Production technology for isophorone

A technology of isophorone and production process, applied in the field of isophorone production process, can solve the problems of high production cost and high energy consumption, achieve good energy saving effect, simple production process, easy to safe and stable production Effect

Active Publication Date: 2013-12-11
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is: to provide the production process of isophorone, first the raw material acetone is vaporized through a vaporization tower, then the acetone gas is heated to the reaction temperature with a heater, and then passed into a fixed-bed reactor equipped with a catalyst , the prod...

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  • Production technology for isophorone

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Effect test

Embodiment 1

[0036] The first step, acetone vaporization and heating

[0037] The acetone liquid with a flow rate of 10000kg / h is first poured into the vaporization tower 1 for vaporization, the vaporization temperature is 58°C, and then heated to 200°C through the heating furnace 2;

[0038] The second step, acetone polycondensation reaction

[0039] The acetone gas that is vaporized and heated through the first step is sent into the fixed-bed reactor 3 that is equipped with a magnesium-calcium-aluminum solid basic catalyst whose composition is the molar ratio of Mg / Ca / Al=8:1:8. The fixed bed reactor is filled with polycondensation reaction, the reaction temperature is 200°C, the reaction pressure is 100KPa, and the reaction products are mainly water, mesityl oxide, isomers of mesityl oxide, mesitylene, isophorone and tetramerization products mixture;

[0040] The third step, recovery of acetone

[0041] The reaction product obtained through the acetone polycondensation reaction in the...

Embodiment 2

[0049] The first step, acetone vaporization and heating

[0050] The acetone liquid with a flow rate of 8000kg / h is first poured into the vaporization tower 1 for vaporization, the vaporization temperature is 80°C, and then heated to 300°C through the heating furnace 2;

[0051] The second step, acetone polycondensation reaction

[0052] The acetone gas that is vaporized and heated through the first step is sent into the fixed-bed reactor 3 that is equipped with a magnesium-calcium-aluminum solid basic catalyst whose composition is the molar ratio of Mg / Ca / Al=8:1:8. The fixed bed reactor is filled with polycondensation reaction. The reaction temperature is 300°C and the reaction pressure is 250KPa. The reaction products are mainly water, mesityl oxide, isomers of mesityl oxide, mesitylene, isophorone and tetramerization products. mixture;

[0053] The third step, recovery of acetone

[0054] The reaction product obtained through the acetone polycondensation reaction in the ...

Embodiment 3

[0062] The first step, acetone vaporization and heating

[0063] The acetone liquid with a flow rate of 12000kg / h is first poured into the vaporization tower 1 for vaporization, the vaporization temperature is 100°C, and then heated to 350°C through the heating furnace 2;

[0064] The second step, acetone polycondensation reaction

[0065] The acetone gas that is vaporized and heated through the first step is sent into the fixed-bed reactor 3 that is equipped with a magnesium-calcium-aluminum solid basic catalyst whose composition is the molar ratio of Mg / Ca / Al=8:1:8. The fixed bed reactor is filled with polycondensation reaction, the reaction temperature is 350°C, the reaction pressure is 500KPa, and the reaction products are mainly water, mesityl oxide, isomers of mesityl oxide, mesitylene, isophorone and tetramerization products mixture;

[0066] The third step, recovery of acetone

[0067]The reaction product obtained through the acetone polycondensation reaction in the...

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Abstract

The invention relates to a production technology for isophorone which belongs to an unsaturated compound with a keto group as a constituent part of the six-membered ring. The production technology comprises the steps: introducing acetone subjected to vaporization and heating into a fixed bed reactor loaded with an alkali catalyst for a condensation reaction with a reaction temperature of 200-350 DEG C and a reaction pressure of 100-500 KPa, wherein the fixed bed reactor is filled with the alkali catalyst, the reaction products is a mixture mainly comprising water, mesityl oxide, mesityl oxide isomer, mesitylene, isophorone and a tetramer product; placing the reaction product obtained in acetone condensation polymerization after acetone is recovered in a cutting tower to cut isophorone, the tetramer product and light components in the reaction product, to obtain heavy components from the bottom of the tower, making the heavy components enter into a refining tower with a side line by a self-compaction mode, and drawing the product isophorone with a mass percent concentration of more than 99% from the side line of the refining tower. The production technology of the invention overcomes the disadvantages in the prior art of high production cost, easily-caused auto-agglutination problem and high energy consumption.

Description

technical field [0001] The technical scheme of the present invention relates to an unsaturated compound with a keto group as a component of a six-membered ring, specifically a production process for isophorone. Background technique [0002] Isophorone is a very important high-boiling solvent, which can be miscible with most organic solvents, and is also used in the production of polyurethane, coatings, pharmaceuticals, elastomers and adhesives. [0003] The existing production methods of isophorone include: one is to prepare isophorone through cyclization and hydrolysis with mesityl oxide and ethyl acetoacetate under the action of a catalyst. This process is carried out under normal pressure and low temperature. Although the condition is mild and the operation is simple, it is difficult to popularize due to the high price of raw materials and high production cost. It is generally only suitable for a small amount of preparation in the laboratory; the second is the method for ...

Claims

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Application Information

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IPC IPC(8): C07C49/603C07C45/82C07C45/74
CPCY02P20/10
Inventor 吕建华陈红燕刘继东王洪海方静
Owner HEBEI UNIV OF TECH
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