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Preparation method for preparing biphenyl and o-phenylphenol by hydrofining industrial dibenzofuran

A technology for o-phenylphenol and industrial oxyfluorene is applied in the field of industrial oxyfluorene hydrorefining to prepare biphenyl and o-phenylphenol, and can solve the problems of tediousness, many process steps and the like, and achieves simple operation, ultra-high selectivity, high The effect of good economic benefits and industrial application prospects

Active Publication Date: 2017-03-15
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of active metal sodium requires many process steps, which is relatively cumbersome and has certain risks.

Method used

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  • Preparation method for preparing biphenyl and o-phenylphenol by hydrofining industrial dibenzofuran
  • Preparation method for preparing biphenyl and o-phenylphenol by hydrofining industrial dibenzofuran
  • Preparation method for preparing biphenyl and o-phenylphenol by hydrofining industrial dibenzofuran

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Experimental program
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Effect test

Embodiment 1

[0014] Example 1: The supported CoMo catalyst is prepared by co-precipitation method, and its carrier is SiO 2 、Al 2 o 3 、TiO 2 , SiO 2 -Al 2 o 3 or Al 2 o 3 -TiO 2 , the specific preparation process is: dissolving cobalt nitrate and ammonium molybdate respectively, then adding a complexing agent to the cobalt nitrate solvent, slowly adding ammonium molybdate to form a complex between Co and Mo, adding the carrier to the metal complex Add a precipitating agent to the solution, and the precipitated solid is dried at 180°C. After drying, it is molded and calcined, and the hydrogenation refining catalyst is prepared by reduction. The reduction procedure is: reduce 50ml of catalyst, the hydrogen concentration is 85%, the hydrogen flow rate is 2000ml / min, and the temperature rises The rate is 2°C / min, the temperature is kept at 420°C for 8h, the temperature is naturally lowered, and passivated for later use. Catalysts with different loads can be prepared by changing the ca...

Embodiment 2

[0015] Embodiment 2: On the basis of embodiment 1, prepare 6Co16Mo / SiO 2 、6Co16Mo / Al 2 o 3 、6Co16Mo / TiO 2 、6Co16Mo / SiO 2 -Al 2 o 3 and 6Co16Mo / Al 2 o 3 -TiO 2 catalyst.

Embodiment 3

[0016] Embodiment 3: On the basis of embodiment 1, prepare 6Co16Mo / SiO 2 , the loading amount of metal Co was 6%, and the loading amount of metal Mo was 16%.

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Abstract

The invention provides a preparation method for preparing biphenyl and o-phenylphenol by hydrofining industrial dibenzofuran, and belongs to the field of fine chemical synthesis. The industrial dibenzofuran is dissolved in a dissolving kettle by a solvent, a dissolving temperature is 80-100 DEG C, and the industrial dibenzofuran organic solution after dissolving is injected into a fixed bed reactor loaded with a hydrofining catalyst and undergoes a hydrofining reaction; after the hydrofining reaction, the product directly enters a rectifying tower and is rectified, and cyclohexane and benzene come out of a tower top; according to the boiling point, an extracted solvent is circulated for re-dissolving the industrial dibenzofuran, the extracted biphenyl is directly granulated as a product, the extracted o-phenylphenol is directly granulated as a product, and refined dibenzofuran is extracted from a tower bottom; and the refined dibenzofuran as a raw material is used for production of o-phenylphenol. The biphenyl and the o-phenylphenol with high additional value are produced by the industrial dibenzofuran; the used catalyst has super high selectivity and relatively high hydrogenation activity. The method has good economic benefits and industrial application prospects.

Description

technical field [0001] The invention belongs to the field of fine chemical synthesis, and relates to a method for preparing biphenyl and o-phenylphenol by hydrogenation and refining of industrial fluorene. Background technique [0002] Biphenyl (BP) is an important organic raw material, which is widely used in medicine, pesticides, dyes, liquid crystal materials and other fields. It can be used to synthesize plasticizers and preservatives, and can also be used to make fuels, engineering plastics and high-energy fuels. Biphenyl is present in coal tar, crude oil and natural gas. The preparation methods of biphenyl include chemical synthesis of biphenyl by benzene pyrolysis and separation and extraction of biphenyl by various coal tar fractions. The mass fraction of biphenyl in coal tar is 0.20%-0.40%. At present, coal tar extraction method and chemical synthesis method coexist. O-phenylphenol (OPP), as an important new type of fine chemical product and organic synthesis int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C37/055C07C39/15C07C13/28C07C1/20C07C15/14
CPCC07C1/20C07C37/055C07C39/15C07C13/28C07C15/14
Inventor 梁长海李闯齐骥张洁邸鑫殷东东
Owner DALIAN UNIV OF TECH
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