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Drying agent

A desiccant, polyacrylamide technology, applied in other chemical processes, dispersed particle separation, chemical instruments and methods, etc., can solve problems such as damage to items, and achieve the effects of long effective time, low cost of raw materials, and high moisture absorption capacity

Active Publication Date: 2014-02-12
KUNSHAN WEISHENG DRIER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For occasions where it is inconvenient to replace the desiccant, spilled water can cause damage to items

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1 Container high moisture absorption desiccant

[0019] According to the application field, the adsorbent is anhydrous calcium chloride, the water-absorbent polymer is polyacrylamide with a polymerization measurement of 18 million, and the ion substitution degree is 40%.

[0020] According to the technical requirements, the moisture absorption capacity is greater than 280% under the conditions of 25°C and 90% relative humidity. Choose 2 parts of anhydrous calcium chloride and 1 part of polyacrylamide, mixed to prepare a high moisture absorption desiccant mixed adsorbent.

[0021] The moisture absorption performance comparison between the desiccant of this embodiment and the traditional high-hygroscopic desiccant (test conditions, 25° C., RH 90%, the sample is a bare sample) is shown in Table 1.

[0022] Table 1: Comparison of moisture absorption performance

[0023] Moisture absorption time (hr)

[0024] 12

[0025] The desiccant was left for one month, and no liqui...

Embodiment 2

[0027] According to the application field, the adsorbent is anhydrous calcium chloride, the water-absorbent polymer is polyacrylamide with a polymerization measurement of 18 million, and the ion substitution degree is 40%. 4 parts of anhydrous calcium chloride; 1 part of polyacrylamide, 0.1 part of vegetable starch (cured corn starch), mixed to prepare a high moisture absorption desiccant mixed adsorbent.

[0028] The moisture absorption performance comparison between the desiccant of this embodiment and the traditional high-hygroscopic desiccant (test conditions, 25° C., RH 90%, the sample is a bare sample) is shown in Table 2.

[0029] Table 2: Comparison of moisture absorption performance

[0030] Moisture absorption time (hr)

[0031] The desiccant was left for one month, and no liquid water seeped out. The traditional high-hygroscopic desiccant has water analysis.

Embodiment 3

[0033] The water-absorbent polymer is polyacrylamide with a polymerization measurement of 18 million and an ion substitution degree of 40%. 2 parts of anhydrous calcium chloride, 3 parts of calcium chloride dihydrate, 1 part of polyacrylamide, 0.3 parts of plant lake (cured potato starch), the four are mixed to prepare a high-hygroscopic desiccant mixed adsorbent.

[0034] The moisture absorption performance comparison between the desiccant of this embodiment and the traditional high-hygroscopic desiccant (test condition, 25°C, RH90%, the sample is a bare sample) is shown in Table 3.

[0035] Table 3: Comparison of moisture absorption performance

[0036] Moisture absorption time (hr)

[0037] The desiccant was left for one month, and no liquid water seeped out. The traditional high-hygroscopic desiccant has water analysis.

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PUM

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Abstract

The invention belongs to the field of gas drying, and provides a drying agent. The drying agent comprises 1-5 parts by weight of anhydrous calcium chloride, 0-8 parts by weight of calcium chloride dihydrate, 1-5 parts by weight of polyacrylamide and 0-1 part by weight of vegetable starch by weight. The drying agent provided by the invention adopts an organic macromolecule component, and is low in raw material cost; higher hygroscopicity can be obtained and can be up to over 400% through the structural characteristics of macromolecules; the drying agent is long in effective time; no liquid water oozes.

Description

Technical field [0001] The invention belongs to the field of gas drying, and specifically relates to a desiccant with high moisture absorption capacity using calcium chloride and polyacrylamide as desiccant materials. Background technique [0002] Calcium chloride is a white porous block, granular or honeycomb solid. Slightly bitter, odorless. The aqueous solution is colorless. Used as a gas desiccant, dehydrated in the industrial production of alcohols, esters, ethers and acrylic resins, or used as a calcium intensifier, curing agent, chelating agent, desiccant in the food industry, with adsorption activity, static dehumidification and peculiar smell Removal and other effects. It is also used in the field of packaging and transportation to keep items from moisture. [0003] In the prior art, the calcium chloride desiccant is a combination of anhydrous calcium chloride and mature vegetable starch (for example, patent CN102847417A) to prepare a desiccant product. After a period...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30B01D53/28B01D53/02
Inventor 沈飞
Owner KUNSHAN WEISHENG DRIER
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