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Recycling method for catalyst alumina

A recovery method and technology for alumina, applied in chemical recovery, aluminate/alumina/aluminum hydroxide purification, etc., to achieve the effects of low cost, short treatment time and simple treatment process

Active Publication Date: 2014-04-16
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The separation and purification of alumina has been studied at home and abroad, but there is no relevant report on the separation and purification of the catalyst alumina required for the recovery and synthesis of cyclohexanone dimer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Step 1: Add 25g of raw materials containing catalyst alumina and 100mL of ethanol solution into a reaction kettle equipped with a stirrer, reflux condenser and thermometer, start stirring, adjust the heating voltage between 150 and 200V, and react for 0.5 after the temperature is constant. hours, the solid phase material is extracted after the reaction, and the liquid phase material is collected to be recycled;

[0016] Step 2: Put the solid phase material into the reaction kettle, add 100g of sodium hydroxide, ethanol and water mixture, wherein the mass fraction of sodium hydroxide is 5%, start stirring, keep the temperature in the reaction kettle at 85°C, heat After reacting for 0.5 hours, the solid phase material was extracted again, the solid phase material was washed twice, and the liquid phase material was collected for recycling;

[0017] Step 3: The solid-phase material obtained in Step 2 is repeatedly treated once according to the method of Step 2 to obtain a c...

Embodiment 2

[0019] The difference from Example 1 is that the catalyst alumina raw material added in step 1 is 28g, and the product purity is measured by roasting method, and the purity reaches 96.2%.

Embodiment 3

[0021] The difference from Example 1 is that the catalyst alumina raw material added in step 1 is 33g, and the product purity is measured by roasting method, and the purity reaches 96.1%.

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Abstract

The invention discloses a recycling method for catalyst alumina. The recycling method comprises the following steps: firstly, adding ethanol to a material containing the catalyst alumina to carry out organic extraction, primarily removing organic-phase impurities; then, adding a mixed solution of sodium hydroxide, ethanol and water to the obtained solid-phase material for carrying out reaction with an alkali solution; and finally, extracting the solid-phase material, water-washing the extracted solid-phase material twice for further removing the impurities to obtain the alumina product. The recycling method has a simple treatment process, low cost, short treatment time, efficiency and environmental protection, so that the purity after the treatment reaches more than 96%, and the market requirements are satisfied.

Description

technical field [0001] The invention belongs to the field of recovery of catalysts, in particular to the field of recovery methods of catalyst alumina. Background technique [0002] Cyclohexanone self-condensation product 2-(1-cyclohexenyl) cyclohexanone and 2-cyclohexylene alkyl cyclohexanone (collectively referred to as cyclohexanone dimer) can be used as carbamate herbicides Solvent is also a key intermediate for the preparation of o-phenylphenol (OPP). OPP is an important fine chemical product that can be used to synthesize bactericidal preservatives, surfactants, printing and dyeing auxiliaries, plastic heat stabilizers and new flame retardants , the application is very wide, the demand is large, and the supply of this product has been in short supply, which is of great significance to the research and development of OPP synthesis intermediates. [0003] Cyclohexanone self-condensation reaction can occur under acid and alkali conditions, Al 2 o 3 With porosity, high ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/46
CPCY02P20/584
Inventor 高军宋春凤程君霞崔佳惠张颖赵丽雯李慧敏张连正
Owner SHANDONG UNIV OF SCI & TECH