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Hydrogenation catalyst for the preparation of cyclohexylamine

A hydrogenation catalyst and catalyst technology, which can be used in physical/chemical process catalysts, preparation of amino compounds, preparation of organic compounds, etc., can solve problems such as low selectivity and low yield of cyclohexylamine, and achieve outstanding technical effects. Effect

Active Publication Date: 2021-12-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is the problem of low yield and low selectivity of cyclohexylamine, and a new hydrogenation catalyst for preparing cyclohexylamine is provided. High and selective features

Method used

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  • Hydrogenation catalyst for the preparation of cyclohexylamine
  • Hydrogenation catalyst for the preparation of cyclohexylamine
  • Hydrogenation catalyst for the preparation of cyclohexylamine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Modified carrier P / Al 2 o 3 Preparation of:

[0052] (1) Phosphoric acid (H 3 PO 4 ) aqueous solution 180ml impregnated in 1L diameter 6mm, pore volume is 0.92cm 3 / g, the specific surface area is 200cm 2 / g Al 2 o 3 , standing for 24 hours, and drying at 110° C. for 4 hours to obtain the carrier precursor I.

[0053] (2) Calcining the carrier precursor I at 630°C for 5h under a nitrogen gas atmosphere to obtain the modified carrier P / Al 2 o 3 .

[0054] The P content in the carrier was determined to be 1.52 g / L by ICP.

[0055] Preparation of hydrogenation catalyst:

[0056] (i) Cobalt ammonium sulfate containing 2.32g Co ((NH 4 ) 2 Co(SO 4 ) 2 ·6H 2 O) and calcium acetate containing 1.75g ​​Ca (Ca(OAc) 2 ·H 2 O) 200ml of aqueous solution impregnated in P / Al 2 o 3 , to obtain catalyst precursor I;

[0057] (ii) drying at 110° C. for 4 hours to obtain the catalyst.

[0058] The Co content of the catalyst measured by ICP is 2.32g / L, and the Ca conte...

Embodiment 2

[0063] Modified carrier P / Al 2 o 3 Preparation of:

[0064] (1) Phosphoric acid (H 3 PO 4 ) aqueous solution 180ml impregnated in 1L diameter 6mm, pore volume is 0.92cm 3 / g, the specific surface area is 200cm 2 / g Al 2 o 3 , standing for 24 hours, and drying at 110° C. for 4 hours to obtain the carrier precursor I.

[0065] (2) Calcining the carrier precursor I at 630°C for 5h under a nitrogen gas atmosphere to obtain the modified carrier P / Al 2 o 3 .

[0066] The P content in the carrier was determined to be 1.52 g / L by ICP.

[0067] Preparation of hydrogenation catalyst:

[0068] (i) Cobalt ammonium sulfate containing 2.32g Co ((NH 4 ) 2 Co(SO 4 ) 2 ·6H 2 O) and ammonium tungstate containing 1.75g ​​W ((NH 4 ) 10 W 12 o 41 4H 2 O) be dissolved in hot water to obtain 200ml of impregnating solution and impregnate in P / Al 2 o 3 , to obtain catalyst precursor I;

[0069] (ii) drying at 110° C. for 4 hours to obtain the catalyst.

[0070] The Co content ...

Embodiment 3

[0099] Modified carrier P / Al 2 o 3 Preparation of:

[0100] (1) Ammonium phosphate (NH 4 ) 3 PO 4 ) aqueous solution 180ml impregnated in 1L diameter 6mm, pore volume is 0.92cm 3 / g, the specific surface area is 200cm 2 / g Al 2 o 3 , standing for 24 hours, and drying at 110° C. for 4 hours to obtain the carrier precursor I.

[0101] (2) Calcining the carrier precursor I at 630°C for 5h under a nitrogen gas atmosphere to obtain the modified carrier P / Al 2 o 3 .

[0102] The P content in the carrier was determined by ICP to be 0.80 g / L.

[0103] Preparation of hydrogenation catalyst:

[0104] (i) Cobalt ammonium sulfate containing 2.32g Co ((NH 4 ) 2 Co(SO 4 ) 2 ·6H 2 O) and beryllium acetate (Be(OAc) containing 1.75g ​​Be 2 ·H 2 O) be dissolved in hot water to obtain 200ml of impregnating solution and impregnate in P / Al 2 o 3 , to obtain catalyst precursor I;

[0105] (ii) drying at 110° C. for 4 hours to obtain the catalyst.

[0106] The Co content of th...

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Abstract

The invention relates to a hydrogenation catalyst for preparing cyclohexylamine, which mainly solves the problem of low yield and selectivity of aniline catalytic hydrogenation to synthesize cyclohexylamine in the prior art. A hydrogenation catalyst for the preparation of cyclohexylamine is used, including a carrier and an active component, and the carrier is phosphorus-modified Al 2 o 3 , the active components include Co elements and promoter elements; the promoter elements include the technical scheme of at least one metal element selected from alkaline earth metals and VIB group metals, which solves this problem better and can be used for cyclohexylamine in industrial production.

Description

technical field [0001] The present invention relates to hydrogenation catalysts for the preparation of cyclohexylamine. Background technique [0002] Cyclohexylamine, also known as hexahydroaniline and aminocyclohexane, is a colorless and transparent liquid with a strong fishy amine smell and is miscible with water and common organic solvents. It is an important organic chemical raw material and fine chemical intermediate, mainly used in rubber additives, food additives, anti-corrosion, papermaking, plastic processing and textile industries. [0003] Foreign production and application are mainly concentrated in western developed countries and regions. The main manufacturers include American Air Products Corporation, Celanese Corporation, German BASF Corporation, Bayer Corporation and other manufacturers of various sizes. However, in Europe, cyclohexylamine has been in short supply due to the limitation of hydrogen raw materials. The domestic production capacity of cyclohex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/185B01J27/188B01J27/19C07C209/72C07C211/35
CPCC07C209/72B01J27/1853B01J27/188B01J27/19C07C211/35
Inventor 查晓钟杨运信
Owner CHINA PETROLEUM & CHEM CORP