Preparation method of rare earth element modified and aldehyde removed resin and application of rare earth element modified and aldehyde removed resin in ethylene glycol refining

A rare earth element and de-formaldehyde resin technology, applied in chemical instruments and methods, cation exchange, ion exchange, etc., can solve the problem of reduction of aldehydes that cannot be ethylene glycol, and achieve long service life and stable physical and chemical properties. Effect

Active Publication Date: 2015-02-18
JIANGSU SUQING WATER TREATMENT ENG GROUP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in actual production, neither of the above two methods can reduce the content of aldehydes in ethylene glycol to the required content of the product, especially in the ethylene glycol system where trace amounts of aldehydes exist.

Method used

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  • Preparation method of rare earth element modified and aldehyde removed resin and application of rare earth element modified and aldehyde removed resin in ethylene glycol refining

Examples

Experimental program
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Effect test

Embodiment 1

[0024] by La 3+ It is used as a catalyst after being immobilized on a catalytic resin through a chemical bond, and is used for the reaction of aldehyde and ethylene glycol to form ethylene glycol diacetal.

[0025] Weigh 100g of styrene and 9g of divinylbenzene into the polymerization kettle, turn on the agitator of the polymerization kettle, and when the temperature rises to 75°C, add 0.35g of benzoyl peroxide, stir at the same time to dissolve and mix evenly to make oil phase mixture; add the oil phase mixture to 0.5g polyvinyl alcohol and 250g water mixture at 75°C, continue heating to control the temperature of the polymerization tank at 85°C, and the reaction time is 8 hours; then raise the temperature to 95°C at 5°C / h, and the reaction time After 4 hours, after the reaction, wash the obtained polymer with water, dry it with hot air at 80°C and sieve the polymer to obtain a qualified polymer;

[0026] Take 100 g of the cross-linked polystyrene copolymer prepared above an...

Embodiment 2

[0029] Difference with embodiment 1 is that what modified rare earth adopts is 40ml, 2mol / L Sc (NO 3 ) 3 solution, the finally obtained dealdehyde resin has a specific surface area of ​​86m 2 / g, the bulk density of the resin packing layer in the fixed bed is 560kg / m 3 .

Embodiment 3

[0031] The difference from Example 1 is that the modified rare earth adopts 20ml, 2mol / L Sc(NO 3 ) 3 and 20ml, 2mol / L La(NO 3 ) 3 Mixture of solutions. The finally obtained dealdehyde resin has a specific surface area of ​​76m 2 / g, the bulk density of the resin packing layer in the fixed bed is 525kg / m 3 .

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Abstract

The invention relates to a preparation method of rare earth element modified and aldehyde removed resin and an application of the rare earth element modified and aldehyde removed resin in ethylene glycol refining. According to the preparation method, styrene is taken as a monomer, divinylbenzene is taken as a crosslinking agent, benzoyl peroxide is taken as an initiator, polyvinyl alcohol is taken as a suspending agent, water is taken as a reaction medium, and the components react in a suspension polymerization manner at the temperature of 85-95 DEG C; a polymer obtained after reaction is dissolved in dichloroethane for swelling, sulfuric acid is added for a sulfonation reaction, and cation exchange resin is obtained; and a nitric acid solution of the rare earth element is added into the cation exchange resin, and the rare earth element is chemically bonded to the resin to obtain the spherical modified and aldehyde removed resin. A fixed bed reactor is filled with the aldehyde removed resin, ethylene glycol is refined at the temperature of 60-70 DEG C, the density of a resin packing layer heap is 400-600 kg / m<3>, the reaction pressure is 0.4 MPa, under the catalytic action of the modified and aldehyde removed resin, impurity aldehyde and ethylene glycol have a condensation polymerization reaction and produce a product that does not influence an ethylene glycol product, and obtained ethylene glycol has high purity.

Description

technical field [0001] The invention relates to an ion exchange resin in the field of chemistry, in particular to a rare earth element modified formaldehyde removal resin, a preparation method thereof and the application of the modified formaldehyde removal resin in refining ethylene glycol. Background technique [0002] As a bulk chemical product and basic chemical raw material, ethylene glycol (EG) has broad market prospects for its development and utilization. It can be used to produce unsaturated polyester resin, polyester fiber, paint, antifreeze, ink lubricant, explosives, etc. In addition, the production of some specialty solvents such as glycol ethers also requires ethylene glycol. [0003] At present, the synthesis of large-scale ethylene glycol is still mainly based on the direct hydration of ethylene oxide. Although this production process is relatively mature and stable, it still has many shortcomings. For example, ethylene oxide will undergo isomerization to ge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/42C08F8/36C08F8/24C08F212/08C08F212/36C08F2/20B01J39/18B01J39/19
Inventor 张玉格王章忠穆立文杭祖圣钱平程晓辉
Owner JIANGSU SUQING WATER TREATMENT ENG GROUP
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