A kind of environment-friendly fluidized bed alkane dehydrogenation catalyst and preparation method thereof

A kind of alkane dehydrogenation and catalyst technology, which is applied in the field of fluidized bed alkane dehydrogenation catalysts, can solve the problems of uncoordinated conversion rate and selectivity of dehydrogenation catalysts, low conversion rate and selectivity of catalysts, difficulty in realizing industrialization, etc. Low cost, high olefin selectivity, selectivity-enhancing effect

Active Publication Date: 2021-12-17
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] CN111036260A, CN109939688A disclose a kind of iron-based propane dehydrogenation catalyst respectively, but catalyst conversion rate and selectivity are all low, it is difficult to realize industrialization
CN109382090A discloses a molybdenum vanadium double metal oxide catalyst, and the activity is very good, but the toxicity of vanadium oxide is relatively high, and it has strong carcinogenicity
However, dehydrogenation catalysts based on single or composite metal oxides have the problem of uncoordinated conversion and selectivity, and there is still room for optimization and improvement.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 40g of macroporous pseudo-boehmite into water and stir evenly, add an appropriate amount of formic acid, adjust the pH value to about 4-5, form a gel at 60°C, spray dry, and roast at 800°C for 4 hours to obtain oxide powder with an average particle size of 18μm. Aluminum microspheres.

[0033] Add 80g of small-pore pseudo-boehmite into water and stir evenly, add an appropriate amount of nitric acid to form a colloid at 60-80°C, add 1.2g of GeO 2 Stir evenly with the alumina microspheres prepared above, spray dry, and bake at 500° C. to obtain alumina microspheres with a particle size of 20-150 μm. Weigh 25.25g of ferric nitrate nonahydrate, 9.14g of zinc nitrate hexahydrate and 1.70g of barium nitrate and dissolve them in 200g of water, impregnate the above solutions on alumina microspheres, then dry at 60°C for 15h and roast at 500°C for 4h to obtain the catalyst . The catalyst evaluation results showed that the propane conversion rate was 35.08%, and the selecti...

Embodiment 2

[0035] Add 33g of macroporous pseudo-boehmite into water and stir evenly, add appropriate amount of acetic acid, adjust the pH value to about 4-5, form a gel at 70°C, spray dry, and roast at 900°C for 4 hours to obtain oxide powder with an average particle size of 22μm. Aluminum microspheres.

[0036] Add 100g of small-pore pseudo-boehmite into water and stir evenly, add an appropriate amount of hydrochloric acid to form a colloid at 80°C, add 0.2g of Sb 2 o 3 Stir evenly with the alumina microspheres prepared above, spray dry, and calcinate at 600° C. to obtain alumina microspheres with a particle size of 20-150 μm. Weigh 7.78g of nickel nitrate hexahydrate, 9.72g of copper nitrate trihydrate, 6.41g of magnesium nitrate hexahydrate and dissolve them in 200g of water, impregnate the above solution on alumina microspheres, then dry at 80°C for 10h and roast at 600°C for 6h, Get a catalyst. The catalyst evaluation results showed that the propane conversion rate was 34.37%, an...

Embodiment 3

[0038] Add 28g of macroporous pseudo-boehmite into water and stir evenly, add an appropriate amount of acetic acid, adjust the pH value to about 4-5, form a gel at 80°C, spray dry, and roast at 900°C for 4 hours to obtain oxide powder with an average particle size of 28μm. Aluminum microspheres.

[0039] Add 86g of small-pore pseudo-boehmite into water and stir evenly, add appropriate amount of hydrochloric acid to form a colloid at 70°C, add 0.8g of In2O3 and the alumina microspheres prepared above, stir evenly, spray dry, and roast at 700°C to obtain the particle size 20-150μm alumina microspheres. Weigh 7.78g of nickel nitrate hexahydrate, 9.72g of copper nitrate trihydrate, 6.41g of magnesium nitrate hexahydrate and dissolve them in 200g of water, impregnate the above solution on alumina microspheres, then dry at 80°C for 10h and roast at 800°C for 6h, Get a catalyst. The catalyst evaluation results showed that the propane conversion rate was 36.27%, and the selectivity ...

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Abstract

The invention relates to a dehydrogenation catalyst, in particular to a fluidized bed alkane dehydrogenation catalyst and a preparation method thereof. The catalyst includes components A, B, C, D, E, wherein component A is selected from any one or more oxides of Fe, Ni, Co, W, Mo, and component B is selected from Ge, Sb , any one or more oxides of In, Te, component C is selected from any one or more oxides of Zn, Cu, Ga, Mn, and component D is selected from Ba, Ca, Mg An oxide of any one of , K, and Na, and the component E is a carrier. The catalyst does not contain precious metal Pt, does not contain Cr and V which pollute the environment, and is a catalyst with low price and environmental protection. The catalyst has high alkane conversion rate and high olefin selectivity, and can be used in a fluidized bed reaction device.

Description

technical field [0001] The invention relates to a dehydrogenation catalyst, in particular to a fluidized bed alkane dehydrogenation catalyst and a preparation method of the catalyst. Background technique [0002] Alkanes dehydrogenation technology has been industrialized, and currently there are two main types of catalysts used: Pt-based catalysts and CrOx-based catalysts. The cost of Pt-based catalysts is too high, and they are sensitive to poisons such as sulfur and olefins. Therefore, the requirements for raw materials are relatively strict, and raw materials need to be pretreated. CrOx-based catalysts are easy to coke and deactivate quickly, and need to be regenerated repeatedly; moreover, Cr6+ is highly toxic and is a carcinogen announced by the International Anti-Cancer Research Center and the American Toxicology Organization. In the national industrial wastewater discharge standard, hexavalent chromium is the first category Pollutants, hexavalent chromium compounds w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/80B01J23/78B01J23/825B01J23/888B01J23/34B01J23/883B01J23/889C07C5/333C07C11/06
CPCB01J23/80B01J23/78B01J23/825B01J23/888B01J23/34B01J23/883B01J23/8892C07C5/333C07C11/06Y02P20/52
Inventor 梁衡韩伟艾珍潘相米吴砚会李扬李博
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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