Loaded type transition metal phosphide catalyst as well as preparation method and application thereof

A transition metal and catalyst technology, applied in the field of supported transition metal phosphide catalysts and their preparation, can solve problems such as poor stability, easy aggregation and deactivation of copper-based catalysts, and increased catalyst production costs, achieving good stability and low production costs. The effect of low cost and simple preparation method

Active Publication Date: 2016-01-20
中科合成油内蒙古技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology allows for efficient conversion between two chemicals called dialkoxyanedioic acid or DMOA into other compounds like formaldehydes that are useful materials used industrially. It also provides technical benefits such as improved efficiency over existing methods while being less expensive than current options.

Problems solved by technology

This patented technical problem addressed in this patent relates to improving the efficiency and economy of producing various types of valuable compounds like methionitrile, acetaminophen, vinilamides, cyclohexane diamines, trimellones, pyridinetrils, napthenes, olefms, alifibrous bases, alkenols, alkynoids, sorghum grape seed extractors, diketoacids, succinitrilics, glutarboxymakers, lactams, iminoazolidanes, quaternary salts, sulfur containing agents, metal complexes, and other substances commonly found throughout commercial industries worldwide. However, current techniques involve expensive starting sources and complicated purifying procedures.

Method used

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  • Loaded type transition metal phosphide catalyst as well as preparation method and application thereof
  • Loaded type transition metal phosphide catalyst as well as preparation method and application thereof
  • Loaded type transition metal phosphide catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 1) Weigh 7.7g of nickel nitrate and 3.5g of diammonium hydrogen phosphate, add them into 23ml of deionized water to form a precipitate, add 2.4ml of nitric acid dropwise within 6min to dissolve the precipitate, and obtain an impregnation solution;

[0049] 2) impregnate an equal volume of 14g SiO with the impregnating solution obtained in step 1) 2 on the carrier, placed at room temperature for 8 hours, dried at 110°C for 14 hours, and calcined at 420°C for 3 hours to obtain the catalyst precursor;

[0050] 3) The catalyst precursor obtained in step 2) is heated to 550°C at a heating rate of 4°C / min in a hydrogen atmosphere to perform a reduction reaction, and H 2 The airspeed is 2000h -1 , treated at constant temperature for 3 hours, after the reaction was completed, the temperature was cooled to room temperature, and 1v% O 2 / N 2 Mixed gas passivation treatment for 4 hours to obtain the supported transition metal phosphide catalyst provided by the present invention...

Embodiment 2

[0058] 1) Weigh 14.5g of nickel nitrate and 6.6g of diammonium hydrogen phosphate, add them into 18ml of deionized water to form a precipitate, add 4.5ml of nitric acid dropwise within 12min to dissolve the precipitate, and obtain an impregnating solution;

[0059] 2) impregnating an equal volume of 31 g of ZnO carrier with the impregnating solution obtained in step 1), placing it at room temperature for 4 hours, drying at 110°C for 12 hours, and roasting at 400°C for 5 hours to obtain a catalyst precursor;

[0060] 3) The catalyst precursor obtained in step 2) is heated to 600 ° C at a heating rate of 2 ° C / min in a hydrogen atmosphere to perform a reduction reaction, H 2 The airspeed is 2500h -1 , treated at constant temperature for 3 hours, after the reaction was completed, the temperature was lowered to room temperature, and 1% O 2 / N 2 Mixed gas passivation treatment for 4 hours to obtain the supported transition metal phosphide catalyst provided by the present invent...

Embodiment 3

[0069] 1) Weigh 9.73g of nickel nitrate and 4.42g of diammonium hydrogen phosphate, add them into 14ml of deionized water to form a precipitate, add 3ml of nitric acid dropwise within 8min to dissolve the precipitate, and obtain an impregnation solution;

[0070] 2) Immerse an equal volume of 18.5g TiO with the impregnating solution obtained in step 1) 2 on the carrier, placed at room temperature for 7 hours, dried at 110°C for 9 hours, and calcined at 480°C for 4 hours to obtain the catalyst precursor;

[0071] 3) The catalyst precursor obtained in step 2) is heated to 650°C at a heating rate of 1°C / min in a hydrogen atmosphere to perform a reduction reaction, and H 2 The airspeed is 3600h -1 , treated at a constant temperature for 4 hours, after the reaction was completed, the temperature was cooled to room temperature, and 1v% O 2 / N 2 Mixed gas passivation treatment for 4 hours to obtain the supported transition metal phosphide catalyst provided by the present invention...

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Abstract

The invention discloses a loaded type transition metal phosphide catalyst as well as a preparation method and application thereof. The loaded type transition metal phosphide catalyst is prepared form NixPy and a carrier, wherein the NixPy is loaded on the carrier. In the loaded type transition metal phosphide catalyst, the carrier is selected from at least one of silicon dioxide, titanium dioxide, zinc oxide and active carbon; the NixPy accounts for 8-16 parts by mass and the carrier accounts for 84-92 parts by mass; and the mol ratio of Ni to P is (0.5-2) to 1. The catalyst takes diammonium hydrogen phosphate as a phosphorus source, takes metal nickel nitrate as a precursor, and takes one of the silicon dioxide, the titanium dioxide, the zinc oxide and the active carbon as the carrier; by adopting a program heating and reduction method, the loaded type NixPy catalyst is rapidly and efficiently synthesized under a reducing atmosphere of H2 and the like; and the catalyst has good dimethyl oxalate hydrogenation activity, and methyl glycolate and glycol selectivity.

Description

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Claims

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Application Information

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Owner 中科合成油内蒙古技术研究院有限公司
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