Catalyst for alkane dehydrogenation and device

A technology of alkane dehydrogenation and catalyst, which is applied in the field of low-carbon alkane dehydrogenation catalyst and alkane catalytic dehydrogenation device, which can solve the problems of high investment and catalyst use cost, frequent catalyst regeneration, and expensive Pt, etc., and achieve long regeneration cycle , high selectivity and good stability

Active Publication Date: 2012-05-16
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Whether it is a Cr-based catalyst or a Pt-based catalyst, it will be deactivated by coking within a few hours of continuous feeding, so the catalyst must be frequently regenerated
Moreover, Pt is expensive, and the high investment and catalyst use costs limit the application of the dehydrogenation process using Pt catalysts. Only countries or regions with abundant isobutane resources and low prices can the economics of this process be reasonable.
In addition, the use of Pt catalysts must also deoxygenate the circula

Method used

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  • Catalyst for alkane dehydrogenation and device
  • Catalyst for alkane dehydrogenation and device
  • Catalyst for alkane dehydrogenation and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Add 352.9 g of deionized water to 88.23 g of pseudo-boehmite, stir well in a water bath at 80°C, and add hydrochloric acid to adjust the pH value to about 3. 20g tin oxide (SnO 2 ) and 15g titanium oxide (TiO 2 ) powder into the prepared gel, then add 50g of deionized water, mechanically stir evenly, dry at 120°C for 8h, then roast at 600°C for 10h, cool, crush and sieve. Weigh 8.52g of Ba(NO 3 ) 2 , dissolved in 20g deionized water. Ba(NO) was impregnated on the prepared catalyst 3 ) 2 solution, dried at 140°C for 9h, and then calcined at 600°C for 12h. The evaluation results of the catalyst showed that the conversion rate of isobutane was 35.81wt%, the yield of isobutene was 30.46wt%, and the selectivity of isobutene was 85.06wt%.

Embodiment 2

[0084] Add 352.9 g of deionized water to 88.23 g of pseudo-boehmite, stir well in a water bath at 80° C., add nitric acid to adjust the pH value to about 3. 20g tin oxide (SnO 2 ), 10g titanium oxide (TiO 2 ) and 5g gallium oxide (Ga 2 o 3 ) powder into the prepared gel, then add 50g of deionized water, mechanically stir evenly, dry at 120°C for 7h, then roast at 600°C for 10h, cool and crush and sieve. Weigh a certain mass of Ca(NO 3 ) 2 , calculated according to the mass of its oxide as 5g, dissolved in 20g of deionized water and stirred evenly. The prepared catalyst was impregnated with Ca(NO 3 ) 2 solution, dried at 140°C for 8h, and then calcined at 600°C for 12h. The catalyst evaluation results showed that the conversion rate of isobutane was 47.07wt%, the yield of isobutene was 36.27wt%, and the selectivity of isobutene was 77.06wt%.

Embodiment 3

[0086] Add 352.9 g of deionized water to 88.23 g of pseudoboehmite, stir well in a water bath at 80° C., and add nitric acid to adjust the pH to about 3.5. 20g tin oxide (SnO 2 ), 10g titanium oxide (TiO 2 ) and 5g of magnesium oxide (MgO) powder were added to the prepared gel, then 50g of deionized water was added, mechanically stirred evenly, dried at 120°C for 6h, then calcined at 600°C for 10h, cooled, crushed and sieved. Weigh a certain mass of LiNO 3 , calculated according to the mass of its oxide as 5g, dissolved in 20g of deionized water and stirred evenly. Impregnation of LiNO on the catalyst 3 solution, dried at 140°C for 10h, and then calcined at 600°C for 12h. The catalyst evaluation results showed that the conversion rate of isobutane was 41.49wt%, the yield of isobutene was 32.34wt%, and the selectivity of isobutene was 77.95wt%.

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Abstract

The invention provides a catalyst for alkane dehydrogenation as well as a continuous reaction regeneration device and method using the catalyst for catalytic dehydrogenation. The catalyst comprises four ingredients, the ingredient A is oxides of one kind of element or several kinds of elements from Ti, Nb, Ta, Mo, W, Re, In or Ga, the ingredient B is one kind or several kinds of materials in MgO, P2O5, ZrO2, Al2O3 or SiO2, the ingredient C is oxides of one kind of material or several kinds of materials from Zn, Cd and Sn, and the ingredient D is one kind of material or a mixture of several kinds of materials from alkali oxides or alkaline earth metal oxides. The catalyst does not contain noble metal such as Pt and the like, does not contain toxic ingredients such as Cr and the like and cannot pollute the environment. The activity of the catalyst is high, the selectivity of olefin generated by alkane dehydrogenation is high, the stability of the catalyst is good, the mechanical intensity is high, the continuous reaction regeneration device is used for alkane dehydrogenation, the reaction and the catalyst regeneration are continuously carried out, the efficiency is high, and the safety is high.

Description

technical field [0001] The invention relates to an alkane dehydrogenation catalyst, in particular to a low-carbon alkane dehydrogenation catalyst, a preparation method of the catalyst and a device for catalytic alkane dehydrogenation using the modified catalyst. Background technique [0002] Olefins and diolefins (ethylene, propylene, butene, isobutylene, isoprene and butadiene, etc.) in synthetic resins, plastics, high-octane gasoline blending components (methyl tert-butyl ether, methyl tert-amyl Ethers and alkylated oils) and other high value-added products are widely used. In addition to these olefins, steam cracking of hydrocarbons (such as steam cracking of ethane, steam cracking of naphtha), catalytic cracking of olefins (such as Superflex technology), catalytic cracking of heavy oil (such as TMP, DCC technology) and catalytic pyrolysis of heavy oil (such as CPP technology) and other processes, the catalytic dehydrogenation of alkanes is also an important technical ro...

Claims

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Application Information

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IPC IPC(8): B01J23/14B01J23/20B01J23/30B01J23/28B01J23/08B01J23/06B01J23/92C07C5/333C07C11/09
CPCY02P20/584
Inventor 李春义王国玮孙楠楠
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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