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Preparation method of eggshell-type noble metal catalyst and method of using same for dibenzofuran hydrogenation ring opening to prepare o-phenylphenol

A noble metal catalyst, o-phenylphenol technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, preparation of organic compounds, chemical instruments and methods, etc., can solve the problem of decreased catalyst activity and selectivity, high catalyst cost , high equipment investment and other issues, to achieve good industrial application prospects, reduce catalyst costs, and evenly distribute the effect

Active Publication Date: 2016-08-24
DALIAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has obvious disadvantages, such as high equipment investment and high energy consumption.
The reaction uses supported noble metals as catalysts, and the cost of the catalyst is high, and after 100 hours of reaction, the activity and selectivity of the catalyst decrease significantly

Method used

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  • Preparation method of eggshell-type noble metal catalyst and method of using same for dibenzofuran hydrogenation ring opening to prepare o-phenylphenol
  • Preparation method of eggshell-type noble metal catalyst and method of using same for dibenzofuran hydrogenation ring opening to prepare o-phenylphenol
  • Preparation method of eggshell-type noble metal catalyst and method of using same for dibenzofuran hydrogenation ring opening to prepare o-phenylphenol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: chloroplatinic acid and sodium acetate are dissolved in ethylene glycol respectively, the concentration of chloroplatinic acid is 0.01mol / L, the polyol solution aging of chloroplatinic acid is 30d, the concentration of sodium formate is 0.05mol / L, sodium formate The molar ratio of chloroplatinic acid and chloroplatinic acid is 5, spherical or columnar support MgO / SiO 2 Add it into the chloroplatinic acid solution, control the immersion time to 60s, and the solution viscosity to 15mPa.s, add the inducer solution, react at room temperature for 2 hours, filter, wash, and dry in an inert atmosphere to form a stable eggshell-type Pt catalyst, Pt The loading amount was 1.0%. The thickness of the generated Pt shell is 15 μm, and the particle size of Pt is 3.6 nm. The prepared eggshell-type platinum catalyst was used in the ring-opening reaction of oxyfluorene hydrogenation, and the reaction conditions were: reaction temperature 400°C, reaction pressure 1MPa, hyd...

Embodiment 2

[0021] Example 2: Dissolve chloroplatinic acid and sodium formate in ethylene glycol respectively, and compare the influence of the molar ratio of sodium formate and chloroplatinic acid on the preparation of eggshell catalysts. The concentration of chloroplatinic acid is 0.01mol / L, the polyol solution of chloroplatinic acid is aged for 30 days, the concentration of sodium formate is 0.05, 0.1, 0.35 and 0.7mol / L, and the molar ratios of sodium formate and chloroplatinic acid are 5 and 10 respectively. , 35, 70, spherical or columnar carrier MgO / SiO 2 Add it into the chloroplatinic acid solution, control the immersion time to 60s, add the inducer solution, react at room temperature for 2 hours at normal pressure, filter, wash, and dry in an inert atmosphere to form a stable eggshell-type Pt catalyst with a Pt loading of 1.0%. The thickness of the generated Pt shells was 15 μm, and the particle sizes of Pt were 3.6nm, 3.5nm, 2.2nm and 2.0nm, respectively. According to the hydrog...

Embodiment 3

[0022] Embodiment 3: chloroplatinic acid and sodium acetate are dissolved in ethylene glycol respectively, the concentration of chloroplatinic acid is 0.01mol / L, the polyol solution aging of chloroplatinic acid is 30d, the concentration of sodium formate is 0.05mol / L, sodium formate The molar ratio of chloroplatinic acid and chloroplatinic acid is 5, spherical or columnar support MgO / SiO 2 、MgO / Al 2 o 3 , ZrO 2 / SiO 2 , ZrO 2 / Al 2 o 3 Add it into the chloroplatinic acid solution, control the immersion time to 60s, and the solution viscosity to 15mPa.s, add the inducer solution, react at room temperature for 2 hours, filter, wash, and dry in an inert atmosphere to form a stable eggshell-type Pt catalyst, Pt The loading amount was 1.0%. The thickness of the generated Pt shell was 15 μm, and the particle sizes of Pt were 3.6nm, 3.8nm, 3.9nm, and 3.3nm, respectively. The prepared eggshell-type platinum catalyst was used in the ring-opening reaction of oxyfluorene hydrogen...

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Abstract

The invention provides a preparation method of an eggshell-type noble metal catalyst and a method of using the same for dibenzofuran hydrogenation ring opening to prepare o-phenylphenol and belongs to the technical field of industrial catalysis. The preparation method includes: adding a carrier into a platinum metal salt solution; controlling deposition of platinum nanoparticles on the surface of the carrier through quick reductive reaction and solution viscosity; filtering, washing, and heating for drying in an inert atmosphere to form an eggshell-type platinum catalyst which is stable. The preparation method has the advantages of simple process, controllable structure and low process energy consumption; platinum particles in the eggshell-type platinum catalyst prepared by the method are uniformly distributed on the surface of the carrier, so that consumption of metal platinum is lowered, cost of the catalyst is lowered effectively, and the eggshell-type platinum catalyst has good industrial application prospect. The eggshell-type platinum catalyst presents excellent catalysis performance and long service life in reaction for dibenzofuran hydrogenation ring opening to prepare o-phenylphenol.

Description

technical field [0001] The invention belongs to the field of fine chemical synthesis, and relates to a method for preparing o-phenylphenol by hydrogenation and ring-opening of oxyfluorene. Background technique [0002] O-phenylphenol (OPP), as an important new type of fine chemical product and organic synthesis intermediate, is widely used in sterilization and anticorrosion, printing and dyeing auxiliaries and surfactants, and as a stabilizer and stabilizer for synthesizing new plastics, resins and polymer materials. Flame retardants, etc., and has a very broad development prospects. [0003] With the continuous development of the o-phenylphenol synthesis process towards clean, low-cost, and high-yield directions, the demand for o-phenylphenol in the international and domestic markets is increasing year by year, and the sales market is optimistic, which brings opportunities for the development of the OPP industry. The main source of oxyfluorene is the separation of washing ...

Claims

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Application Information

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IPC IPC(8): B01J23/42C07C37/00C07C39/15
CPCB01J23/42B01J23/58C07C37/00C07C39/15
Inventor 梁长海李闯相东张洁汪镭张新琪
Owner DALIAN UNIV OF TECH
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