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Method for producing liquid branched-chain AKD (Alky Ketene Dimer) raw powder material through deeply hydrogenating monomer acid

A technology of deep hydrogenation and monomeric acid, which is applied in the direction of ozone oxidation to prepare carboxylic acid, etc., to achieve the effect of reducing production cost, good reaction effect and expanding application field

Active Publication Date: 2015-02-18
周元幸
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Problems solved by technology

After searching by the applicant, there is no report on the preparation of branched chain AKD raw powder raw materials from monomeric acid

Method used

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Embodiment

[0031] Embodiment: this embodiment is the best embodiment

[0032] The method for producing raw material of liquid branched chain AKD raw material by deep hydrogenation of monomeric acid comprises the following steps:

[0033] 1) Add 3000g monomeric acid and 140g loaded nickel catalyst into the autoclave, wherein the content of active nickel in the loaded nickel catalyst is 22-24g, and replace the air in the kettle with nitrogen twice;

[0034] 2) Vacuumize, the vacuum degree is 0.09MPa, keep for 5min;

[0035] 3) Replace twice with hydrogen, start stirring, and the rotation speed is 650-750r / min;

[0036] 4) Raise the temperature to 90-120°C, start adding hydrogen, the hydrogen pressure is 2.0MPa, and the reaction time is 3h;

[0037] 5) The temperature is raised to 175°C, the hydrogen pressure is raised to 3.5MPa, and the reaction time is 2h;

[0038] 6) The temperature is raised to 230°C, the hydrogen pressure is raised to 4.0MPa, the reaction time is 3-4h, and the hydro...

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Abstract

The invention relates to a method for producing a liquid branched-chain AKD (Alky Ketene Dimer) raw powder material through deeply hydrogenating a monomer acid. The method is characterized by essentially comprising a step of catalytically hydrogenating the monomer acid so as to obtain the liquid branched-chain AKD raw powder material, wherein the monomer acid is made from 40-60 wt% of branched-chain fatty acid and 40-60 wt% of straight-chain fatty acid, and the straight-chain fatty acid is C16-C20 unsaturated isomeric fatty acid. An AKD gluing agent which is further produced from the final product of the method is high in dehydration speed, good in reaction effect and high in aging speed and has excellent low-temperature gluing characteristics; and the production cost of paper sheets can be reduced, and the problems in the existing palm oil and stearic acid AKD technologies are solved.

Description

technical field [0001] The invention relates to a raw material of AKD raw powder and a preparation method thereof, in particular to a method for producing liquid branched-chain AKD raw powder by deep hydrogenation of monomeric acid. Background technique [0002] AKD (Alky Ketene Dimer, alkyl ketene dimer) is a cationic medium / alkaline sizing agent. The usual preparation method of commercial AKD sizing agent is: AKD original powder raw material and special emulsifier are mixed in a certain proportion, and emulsion is made by high-speed shearing, high pressure, homogenization and other physical methods. The raw material of AKD powder in the prior art is produced with palm oil stearic acid as the main raw material, which is a double bond linear crystal. The AKD sizing agent prepared from AKD raw powder raw materials in the prior art has many shortcomings in the paper sizing process, such as: slow curing speed, easy slipping during paper production, and large steam consumption....

Claims

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Application Information

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IPC IPC(8): C07C51/36
Inventor 周元幸
Owner 周元幸
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