. Effect

Active Publication Date: 2021-03-26
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the high raw material cost, complicated production process and difficult biodegradation of existing hydrophilic membranes, their large-scale application is limited. Therefore, the research on new oil-water separation materials is still an important topic in this field.

Method used

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  • Diatomite-based filter paper as well as preparation method and application thereof
  • Diatomite-based filter paper as well as preparation method and application thereof
  • Diatomite-based filter paper as well as preparation method and application thereof

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preparation example Construction

[0029] The invention provides a kind of preparation method of diatomite-based filter paper, comprising the following steps:

[0030] A) diatomite is mixed with an organic solvent, and then reacted with a silane coupling agent to obtain modified diatomite;

[0031] B) mixing the modified diatomite, the paper material and the aqueous solution of the crosslinking agent, stirring and reacting to obtain the modified pulp;

[0032] C) After the modified pulp is filtered by suction, it is dried to obtain a diatomite-based filter paper.

[0033] In the present invention, the diatomite and the organic solvent are firstly mixed. In some embodiments of the present invention, the organic solvent is selected from toluene or xylene.

[0034] In some embodiments of the present invention, the mass ratio of the diatomite to the organic solvent is 1:2-10. In some embodiments, the mass ratio of the diatomaceous earth to the organic solvent is 1:5.

[0035] In some embodiments of the present ...

Embodiment 1

[0064] Under the protection of nitrogen, 10g of diatomaceous earth and 50g of toluene were added to the reactor, the temperature was raised to 60°C, and then 5,6-epoxyhexyltriethoxysilane was added dropwise to the reactor, and the time of dropping was controlled After 30 min, after the dropwise addition, react at 60° C. for 8 h. After the reaction, filter and dry to obtain 9.3 g of modified diatomite particles.

[0065] The obtained modified diatomite particles were subjected to a contact angle test, and the specific test method was as follows: firstly, the modified diatomite was pressed into a tablet, and then 2 μL of water was dropped on the modified diatomite tablet, and the contact angle was measured by a contact angle tester. The contact angle test was carried out, and the test results were as follows: figure 1 shown. figure 1 It is the water contact angle test chart of the modified diatomite particles in Example 1 of the present invention. Tests show that the water co...

Embodiment 2

[0067] At room temperature, 0.5 g of the modified diatomite particles obtained in Example 1 and 1 g of recycled paper were added to 30 g of an aqueous solution of glutaraldehyde with a mass concentration of 10%, and stirred and reacted at 40° C. for 10 h to obtain uniform modified pulp. The reacted pulp was poured into a funnel to form a film directly through vacuum filtration (the vacuum degree of the vacuum filtration is 0.08 MPa), and dried to obtain a diatomite-based filter paper. The contact angle test results are as follows figure 2 shown. figure 2 It is the dichloromethane contact angle test chart of the diatomite-based filter paper in Example 2 of the present invention under water. The test results show that the diatomite-based filter paper has a dichloromethane contact angle of 153° under water, and has underwater super-oleophobic properties.

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Abstract

The invention relates to the technical field of functional materials, and in particular, relates to diatomite-based filter paper as well as a preparation method and application thereof. The preparation method of the diatomite-based filter paper comprises the following steps: A) mixing diatomite and an organic solvent, and then reacting with a silane coupling agent to obtain modified diatomite; B)mixing the modified diatomite, a paper material and an aqueous solution of a cross-linking agent, and carrying out a stirring reaction to obtain modified paper pulp; and C) carrying out suction filtration on the modified paper pulp, and drying to obtain the diatomite-based filter paper. It is researched and found that oil-water separation can be realized by passing an oil-water mixture or an oil-water emulsion through the diatomite-based filter paper provided by the invention, and the separation efficiency is relatively high. Moreover, the preparation method of the diatomite-based filter paperprovided by the invention is relatively low in cost and simple to operate, and the prepared diatomite-based filter paper has biodegradability and is convenient for large-scale production and application.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a diatomite-based filter paper, its preparation method and application. Background technique [0002] Oil-water mixtures or emulsions are widely found in petroleum, chemical and machinery industries, which are extremely harmful to the ecological environment and human health, making the demand for oily wastewater treatment increasing day by day. At present, there are many treatment methods for oily sewage, mainly including external demulsifier method, physical method (including gravity separation, centrifugation separation, filtration separation), and membrane separation method. The first two methods are relatively conventional and mature methods. Although they have a wide range of practical applications, they also have the problems of low separation efficiency and high cost. The latter is a new separation method that has emerged with the rise of membrane science in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/08D21J3/12B01D17/022
CPCD21H27/08D21J3/12B01D17/0202
Inventor 白云刚王丕新徐昆张文德
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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