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Raw material for preparing liquid branched-chain AKD as well as preparation method and application of liquid branched-chain AKD

A liquid, branched-chain technology, applied in the addition of water repellents, organic chemistry, etc., can solve the problems of slippery paper, high steam consumption, slow curing speed, etc., to reduce papermaking energy consumption, reduce waste water discharge, improve paper performance effect

Inactive Publication Date: 2015-02-25
周元幸 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The AKD sizing agent in the prior art has many shortcomings in the paper sizing process, such as: slow curing speed, easy slipping during paper production, large steam consumption, etc.

Method used

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  • Raw material for preparing liquid branched-chain AKD as well as preparation method and application of liquid branched-chain AKD
  • Raw material for preparing liquid branched-chain AKD as well as preparation method and application of liquid branched-chain AKD
  • Raw material for preparing liquid branched-chain AKD as well as preparation method and application of liquid branched-chain AKD

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: the preparation raw material of liquid branched chain AKD (best)

[0028] 60-80 parts by weight of straight chain saturated alkyl fatty acid of C16-C18

[0029] C16-C18 branched chain saturated alkyl fatty acid 20-40 parts by weight

[0030] A total of 100 parts by weight of the above mixture are uniformly mixed to obtain a raw material for preparing liquid branched AKD, and the melting point of the mixture is about 25°C.

Embodiment 2

[0032] The mixture of iso-tetradecanoic acid, isopentadecanoic acid, isohexadecanoic acid, iso-heptadecanoic acid, iso-octadecanoic acid, and iso-eicosanoic acid is used as the raw material for the preparation of liquid branched chain AKD. The sum of acid and isostearic acid accounts for 70-80wt%.

[0033] Embodiment 2: the preparation method of liquid branched chain AKD

[0034] 1) acid chlorination: the alkyl fatty acid mixture of embodiment 1 reacts with phosphorus trichloride to make alkyl fatty acid chloride;

[0035] 2) Dimerization: add a dissolved amount of 2,4-dimethyl-2,4-diazapentane to the toluene solvent, then slowly add the alkyl fatty acid chloride in step 1), and control the temperature at 10-50 degrees Celsius After 1.5-2.5 hours, the dropwise addition is completed, and the temperature is controlled at 50-70°C for 1 hour, and then 3-7wt% dilute sulfuric acid is added to form ammonium salts to precipitate the excess amines, and the solvent is distilled off und...

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Abstract

The invention relates to a sizing agent for papermaking and particularly relates to a raw material for preparing liquid branched-chain AKD as well as a preparation method and application of the liquid branched-chain AKD. The raw material for preparing liquid branched-chain AKD is an alkyl fatty acid mixture of which the melting point is -15 to 35 DEG C and the degree of saturation is greater than 97%. The preparation method of the liquid branched-chain AKD comprises the following reaction steps of acylating chlorination and dimerization. The prepared liquid branched-chain AKD is used as the sizing agent for papermaking. By the liquid branched-chain AKD, the performance of the paper can be improved; the energy consumption during papermaking is decreased; the wastewater emission is decreased; the papermaking cost is reduced and the long-term running performance of the papermaking machine is improved.

Description

technical field [0001] The invention relates to a paper-making sizing agent, in particular to a preparation raw material, a preparation method and an application of a liquid branched chain AKD. Background technique [0002] AKD (Alky Ketene Dimer, alkyl ketene dimer, alkyl carbon chain length is generally C14-C18) 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 raw powder in the prior art is produced with straight-chain fatty acid as the main raw material, and the general chemical formula of the raw material is: CH 3 (CH 2 ) n COOH, commonly used in industry is octadecanoic acid (stearic acid). The AKD synthesized in the prior art is a double-bond straight-chain crystalline product with a melting p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D305/12D21H21/16
CPCC07D305/12D21H21/16
Inventor 周元幸王新田周永强
Owner 周元幸
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