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Method of preparing 2-pentanone from ethanol

A technology of ethanol and pentanone, which is applied in the field of 2-pentanone preparation, can solve the problems of complex catalyst components and difficult regulation, and achieve the effect of easy operation and simple preparation method

Active Publication Date: 2017-03-08
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the process has complex catalyst components, which are difficult to control; the use of noble metals, and the catalytic reaction process needs to be carried out under a pressure of 1.0-5.0Mpa, etc.

Method used

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  • Method of preparing 2-pentanone from ethanol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Using cerium nitrate as the precursor of cerium and ammonia water as the precipitating agent, the catalyst was prepared by precipitation method, the specific process is as follows. Accurately formulated to contain 0.5mol·L -1 200mL of cerium nitrate solution, ammoniacal liquor (26wt%) was added dropwise in the cerium nitrate solution under vigorous stirring, and the pH of the solution was adjusted to 11. Wash and dry overnight. Catalyst 1 was then prepared by calcining (550° C., Air, 4 h), tableting, crushing, and sieving (40-60 mesh). Using Micromeritics ASAP2010 physical adsorption instrument to measure the specific surface area of ​​the sample, the nitrogen adsorption and desorption experiment shows that the specific surface area of ​​the material is 48m 2 g -1 .

Embodiment 2

[0024] Embodiment 2: The precursor of adjusting cerium is ammonium cerium nitrate, and the concentration of ammonium cerium nitrate is 2.0mol L -1 , the pH of the system was 10, the calcination temperature was 500° C., and other conditions were the same as in Example 1 to prepare catalyst 2. Nitrogen adsorption and desorption experiments show that the specific surface of the material is 39m 2 g -1 .

Embodiment 3

[0025] Embodiment 3: The precursor of adjusting cerium is cerium sulfate, and the concentration of cerium sulfate is 1.0mol L -1 Precipitating agent is potassium hydroxide, and other conditions are with example 1, make catalyst 3. Nitrogen adsorption and desorption experiments show that the specific surface of the material is 43m 2 g -1 .

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Abstract

The invention relates to a method of preparing 2-pentanone from ethanol. According to the method, CeO2 is taken as the catalyst, in a fixed bed reactor, in an inert gas atmosphere, ethanol is taken as the raw material, reactions are carried out at a temperature of 200 to 600 DEG C under a normal pressure; the liquid hourly space velocity (LHSV) of the reactions is 0.1-6.0 g<cat><-1>h<-1>, and the gas space velocity of the reactions is 2000 to 8000 mL.g<cat><-1>h<-1>. The method can efficiently convert cheap ethanol into 2-pentanone in one step. The ethanol conversion rate can reach 92.8%. The selectivity of 2-pentanone is 36.8%. Moreover, the used catalyst raw materials are cheap and easily-available, the preparation method is simple, a normal pressure reaction technology is adopted, the operation is easy, and the method can be applied to the industrial application.

Description

technical field [0001] The invention belongs to the field of 2-pentanone preparation, and in particular relates to a method for preparing 2-pentanone from ethanol. Background technique [0002] 2-Pentanone is an important organic chemical raw material, which is widely used as an intermediate in organic synthesis and pharmaceutical synthesis, and can be used to synthesize the vasodilator drug Virga. 2-Pentanone is also an excellent organic solvent, which can be used as an excellent dewaxing agent for lubricating oil, as well as a solvent for nitro spray paint and synthetic resin coating, and can also be used as an extractant. The traditional method for synthesizing 2-pentanone is to prepare 2-pentanol by oxidative dehydrogenation or by co-heating ethyl butyroacetate and water. In the production process of these methods, a large amount of organic solvents and inorganic substances will be used, and a large amount of three wastes will be generated, which not only increases the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C45/00C07C49/04
CPCC07C45/00C07C49/04
Inventor 王峰李利花徐杰李书双张志鑫王业红张超锋张健
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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