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A kind of supported catalyst and its preparation method and application

A supported catalyst and catalyst technology, applied in chemical instruments and methods, preparation of organic compounds, preparation of amino hydroxyl compounds, etc., to achieve the effects of many times of application, effective degradation, and good stability of the catalyst

Active Publication Date: 2019-03-08
ZHEJIANG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this catalyst is only suitable for the treatment of chlorophenol compounds in low concentration (1000-2000mg / L) aqueous solution, and the phenol content in its degradation product also has about 15-40%

Method used

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  • A kind of supported catalyst and its preparation method and application
  • A kind of supported catalyst and its preparation method and application
  • A kind of supported catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 Embodiment 10

[0052] The content, proportion and preparation conditions of the catalyst active components are provided, as shown in Table 1. The specific preparation process of the catalyst is as follows: 4.0-12.0%: 0.2-3.5%: 0.2-3.5% of the carrier mass are respectively weighed soluble palladium salt (see Table 1), lanthanum nitrate and cerium nitrate according to the metal mass content percentage, configured as The aqueous solution having the same volume as the total pore volume of the activated carbon (see Table 1 for details) was placed in a constant pressure funnel and inserted into a three-necked flask. Then dry the activated carbon in the three-necked flask for 1.5-4.0 hours in a vacuum state of -0.08--0.1MPa and 120.0-180.0°C. After drying, lower the temperature to 5.0-80.0°C, open the valve of the constant pressure funnel, and fully wet the aqueous solution containing palladium, lanthanum and cerium with the activated carbon. Then in a vacuum anaerobic state (between -0.08—-0.1MPa...

Embodiment 10

[0056] Table 3 shows the application of the catalyst prepared in Example 10 to the catalytic conversion of hexachlorobenzene to prepare phenetole.

[0057] The specific hydrogenation conversion process is as follows: put hexachlorobenzene, ethanol, and catalyst in a ratio of 100g:600ml:1.0g, and the molar ratio of chlorine atoms contained in sodium hydroxide to hexachlorobenzene is 1.5, and put into a 500ml high-pressure hydrogenation reactor Inside, the feeding volume is 70%. Close the reactor, replace the air in the reactor with nitrogen, then replace the nitrogen with hydrogen, start stirring, maintain the reaction temperature at about 90-110°C, and the hydrogen pressure between 0.5-1.2MPa, until no hydrogen is absorbed, stop the reaction, filter catalyst. Sodium chloride is precipitated by low-temperature evaporation, and ethanol and sodium hydroxide are recovered for reuse. The filtrate was analyzed by gas chromatography.

[0058]

[0059]

[0060] Table 3. Catal...

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Abstract

The invention discloses a supported catalyst and its preparation method and application. The catalyst is composed of a carrier and an active component loaded on the carrier. The carrier is activated carbon, and the active component is composed of palladium, lanthanum, cerium and Boron composition, the masses of palladium, lanthanum, cerium and boron are respectively 3.0-15.0%, 0.1-5.0%, 0.1-5.0% and 0.1-2.5% of the carrier mass. The present invention provides the use of the supported catalyst in the reaction of chlorobenzene compounds represented by formula (I) and alcohols represented by formula (II) to produce phenyl ether compounds represented by formula (III). The catalyst prepared by the invention has good catalytic performance for chlorobenzene compounds, the catalytic conversion rate can reach 100%, the selectivity is more than 99%, and the catalyst is stable. It can not only achieve effective degradation of chlorobenzene compounds; Phenyl ether organic compounds with more application value can be obtained.

Description

(1) Technical field [0001] The invention relates to a supported catalyst, its preparation method and its application in catalytic hydrogenation conversion of chlorobenzene compounds into phenyl ether compounds. (2) Technical background [0002] Chlorobenzene is an important class of industrial raw materials. It is widely used in various fields such as chemical industry, medicine, pesticide, dyestuff, etc. as organic synthesis raw material and fine chemical intermediate. However, such compounds usually have residual, bioaccumulative, low volatility and high toxicity (carcinogenic, teratogenic, mutagenic), and are not easy to be decomposed or naturally degraded, and long-term accumulation in the environment will affect the ecological environment and human health. pose a serious threat. Therefore, how to degrade chlorobenzene and carry out its non-toxic and harmless treatment has become an important research topic that needs to be solved urgently in the field of environmental ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/63C07C41/16C07C43/205C07C43/225C07C201/12C07C205/37C07C213/00C07C217/84
CPCC07C41/16C07C43/205C07C43/225C07C201/12C07C205/37C07C213/00C07C217/84B01J23/63B01J35/617B01J35/635
Inventor 卢春山周强李小年马利勇王树华
Owner ZHEJIANG UNIV OF TECH
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