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Process for Propane Dehydrogenation to Propylene

A propane dehydrogenation and propylene technology, applied in the field of propane dehydrogenation to propylene, can solve the problem of not providing stability data

Active Publication Date: 2022-04-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Catalyst K-Ce-Pt-Sn / γ-Al disclosed in Chinese patent (CN200910209534.4) 2 o 3 After 6 hours of reaction, the conversion rate of propane was 38%, the selectivity of propylene was 98%, and the amount of carbon deposition was less, the study did not provide stability data
[0004] Propane dehydrogenation catalysts have made great progress, but there is still room for improvement in catalyst activity
The present invention adopts M1-M2-Al-O as the carrier to load Pt-Sn catalyst to improve the performance of the catalyst, and has good application prospect, but there is no relevant report yet

Method used

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  • Process for Propane Dehydrogenation to Propylene
  • Process for Propane Dehydrogenation to Propylene
  • Process for Propane Dehydrogenation to Propylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 39.97g of beryllium chloride, 133.22g of chromium chloride, 24.52g of lanthanum chloride and 253.34g of soluble salt of aluminum chloride and dissolve them in 1L of deionized water, mix well, slowly drip ammonia water under continuous stirring, Adjust the pH value to 8.0, age the product for 2 hours, filter and wash with 4L of water to obtain a filter cake, dry the filter cake at 90°C for 16 hours, and roast it in a muffle furnace at 600°C for 20 hours to obtain Be 0.5 Cr 0.5 La 0.1 al 1.9 o xcarrier. Weigh 9.85g of the carrier and put it into a beaker, then weigh 0.295g of tin tetrachloride and dissolve it in 10mL of hydrochloric acid solution, add the above-mentioned carrier while stirring, mix well, soak at 30°C for 12 hours, and then dry at 90°C for 16 hours. Obtain catalyst precursor, denoted as I. Weigh 0.133 chloroplatinic acid and dissolve it in 10mL water, add it into I while stirring, mix evenly, soak at 30°C for 12 hours, dry at 90°C for 16 hours, ...

Embodiment 2

[0029] Weigh 128.2g of magnesium nitrate, 200.08g of chromium nitrate, 32.49g of lanthanum nitrate and 712.75g of soluble salt of aluminum nitrate, dissolve them in 1L of deionized water, mix well, and slowly drip ammonia water under continuous stirring to adjust the pH value 8.0, the product was aged for 2 hours, filtered and washed with 4L of water to obtain a filter cake, dried at 90°C for 16 hours, and then roasted in a muffle furnace at 600°C for 20 hours to obtain Mg 0.5 Cr 0.5 La 0.1 al 1.9 o x carrier. Weigh 9.85g of the carrier and put it into a beaker, then weigh 0.190g of stannous chloride and dissolve it in 10mL of hydrochloric acid solution, add the above-mentioned carrier under stirring, mix well, soak at 30°C for 12 hours, and then dry at 90°C for 16 hours. Obtain catalyst precursor, denoted as I. Weigh 0.133 chloroplatinic acid and dissolve it in 10mL water, add it into I while stirring, mix evenly, soak at 30°C for 12 hours, dry at 90°C for 16 hours, and ...

Embodiment 3

[0031] Weigh 88.09g of calcium acetate, 200.08g of chromium nitrate, 31.60g of lanthanum acetate and 307.96g of basic aluminum acetate soluble salt, dissolve them in 1L of deionized water, mix well, and slowly drip ammonia water under continuous stirring to adjust the pH The value is 8.0, the product is aged for 2 hours, filtered and washed with 4L of water to obtain a filter cake, dried at 90°C for 16 hours, and then roasted in a muffle furnace at 600°C for 20 hours to obtain Ca 0.5 Cr 0.5 La 0.1 al 1.9 o x carrier. Weigh 9.85g of the carrier and put it into a beaker, then weigh 0.190g of stannous chloride and dissolve it in 10mL of hydrochloric acid solution, add the above-mentioned carrier under stirring, mix well, soak at 30°C for 12 hours, and then dry at 90°C for 16 hours. Obtain catalyst precursor, denoted as I. Weigh 0.133 chloroplatinic acid and dissolve it in 10mL water, add it into I while stirring, mix evenly, soak at 30°C for 12 hours, dry at 90°C for 16 hour...

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Abstract

The invention relates to a method for producing propylene by dehydrogenating propane, which mainly solves the problem of low activity of dehydrogenation catalysts prepared in the prior art. The present invention adopts the method for producing propylene by propane dehydrogenation, the reaction raw material is propane, the reaction conditions are: the volume ratio of water vapor and propane is (10-1):1, the reaction temperature is 400°C-600°C, and the reaction pressure is 0 ~1MPa, propane mass space velocity is 3.0~8.0h ‑1 When the reaction raw material is contacted with the catalyst to obtain propylene; in parts by weight, the catalyst includes the following components: 0.1 to 5 parts of Pt or its oxide; 0.1 to 5 parts of Sn or its oxide; 90 to 99 parts of composite oxide M1-M2-Al-O carrier, M1 is selected from a mixture of IIA and VIB elements, and M2 is selected from at least one lanthanide element, which can better solve this problem and can be used in the industrial production of propane dehydrogenation to prepare propylene.

Description

technical field [0001] The invention relates to a method for producing propylene from propane dehydrogenation. Background technique [0002] Low-carbon olefins, such as propylene, are very important organic chemical raw materials. Together with isobutene and ethylene, they are considered to be the basis of modern petrochemical industry, and are used to produce polymers, gasoline, detergents and other chemical raw materials. The traditional method of preparing propylene is to use ethylene co-production and light oil (naphtha, light oil) cracking process, but oil reserves are limited, propylene is limited by the target product, and it is difficult to increase it on a large scale, so countries around the world are committed to developing new methods for preparing propylene route. Among them, the method of preparing corresponding propylene through direct dehydrogenation process using petrochemical by-products or propane in natural gas as raw material has received great attentio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C5/333B01J23/652C07C11/06
CPCC07C5/3332B01J23/002B01J23/6522C07C2523/652B01J2523/00B01J2523/21B01J2523/31B01J2523/3706B01J2523/43B01J2523/67B01J2523/828B01J2523/22B01J2523/23B01J2523/24B01J2523/25C07C11/06Y02P20/52
Inventor 姜冬宇缪长喜吴文海吴省
Owner CHINA PETROLEUM & CHEM CORP