Catalyst used for dehydrogenation preparation of monoolefine by saturated alkane

A technology for alkane dehydrogenation and catalysts, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, hydrocarbons, etc., can solve the problems of high investment and operating costs, and achieve high alkane single pass Conversion rate, high olefin selectivity, and good stability

Inactive Publication Date: 2016-02-03
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nevertheless, high investment and operating costs are still unavoidable with the use of Pt-based catalysts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 338.03 g of deionized water to 84.51 g of pseudoboehmite, stir well in a water bath at 65° C., add hydrochloric acid to form a gel, and adjust the pH value to about 3-4. Weigh 144.45g of Mg(NO 3 ) 2 ·6H 2 O was added to the prepared gel, then 50g of deionized water was added, mechanically stirred evenly, dried at 120°C for 6 hours, then roasted at 700°C for 4 hours, crushed and sieved after cooling, and 80-180 mesh particles were used as the carrier spare. 72.15g of Fe(NO 3 ) 3 9H 2 O, 40.93g of Zn(NO 3 ) 2 ·6H 2 O was dissolved in 80g deionized water and stirred evenly, the prepared carrier was impregnated with the mixed solution, dried at 80°C for 6h, and then calcined at 600°C for 2h. Weigh 2.74g of NaNO 3 Prepared as an aqueous solution, impregnated on the above catalyst, then dried at 120°C for 6h, and finally calcined at 600°C for 5h.

Embodiment 2

[0021] Add 470.59g deionized water to 117.65g pseudo-boehmite, stir well in a water bath at 70°C, add hydrochloric acid to form a gel, adjust the pH value to about 3-4, stir mechanically, dry at 100°C for 8h, and then Calcined at 700°C for 2 hours, crushed and sieved after cooling, and took 80-180 mesh particles as the carrier for later use. 49.39g of Co(NO 3 ) 2 ·6H 2 O, 36.12g of Cu(NO 3 ) 2 ·3H 2 O was dissolved in 80g deionized water and stirred evenly, the prepared carrier was impregnated with the mixed solution, dried at 120°C for 6h, and then calcined at 600°C for 4h. Weigh 1.07gKNO 3 It is formulated as an aqueous solution, impregnated on the above catalyst, then dried at 140°C for 6 hours, and finally calcined at 400°C for 2 hours.

Embodiment 3

[0023] 59.46g of Ni(NO 3 ) 2 ·6H 2 O, 45.80 g of SnCl 2 2H 2 O was dissolved in 100g of absolute ethanol, after stirring evenly, weighed 75g of SiO 2 Add it to the aforementioned solution, stir and evaporate to dryness in a water bath at 80°C, then dry at 120°C for 5 hours, and bake at 600°C for 2 hours. Weigh 0.21gKNO 3 It is formulated as an aqueous solution, impregnated on the above catalyst, then dried at 100°C for 8 hours, and finally calcined at 700°C for 4 hours.

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PUM

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Abstract

The invention relates to a catalyst used for petrochemical industry, and concretely relates to the catalyst used for dehydrogenation preparation of monoolefine by saturated alkane. The catalyst comprises metal active components, a carrier, a first auxiliary agent and a second auxiliary agent, wherein the metal active components can be one or a combination from Fe, Co or Ni; the carrier can be one or a mixed oxide or a composite oxide from Al2O3, SiO2, ZrO2, TiO2 and MgO; the first auxiliary agent is a structural auxiliary agent, which is one or the combination from Zn, Cu, Sn, In or Cd; and the second auxiliary agent is one or a mixture of an alkali metal oxide or an alkaline earth oxide. The catalyst active components are non-precious metal elements which have no unfavorable influence on environment, selectivity of a target product alkene is high, simultaneously, carbon deposit is greatly reduced, and catalyst stability is good.

Description

technical field [0001] The invention relates to a catalyst for petrochemical industry, in particular to a catalyst for preparing monoolefin by dehydrogenating saturated alkane. Background technique [0002] Low-carbon olefins such as propylene are important petrochemical basic raw materials. As an effective way to rationally utilize low-value saturated alkanes to produce high-value-added corresponding olefins, alkane dehydrogenation technology has attracted extensive attention from researchers in recent years. [0003] The technology of catalytic dehydrogenation of alkanes to olefins has been applied industrially several decades ago. There are two kinds of catalysts used: supported noble metal Pt catalyst and Cr 2 o 3 catalyst. The use of Pt catalysts has high investment and operating costs; while Cr 2 o 3 The Cr produced by the catalyst during its preparation and use 6+ It is carcinogenic and will cause adverse effects on the human body and the environment. Therefore,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80B01J23/78B01J23/835B01J23/825B01J23/755C07C5/333C07C11/09C07C11/06
CPCY02P20/52
Inventor 王国玮李春义
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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