Drying agent and preparation method thereof

A desiccant and drying technology, which is applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve the problems of poor moisture absorption rate of desiccants, and achieve the effects of increased moisture absorption rate, improved network structure, and large specific surface area.

Inactive Publication Date: 2018-12-11
郦璋
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a desiccant and its preparation method in view of the poor moisture absorption rate of the current desiccant

Method used

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  • Drying agent and preparation method thereof

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preparation example Construction

[0027] A preparation method of desiccant, comprising the steps of:

[0028] Take polyvinyl alcohol and add deionized water according to the mass ratio of 1~3:100~150, stir and mix for 20~30min to obtain the soaking liquid, take the water-absorbing active substance according to the mass ratio of 3~7:4~8, add deionized water and mix to obtain Dry the base material, take the dry base material and add the soaking solution according to the mass ratio of 2~5:7~10, let it stand for 18~24h, filter, take the filter residue b to dry, and obtain the desiccant.

[0029] Water-absorbing actives:

[0030] (1) Take guar gum 1:10 and add sodium hydroxide solution with a concentration of 0.06mol / L, stir and mix at 55°C for 40 minutes, then add ammonium persulfate with 3% guar gum mass, and keep warm at 55°C for 10 minutes to obtain stir the mixture;

[0031] (2) In terms of parts by mass, take 25 parts of the stirring mixture, 5 parts of acrylic acid, 6 parts of styrene, and 15 parts of sepi...

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Abstract

The invention discloses a drying agent and a preparation method thereof, and belongs to the technical field of chemical materials. The preparation method comprises the following steps: introducing styrene to serve as a hydrophobic comonomer on the basis of graft copolymerization of guar gum and acrylic acid in order to prepare a water-absorbing active matter, and then adding sepiolite to improve the swelling performance, increase network chain gap, facilitate the entrance of water molecules, improve the swelling rate and improve the drying and moisture-absorbing rate; activating silica gel served as a raw material through nitric acid and sodium hydroxide to remove impurities in the silica gel, and adding magnesium chloride and lithium chloride for compounding to obtain a moisture-proof agent, wherein the absorbed moisture can be locked inside the drying agent according to the characteristic that the pores of macro-porous silica gel are mainly a built-in structure, so that damping is prevented, and the water absorbing efficiency is lowered; adding polyvinyl alcohol as a modifier into a drying agent substrate, wherein polyvinyl alcohol has a certain moisture absorbing capability, sothat the drying agent is prevented from being liquified and decomposed after absorbing water and swelling, and can keep original shape. By adopting the drying agent, the problem of low moisture rate of an existing drying agent is solved.

Description

technical field [0001] The invention relates to the field of chemical materials, in particular to a desiccant and a preparation method thereof. Background technique [0002] A desiccant is a dehydrating agent that absorbs moisture from the atmosphere. It physically absorbs water molecules in its own structure or chemically absorbs water molecules and changes its chemical structure to become another substance. It is suitable for preventing moisture in instruments, meters, electrical equipment, medicines, food, textiles and other various packaging items. During transportation, goods are often affected by moisture and deteriorate due to high temperature, and electronic products are also prone to metal oxidation, resulting in poor performance. The use of desiccant is to avoid the occurrence of poor product quality caused by excess moisture. At present, there are many types of desiccants on the market, but most of them are shoddy, with low moisture absorption rate and poor use ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/28
CPCB01D53/28B01D2257/80
Inventor 郦璋路芸卢星
Owner 郦璋
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