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Catalyst oxdie cyclohexane process

A catalytic oxidation and process technology, which is applied in the direction of oxidation reaction preparation, oxidation preparation of carbonyl compounds, hydrocarbon oxidation preparation of oxygenated compounds, etc., can solve the problems of difficult application in industrialization, difficulty in waste lye treatment, long process route, etc., and achieve reduction Production cost, load reduction, and the effect of reducing capacity expansion

Inactive Publication Date: 2006-03-29
CHINA PETROLEUM & CHEM CORP
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Problems solved by technology

But there are obvious deficiencies: such as longer process route, high material consumption, and large pollution; especially, it is difficult to treat a large amount of waste lye produced in the decomposition process of cyclohexyl hydroperoxide
Since 1979, Groves et al. proposed the iodosophenone-metalloporphyrin-cyclohexane simulation system, which realized the artificial simulation reaction of cytochrome P-450 monooxygenase for the first time, and people synthesized many types of metalloporphyrins. Phyline catalyzes the oxidation of cyclohexane to cyclohexanol, but it is generally limited to simulated life conditions (normal temperature, normal pressure), and its research results are difficult to apply to industrialization.

Method used

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  • Catalyst oxdie cyclohexane process

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Effect test

Embodiment 1

[0020] Example 1 in three 0.4M 3 In the oxidation reactor, the process flow chart is attachedfigure 1 , the oxidation reactor is three reactors connected in series with mechanical stirring, and the feeding amount of cyclohexane is kept at 1M 3 / hour, under the catalysis of metalloporphyrin, air is added from the bottom of the reactor, the reaction pressure is 0.9Mpa, and the cyclohexane carried by the oxidation tail gas is recovered by condensation and returned to the reactor. The oxidation product was cooled to 85°C and fed into a 0.4M 3 In the reaction kettle with mechanical stirring, the organic matter is mixed with the alkali, and the alkalinity is controlled at 1.0mg / meq. The acid in the organic matter reacts with the alkali to form organic acid sodium salt, and the ester organic matter is decomposed into organic acid and alcohol organic matter. The reactor The temperature is controlled at 90°C. ℃, the pressure is controlled at 0.3MPa, and the inorganic substances in t...

Embodiment 2

[0022] Embodiment 2 In a 80L bubble column reactor, the feeding amount of cyclohexane keeps 100L / per hour, and under the action of the catalyst, air is added from the bottom of the reactor, and the air oxidizes cyclohexane at a pressure of 0.9MPa, and the oxidation The cyclohexane carried by the tail gas is recovered by condensation and returned to the reactor.

[0023] serial number

Embodiment 3

[0024] Embodiment 3 In a 100L tubular reactor, the feeding rate of cyclohexane is maintained at 100L / hour, and the content of tetraphenylporphyrin cobalt catalyst in cyclohexane is 2.5mg / l, and air is added from the bottom of the reactor Under the action of the catalyst, air oxidizes cyclohexane at 148°C and 0.9MPa pressure, and the molar conversion rate of cyclohexane is 6.8%; the cyclohexane carried by the oxidation tail gas is recovered by condensation and returned to the reactor. The selectivity of cyclohexanol, cyclohexanone and cyclohexyl hydroperoxide among the oxidation products was 92%, of which cyclohexyl hydroperoxide accounted for 20%.

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Abstract

A process for preparing cyclohexanol, cyclohexanone and adipic acid by catalytic oxidization of cyclohexane under existance of metallic porphyrin catalyst and a certain temp and pressure through combination of different reactors is disclosed. Its advantages are high single-pass conversion rate of cyclohexane and total output rate, low energy consumption and cost, and no need of cyclohexanol or acetone solvent and cocatalyst.

Description

field of invention [0001] The invention relates to the process route of producing cyclohexanol and cyclohexanone by air oxidation of cyclohexane under the catalysis of metalloporphyrin, and the process route of producing cyclohexanol, cyclohexanone and adipic acid by air oxidation of cyclohexane. Background of the invention [0002] The industrial production processes of cyclohexanone in the world mainly include (1) phenol hydrogenation method, (2) cyclohexane liquid phase oxidation method, and (3) cyclohexene hydration method. At present, more than 90% of cyclohexanone is produced by cyclohexane oxidation. There are three main methods of direct oxidation of cyclohexane that have formed industrial technology: non-catalytic oxidation, boric acid catalytic oxidation and homogeneous oxidation of soluble metal salt catalyst. [0003] (1) Non-catalytic oxidation method [0004] This method is one of the main process technologies currently used. Use air (oxygen) to oxidize cycl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C27/12C07C31/135C07C49/403C07C29/50C07C45/28C07C31/26C07C55/14C07C409/16
Inventor 肖俊钦李皓刘小秦
Owner CHINA PETROLEUM & CHEM CORP
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