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Process for the selective oxidation of ethane to ethylene

A technology of ethane and ethylene, which is applied in the field of ethylene preparation, and can solve the problems that a single catalyst cannot be realized.

Inactive Publication Date: 2011-12-14
CELANESE INT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This high rate of ethane conversion was only achieved with the catalyst mixture, but not for a single catalyst comprising components A and B

Method used

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  • Process for the selective oxidation of ethane to ethylene
  • Process for the selective oxidation of ethane to ethylene

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Embodiment 1

[0032] Formula Mo is prepared as follows 1 V 0.33 Ta 0.12 Te 0.28 o z Catalyst: 25.0 g of ammonium heptamolybdate tetrahydrate (Aldrich Chemical Company), 5.47 g of ammonium metavanadate (Aldrich Chemical Company) and 9.10 g of telluric acid (Aldrich Chemical Company) were dissolved in 400 mL of water by heating to 80°C. After cooling to room temperature, 28.0 mL of an aqueous solution of tantalum oxalate (0.5M Ta, 1.5M oxalate) was added. Water was removed by a rotary evaporator in a warm water bath at 50°C to obtain a solid catalyst precursor. The solid was dried at 120°C before calcination.

[0033] The catalyst precursor solid was calcined at 600° C. for 2 hours in a nitrogen pre-purged lidded crucible. The oven was rapidly heated at 10°C / min to °C and held for 2 hours, followed by rapid heating at 10°C / min to 600°C and held at 600°C for 2 hours. The catalyst thus obtained was ground into a fine powder, pressed in a mould, followed by crushing and sieving to obtain ...

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PUM

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Abstract

The disclosed process selectively produces ethylene by oxidizing ethane in the presence of oxygen using a catalyst of formula MoaVvTaxTey. Preferably, a is 1.0, v is about 0.01 to about 1.0, x is about 0.01 to about 1.0, and y is about 0.01 to about 1.0.

Description

field of invention [0001] The present invention relates to an ethylene preparation. In particular, a method for the selective oxidation of ethane to ethylene using a mixed oxide catalyst comprising vanadium and tungsten or molybdenum is disclosed. Background of the invention [0002] Oxidative dehydrogenation of ethane to ethylene in the gas phase at temperatures above 500°C has been discussed, for example, in US Patents 4,250,346, 4,524,236 and 4,568,790. [0003] U.S. Patent 4,250,346 describes the oxidation of ethane to ethylene using a catalyst composition comprising the elements molybdenum, X and Y in the ratio a:b:c, where X is Cr, Mn, Nb, Ta, Ti, V and / or W , Y is Bi, Ce, Co, Cu, Fe, K, Mg, Ni, P, Pb, Sb, Si, Sn, Tl and / or U, a is 1, b is 0.05-1, c is 0-2 . For Co, Ni and / or Fe, the total value of c must be less than 0.5. The reaction is carried out in the gas phase at temperatures below about 550°C. The efficiency of conversion to ethylene is 50-94%, depending o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C5/48C07C11/04C07C51/215C07C53/08
CPCC07C51/215C07C2523/889C07C5/48Y02P20/52C07C11/04C07C53/08
Inventor D·A·赖安
Owner CELANESE INT CORP
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