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Used in the preparation of quinone and p-benzoquinone in sio 2 Catalyst loaded with cuo and preparation method thereof

A p-benzoquinone and catalyst technology, applied in the field of CuO/SiO2 catalyst preparation, can solve the problems of low conversion rate of raw materials, many side reactions, expensive raw materials, etc., and achieve high catalytic activity, simple preparation method, and easy recovery.

Active Publication Date: 2016-09-07
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In addition, the traditional preparation methods of hydroquinone include: p-dicumene peroxidation method, aniline oxidation method, o-chlorophenol hydrolysis method, etc., because these traditional preparation methods have large pollution, expensive raw materials, low raw material conversion rate, side effects Features such as multiple responses are gradually eliminated

Method used

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  • Used in the preparation of quinone and p-benzoquinone in sio <sub>2</sub> Catalyst loaded with cuo and preparation method thereof
  • Used in the preparation of quinone and p-benzoquinone in sio <sub>2</sub> Catalyst loaded with cuo and preparation method thereof
  • Used in the preparation of quinone and p-benzoquinone in sio <sub>2</sub> Catalyst loaded with cuo and preparation method thereof

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Embodiment 1

[0032] Weigh about 0.524g of copper acetylacetonate (Cu(acac) 2 ) was placed in a sublimator in a chemical vapor deposition device, and 2.0 g of nanoscale SiO 2 The particles are placed in the fluidized bed reactor, the chemical vapor deposition device is turned on, the vacuum degree is adjusted to 0.08MPa, and N 2 The carrier gas was 80 mL / min, the temperature of the fluidized bed reactor was adjusted to 200 °C, and the SiO 2 After the particles were dried for 2 hours, air was introduced into the sublimator at a flow rate of 80-100 standard ml / min, the temperature of the sublimator was adjusted to 190 °C, and the fluidized bed reactor was re-adjusted to 260 °C. ) 2 After the complete sublimation, the temperature of the fluidized bed reactor was maintained for 2h, and the vapor deposition device was closed, so that the CuO / SiO 2 (1 mmol / g) catalyst preparation was completed.

Embodiment 2

[0036] Weigh about 0.263g of copper acetylacetonate (Cu(acac) 2 ) was placed in a sublimator in a chemical vapor deposition device, and 2.0 g of nanoscale SiO 2 The particles were placed in the fluidized bed reactor, the chemical vapor deposition device was turned on, the vacuum degree was adjusted to 0.08MPa, and N 2 The carrier gas was 80 mL / min, the temperature of the fluidized bed reactor was adjusted to 200 °C, and the SiO 2 After the particles were dried for 2 hours, air was introduced into the sublimator at a flow rate of 80-100 standard ml / min, the temperature of the sublimator was adjusted to 190 °C, and the fluidized bed reactor was re-adjusted to 300 °C. ) 2 After the complete sublimation, the temperature of the fluidized bed reactor was maintained for 2h, and the vapor deposition device was closed, so that the CuO / SiO 2 (0.5 mmol / g) catalyst preparation was completed.

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Abstract

The invention discloses a CuO-loaded SiO2 catalyst applied to preparation of benzenediol and benzoquinone and a preparation method of the catalyst and relates to the technical field of production of chemical raw materials and intermediates. The preparation method of the catalyst comprises the following steps: adding copper acetylacetonate into a sublimator of a chemical vapor deposition device by a chemical vapor deposition method, adding SiO2 into a fluidized bed reactor, introducing carrier gas N2, fluidizing SiO2 under the vacuum pumping condition, reacting and ending, drying SiO2, introducing air into the sublimator, heating the sublimator and sublimating the copper acetylacetonate, regulating the temperature of the fluidized bed reactor, depositing the copper acetylacetonate on SiO2 and simultaneously decomposing and oxidizing copper acetylacetonate into CuO. The catalyst prepared by the method has the characteristics of large specific surface, small nano CuO particles and uniform load of CuO on a carrier SiO2; the high dispersion of CuO on SiO2 has an important influence for preparing benzenediol and benzoquinone by virtue of oxidization of phenol.

Description

technical field [0001] The invention relates to the technical field of production of chemical raw materials and intermediates, in particular to CuO / SiO used for phenol oxidation to prepare diphenol and p-benzoquinone 2 Method for making catalysts. Background technique [0002] Catechol (CAT), hydroquinone (HQ) and para-benzoquinone (BQ) are important chemical raw materials and intermediate products with wide application fields. It can also be used to prepare spices, dyes, photosensitive materials, electroplating materials, special inks, antioxidants, fungicides, light stabilizers, preservatives and accelerators; hydroquinone is mainly used in Anthraquinone dyes, azo dyes, auxiliary solvents for synthetic ammonia desulfurization process, polymerization inhibitors, stabilizers for paint varnishes and gasoline antioxidants, etc. P-benzoquinone is used in the synthesis of intermediates in dyes, flame retardants, pharmaceuticals, rubber antioxidants and other industries. Since...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/72C07C37/60C07C39/08C07C46/06C07C50/04
Inventor 石国军陈宾宾
Owner YANGZHOU UNIV