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Catalyst composition and preparation method thereof, and method for preparing o-phenylphenol by using catalyst composition

A composition and catalyst technology, which is applied in the preparation of organic compounds, chemical instruments and methods, catalysts for physical/chemical processes, etc., can solve problems such as unindustrialization, and achieve large-scale industrial production, easy availability of materials, and stable performance. Effect

Active Publication Date: 2015-08-19
BEIJING RISUN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the immature technology, this process route has not yet been industrialized

Method used

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  • Catalyst composition and preparation method thereof, and method for preparing o-phenylphenol by using catalyst composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Pre-prepared catalyst support γ-Al 2 o 3 : Sieve a certain amount of 40-60 mesh active Al 2 o 3 Granules were calcined in a muffle furnace at 550°C for 4 hours to obtain γ-Al 2 o 3 .

[0040] Preparation of Pt / γ-Al by Equal Volume Impregnation 2 o 3 Catalyst: First prepare an aqueous solution of chloroplatinic acid, dissolve 1.0 g of solid chloroplatinic acid with deionized water, set the volume in a 25 ml brown volumetric flask, and refrigerate for later use. Weigh 10g γ-Al 2 o 3 For the carrier, measure 13 ml of chloroplatinic acid aqueous solution (calculated based on the measured saturated water absorption of 1.3 ml / g) containing Pt element as an equivalent of 2% of the mass of the carrier as the impregnating solution. Add impregnation droplet to γ-Al 2 o 3 Carrier, soak overnight at room temperature.

[0041] Catalyst calcination and active material reduction: The impregnated catalyst was calcined in a muffle furnace at 450°C for 4 hours to obtain the f...

Embodiment 2

[0046] The selected carrier is θ-Al 2 o 3 , the preparation process is consistent with that of Example 1, except that the calcination temperature is different, which is 950° C. for 4 hours.

[0047] The catalyst also adopts the same volume impregnation method to load the active components, except for the specific content, the impregnation process is the same as that of Example 1.

[0048] Catalyst finalization adopts roasting method, is consistent with embodiment 1, finally makes 2%Pt / θ-Al 2 o 3 catalyst composition.

[0049] The evaluation experiment adopted the same evaluation method and conditions as in Example 1, and the results were obtained: the average conversion rate of DBF was 82.42%, and the average selectivity of OPP was 48.39%. The main by-products are still dicyclohexyl, cyclohexylbenzene, biphenyl and 1,2,3,4-tetrahydrodibenzofuran, but the content of by-products is lower than that in Example 1. In addition to by-products, a small amount of 2-cyclohexylpheno...

Embodiment 3

[0051] Also use θ-Al 2 o 3 As a catalyst carrier, the preparation process is consistent with Example 2.

[0052] The active component of the catalyst is metal Pd, and the same volume impregnation method is used to support metal Pd equivalent to 2% equivalent of the carrier mass. The impregnation process is the same as in Example 2 except that palladium chloride is dissolved in concentrated hydrochloric acid and the specific content is different.

[0053] Catalyst finalization adopts roasting method, is consistent with embodiment 1, makes 2%Pd / θ-Al 2 o 3 catalyst composition.

[0054] Evaluation experiment:

[0055] The evaluation experiment adopts the same evaluation method as that of Example 1, except that the reduction condition is 300° C. and 80 ml / min of hydrogen flow for 3 hours, and other conditions are the same as that of Example 1.

[0056] Using the same evaluation method as in Example 1, the results obtained showed that the average conversion rate of DBF was 71....

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Abstract

The invention discloses a catalyst composition for catalyzing dibenzofuran for hydrogenation preparation of o-phenylphenol and a preparation method thereof, and a method for catalyzing dibenzofuran for hydrogenation preparation of o-phenylphenol by using the catalyst composition; the catalyst composition includes a hydrogenation catalyst active component and a carrier part, wherein an active substance in the catalyst active component is Pt or Pd; the carrier part is a solid carrier, and the solid carrier is selected from gamma-Al2O3, theta-Al2O3, SiO2 or activated carbon. The metal Pt or Pd having good catalytic performance on a hydrogenation reaction is subjected to preparation combination with the carrier such as gamma-Al2O3, theta-Al2O3, SiO2 or activated carbon, and the catalyst composition is applied in the reaction of catalyzing dibenzofuran for hydrogenation preparation of o-phenylphenol, and has better catalytic performance aiming at the reaction of dibenzofuran hydrogenation preparation of o-phenylphenol.

Description

technical field [0001] The present invention relates to the field of synthesis of phenylphenol compounds in organic chemical industry, in particular to a catalyst composition for catalyzing the hydrogenation of dibenzofuran (oxyfluorene) to prepare o-phenylphenol, its preparation method and the use of the catalyst composition A method for preparing o-phenylphenol by catalyzing the hydrogenation of dibenzofuran. Background technique [0002] Ortho-phenylphenol, also known as 2-hydroxybiphenyl, is abbreviated as OPP (o-phenylphenol). As an important new fine chemical product and organic synthesis intermediate, o-phenylphenol is widely used in many fields (including sterilization and decorrosion, printing and dyeing auxiliaries and surfactants, synthesis of new plastics, resins and stabilization of polymer materials agent and flame retardant, etc.), and has a very broad development prospects. In addition, o-phenylphenol and its sodium salt have been widely used in the storage...

Claims

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Application Information

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IPC IPC(8): B01J23/42B01J23/44C07C37/055C07C39/15
Inventor 张英伟刘皓王耀红陈文月张绍岩
Owner BEIJING RISUN TECH CO LTD
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