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Composite resin catalyst used for preparing alkylene dihydric alcohol

A technology of alkylene glycol and composite resin, which is applied in the direction of organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, hydrolysis preparation, etc., and can solve problems such as poor heat resistance and short service life of the catalyst problems, to achieve the effect of reducing energy consumption, reducing conversion rate, and reducing material consumption

Active Publication Date: 2009-02-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is that the catalyst used in the prior art has the problems of short service life and poor heat resistance under the condition of relatively high conversion rate and selectivity. Diol Composite Resin Catalyst

Method used

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  • Composite resin catalyst used for preparing alkylene dihydric alcohol
  • Composite resin catalyst used for preparing alkylene dihydric alcohol

Examples

Experimental program
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Effect test

preparation example Construction

[0039] Preparation method of composite resin

[0040] 【Example】

[0041] In a 250 ml three-neck bottle, add 120 ml of distilled water and 0.6 g of polyvinyl alcohol, start stirring and raise the temperature to completely dissolve the polyvinyl alcohol. Stop stirring, add the monomer mixture solution containing initiator (20.4 grams of styrene, 6.1 grams of divinylbenzene, 3.9 grams of carbon nanotubes, 1.4 grams of benzoyl peroxide) after cooling down slightly, start stirring, and heat up to 85 ° C. React for 5 hours. The temperature was raised to 95°C for about 2 hours. After the reaction, pour out the upper liquid, wash with 85°C hot water for several times, and then wash with cold water for several times, then filter, dry, and weigh to obtain composite beads. Functionalization of composite beads: Add 20.6 grams of composite beads A and 80 milliliters of chloromethyl ether into a 500-ml three-necked bottle, start stirring and heat up to 30°C, add 8 grams of zinc chloride ...

Embodiment 1～5

[0054] 15 milliliters of each of the above-mentioned catalysts A, B, C, D, and E (grain size 20-40 mesh) were packed in a stainless steel fixed-bed reactor with a diameter of 10 mm and a length of 350 mm respectively, and the raw material water and ethylene oxide Alkanes are fed with a metering pump at a molar ratio of 12:1. The pressure of the reaction system is 1.2 MPa, the reaction temperature is 90°C, and the liquid space velocity is 3 hours -1 , The product was qualitatively and quantitatively analyzed by HP5890 gas chromatography, and the results are listed in Table 1.

Embodiment 6

[0058] 15 milliliters of the catalyst C (particle size 20-40 mesh) is packed in a stainless steel fixed-bed reactor with a diameter of 10 mm and a length of 350 mm, and feed water and ethylene oxide with a metering pump at a molar ratio of 22:1. . The pressure of the reaction system is 1.2 MPa, the reaction temperature is 90°C, and the liquid space velocity is 6 hours -1 , The product was qualitatively and quantitatively analyzed by HP5890 gas chromatography, and the results are listed in Table 1.

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Abstract

A composite resin catalyst for preparing alkylenediol is prepared from monomer, copolymer monomer, nano-material, trigger and assistant through preparing composite resin, and ion exchanging with the compound containing such ions as OH, Cl, HSO4, HCO3, or HCOO. Its advantages are high conversion rate, selectivity and high-temp resistance, and long service life.

Description

technical field [0001] The invention relates to a composite resin catalyst for preparing alkylene glycols. Background technique [0002] Ethylene glycol and propylene glycol are important aliphatic diols, among which ethylene glycol is the most widely used, mainly for the production of polyester resins, including fibers, films and engineering plastics. It can also be directly used as coolant and antifreeze, and it is also an indispensable substance in the production of alkyd resins, plasticizers, paints, adhesives, surfactants, explosives and capacitor electrolytes. [0003] Among the ethylene glycol compounds, diethylene glycol, triethylene glycol or higher polyethylene glycol have a narrower range of application than ethylene glycol. Therefore, in order to improve the selectivity of converting ethylene oxide into ethylene glycol, an excessive amount of water, that is, 20 to 25 times the molar amount of ethylene oxide, is often used in the above-mentioned hydration reactio...

Claims

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Application Information

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IPC IPC(8): C07C31/20C07C29/10B01J31/06
Inventor 周斌张惠明李应成杨为民
Owner CHINA PETROLEUM & CHEM CORP