Supported Catalyst, Its Activated Form, and their Preparation and Use

a supported catalyst and activated form technology, applied in the field of porous catalysts, can solve the problems of raney nickel catalysts, inconvenient handling, and inability to use conventional fixed-bed reactions, and achieve the effects of low active metal loading amount, simple method, and low impurity conten

Inactive Publication Date: 2015-08-20
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010]An objective of the present invention is to provide a supported catalyst comprising: an organic polymer material support, and Raney alloy particles supported on the organic polymer material support (particularly in the surface layer), wherein substantially all of the Raney alloy particles are partially embedded into the organic polymer material support. The catalyst may be prepared by a simple method, has less impurities, a high active metal loading amount, and a high active metal utilization ratio, and when being used in a fixed bed reaction after being activated, said catalyst have both a very high activity and a very good selectivity.

Problems solved by technology

Raney nickel catalysts are generally present in powder form and inflammable so that their handle is not convenient.
Hence, Raney nickel catalysts are mostly used in small-scale catalytic hydrogenation reactions in fine chemical industry field, but cannot be used in conventional fixed bed reactions.

Method used

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  • Supported Catalyst, Its Activated Form, and their Preparation and Use

Examples

Experimental program
Comparison scheme
Effect test

example 1

The Preparation of a Raney Ni / Polypropylene Catalyst

[0092]Powdery polypropylene (Maoming Petrochemical, F280M) was extruded with a twin screw extruder and cut into particles of Φ3 nm×3 to 5 mm. 50 Grams of the polypropylene particles were placed in 2000 g of 100 to 200 mesh powdery nickel-aluminum alloy having a Ni content of 48 wt. % and an aluminum content of 52 wt. %. The mixture of the polypropylene particles and the powdery nickel-aluminum alloy was mould pressed in a platen press at 200° C. under a pressure of 7 MPa for 10 min, then removed and cooled. The mixture was sieved to separate catalyst particles from the excessive powdery nickel-aluminum alloy, to obtain 200 g supported catalyst. It was visually observed that the surface of the catalyst particles was completely covered by the nickel-aluminum alloy powder.

[0093]400 g of 20 wt % NaOH aqueous solution was formulated with deionized water and added to 40 g of the above-prepared supported catalyst particles. The resultant ...

example 2

The Preparation of a Raney Ni / Polypropylene Catalyst

[0094]Powdery polypropylene (Maoming Petrochemical, F280M) was mould pressed in a platen press at 200° C. under a pressure of 7 MPa for 10 min, to form a sheet having a thickness of approximate 2 mm.

[0095]In the platen press, two layers of 100 mesh to 200 mesh powdery nickel-aluminum alloy each having a thickness of about 2 mm were spread above and below a polypropylene sheet weighing 20 g prepared above, respectively, with the nickel-aluminum alloy having a Ni content of 48 wt. % and an aluminum content of 52 wt. %. Mould pressing was carried out at a temperature of 200° C. under a pressure of 7 MPa for 10 min, then the polypropylene sheet was removed and cooled, to afford a supported catalyst sheet weighing 120 g. It was visually observed that both the upper and lower surfaces of the polypropylene sheet were covered completely by the nickel-aluminum alloy powder.

[0096]The catalyst sheet was mechanically cut into particles having ...

example 3

The Preparation of a Raney Ni / Nylon-6 Catalyst

[0098]50 Grams of Nylon-6 particles (Baling Petrochemical, BL2340-H, having a particle size of Φ2.5×3 mm) were placed in 2000 g of 100 to 200 mesh powdery nickel-aluminum alloy having a Ni content of 48 wt. % and an aluminum content of 52 wt. %. The mixture of the Nylon-6 particles and the powdery nickel-aluminum alloy was mould pressed in a platen press at 250° C. under a pressure of 7 MPa for 10 min, then removed and cooled. The mixture was sieved to separate catalyst particles from the excessive powdery nickel-aluminum alloy, to obtain 210 g supported catalyst. It was visually observed that the surface of the catalyst particles was completely covered by the nickel-aluminum alloy powder.

[0099]400 g of 20 wt % NaOH aqueous solution was formulated with deionized water and added to 40 g of the above-prepared supported catalyst particles. The resultant mixture was maintained at 85° C. for 4 hours, then the liquid was filtered off, and the ...

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Abstract

A supported catalyst and preparation method thereof, the catalyst comprising an organic polymer material carrier and Raney alloy particles supported on the organic polymer material carrier, wherein substantially all of the Raney alloy particles are partially embedded in the organic polymer material carrier. The catalyst can be used in hydrogenation, dehydrogenation, amination, dehalogenation or desulfuration reactions.

Description

CROSS REFERENCE OF RELATED APPLICATIONS[0001]The present application claims the benefit of the Chinese Patent Application No. 201210277334.4, filed on Aug. 6, 2012, which is incorporated herein by reference in their entirety and for all purposes.FIELD OF THE INVENTION[0002]The present invention relates to a supported catalyst, its activated form, and their preparation and use; more particularly, to the improvement of porous catalysts prepared by Raney method.BACKGROUND ART[0003]In the field of catalysis, “Raney method” refers to a method for preparing active metal catalysts, which method comprises: i) preparing at first a bi- or more-component alloy containing an active metal, and ii) then leaching out at least one metal component, leaving a metal having a porous structure and having a relatively high catalytically activity. Step ii) is also referred to as “activation”. For example, M. Raney invented firstly Raney nickel catalyst (Industrial and Engineering Chemistry, 1940, Vol. 32,...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B01J25/02B01J31/28C07C29/141B01J37/00C07C1/06C07C1/04B01J31/34B01J25/00
CPCB01J25/00C07B35/02C07B35/04C07B35/06B01J25/02B01J31/06B01J37/00B01J2231/76B01J2231/64B01J31/28B01J31/34B01J37/0009B01J2231/643C07C1/0435C07C1/066C07C29/141C07C2525/00C07C2525/02
Inventor DAI, WEIJIANG, HAIBINLU, SHULIANGZHANG, XIAOHONGWANG, GUOQINGQIAO, JINLIANGPENG, HUI
Owner CHINA PETROCHEMICAL CORP
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