Oxide catalyst for producing Alpha-Alpha-dimethylphenyl carbinol and preparation method thereof

A technology of dimethylbenzyl alcohol and oxide, applied in the field of oxide catalyst and preparation thereof, can solve problems such as affecting product quality, reducing yield, affecting separation process, etc., and achieves avoiding thermal decomposition, proper distribution of active sites and reaction low temperature effect

Active Publication Date: 2011-10-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation of DMPC is all prepared with CHP as a raw material. The method for producing organic alcohols with organic peroxides as a raw material mainly adopts the reduction method of an inorganic reducing agent, and the method [US 2484841-1949] using an Inorganic salts react with peroxides to generate a large amount of waste water and cheap inorganic salts, causing serious environmental pollution
The current production method mainly adopts this type, with Na 2 S or Na 2 SO 3 The aqueous solution of CHP is a reducing agent, and reacts with an equivalent amount of CHP at 80-100°C, the reaction time is 2-6 hours, the conversion rate of CHP is about 96%, and the selectivity of DMPC is about 95%; After separation and rectification, it still contains a certain amount of sulfur, which not only affects the quality of the product but also affects the subsequent separation process; because the reaction system contains a large amount of water, it causes the loss of CHP and DMPC, reducing the production rate. Rate

Method used

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  • Oxide catalyst for producing Alpha-Alpha-dimethylphenyl carbinol and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 126.4g KMnO respectively at room temperature 4 , 20.2g Fe(NO 3 ) 3 9H 2 O, 2.41gCu(NO 3 ) 2 , 8.76gCo(C 2 o 4 ) 2 2H 2 O, and the above compound was dissolved in 1.0L deionized water, then concentrated nitric acid was added to the above solution to adjust the pH to about 1.0, and 22.3g of Mn(NO 3 ) 2 and added to the above solution, and stirred, refluxed for 6 hours; then with concentrated HNO 3 Adjust the pH value of the reaction system to 8.0 with NaOH, transfer the resulting mixture to an autoclave, keep the temperature at 150°C for 48 hours, filter, wash and dry the product obtained after constant temperature, and then dry the dried product at 1mol / Soak in L of nitric acid for 1-8 hours, then filter and dry again; and bake at 400° C. for 4-24 hours in a nitrogen atmosphere to obtain the catalyst precursor I. The catalyst precursor I was mixed with alumina powder at a weight ratio of 10:1, an appropriate amount of nitric acid was added, and extruded...

Embodiment 2～10

[0023] Prepare the catalyst and evaluate the catalyst according to the various steps and conditions obtained in Example 1, but only change the synthesis conditions such as the type of raw materials, the ratio of raw materials, synthesis conditions, roasting conditions and catalyst molding factors, and list the synthesis conditions in Table 1; The catalysts obtained by different synthesis methods were evaluated under the same evaluation conditions, and the evaluation results are listed in Table 2.

[0024] Table 1

[0025]

name

Raw material type

Catalyst composition

resolve resolution

+Roasting conditions+Molding

Example 1

KMnO 4 +Fe(NO 3 ) 3 +Co(NO 3 ) 2

+Cu(NO 3 ) 2 +Mn(NO 3 ) 2

80% Manganese Oxide, 10% Iron Oxide,

0.1% copper oxide, 0.1% cobalt oxide,

0.8% sodium oxide, 9% aluminum oxide

pH=3.0,

Air+180℃+alumina

Example 2

...

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Abstract

The invention relates to an oxide catalyst for producing Alpha-Alpha-dimethylphenyl carbinol and a preparation method thereof, and mainly solves the technical problem that a product contents sulphur when sodium sulfide and sodium sulfite are used as reducers in the prior art. The oxide catalyst comprises the following components by weight percentage: 30-90% of manganese oxide, 0.1-10% of at leastone oxide out of copper, cobalt or iron, 0.1-10% of at least one oxide out of alkali metal oxides, and 5-60% of alumina carriers. The technical scheme for preparing the catalyst and a corresponding preparation method better solves the problem and can be applied to the industrial production of the Alpha-Alpha-dimethylphenyl carbinol.

Description

technical field [0001] The invention relates to an oxide catalyst for producing α,α-dimethylbenzyl alcohol and a preparation method thereof. Background technique [0002] α,α-Dimethylbenzyl alcohol (abbreviation: DMPC) is an important organic intermediate, which is mainly used in the preparation of dicumyl peroxide (abbreviation: DCP) by reacting with cumene hydroperoxide (abbreviation: CHP). ). At present, the preparation of DMPC is all prepared with CHP as a raw material. The method for producing organic alcohols with organic peroxides as a raw material mainly adopts the reduction method of an inorganic reducing agent, and the method [US 2484841-1949] using an Inorganic salts react with peroxides to generate a large amount of waste water and cheap inorganic salts, causing serious environmental pollution. The current production method mainly adopts this type, with Na 2 S or Na 2 SO 3 The aqueous solution of CHP is a reducing agent, and reacts with an equivalent amount ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889C07C33/20C07C29/132
Inventor 冯汝明刘仲能侯闽渤马静萌
Owner CHINA PETROLEUM & CHEM CORP
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