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A preparation method of polyethylene glycol and organic quicklime composite desiccant

A polyethylene glycol, composite drying technology, applied in separation methods, chemical instruments and methods, other chemical processes, etc., can solve the problems of uncontrollability, violent reaction, explosion, etc., and achieve high tensile strength, moderate reaction, good safety effect

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 glycol 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 lump quicklime, 5-13 parts of ethylene glycol, crush 100 parts of lump quicklime, grind through a 100-240 mesh sieve, put it in a vacuum planetary ball mill tank, and put the vacuum planetary Vacuumize the ball mill tank, fill it with nitrogen, add 5-13 parts of ethylene glycol, in the vacuum planetary ball mill tank under the condition of 40-50°C, grind at a grinding rate of 1000-2000r / min for 1-1.5h, and then grind at a constant speed Reduce the grinding rate 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....

Embodiment 1

[0019] Embodiment 1: A kind of preparation method with polyethylene glycol and organic unslaked lime 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 glycol, crush 100 parts of block quicklime, grind through a 100-mesh sieve, place it in a vacuum planetary ball mill jar, and evacuate the vacuum planetary ball mill jar , filled with nitrogen, added 5 parts of ethylene glycol, in the vacuum planetary ball mill tank under the condition of 40 ℃, with a grinding rate of 1000r / min, grinding reaction for 1h, then reduce the grinding rate at a uniform speed, until the grinding is completely stopped, keep vacuum static reaction 0.5h, product A was obtained;

[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. The surface of the organic ...

Embodiment 2

[0022] Embodiment 2: a kind of preparation method with polyethylene glycol and organic unslaked lime 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 glycol, crush 100 parts of block quicklime, grind through a 170-mesh sieve, place it in a vacuum planetary ball mill tank, and evacuate the vacuum planetary ball mill tank , filled with nitrogen, added 9 parts of ethylene glycol, in the vacuum planetary ball mill tank under the condition of 45 ℃, with a grinding rate of 1500r / min, the grinding reaction was 1.3h, and then the grinding rate was reduced at a constant speed until the grinding was completely stopped, and the vacuum was kept. After reacting for 0.8h, product A was obtained;

[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...

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PUM

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Abstract

The invention discloses a preparation method of a polyethylene glycol and organic quicklime composite drying agent. According to the preparation method, quicklime and ethanediol are 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, 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 polyethylene glycol and organic quicklime composite drying agent. The polyethylene glycol 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 using polyethylene glycol and organic quicklime, and 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 of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/26B01D53/28
CPCB01D53/28B01J20/22B01J20/265
Inventor 彭志勤卢张鹏万军民王秉胡智文
Owner ZHEJIANG SCI-TECH UNIV
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