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A kind of method for preparing 2-pentanone from ethanol

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

Active Publication Date: 2019-02-15
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

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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  • A kind of method for preparing 2-pentanone from ethanol

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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 ASAP 2010 physical adsorption instrument to measure the specific surface area of ​​the sample, the nitrogen adsorption and desorption experiment shows that the specific surface 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 for preparing 2-pentanone from ethanol. The method uses CeO2 as a catalyst. The specific process is to use ethanol as a raw material in a fixed-bed reactor under an inert atmosphere, and the reaction temperature is 200-600° C. under normal pressure. , the hourly space velocity of the reaction solution is 0.1 to 6.0 gcat‑1h‑1, and the reaction gas space velocity is 2000 to 8000 mL·gcat‑1h‑1. The process can efficiently convert cheap ethanol into 2-pentanone in one step, wherein the conversion rate of ethanol can be as high as 92.8%, and the selectivity of 2-pentanone is 36.8%, and the catalyst raw materials used in the process are cheap and easy to obtain, and the preparation method is simple , using a normal pressure reaction process, easy to operate, and has potential industrial application prospects.

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 Patents(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