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Method for producing Alpha, Alpha-dimethyl phenyl carbinol

A technology of dimethyl benzyl alcohol and cumene hydroperoxide, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve problems such as pollution, sulfur-containing environment of products, and reduce decomposition temperature , high catalytic activity, good redox 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

[0003] The technical problem to be solved by the present invention is that when sodium sulfide and sodium sulfite solution are used as reducing agent in the prior art, it will cause sulfur in the product and cause environmental pollution. A new method for producing α, α-dimethylbenzyl alcohol method

Method used

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  • Method for producing Alpha, Alpha-dimethyl phenyl carbinol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] 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 above-mentioned compound is dissolved in 1.0L deionized water, then in above-mentioned solution, add concentrated nitric acid, adjust pH to about 1.0, weigh the MnSO of 22.3g simultaneously 4 4H 2 O 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. Mix catalyst precursor I and alumina powder according to the weight ratio of 4:1, add an appropriate amount of nitric a...

Embodiment 2～10

[0013] 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.

Embodiment 11～20

[0015] Prepare the catalyst and evaluate the catalyst according to the various steps and conditions of Example 1, but change the evaluation parameters such as the concentration of cumene hydroperoxide, reaction temperature, system pressure, liquid phase space velocity and solvent, and list the evaluation results in the table 3 in.

[0016] Table 1

[0017] name

Raw material type

Catalyst composition

Synthesis method + 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

K 2 MnO 4 +Fe(NO 3 ) 3 +Co(C 2 o 4 ) 2 +Cu(NO 3 ) 2 +Mn(NO 3 ) 2

80% manganese oxide, 1% iron oxide, 1% copper oxide, 1% cobalt oxide, 2% sodium oxide, 15% aluminum oxide

pH=1.0, air+240℃+aluminum sol

Example 3

...

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Abstract

The invention relates to a method for producing Alpha, Alpha-dimethyl phenyl carbinol, and provides a new technology for producing Alpha, Alpha-dimethyl phenyl carbinol by conducting multi-phase catalytic decomposition to cumene hydroperoxide. In the method, the cumene hydroperoxide is adopted as the material; in a reaction system, the weight concentration of the cumene hydroperoxide is 1-60 percent, under the conditions that the reaction temperature is 30-100 DEG C, the system pressure is 0.01-1.0MPa and the liquid phase airspeed is 0.5-8hr to 1, the material contacts and reacts with a catalyst to produce the Alpha, Alpha-dimethyl phenyl carbinol, wherein the catalyst comprises the following components by weight percentage: 30-90 percent of manganese oxides, 0.1-10 percent of at least one of copper oxide, cobalt oxide or ferric oxide, 0.1-10 percent of at least one oxide selected from alkali metal oxides, and 5-60 percent of alumina support. The technical scheme can better solve the problems and can be applied to the industrial production of the Alpha, Alpha-dimethyl phenyl carbinol.

Description

technical field [0001] The present invention relates to a method for producing α,α-dimethylbenzyl alcohol. 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, DMPC is prepared from CHP as a raw material. And take organic peroxide as the method of raw material production organic alcohol mainly contains four kinds, the first kind is the reduction method of inorganic reductant, uses the method [US 2484841-1949] of inorganic reductant with equivalent inorganic salt and peroxide reaction, generating a large amount of waste water and cheap inorganic acid salts, causing serious environmental pollution, this method has been a backward technology that tends to be eliminated; the second is the strong alkali method to decompose peroxides [JP 58162539-1983; US 4825007 -...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C33/20C07C29/48C07C29/00B01J23/889
Inventor 冯汝明刘仲能王德举李学礼
Owner CHINA PETROLEUM & CHEM CORP
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