Preparation method of high-performance isononanoic acid

Abstract

The invention relates to the technical field of fine chemical engineering, in particular to a preparation method of high-performance isononanoic acid. The invention provides a preparation method of high-performance isononanoic acid. The preparation method comprises the following steps: step 1, synthesizing isononanoic acid; step 2, adding water into the sodium salt crude product of isononanoic acid, heating and diluting; step 3, acidizing treatment; step 4, dehydrating and decolorizing isononanoic acid; the isononanoic acid prepared by the method disclosed by the invention is higher in conversion rate and higher in purity.

Description

technical field

[0001] The invention relates to the technical field of fine chemical industry, in particular to a preparation method of high-performance isononanoic acid. Background technique

[0002] Isononanoic acid is a kind of transparent liquid with a little peculiar smell and appearance is light yellow. Because of its excellent lubrication, emulsifying, dispersing and stability, it is widely used in the intermediate of paint and coating drier. Esters of lubricants, rust removers, cosmetics and plasticizers, and production of peroxides as polymerization catalysts.

[0003] In the process of preparing isononanoic acid, the traditional method usually uses metal salts as catalysts and peroxides as oxidizing agents to oxidize isononanoal to isononanoic acid. Since metal salts can accelerate the decomposition of peroxides effect, resulting in reduced selectivity, increased by-products, low product yield, difficult separation of metal ions, and easy local enrichment of perox...

Examples

Embodiment 1

[0037] A kind of preparation method of isononanoic acid, is characterized in that, comprises the steps:

[0038] Step 1: Synthesis of isononanoic acid: Mix 900 g of isonononanol, 240 g of sodium hydroxide, and 10 g of zinc oxide catalyst uniformly, add it into a reaction vessel, heat up to 260° C. under stirring, and react for 2 hours at a stirring speed of 200 r / min. During the reaction, the pressure of the reactor was increased, and the pressure of 2MPa was maintained for 3h, then the pressure was released, and the temperature was cooled to normal temperature to obtain the crude product of the sodium salt of isononanoic acid;

[0039] Step 2: Dilution of the crude sodium salt of isononanoic acid: adding the crude sodium salt of isononanoic acid to an equal amount of deionized water, the reaction vessel is heated to 90° C., and is stirred and diluted to obtain a dilution of the crude sodium salt of isononanoic acid ;

[0040] Step 3: Acidification treatment: acidify the crud...

Embodiment 2

[0046]A kind of preparation method of isononanoic acid, is characterized in that, comprises the steps:

[0047] Step 1: Synthesis of isononanoic acid: Mix 900 g of isonononanol, 240 g of sodium hydroxide, and 10 g of zinc oxide catalyst uniformly, add it into the reaction vessel, heat up to 260 ° C under stirring, and react for 3 hours, and the stirring speed is 200 r / min, During the reaction, the pressure of the reactor was raised, and the pressure was kept at 3MPa for 2h, then the pressure was released, and the temperature was cooled to room temperature to obtain the crude product of the sodium salt of isononanoic acid;

[0048] Step 2: dilution of the crude sodium salt of isononanoic acid: adding the crude sodium salt of isononanoic acid to an equal amount of deionized water, the reaction vessel is heated to 95° C., stirred and diluted to obtain the dilution of the crude sodium salt of isononanoic acid ;

[0049] Step 3: Acidification treatment: acidify the crude sodium sa...

Embodiment 3

[0055] A kind of preparation method of isononanoic acid, is characterized in that, comprises the steps:

[0056] Step 1: Synthesis of isononanoic acid: Mix 1000 g of isonononanol, 260 g of sodium hydroxide, and 12 g of zinc oxide catalyst uniformly, add it into a reaction vessel, heat up to 280° C. under stirring, and react for 3 hours at a stirring speed of 250 r / min. During the reaction, the pressure of the reactor was raised, and the pressure of 4MPa was maintained for 2h, then the pressure was released, and the temperature was cooled to room temperature to obtain the crude product of the sodium salt of isononanoic acid;

