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. It can solve the problems of complex process and achieve simple process and good water resistance effect , Improve the effect of Cobb value

Active Publication Date: 2009-11-11
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
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Effect test

Embodiment 1

[0023] Preparation of alkyl ketene dimer:

[0024] Add 120 grams of diethylenetriamine into a 1000ml reactor, heat to 55℃, and add 400 grams of C dropwise 16 Saturated fatty acid acid chloride, dripping time is 2 hours. After the dropwise addition, it was kept at 55°C for 3 hours. Then 400 g of deionized water at 70°C was added under stirring, and stirring was continued for 10 minutes, and the stirring was stopped. After 30 minutes, the underlying diethylenetriamine hydrochloride aqueous solution was removed (the temperature was maintained at 70°C in this process). Under stirring, add 400 g of deionized water at 70°C and continue stirring for 10 minutes, stop stirring, and remove the bottom water after 30 minutes (the temperature is kept at 70°C in this process). The prepared sample was transferred to a 1000 ml round bottom flask while it was hot, and the remaining water was evaporated using a rotary evaporator RV 10 digital display type V (IKA company), and the obtained sample wa...

Embodiment 2

[0026] Preparation of alkyl ketene dimer:

[0027] Add 210 grams of diethylenetriamine into a 2000ml reactor, heat up to 85°C, and add 300 grams of C dropwise 22 Saturated fatty acid acid chloride, dripping time is 0.5 hours. After the dropwise addition, it was kept at 85°C for 0.5 hour. Then add 600 g of 80°C deionized water under stirring, and continue stirring for 15 minutes, stop stirring, and remove the bottom layer of diethylenetriamine hydrochloride aqueous solution after 20 minutes (the temperature is kept at 80°C in this process). Add 600 g of deionized water at 70°C under stirring, and continue stirring for 15 minutes, stop stirring, and remove the bottom water after 20 minutes (the temperature is kept at 80°C in this process). The prepared sample was transferred to a 1000 ml round bottom flask while it was hot, and the remaining water was evaporated using a rotary evaporator RV 10 digital display type V (IKA company), and the obtained sample was passed through a 200-mes...

Embodiment 3

[0029] Add 150 grams of diethylenetriamine into a 2000ml reactor, heat up to 80℃, and add 150 grams of C dropwise 20 Saturated fatty acid acid chloride and 150 g C 18 Saturated fatty acid acid chloride, dripping time is 1.5 hours. After the dropwise addition, it was kept at 80°C for 2.0 hours. Then add 450 g of 75°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 temperature is kept at 75°C in this process). Add 400 g of deionized water at 75°C under stirring, and continue stirring for 12 minutes, stop stirring, and remove the bottom water after 25 minutes (the temperature is kept at 75°C in this process). The prepared sample was transferred to a 1000 ml round bottom flask while it was hot, and the remaining water was evaporated using a rotary evaporator RV 10 digital display type V (IKA company), and the obtained sample was passed through a 2...

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PUM

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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 paper sheets.

Description

Technical field [0001] The invention relates to an alkyl ketene dimer, a preparation method thereof and application in paper sizing. Background technique [0002] Alkyl ketene dimer is a waxy substance, and its molecular structure can be represented by the following formula: [0003] [0004] R 1 Is C 4 ~C 30 Alkyl or C 4 ~C 30 Alkenyl, R 2 Is hydrogen or C 1 ~C 8 alkyl. Alkyl ketene dimer has a melting point of 40-52°C. It is used as a sizing agent for papermaking pulp to make the prepared paper impermeable to food packaging paper or other corresponding applications. [0005] In the current domestic production of synthetic alkyl ketene dimers, the synthesis reaction temperature is lower than the melting point of the alkyl ketene dimer, generally around 25°C. At this temperature, the reaction speed is slow, the heat preservation time is long, and the viscosity of the material is high at this temperature, and a large amount of toluene solvent needs to be added to the reaction ma...

Claims

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Application Information

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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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