Alkyl ketene dimer, preparation method and application thereof

A technology for the reaction of alkyl ketene dimer and diethylene triamine, which is applied in textiles and papermaking, fiber raw material processing, non-fibrous pulp addition, etc., can solve problems such as complex process, achieve simple process, improve Cobb value, The effect of high content

Active Publication Date: 2011-02-16
SHANGHAI DONGSHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The product prepared by this method needs to be obtained by cleaning and extracting with dilute acid solution or centrifuging, and the content of alkyl ketene dimer can reach up to 93.5% by weight, but the preparation method is complicated

Method used

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  • Alkyl ketene dimer, preparation method and application thereof
  • Alkyl ketene dimer, preparation method and application thereof
  • Alkyl ketene dimer, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of alkyl ketene dimers:

[0024] Add 120 grams of diethylenetriamine to a 1000ml reactor, heat up to 55°C, add 400 grams of C 16 Saturated fatty acid chloride, the dropwise addition time is 2 hours. After the dropwise addition was completed, the mixture was kept at 55° C. for 3 hours. Then add 400 grams of 70 DEG C deionized water under stirring, and continue to stir for 10 minutes, stop stirring, and remove the bottom layer of diethylenetriamine hydrochloride aqueous solution after 30 minutes (the process temperature remains at 70 DEG C). Add 400 grams of 70° C. deionized water under stirring, and continue to stir for 10 minutes, stop stirring, and remove the bottom water after 30 minutes (the process temperature remains at 70° C.). The prepared sample was transferred to a 1000ml round-bottomed flask while hot, and the remaining moisture was evaporated with a rotary evaporator RV 10 digital display type V (IKA company), and the obtained sample passed thro...

Embodiment 2

[0026] Preparation of alkyl ketene dimers:

[0027] Add 210 grams of diethylenetriamine to a 2000ml reactor, heat up to 85°C, and add 300 grams of C 22 Saturated fatty acid chloride, the dropwise addition time is 0.5 hours. After completion of the dropwise addition, the mixture was kept at 85° C. for 0.5 hours. Then add 600 grams of 80° C. deionized water under stirring, and continue to stir for 15 minutes, stop stirring, and remove the bottom layer of diethylenetriamine hydrochloride aqueous solution after 20 minutes (the process temperature remains at 80° C.). Add 600 grams of 70° C. deionized water under stirring, and continue to stir for 15 minutes, stop stirring, and remove the bottom water after 20 minutes (the process temperature remains at 80° C.). The prepared sample was transferred to a 1000ml round-bottomed flask while hot, and the remaining moisture was evaporated with a rotary evaporator RV 10 digital display type V (IKA company), and the obtained sample passed ...

Embodiment 3

[0029] Add 150 grams of diethylenetriamine to a 2000ml reactor, heat up to 80°C, add 150 grams of C 20 Saturated fatty acid chloride and 150 g C 18 Saturated fatty acid chloride, the dropwise addition time is 1.5 hours. After completion of the dropwise addition, the mixture was kept at 80° C. for 2.0 hours. Then add 450 grams of 75 DEG C deionized water under stirring, and continue stirring for 12 minutes, stop stirring, and remove the bottom layer of diethylenetriamine hydrochloride aqueous solution after 25 minutes (the process temperature remains at 75 DEG C). Add 400 grams of 75° C. deionized water under stirring, and continue to stir for 12 minutes, stop stirring, and remove the bottom water after 25 minutes (the process temperature remains at 75° C.). The prepared sample was transferred to a 1000ml round-bottomed flask while hot, and the remaining moisture was evaporated with a rotary evaporator RV 10 digital display type V (IKA company), and the obtained sample passed...

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Abstract

The invention provides an alkyl ketene dimer, a preparation method and application thereof. The preparation method comprises the following steps: reacting acyl chloride with diethylenetriamine to generate an amine salt and the alkyl ketene dimer; and extracting and separating the mixture with water to obtain the alkyl ketene dimer. The alkyl ketene dimer is a high-performance and environment-friendly product and can be used for food packaging and papers for daily use. The product is mainly applied to alkyl ketene dimer (AKD) neutral sizing agents and can greatly improve the Cobb value of papersheets.

Description

technical field [0001] The invention relates to an alkyl ketene dimer, its preparation method and its application in papermaking sizing. Background technique [0002] Alkyl ketene dimer is a kind of wax, and its molecular structure can be represented by the following formula: [0003] [0004] R 1 for C 4 ~C 30 Alkyl or C 4 ~C 30 Alkenyl, R 2 for hydrogen or C 1 ~C 8 alkyl. The melting point of alkyl ketene dimer is 40-52°C. It is used as a sizing agent for papermaking pulp to make the paper impervious to water. It is used for food packaging paper or other corresponding purposes. [0005] At present, in the domestic production of synthetic alkyl ketene dimers, the synthesis reaction temperature is lower than the melting point of alkyl ketene dimers, generally around 25°C. At this temperature, the reaction speed is slow, and a long holding time is required. Moreover, the viscosity of the material is high at this temperature. A large amount of toluene solvent need...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D305/12D21H17/17D21H21/16
Inventor 施晓旦尹东华王养臣
Owner SHANGHAI DONGSHENG NEW MATERIALS
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