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Carbon nanometer tube loaded rhodium catalyst system and application thereof

A rhodium catalyst and carbon nanotube technology, which is applied in the direction of carbon monoxide reaction to prepare carboxylic acid, physical/chemical process catalyst, organic compound/hydride/coordination complex catalyst, etc., can solve the limitation of methyl acetate conversion rate and reaction formation Efficiency reduction and other issues, to achieve the effect of ensuring stability and high activity, improving space-time yield, and reducing loss

Inactive Publication Date: 2016-11-16
兖矿水煤浆气化及煤化工国家工程研究中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existence of this chemical reaction equilibrium limits the possible conversion rate of methyl acetate in the carbonylation reaction, and the participation of the reverse reaction reduces the reaction generation efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Rhodium compound is RhI in embodiment 1, embodiment 3, embodiment 5 and embodiment 7 3 ; Rhodium compound is [Rh (CO) in embodiment 2, embodiment 4, embodiment 6 and embodiment 8 2 I 2 ].

[0030] In an embodiment, the length of the carbon nanotube is 100-200 nm, and the inner diameter of the tube is 0.4-1 nm.

[0031] In the embodiment, the American parr-4848 nickel-based alloy reactor is used, the gas chromatograph is Shimadzu Gas Chromatography-Mass Spectrometry (GC-MS) (GCMS-TQ8040), and the liquid chromatograph is Shimadzu High Performance Liquid Chromatography Chromatography-mass spectrometry (HPLC-MS) (LCMS-2020), metal analysis is an inductively coupled plasma emission spectrometer (ICP) (Prodigy XP) from Lehman Corporation of the United States, and the phase analysis and qualitative analysis of solid powder are from Japan Island The X-ray diffractometer (XRD) (XRD-6100) of Tianjin Company was used, and the catalyst was characterized by a chemical adsorption ...

Embodiment 2

[0036] Single-walled carbon nanotube-supported rhodium compound: the carbon nanotube in the catalyst system is 4 times the mass of the rhodium compound, and the halogen co-catalyst is 30 times the mass of the rhodium compound.

[0037] In a 1900ml nickel-based alloy autoclave, add 1.0 g of single-walled carbon nanotube-loaded rhodium compound (calculated as Rh), 5.9 mol of methanol, 9 mol of acetic acid, and 1.52 mol of methyl iodide, replace the autoclave with carbon monoxide, and boost the pressure to 4.0 MPa, Set the stirring speed to 800 rpm, raise the temperature of the reaction to 180°C-185°C, control the constant temperature, and the reaction time is 24min. The conversion rate of methanol was 96.2%, and the space-time yield of acetic acid was 34molAcOH / (L·h).

Embodiment 3

[0039] Single-walled carbon nanotube-supported rhodium compound: the carbon nanotube in the catalyst system is 1.5 times the mass of the rhodium compound, and the halogen promoter is 30 times the mass of the rhodium compound.

[0040] In a 1900ml nickel-based alloy autoclave, add 1.5g of single-walled carbon nanotube loaded rhodium compound (calculated as Rh), the catalyst concentration is 1585ppm, methanol 5.9mol, acetic acid 9mol, methyl iodide 1.52mol, replace the reactor with carbon monoxide, and Press down to 4.0MPa, set the stirring speed to 800 rpm, raise the reaction temperature to 180°C-185°C, control the constant temperature, and the reaction time is 20min. The conversion rate of methanol was 97.0%, and the space-time yield of acetic acid was 39molAcOH / (L·h).

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Abstract

The invention discloses a carbon nanometer tube loaded rhodium catalyst system and an application thereof. The carbon nanometer tube loaded rhodium catalyst system is characterized in that a carbon nanometer tube loaded rhodium compound is taken as active species; a halogen promoter is added; a high-concentration noble metal rhodium catalyst can exist in a reaction system in a carbonylation reaction through the carbon nanometer tube loaded rhodium catalyst; the pulp liquid phase reaction can be achieved; the carbonyl synthesis rate is increased and the noble metal loss is reduced; the catalyst provided by the invention can increase the carbonyl synthesis rate and the yield of industrial device.

Description

technical field [0001] The present invention relates to a catalytic system and its application for oxo-synthesis of acetic acid and acetic anhydride, in particular to a carbon nanotube supported rhodium catalyst system and its application. technical background [0002] Acetic acid is an important organic chemical raw material, mainly used in the production of vinyl acetate monomer, acetic anhydride, terephthalic acid, polyvinyl alcohol, acetates, cellulose acetate, etc. It is widely used in chemical industry, light textile, medicine, dyestuff and other industries. In recent years, due to the development of PTA and downstream products of acetic acid, acetic acid has become one of the rapidly growing petrochemical products. Acetic anhydride, also known as acetic anhydride, is a compound used in large quantities as a raw material for the production of cellulose acetate, and is also an important raw material for the synthesis of chemical products such as drugs, spices and dyes....

Claims

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Application Information

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IPC IPC(8): B01J31/02B01J31/20B01J31/26B01J31/30C07C51/12C07C53/08C07C51/56C07C53/12
CPCB01J31/0231B01J31/20B01J31/26B01J31/30C07C51/12C07C51/56C07C53/08C07C53/12
Inventor 李智李涛刘海燕于丽红吴永国许广宇戴武军
Owner 兖矿水煤浆气化及煤化工国家工程研究中心有限公司
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