Supported catalyst for preparing propylene by propane selective oxidization and its prepn.

A supported catalyst and selective oxidation technology, which can be used in physical/chemical process catalysts, carbon-based compound preparation, chemical instruments and methods, etc. The effect of good stability, strong mechanical strength and simple preparation method

Inactive Publication Date: 2008-12-10
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some catalysts in the reported patents or literatures have the disadvantages of being difficult to repeat, poor in mechanical strength, and low yield of acrolein per pass, which limits the industrial application of this method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Catalyst preparation

[0018] Stir 40ml of ethyl orthosilicate, 80ml of ethylene glycol and 80ml of distilled water at room temperature to prepare a solution I. Dissolve 0.353g of ammonium molybdate, 0.070g of ammonium metavanadate and 0.106g of telluric acid in 20ml of distilled water at 80°C 0.119g of niobium oxalate was dissolved in 2ml of distilled water at room temperature to prepare solution III, and solution II and solution III were respectively added to solution I under constant stirring, and after mixing evenly, adjust the pH value of the solution to 6 with dilute ammonia water , and then heated in a water bath at 70°C to form a transparent sol, and then aged at room temperature to form a gel. The catalyst MoVTeNbO / SiO can be obtained by heating the sample dried at 110 °C for 10 h at a rate of 2 °C / min to 600 °C for 2 h. 2 .

[0019] (2) Evaluation conditions

[0020] Catalyst consumption is 0.2g, is placed in the fixed-bed quartz tube reactor (inside di...

Embodiment 2

[0022] In embodiment 1, the 80ml ethylene glycol in catalyst preparation (1) is changed into 20ml isopropanol and promptly cost embodiment. The performance evaluation results of the catalysts are shown in Table 1.

Embodiment 3

[0024] In embodiment 1, the 80ml ethylene glycol in catalyst preparation (1) is changed into 40ml ethanol and promptly cost embodiment.

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PUM

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Abstract

The invention relates to a method for preparing acrolein load catalyst via propane selective oxidization and sol-gel method, wherein the catalyst is MoVTeNbO / SiO2, while Mo is 0.61-3.68%, V is 0.18-1.10%, Te is 0.14-0.85%, Nb is 0-0.37%, and Si is 94-99%. And the preparation comprises that preparing ethyl silicate, lower alcohol and water into solution I, preparing ammonium vanadate, ammonium molybdate and telluric acid into solution II, preparing oxalic acid niobium into solution III, adding II and III into I, adjusting pH value, heating in water bath to obtain sol, aging into gel, drying, baking to obtain catalyst. The invention has simple process, high repeatability, stability and mechanical strength, large specific surface area, high catalysis property and 18.3% acrolein recycle rate.

Description

technical field [0001] The invention relates to a supported catalyst for producing acrolein through selective oxidation of propane. Background technique [0002] Low-carbon alkanes widely exist in natural gas, petroleum liquefied gas and refinery gas, and are mainly used as fuels with low efficiency, resulting in a large amount of unnecessary energy waste. The catalytic conversion of low-carbon alkanes to olefins and containing Research on important chemical raw materials such as oxygen organics is of great strategic significance for the use of abundant natural gas and coal-bed methane as non-oil-based energy and chemical raw materials in today's international energy, especially the fierce competition in oil supply and demand. [0003] Acrolein and acrylic acid are important organic chemical raw materials and have a wide range of uses. Acrolein can be used as a raw material for the synthesis of chemical products such as acrylic acid, methionine, glycerin, and pentylene glyco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/055B01J21/08C07C45/33C07C47/22
Inventor 伊晓东章小兵翁维正万惠霖
Owner XIAMEN UNIV
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