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Process for catalytic decomposition of cyclohexane hydroperoxide

A cyclohexane hydrogen peroxide, catalytic decomposition technology, applied in chemical instruments and methods, preparation of oxygen-containing compounds, organic chemistry, etc.

Inactive Publication Date: 2007-01-24
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] There is no report on the use of pure molecular sieves without transition metals or noble metals to decompose cyclohexane hydroperoxide

Method used

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  • Process for catalytic decomposition of cyclohexane hydroperoxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 0.1 g of silicon-aluminum molar ratio to a 50 ml stainless steel reactor with electromagnetic stirring according to SiO 2 / Al 2 O 3 Count as 11.5, Na 2 O content is 0.1%, industrial hydrogen type β molecular sieve. Then 10 grams of cyclohexane solution containing 2.1% cyclohexane hydrogen peroxide was added. After replacing the reactor with nitrogen first, close the gas inlet and outlet valves, heat it up to 85°C while stirring, continue the constant temperature reaction for 20 minutes and then lower the temperature, and take out the reaction product.

[0023] The content of cyclohexane hydrogen peroxide before and after the reaction was analyzed by the iodine-sodium thiosulfate redox titration method, and the content of cyclohexanol and cyclohexanone in the reaction solution and the product solution before and after the reaction was analyzed by the internal standard method of gas chromatography.

[0024] The conversion rate of cyclohexane hydrogen peroxide (CNNP) is ca...

Embodiment 2

[0028] Use the molar ratio of silicon to aluminum according to SiO 2 / Al 2 O 3 Count as 25, Na 2 0.1 g of industrial hydrogen type β molecular sieve with an O content of 0.075% was repeated in Example 1, and the results are listed in Table 2.

Embodiment 3

[0030] Use the molar ratio of silicon to aluminum according to SiO 2 / Al 2 O 3 Count as 25, Na 2 0.1 g of industrial hydrogen type β molecular sieve with an O content of 0.045%, the experiment of Example 1 was repeated, and the results are also listed in Table 2.

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Abstract

The present invention is the catalytic decomposition process of cyclohexane hydrogen peroxide, and in liquid phase condition with beta-type molecular sieve as catalyst, cyclohexane hydrogen peroxide is converted into cyclohexano and cyclohexanone. Catalyst in the amount of 0.05-5 wt% of reactant solution and the cyclohexane solution of cyclohexane hydrogen peroxide are made to react under stirring in 50-1500 rpm, heating to 50-150 deg.c and maintaining for 0.1-5 hr before the reacted product is taken out. Compared with available catalytic decomposition process of cyclohexane hydrogen peroxide with supported noble metal or transition metal catalyst, the present invention has the features of cheap catalyst, easy use, etc.

Description

Technical field [0001] The invention relates to a cyclohexane solution containing cyclohexane hydrogen peroxide, and a method for converting the cyclohexane hydrogen peroxide into cyclohexanol and cyclohexanone under the catalysis of a β-type molecular sieve. technical background [0002] The decomposition reaction of cyclohexane and hydrogen peroxide is one of the important steps in the process of cyclohexane oxidation to produce cyclohexanol and cyclohexanone. [0003] The decomposition reaction can be expressed by the chemical reaction formula as follows: [0004] [0005] The existing industrial method uses a large amount of sodium hydroxide lye containing cobalt ions to decompose cyclohexane hydrogen peroxide. This method has the disadvantages of high cost, large amount of alkaline waste water which pollutes the environment, corrosion of equipment and low yield. The use of environmentally friendly solid catalysts to replace traditional liquid caustic soda to decompose cycl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C27/00C07C31/135C07C49/403
Inventor 孙志强徐杰张伟
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI