Etherification reaction method of isomeric olefine

A technology for isomerization of olefins and etherification, applied in chemical instruments and methods, ether preparation, organic chemistry, etc., can solve problems such as magnetic disappearance, achieve the effects of improving mass transfer, reducing energy consumption, and increasing production efficiency

Active Publication Date: 2009-05-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is not easy to endow macroporous strongly acidic resins with magnetism and use them in magnetically stable beds, mainly because the harsh reaction conditions often lead to the disappearance of magnetism during the sulfonation of magnetic resins.
At present, magnetic resin materials are mainly used in metal enrichment, sewage treatment, biochemistry, medical medicine and other fields. So far, there is no report on the use of magnetic resin materials as catalysts for chemical production.

Method used

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  • Etherification reaction method of isomeric olefine
  • Etherification reaction method of isomeric olefine
  • Etherification reaction method of isomeric olefine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Mix and dissolve 26.5ml of styrene and 0.24g of benzoyl peroxide, put it in a 75°C water bath, stir for 15-25min, and pour the solution into a three-necked flask when the solution has a certain viscosity. Add 8g of iron powder and 0.1g of tetrabutoxytitanium into the three-necked flask, and stir mechanically until completely uniform. Add 80ml of 1wt% gelatin aqueous solution, raise the temperature to 80°C with stirring, and keep for 2h; raise the temperature to 85°C, keep for 2h; then raise the temperature to 90°C, keep for 6h, and the reaction is terminated. The reaction system was cooled and discharged, washed repeatedly with distilled water, and dried naturally to obtain magnetic cores.

Embodiment 2

[0055] Mix and dissolve 17.5ml of styrene, 9.7ml of divinylbenzene, and 0.21g of benzoyl peroxide, put in a water bath at 80°C, stir for 15-25min, and pour the solution into a three-necked flask when the solution has a certain viscosity. Add 8g of iron powder and 0.1g of tetrabutoxytitanium into the three-necked flask, and stir mechanically until completely uniform. Add 80ml of 2.5wt% polyvinyl alcohol aqueous solution, raise the temperature to 82°C with stirring, keep for 2h; raise the temperature to 86°C, keep for 2h; then raise the temperature to 90°C, keep for 6h, the reaction is terminated. After the reaction system is cooled, the material is discharged, washed repeatedly with distilled water, and dried naturally to obtain the magnetic core.

Embodiment 3

[0057] Mix and dissolve 17.5ml of styrene, 9.7ml of divinylbenzene, and 0.25g of azobisisobutyronitrile, put in a 74°C water bath, stir for 15-25min, and pour the solution into a three-necked flask when the solution has a certain viscosity. Add 8g of iron powder and 0.1g of tetrabutoxytitanium into the three-necked flask, and stir mechanically until completely uniform. Add 70ml of 1wt% gelatin aqueous solution, raise the temperature to 80°C with stirring, and keep for 2h; raise the temperature to 86°C, keep for 2h; then raise the temperature to 91°C, keep for 6h, and the reaction is terminated. After the reaction system is cooled, the material is discharged, washed repeatedly with distilled water, and dried naturally to obtain the magnetic core.

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Abstract

The invention relates to an etherification reaction method for isomeric olefine. Alcohol and a raw material of the isomeric olefine are fed into a magnetic stabilized bed reactor and subjected to contact reaction with magnetic strong acid resin, the molar ratio of the alcohol to the isomeric olefine is between 0.2-4:1, the reaction temperature is between 35 and 95 DEG C, the reaction pressure is 0.1 to 4MPa, the liquid volume airspeed is 1 to 100 h<-1>, and the magnetic field intensity of the magnetic stabilized bed reactor is 10 to 1,500 oersteds. The method uses the magnetic strong acid resin to catalyze the isomeric olefine to carry out etherification reaction in the magnetic stabilized bed reactor, improves the effects of mass transfer and heat transfer of a reaction system greatly, and reduces energy consumption. In actual operation, the method can load and unload a catalyst at any time and carry out ex-situ regeneration without stopping running of the device.

Description

technical field [0001] The invention relates to a method for etherification reaction of isomeric olefins. More specifically, the present invention relates to a method for catalyzing the etherification of isomeric olefins in a magnetically stabilized bed reactor with a strong magnetic acid resin. Background technique [0002] Higher ethers such as methyl tert-butyl ether (MTBE) and methyl tert-amyl ether (TAME) have higher octane number and lower vapor pressure than corresponding olefins and are completely miscible with gasoline components. They are used in The blending of gasoline components can significantly reduce the emission of CO and unburned hydrocarbons, which meets the requirements of environmental protection and can better protect the atmosphere. Although the MTBE leakage incident has caused 26 states in the United States to ban the use of MTBE as a gasoline additive, there is no definite evidence that MTBE is harmful to human health. Currently, Asia and Europe st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C41/06C07C43/04B01J31/08
Inventor 程萌谢文华宗保宁刘强孟祥堃
Owner CHINA PETROLEUM & CHEM CORP
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