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Saturated alkane dehydrogenation catalyst and preparation method thereof

A technology for alkane dehydrogenation and catalysts, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc. Interaction, Pt particle aggregation and growth, etc., to avoid the loss of alkali metal, improve activity and stability, and simple preparation method

Active Publication Date: 2017-03-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The steam dechlorination process will cause the aggregation and growth of Pt particles, which will affect the interaction between Pt-Sn, thereby affecting the selectivity of the target product alkenes

Method used

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  • Saturated alkane dehydrogenation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh an appropriate amount of pseudohydroboehmite containing 14g of alumina, and disperse it in 100mL of distilled water with stirring. Take the prepared tin nitrate solution containing 1g of Sn and the magnesium nitrate solution containing 3g of magnesium oxide, mix them, add to the dispersion liquid, and heat to 70°C. Add 1M ammonium carbonate solution dropwise to the system until the pH value of the solution is 8. Stirring was stopped and aged at constant temperature for 12 hours. After solid-liquid separation, it was dried at 120°C for 4 hours and calcined at 800°C for 16 hours. The obtained solid is weighed and mixed with pseudoboehmite in a ratio of 1:1 to form it. Dry at 120°C for 4h and calcined at 600°C for 4h to prepare the carrier. Weigh an appropriate amount of chloroplatinic acid and dissolve it in deionized water, add it to the above carrier, age for 2 hours, dry at 80°C for 8 hours, bake at 600°C for 4 hours, and then dechlorinate in nitrogen containi...

Embodiment 2

[0020] Weigh an appropriate amount of pseudohydroboehmite containing 14g of alumina, and disperse it in 100mL of distilled water with stirring. Take the prepared tin nitrate solution containing 1.5g of Sn and the magnesium nitrate solution containing 4g of magnesium oxide, mix them, add to the dispersion liquid, and heat to 70°C. Add 1M ammonium carbonate solution dropwise to the system until the pH value of the solution is 9. Stirring was stopped and aged at constant temperature for 24 hours. After solid-liquid separation, it was dried at 100°C for 6h and calcined at 900°C for 8h. The obtained solid is weighed and mixed with pseudoboehmite in a ratio of 1:1 to form it. Dry at 120°C for 4h and calcined at 600°C for 4h to prepare the carrier. Weigh an appropriate amount of chloroplatinic acid and dissolve it in deionized water, add it to the above carrier, age for 2 hours, dry at 80°C for 8 hours, roast at 600°C for 4 hours, and then dechlorinate in nitrogen containing 20V% ...

Embodiment 3

[0022]Weigh an appropriate amount of pseudohydroboehmite containing 14g of alumina, and disperse it in 100mL of distilled water with stirring. Take the prepared tin nitrate solution containing 0.5g of Sn and the magnesium nitrate solution containing 5g of magnesium oxide, mix them, add to the dispersion liquid, and heat to 80°C. Add 1M ammonium carbonate solution dropwise to the system until the pH value of the solution is 8. Stirring was stopped and aged at constant temperature for 24 hours. After solid-liquid separation, it was dried at 100°C for 6h and calcined at 900°C for 8h. The obtained solid is weighed and mixed with pseudoboehmite in a ratio of 1:1 to form it. Dry at 120°C for 4h and calcined at 600°C for 4h to prepare the carrier. Weigh an appropriate amount of chloroplatinic acid and dissolve it in deionized water, add it to the above carrier, age for 2 hours, dry at 80°C for 8 hours, roast at 600°C for 4 hours, and then dechlorinate in nitrogen containing 20V% w...

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Abstract

The invention discloses an alkane dehydrogenation catalyst. The catalyst adopts MgAl2O4 doped by alumina and SiO2 and having a magnesium aluminate spinel structure as a carrier, an active metal component is generally selected from one or more of platinum, palladium, iridium, rhodium and osmium in the platinum family, and preferably Pt, and the catalyst comprises 0.2-0.6wt% of the active component, 1.0-3.0wt% of Sn, 30-60wt% of the MgAl2O4 structure component, and the balance of alumina. The catalyst has a good hydrothermal stability, and can inhibit the aggregation growth of Pt particles in the hydrothermal dechlorination process, so the activity and the stability of the catalyst are substantially improved.

Description

technical field [0001] The invention relates to a low-carbon alkane dehydrogenation catalyst and a preparation method thereof, in particular to a propane dehydrogenation propylene catalyst and a preparation method thereof. Background technique [0002] The development of shale gas in North America has led to a sharp decline in natural gas prices relative to crude oil prices, while the production of large condensate liquids (NGLs) in shale gas has also increased rapidly. Shale gas condensate is rich in low-carbon alkanes such as ethane, propane, and butane. Ethane can replace petroleum-based cracking raw materials to produce ethylene. Therefore, the main source of propylene is FCC, which cannot meet the rapidly growing demand for propylene. Dehydrogenation of low-carbon alkanes in natural gas (conventional natural gas, shale gas, coalbed methane, combustible ice, etc.) to produce low-carbon olefins is an effective way to solve this problem. Moreover, with the increasing scar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/62C07C5/333C07C11/06
CPCY02P20/52
Inventor 张海娟李江红王振宇乔凯
Owner CHINA PETROLEUM & CHEM CORP
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