A kind of preparation method of composite desiccant with polyethylene oxide and organic quicklime

A polyethylene oxide, composite drying technology, applied in separation methods, chemical instruments and methods, other chemical processes, etc., can solve problems such as uncontrollability, intense reaction, fire, etc., and achieve high tensile strength and moderate reaction. , the effect of low cost

Active Publication Date: 2019-05-14
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

[0015] A kind of preparation method of polyethylene oxide and organic quicklime composite desiccant according to the present invention adopts the following steps:

[0016] 1) According to the number of parts by mass, take 100 parts of block quicklime, 5-13 parts of ethylene oxide, crush 100 parts of block quicklime, grind through a 100-240 mesh sieve, place in a vacuum planetary ball mill tank, and vacuum Vacuumize the planetary ball mill tank, fill it with nitrogen, add 5-13 parts of ethylene oxide, and grind it for 1-1.5 hours at a grinding rate of 1000-2000r / min in the vacuum planetary ball mill tank under the condition of 40-50°C. 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;

[0017] 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 organic quicklime composite desiccant.

[0018]...

Embodiment 1

[0019] Embodiment 1: A kind of preparation method with polyethylene oxide and organic quicklime composite desiccant, this preparation method adopts the following steps:

[0020] 1) According to the number of parts by mass, take 100 parts of block quicklime and 5 parts of ethylene oxide, crush 100 parts of block quicklime, grind through a 100-mesh sieve, put it in a vacuum planetary ball mill tank, and pump the vacuum planetary ball mill tank Vacuum, fill with nitrogen, add 5 parts of ethylene oxide, in the vacuum planetary ball mill tank under the condition of 40°C, grind for 1 hour at a grinding rate of 1000r / min, then reduce the grinding rate at a uniform speed until the grinding is completely stopped, and keep the vacuum Static reaction for 0.5h to obtain product A;

[0021] 2) Take the product A obtained in step 1), place it in an oven at 105° C., and dry it for 1 hour to obtain a 3 mm granular organic quicklime composite desiccant. Polyethylene oxide is polymerized on the...

Embodiment 2

[0022] Embodiment 2: A kind of preparation method with polyethylene oxide and organic quicklime composite desiccant, this preparation method adopts the following steps:

[0023] 1) According to the number of parts by mass, take 100 parts of block quicklime and 9 parts of ethylene oxide, crush 100 parts of block quicklime, grind through a 170 mesh sieve, place in a vacuum planetary ball mill tank, and pump the vacuum planetary ball mill tank Vacuum, fill with nitrogen, add 9 parts of ethylene oxide, in the vacuum planetary ball mill tank under the condition of 45 ℃, with a grinding rate of 1500r / min, grind for 1.3h, then reduce the grinding rate at a uniform speed until the grinding is completely stopped, keep Vacuum static reaction 0.8h, obtain product A;

[0024] 2) Take the product A obtained in step 1), place it in an oven at 107° C., and dry it for 1.5 hours to obtain a 4.5 mm granular organic quicklime composite desiccant. The surface of the organic quicklime is polymeriz...

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PUM

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Abstract

The invention discloses a preparation method of a poly(ethylene oxide) and organic quicklime composite drying agent. According to the preparation method, quicklime is introduced into a vacuum ball mill tank of a planetary ball mill, air in the vacuum ball mill tank is removed via pumping, nitrogen is introduced into the vacuum ball mill tank, ethylene oxide is added, grinding is carried out, and after grinding, an obtained product is taken out from the vacuum ball mill tank and is dried so as to obtain the poly(ethylene oxide) and organic quicklime composite drying agent. The poly(ethylene oxide) and organic quicklime composite drying agent is excellent in moisture absorption effect; reaction after water absorption is mild; safety is high; preparation process is simple; cost is low; no side product is generated; and the preparation method is friendly to the environment, and is suitable for large-scale production.

Description

technical field [0001] The invention relates to a preparation method of a composite desiccant made of polyethylene oxide and organic quicklime, which belongs 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30B01D53/26B01D53/28
CPCB01D53/261B01D53/28B01J20/041B01J20/262B01J2220/46B01J2220/4806B01J2220/4812
Inventor 彭志勤卢张鹏万军民王秉胡智文
Owner ZHEJIANG SCI-TECH UNIV
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