[0057] Step 2: dilution of the crude sodium salt of isononanoic acid: adding the crude sodium salt of isononanoic acid to an equal amount of deionized water, the reaction vessel is heated to 95° C., stirred and diluted to obtain the dilution of the crude sodium salt of isononanoic acid ;

[0058] Step 3: Acidification treatment: acidify the crude sodium ...

technical field

[0001] The invention relates to the technical field of fine chemical industry, in particular to a preparation method of high-performance isononanoic acid. Background technique

[0002] Isononanoic acid is a kind of transparent liquid with a little peculiar smell and appearance is light yellow. Because of its excellent lubrication, emulsifying, dispersing and stability, it is widely used in the intermediate of paint and coating drier. Esters of lubricants, rust removers, cosmetics and plasticizers, and production of peroxides as polymerization catalysts.

[0003] In the process of preparing isononanoic acid, the traditional method usually uses metal salts as catalysts and peroxides as oxidizing agents to oxidize isononanoal to isononanoic acid. Since metal salts can accelerate the decomposition of peroxides effect, resulting in reduced selectivity, increased by-products, low product yield, difficult separation of metal ions, and easy local enrichment of perox...

Examples

Embodiment 1

[0037] A kind of preparation method of isononanoic acid, is characterized in that, comprises the steps:

[0038] Step 1: Synthesis of isononanoic acid: Mix 900 g of isonononanol, 240 g of sodium hydroxide, and 10 g of zinc oxide catalyst uniformly, add it into a reaction vessel, heat up to 260° C. under stirring, and react for 2 hours at a stirring speed of 200 r / min. During the reaction, the pressure of the reactor was increased, and the pressure of 2MPa was maintained for 3h, then the pressure was released, and the temperature was cooled to normal temperature to obtain the crude product of the sodium salt of isononanoic acid;

[0039] Step 2: Dilution of the crude sodium salt of isononanoic acid: adding the crude sodium salt of isononanoic acid to an equal amount of deionized water, the reaction vessel is heated to 90° C., and is stirred and diluted to obtain a dilution of the crude sodium salt of isononanoic acid ;

[0040] Step 3: Acidification treatment: acidify the crud...

Embodiment 2

[0046]A kind of preparation method of isononanoic acid, is characterized in that, comprises the steps:

[0047] Step 1: Synthesis of isononanoic acid: Mix 900 g of isonononanol, 240 g of sodium hydroxide, and 10 g of zinc oxide catalyst uniformly, add it into the reaction vessel, heat up to 260 ° C under stirring, and react for 3 hours, and the stirring speed is 200 r / min, During the reaction, the pressure of the reactor was raised, and the pressure was kept at 3MPa for 2h, then the pressure was released, and the temperature was cooled to room temperature to obtain the crude product of the sodium salt of isononanoic acid;

[0048] Step 2: dilution of the crude sodium salt of isononanoic acid: adding the crude sodium salt of isononanoic acid to an equal amount of deionized water, the reaction vessel is heated to 95° C., stirred and diluted to obtain the dilution of the crude sodium salt of isononanoic acid ;

[0049] Step 3: Acidification treatment: acidify the crude sodium sa...

Embodiment 3

[0055] A kind of preparation method of isononanoic acid, is characterized in that, comprises the steps:

[0056] Step 1: Synthesis of isononanoic acid: Mix 1000 g of isonononanol, 260 g of sodium hydroxide, and 12 g of zinc oxide catalyst uniformly, add it into a reaction vessel, heat up to 280° C. under stirring, and react for 3 hours at a stirring speed of 250 r / min. During the reaction, the pressure of the reactor was raised, and the pressure of 4MPa was maintained for 2h, then the pressure was released, and the temperature was cooled to room temperature to obtain the crude product of the sodium salt of isononanoic acid;

[0057] Step 2: dilution of the crude sodium salt of isononanoic acid: adding the crude sodium salt of isononanoic acid to an equal amount of deionized water, the reaction vessel is heated to 95° C., stirred and diluted to obtain the dilution of the crude sodium salt of isononanoic acid ;

[0058] Step 3: Acidification treatment: acidify the crude sodium ...

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