High stability Ni-based phosphide catalyst and its preparation method

A high-stability, catalyst technology, applied in the preparation of hydroxyl compounds, organic compounds, physical/chemical process catalysts, etc., can solve the problems of poor catalyst price stability, achieve good technical effects, improve stability, and reduce acidity Effect

Active Publication Date: 2014-11-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is that the Ni-based catalyst prepared by the prior art is applied to the problem of poor catalyst valence stability in the process of preparing isopropanol from acetone hydrogenation, and a new high-stability Ni-based phosphide catalyst is provided

Method used

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  • High stability Ni-based phosphide catalyst and its preparation method
  • High stability Ni-based phosphide catalyst and its preparation method
  • High stability Ni-based phosphide catalyst and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take commercially available pseudo-boehmite as Al source, 3% HNO by weight 3 The aqueous solution is used as a binder, and an appropriate amount of Mg is introduced 2+ After extrusion molding, it is dried at 120 ° C and calcined at 600 ° C to obtain a composition of 5% MgO-95% Al 2 O 3 vector.

[0026] Weigh 6.7g Ni (NO 3 ) 2 ·6H 2 O and 2.4g (NH 4 ) 6 Mo 7 O 24 ·6H 2 O 4H 2 O was dissolved in 10.0g distilled water, and a certain amount of 1.7g NH was added. 4 H 2 PO 4 or 2.4g (NH 4 ) 2 H 2 PO 4 , to which concentrated HNO was added dropwise 3 Dissolve the precipitate, and adjust the pH value between 4 and 5 to form solution I; add 3.5 g of citric acid to solution I to form solution II; heat solution II to 70 ° C, add dropwise to 10.0 g of carrier while hot , calcined at 550°C for 8 hours after drying at 120°C. The catalyst was used in H 2 It was reduced at 650°C for 12 hours. The catalyst composition is: 12%NiO-10MoOx-5%POx-3.6%MgO-69.4%Al 2 O 3...

Embodiment 2

[0028] Take commercially available pseudo-boehmite as Al source, 1.5% HNO by weight 3 and 1.5%H 3 PO 4 The solution is a binder, and an appropriate amount of Mg is introduced 2+ After extrusion, it is dried at 120 °C and calcined at 600 °C to obtain a composition of 5% MgO-95% Al 2 O 3 vector. The catalyst preparation method and evaluation conditions are the same as those in Example 1, and the reaction results are shown in Table 1.

Embodiment 3

[0030] The commercially available pseudo-boehmite powder was calcined at 600 ℃ for 4 hours to obtain δ-Al 2 O 3 , take the same amount of δ-Al 2 O 3 With pseudo-boehmite as Al source, 1.5% HNO by weight 3 and 1.5%H 3 PO 4 The solution is a binder, and an appropriate amount of Mg is introduced 2+ , Ca 2+ After extrusion molding, it is dried at 120 °C and calcined at 600 °C to obtain a composition of 5%MgO-5%CaO-90%Al 2 O 3 vector. The catalyst preparation method is the same as that in Example 1. The catalyst preparation method and evaluation method are the same as those in Example 1, and the reaction results are shown in Table 1.

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Abstract

The invention relates to a high stability Ni-based phosphide catalyst and its preparation method, and aims to mainly solve the problem of poor stability of existing acetone hydrogenation catalysts. The invention adopts a high stability Ni-based phosphide catalyst, which comprises the following components by weight percent: a) 5.0-15.0% of NiO; b) 5.0-25.0% of MoOx; c) 5.0-15.0% of POx; d) 45.0-75.0% of Al2O3; and E) 5-15% of at least one of MgO, BaO or CaO. The catalyst and the technical scheme of its preparation method of the invention well solve the problem, and can be used in the industrial production of isopropanol through acetone hydrogenation.

Description

technical field [0001] The invention relates to a highly stable Ni-based phosphide catalyst and a preparation method thereof. technical background [0002] Transition metal phosphides are a class of compounds with metal and semiconducting properties, which have significant characteristics in electricity, mechanics, corrosion resistance, etc. At the same time, they are good conductors of heat and electricity, with high thermal and chemical stability. , thus arousing widespread concern. Since metal phosphides with large specific surface area and good catalytic activity were prepared by temperature-programmed reduction in 1998, people have carried out a series of new explorations on the synthesis and catalytic performance of phosphides. As new catalysts, phosphides are in Hydrodesulfurization, hydrodenitrogenation, hydrorefining, hydrazine decomposition, etc. have all achieved good catalytic applications. [0003] The hydrogenation of acetone can be carried out in a fixed bed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/19C07C31/10C07C29/145
Inventor 王辉王德举刘仲能郭友娣
Owner CHINA PETROLEUM & CHEM CORP
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