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Preparation method of alkyl ketene dimer

A technology of alkyl ketene dimer and system, which is applied in the preparation/purification of carbon, the preparation of organic compounds, the preparation of carboxylate, etc., which can solve the problem of the decrease of sizing effect of alkyl ketene dimer and the influence of alkanes The adaptation field and application range expansion of alkyl ketene dimer, the adverse effect of alkyl ketene dimer sizing effect and other problems, achieve the effect of excellent sizing effect, excellent long-term stability and excellent sizing performance

Active Publication Date: 2022-05-27
山东奥赛新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But, find through inventor's research, add in the auxiliary agent component in the alkyl ketene dimer (AKD), although can improve the long-term stability performance of emulsion to a certain extent, but will have a negative impact on the stability of the alkyl ketene dimer The sizing effect is adversely affected, resulting in a decrease in the sizing effect of the alkyl ketene dimer, which affects the adaptation field and application scope expansion of the alkyl ketene dimer

Method used

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  • Preparation method of alkyl ketene dimer
  • Preparation method of alkyl ketene dimer

Examples

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Effect test

Embodiment 1

[0033] Preparation method of alkylenone dimer, as follows:

[0034] 1. Intermediate preparation

[0035] A predetermined number of stearic acid is put into the intermediate reactor at a heating rate of 2 ° C / min, heated to 75 ° C insulation, 10 RPM stirred for 2h; then under 30 RPM stirring conditions, at a feeding rate of 10 mL / min, a predetermined number of catalysts are put into the catalyst, during the catalyst input process, the temperature in the intermediate reactor is kept stable at 78 ° C; after the catalyst is completed, 30 RPM continues to stir for 20 min; then at 70 m 3 The inlet rate of / h is fed into the carbonyl chloride, and after the carbonyl chloride is passed through, it is naturally cooled, and when it is cooled to 60 °C, 2m is used 3 / h of the inlet rate, into the pure nitrogen, nitrogen infusion time of 0.5h; then put into a predetermined number of modified activated carbon, 10RPM stirring 40min, filtration and separation of modified activated carbon, to ...

Embodiment 2

[0060] Preparation method of alkylenone dimer, as follows:

[0061] 1. Intermediate preparation

[0062]A predetermined number of stearic acid is put into the intermediate reactor at a heating rate of 3 ° C / min, heated to 78 ° C insulation, stirred at 15 RPM for 2.5h; then under the condition of 40 RPM stirring, at a feeding rate of 15 mL / min, put into a predetermined number of catalysts, during the catalyst input process, the temperature in the intermediate reactor is kept stable at 80 ° C; after the catalyst is completed, 40 RPM continues to stir for 30min; then 75 m 3 The passage rate of / h is fed into the carbonyl chloride, and after the carbonyl chloride is passed through, it is naturally cooled, and when it is cooled to 65 °C, 2.5m is used 3 The inlet rate of / h, pure nitrogen, nitrogen inlet time of 0.8h; then a predetermined number of modified activated carbon, 15RPM stirred for 50min, filtration and separation of modified activated carbon, to obtain stearic acid chlor...

Embodiment 3

[0087] Preparation method of alkylenone dimer, as follows:

[0088] 1. Intermediate preparation

[0089] A predetermined number of stearic acid into the intermediate reactor, at a heating rate of 5 ° C / min, heated to 80 ° C insulation, 20RPM stirring for 3h; and then under the condition of 50RPM stirring, at a feeding rate of 20mL / min, into a predetermined number of catalysts, the catalyst input process, keep the temperature in the intermediate reactor stable at 82 ° C; after the catalyst is completed, 50RPM continues to stir for 50min; then at 80m 3 The passage rate of / h is fed into the carbonyl chloride, and after the carbonyl chloride is passed, it is naturally cooled, and when it is cooled to 70 °C, 3m is used 3 / h of the inlet rate, through the pure nitrogen, nitrogen infusion time of 1h; then put into a predetermined number of modified activated carbon, 20RPM stirring 60min, filtration and separation of modified activated carbon, to obtain stearic acid acid chloride.

[0...

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Abstract

The invention provides a preparation method of an alkyl ketene dimer, and belongs to the field of organic synthesis, and the preparation method comprises the steps of intermediate preparation, modifier preparation, synthesis, refining and shearing. The alkyl ketene dimer has the beneficial effects that the prepared alkyl ketene dimer can effectively avoid adverse effects such as reduction of the sizing effect of the alkyl ketene dimer caused by auxiliary components in the subsequent application process, and an excellent sizing effect can be realized without using a large amount of auxiliaries in the later application process.

Description

Technical field [0001] The present invention relates to the field of organic synthesis, in particular to a method for preparing an alkylenone dimer. Background [0002] Since the twentieth century, the papermaking industry has shifted from acidic paper copying to medium alkaline paper copying, which is a revolutionary change in the papermaking process, which has greatly improved the quality of paper, expanded the range of fillers, reduced pulp consumption and energy consumption, reduced environmental pollution, and extended the service life of equipment. Neutral sizing is a major progress in modern sizing technology, greatly improving paper quality, expanding the range of fillers, reducing pulp consumption, energy consumption, reducing environmental pollution, prolonging the service life of equipment, is the inevitable development trend of the entire paper industry. [0003] At present, medium and alkaline sizing is often used in production, mainly alkylenone dimer (AKD) and alke...

Claims

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Application Information

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IPC IPC(8): C07D305/12C07C51/60C07C53/42C01B32/05D21H21/16D21H17/17
CPCC07D305/12C07C51/60C01B32/05D21H21/16D21H17/17C07C53/42Y02P20/584
Inventor 王丙奎张革仓刘军白永亮
Owner 山东奥赛新材料有限公司
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