Propane dehydrogenation to propylene catalyst and preparation and applications thereof

A propane dehydrogenation and catalyst technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc. Cumbersome and other problems, to achieve the effect of easy large-scale production, low cost of raw materials, and simple methods

Inactive Publication Date: 2011-04-20
卓润生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

GB2177317A patent discloses the preparation of Cr / Al fluidized bed catalyst by impregnation method, but the method provided by this patent is cumbersome and costly, the selectivity is not high and the catalyst cannot be continuously produced

Method used

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  • Propane dehydrogenation to propylene catalyst and preparation and applications thereof
  • Propane dehydrogenation to propylene catalyst and preparation and applications thereof
  • Propane dehydrogenation to propylene catalyst and preparation and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 66 grams of pseudo-boehmite to 250 ml of water, stir for 2 hours to form a paste, add 17.08 grams of chromium nitrate and stir for 1 hour, then add 1.74 grams of lanthanum nitrate and stir for one hour, adjust the pH value to 3 with concentrated hydrochloric acid, and continue stirring for 2 hours After aging for 2 hours, dry at 120°C for 10 hours. Rapidly raise the temperature to 550° C. under a nitrogen atmosphere and maintain it for 5 hours, and the linear velocity of nitrogen is 100 cm / min. Then switch nitrogen to air, continue to heat up to 700°C and keep it for 1 hour, then cool down naturally. The specific surface area of ​​the catalytic catalyst screened at 40-80 mesh is 146m 2 / g, apparent bulk density 1.0.

Embodiment 2

[0027] Add 66 grams of pseudo-boehmite to 250 ml of water, stir for 2 hours to form a paste, add 8.08 grams of chromium nitrate and stir for 1 hour, then add 1.74 grams of lanthanum nitrate and stir for one hour, adjust the pH value to 3 with concentrated hydrochloric acid, and continue stirring for 2 hours After aging for 2 hours, dry at 120°C for 10 hours. Rapidly raise the temperature to 550° C. under a nitrogen atmosphere and maintain it for 5 hours, and the linear velocity of nitrogen is 100 cm / min. Then switch nitrogen to air, continue to heat up to 700°C and keep it for 1 hour, then cool down naturally. The specific surface area of ​​the catalytic catalyst screened at 40-80 mesh is 144m 2 / g, apparent bulk density 1.0.

Embodiment 3

[0029] Add 66 grams of pseudo-boehmite with 250ml of water, stir for 2 hours to form a paste, add 17.08 grams of chromium nitrate and stir for 1 hour, then add 1.74 grams of lanthanum nitrate and 0.1 grams of potassium nitrate and stir for one hour, adjust the pH value to 3. Continue to stir for 2 hours, age for 2 hours, and dry at 120°C for 10 hours. Rapidly raise the temperature to 550° C. under a nitrogen atmosphere and maintain it for 5 hours, and the linear velocity of nitrogen is 100 cm / min. Then switch nitrogen to air, continue to heat up to 700°C and keep it for 1 hour, then cool down naturally. The specific surface area of ​​the catalytic catalyst screened at 40-80 mesh is 144m 2 / g, apparent bulk density 1.0.

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Abstract

The invention relates to a propane dehydrogenation to propylene catalyst and preparation and applications thereof. The propane dehydrogenation to propylene catalyst is characterized by being a composition prepared from Gamma-Al2O3, a kind or many kinds of chromium oxides, a kind or many kinds of rare earth oxides and a kind or many kinds of alkali metal oxides, wherein the Gamma-Al2O3 accounts for 30-95%, the chromium oxides account for 1-50%, the rare earth oxides account for 0-30%, and the alkali metal oxides account for 0-10%. The preparation process comprises the following steps of: adding active components, such as chromium, rare earth, alkali metal and the like into aluminum oxide grout, regulating the pH value of 1-5 to form gelatum with concentrated nitric acid, and spraying and drying to form microballoons; then roasting for 0-5 hours at 250-750 DEG C in a nitrogen atmosphere; and roasting for 0.1-20 hours at 250-1000 DEG C in an air atmosphere. The obtained catalyst is in a fluid bed reactor, and reaction conditions comprise 400-700 DEG C of temperature, 0.01-3MPa of absolute pressure and 10-10000 h-1 of volume hourly space velocity.

Description

technical field [0001] The invention relates to a preparation method of a catalyst used in the reaction of propane dehydrogenation to propylene, and its application in the reaction of propane dehydrogenation to propylene. Background technique [0002] Propylene is an important organic chemical raw material. Since the 1990s, the growth rate of propylene demand has exceeded that of ethylene. According to the latest survey report of the American Chemicals Marketing Corporation (CMAI), the global propylene supply will increase from 56.7 million t / a in 2003 to 80.3 million t / a in 2010, with an average annual growth rate of 5%. Among them, the demand for propylene in the Asian market, especially the Chinese market, is growing the fastest. The existing propylene production equipment can no longer meet the growing demand for propylene in petrochemical production, and the price of propylene is gradually rising. At present, the main sources of propylene are: co-production of ethylene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/26B01J23/10B01J23/04B01J21/04B01J37/08C07C11/06C07C5/333
CPCY02P20/52
Inventor 卓润生计宝峰
Owner 卓润生
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