Polymerization method for light olefins

A low-carbon olefin, superposition reaction technology, applied in hydrocarbons, hydrocarbons, chemical instruments and methods, etc., can solve problems such as magnetic disappearance, and achieve the effects of improving mass transfer, reducing energy consumption, and improving production efficiency

Active Publication Date: 2012-05-09
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 using magnetic resin as a catalyst for chemical production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 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

[0053] 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

[0055] 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 was cooled, the material was discharged, washed repeatedly with distilled water, and dried naturally to obtain the magnetic core.

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PUM

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Abstract

The invention relates to a composite reaction method for low-carbon olefin. A raw material of the low-carbon olefin is fed into a magnetic stabilized bed reactor and subjected to contact reaction with magnetic strong acid resin, the reaction temperature is between 50 and 110 DEG C, the reaction pressure is 0.1 to 0.3MPa, the liquid volume airspeed is 0.5 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 low-carbon olefin to carry out composite 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 superposition reaction method of low-carbon olefins, in particular to a method for superposition reaction of low-carbon olefins catalyzed by a magnetic strong acid resin in a magnetically stable bed reactor. Background technique [0002] Accompanied by the rapid development of the automobile industry, the consumption of vehicle fuel is increasing day by day, and the resulting automobile exhaust pollution to the atmosphere has attracted widespread attention from all over the world. The specification requirements of gasoline are also constantly improving, and motor gasoline is developing in the direction of low sulfur, low olefins, low aromatics, and high octane number. Since both olefins and aromatics are important sources of gasoline octane, the octane loss caused by the reduction of these components needs to be compensated by adding high-octane components to the blended gasoline components. [0003] Olefin superposition ref...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C2/28C07C11/00B01J31/08C08F12/08C08F20/10C08F2/38C08J5/20C08K3/22
Inventor 程萌谢文华宗保宁刘强孟祥堃
Owner CHINA PETROLEUM & CHEM CORP
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