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A preparation method of polyacrylic acid and organic quicklime composite desiccant

A technology of polyacrylic acid and compound drying, which is applied in the direction of separation methods, chemical instruments and methods, and other chemical processes, can solve the problems of violent reaction, uncontrollability, explosion, etc., and achieve high tensile strength, moderate reaction, and safety Good results

Inactive Publication Date: 2019-03-26
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when calcium oxide reacts, it will exothermic sharply, and its reaction is intense and uncontrollable, which often causes explosions and fires during storage.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0016] A kind of preparation method with polyacrylic acid and organic quicklime composite desiccant of the present invention, adopts following steps:

[0017] 1) According to the number of parts by mass, take 100 parts of lump quicklime, 5-13 parts of acrylic acid and isopropanol mixed solution, crush 100 parts of lump quicklime, grind through a 100-240 mesh sieve, and place it in a vacuum planetary ball mill tank , Vacuum the vacuum planetary ball mill tank, fill it with nitrogen, add 5-13 parts of acrylic acid and isopropanol mixed solution, and grind in the vacuum planetary ball mill tank under the condition of 40-50°C at a grinding rate of 1000-2000r / min React for 1-1.5h, then reduce the grinding rate at a uniform speed until the grinding is completely stopped, and keep the vacuum static reaction for 0.5-1h to obtain product A;

[0018] 2) Take the product A obtained in step 1), place it in an oven at 105-110° C., and dry it for 1-2 hours to obtain a 3-6 mm granular organi...

Embodiment 1

[0021] Embodiment 1: A kind of preparation method with polyacrylic acid and organic quicklime composite desiccant, this preparation method adopts the following steps:

[0022] 1) According to the number of parts by mass, take 100 parts of block quicklime, 5 parts of acrylic acid and isopropanol mixed solution, the mass ratio of the described acrylic acid and isopropanol is 1:1, crush 100 parts of block quicklime, grind Pass through a 100-mesh sieve, place it in a vacuum planetary ball mill jar, evacuate the vacuum planetary ball mill jar, fill it with nitrogen, add 5 parts of acrylic acid and isopropanol mixed solution, put it in a vacuum planetary ball mill jar under the condition of 40°C, and heat it at 1000r / min grinding rate, grinding reaction 1h, then reduce the grinding rate at a uniform speed, until the grinding is completely stopped, keep the vacuum static reaction for 0.5h, and obtain product A;

[0023] 2) Take the product A obtained in step 1), place it in an oven ...

Embodiment 2

[0024] Embodiment 2: A kind of preparation method with polyacrylic acid and organic quicklime composite desiccant, this preparation method adopts the following steps:

[0025] 1) According to the number of parts by mass, take 100 parts of block quicklime, 9 parts of acrylic acid and isopropanol mixed solution, the mass ratio of the described acrylic acid and isopropanol is 1:1, crush 100 parts of block quicklime, grind Pass through a 170-mesh sieve, place it in a vacuum planetary ball mill jar, evacuate the vacuum planetary ball mill jar, fill it with nitrogen, add 9 parts of acrylic acid and isopropanol mixed solution, put it in a vacuum planetary ball mill jar under the condition of 45°C, and heat it at 1500r / min grinding rate, grinding reaction 1.3h, then reduce the grinding rate at a uniform speed, until the grinding is completely stopped, keep the vacuum static reaction for 0.8h, and obtain product A;

[0026] 2) Take the product A obtained in step 1), place it in an ove...

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PUM

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Abstract

The invention discloses a preparing method for a polyacrylic acid and organic quick lime composite desiccant. Quick lime and crylic acid are added into a vacuum ball-milling tank of a planet ball mill, air in the vacuum ball-milling tank is pumped away, nitrogen is inflated in for ball milling, an obtained product is taken out to be dried after milling is finished, and the polyacrylic acid and organic quick lime composite desiccant is prepared. The prepared polyacrylic acid and organic quick lime composite desiccant is good in moisture absorption effect, an reaction is alleviated after water absorption, the safety is good, the process is simple, the cost is low, no by-products are produced, environmental protection and energy saving are achieved, and the preparing method is suitable for mass production.

Description

technical field [0001] The invention relates to a preparation method of a composite desiccant made of polyacrylic acid and organic quicklime, belonging to the field of desiccant preparation. Background technique [0002] Quicklime is a common desiccant used to remove water vapor by chemical absorption. It is also used in iron and steel, pesticides, medicines, desiccants, tanning and alcohol dehydration. It is especially suitable for puffed food, shiitake mushrooms, fungus and other local products, as well as products in instrumentation, medicine, clothing, electronic telecommunications, leather, textiles and other industries. Usually, the material containing calcium carbonate is heated to 500-600°C to decompose it into calcium oxide and carbon dioxide. The appearance is white, amorphous, and widely used in desiccants. Quicklime generally contains overfired lime and underfired lime. The structure of overfired lime is dense, and the surface is often covered with a layer of mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30B01D53/26B01D53/02
CPCB01D53/02B01D53/261B01D2257/80B01J20/041B01J20/261B01J2220/46B01J2220/4806B01J2220/4812
Inventor 彭志勤卢张鹏万军民王秉胡智文
Owner ZHEJIANG SCI-TECH UNIV
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