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Deoxygenating drying agent for precise instrument and preparation method of deoxygenating drying agent

A technology for precision instruments and desiccants, used in the field of deoxidizing desiccants for precision instruments and their preparation, can solve the problems of heat release, expansion, non-bentonite desiccant water retention, and unsatisfactory stability, etc. In large-scale promotion and application, to avoid the effect of mildew

Inactive Publication Date: 2015-03-04
DONGCHEN LEADER TESTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The water retention and stability of many non-bentonite desiccants are not very ideal, and they are prone to heat release and expansion after absorbing water, especially not meeting the high requirements for desiccants in the medical care, biological reagents, and food industries, so they are not suitable as desiccants Desiccants for precision instruments, so it is necessary to develop some more hygienic, efficient, delicate, environmentally friendly and stable desiccants

Method used

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  • Deoxygenating drying agent for precise instrument and preparation method of deoxygenating drying agent

Examples

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Embodiment 1

[0019] A deoxidizing desiccant for precision instruments, comprising in parts by weight: 3 parts of bentonite, 2 parts of attapulgite, 1 part of calcium chloride, 2 parts of macroporous silica gel, 1 part of magnesium chloride, 1 part of aluminum oxide, and 2 parts of dimethyl ester, 1 part of diatomaceous earth, 2 parts of cornstarch, and 0.5 part of deionized water.

[0020] The alumina is activated alumina, and the cornstarch is dry cornstarch.

[0021] The preparation method of the deoxidizing desiccant for the above-mentioned precision instrument comprises the following steps:

[0022] Step 1: Add cornstarch to 2 / 3 parts by weight of deionized water, stir and disperse, heat up to 70°C, keep warm for 2 hours, cool to room temperature, add calcium chloride and attapulgite, and mix well to obtain mixture I;

[0023] Step 2, adding bentonite and alumina to dimethyl maleate, stirring and dispersing, calcining at 400°C for 1 hour, and cooling to room temperature to obtain mixt...

Embodiment 2

[0027] A deoxidizing desiccant for precision instruments, comprising in parts by weight: 5 parts of bentonite, 4 parts of attapulgite, 2 parts of calcium chloride, 3 parts of macroporous silica gel, 2 parts of magnesium chloride, 3 parts of aluminum oxide, 4 parts of dimethyl ester, 3 parts of diatomaceous earth, 4 parts of cornstarch, and 1.4 parts of deionized water.

[0028] The alumina is activated alumina, and the cornstarch is dry cornstarch.

[0029] The preparation method of the deoxidizing desiccant for the above-mentioned precision instrument comprises the following steps:

[0030] Step 1: Add cornstarch to 2 / 3 parts by weight of deionized water, stir and disperse, heat up to 85°C, keep warm for 1 hour, cool to room temperature, add calcium chloride and attapulgite, and mix well to obtain mixture I;

[0031] Step 2, adding bentonite and alumina to dimethyl maleate, stirring and dispersing, calcining at 500°C for 0.5h, and cooling to room temperature to obtain mixtur...

Embodiment 3

[0035] A deoxidizing desiccant for precision instruments, comprising in parts by weight: 6 parts of bentonite, 7 parts of attapulgite, 3 parts of calcium chloride, 4 parts of macroporous silica gel, 4 parts of magnesium chloride, 4 parts of aluminum oxide, and 5 parts of dimethyl ester, 6 parts of diatomaceous earth, 5 parts of cornstarch, and 1.9 parts of deionized water.

[0036] The alumina is activated alumina, and the cornstarch is dry cornstarch.

[0037] The preparation method of the deoxidizing desiccant for the above-mentioned precision instrument comprises the following steps:

[0038] Step 1: Add cornstarch to 2 / 3 parts by weight of deionized water, stir and disperse, heat up to 70°C, keep warm for 2 hours, cool to room temperature, add calcium chloride and attapulgite, and mix well to obtain mixture I;

[0039] Step 2, adding bentonite and alumina to dimethyl maleate, stirring and dispersing, calcining at 500°C for 0.5h, and cooling to room temperature to obtain m...

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Abstract

The invention provides a deoxygenating drying agent for a precise instrument and a preparation method of the deoxygenating drying agent. The deoxygenating drying agent comprises bentonite, attapulgite, calcium chloride, macroporous silica gel, magnesium chloride, aluminum oxide, dimethyl maleate, diatomite, corn starch and deionized water. The preparation method comprises the following steps: firstly, adding the corn starch in 2 / 3 part by weight of deionized water, mixing for dispersing, adding the calcium chloride and the attapulgite to obtain a mixture I; then adding the bentonite and the aluminum oxide in the dimethyl maleate, and mixing for dispersing to obtain a mixture II; then adding magnesium oxide and diatomite into the left deionized water, mixing for dispersing, adding the macroporous silica gel to obtain a mixture III; and finally, mixing the mixture I, the mixture II and the mixture III, drying and cooling under a vacuum condition to obtain the deoxygenating drying agent. The deoxygenating drying agent can be used for keeping the instrument dry for a long time, preventing a part with a weak oxidation-resisting capability of the instrument from being oxidized, and can also be used for adsorbing mildews and preventing the interior and exterior of the instrument from mildewing.

Description

technical field [0001] The invention belongs to the technical field of deoxidizing desiccants, and in particular relates to a deoxidizing desiccant for precision instruments and a preparation method thereof. Background technique [0002] Desiccant is also called adsorbent, which is used in moisture-proof and mildew-proof, and plays a drying role. According to the adsorption method and reaction product, it can be divided into physical adsorption desiccant and chemical adsorption desiccant. Physical adsorption desiccants include silica gel, alumina gel, molecular sieve, activated carbon, bone charcoal, charcoal, mineral desiccant, or activated clay, etc. Its drying principle is to physically adsorb water molecules in its own structure. [0003] At present, the most common ones in China are porous silica gel desiccant. Silica gel desiccant is a kind of highly active adsorption material. The main component is silicon dioxide. It is usually reacted with sodium silicate and sulfur...

Claims

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Application Information

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IPC IPC(8): B01D53/28B01J20/24B01J20/30
Inventor 熊开胜张海防谢建庭
Owner DONGCHEN LEADER TESTING
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