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Preparation method and application of high-purity alkenyl succinic anhydride

An alkenyl succinic anhydride, high-purity technology, applied in chemical instruments and methods, textiles and papermaking, chemical/physical/physicochemical reactors, etc., can solve problems such as large footprint, high energy consumption, and complex equipment, and achieve The effects of small footprint, low energy consumption, and simple equipment operation

Active Publication Date: 2021-03-12
SHANGHAI CHANGFA NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The combination of traditional batch reactor reaction and continuous distillation requires complex equipment, large footprint and high energy consumption

Method used

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  • Preparation method and application of high-purity alkenyl succinic anhydride
  • Preparation method and application of high-purity alkenyl succinic anhydride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add 70 parts of C18 internal olefins, 30 parts of C16 internal olefins and 1 part of antioxidant p-hydroxyanisole into tank 1 and mix well. Add 30 parts of maleic anhydride to tank 2 and heat to 65°C to melt into a liquid. The heating medium of the microchannel reactor was raised to 245° C. and the cycle was started. Add the liquid in tank 1 and tank 2 to the feed port of the microchannel reactor with a metering pump, the feeding speed ratio is 101:30, the residence time of the material in the microchannel reactor is 10 minutes, and the reaction product reacts from the microchannel The discharge port of the rectification tower continuously flows out and enters the middle of the rectification tower for rectification. Unreacted internal olefins, etc. are obtained at the top of the rectification tower, which can be recycled and reused. The refined ASA product is obtained at the bottom of the rectification tower, which enters the finished product storage tank after cooling ...

Embodiment 2

[0036] Add 54 parts of C18 internal olefins, 33 parts of C16 internal olefins and 2 parts of antioxidant p-hydroxyanisole into tank 1 and mix well. Add 30 parts of maleic anhydride to tank 2 and heat to 80°C to melt into a liquid. The heating medium of the microchannel reactor was raised to 260° C. and the cycle was started. Add the liquid in tank 1 and tank 2 to the feed port of the microchannel reactor with a metering pump, the feed rate ratio is 90:30, the residence time of the material in the microchannel reactor is 5 minutes, and the reaction product reacts from the microchannel The discharge port of the rectification tower continuously flows out and enters the middle of the rectification tower for rectification. Unreacted internal olefins, etc. are obtained at the top of the rectification tower, which can be recycled and reused. The refined ASA product is obtained at the bottom of the rectification tower, which enters the finished product storage tank after cooling .

Embodiment 3

[0038] Add 80 parts of C18 internal olefins, 8 parts of C16 internal olefins and 2 parts of antioxidant p-hydroxyanisole into tank 1 and mix well. Add 28 parts of maleic anhydride to tank 2 and heat to 90°C to melt into a liquid. The heating medium of the microchannel reactor was raised to 295° C. and the cycle was started. Add the liquid in tank 1 and tank 2 to the feed port of the microchannel reactor with a metering pump, the feeding speed ratio is 90:28, the residence time of the material in the microchannel reactor is 1 minute, and the reaction product reacts from the microchannel The discharge port of the rectification tower continuously flows out and enters the middle of the rectification tower for rectification. Unreacted internal olefins, etc. are obtained at the top of the rectification tower, which can be recycled and reused. The refined ASA product is obtained at the bottom of the rectification tower, which enters the finished product storage tank after cooling . ...

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Abstract

The invention discloses a preparation method of high-purity alkenyl succinic anhydride, which adopts a micro-channel reactor for rapid reaction and specifically comprises the following steps: heatinga heating medium in the micro-channel reactor to a set temperature; uniformly stirring and mixing a mixed olefin and an antioxidant, enabling the mixture to enter a first tank body, heating and melting maleic anhydride, and enabling maleic anhydride to enter a second tank body; pumping reaction raw materials of the first tank body and the second tank body continuously into the micro-channel reactor through two feeding holes respectively, enabling reaction products to be continuously discharged from a discharging hole of the micro-channel reactor after a certain standing time, and then enter arectifying tower to be rectified, so that high-purity alkenyl succinic anhydride is obtained. According to the invention, efficient mixing mass transfer is carried out through a special internal structure of the micro-channel reactor, rapid reaction is carried out under high temperature and positive pressure, and high-purity alkenyl succinic anhydride is obtained through rectification. According to the method, no catalyst needs to be added, and the synthesized alkenyl succinic anhydride is high in yield and light in color and can be used as an efficient sizing agent for papermaking.

Description

technical field [0001] The invention relates to the field of sizing agent preparation, in particular to a preparation method and application of high-purity alkenyl succinic anhydride. Background technique [0002] Alkenyl succinic anhydride, referred to as ASA, is an important chemical raw material widely used in papermaking, lubricating oil, wood preservation, metal rust prevention, resin hardening, leather waterproofing, textile waterproofing and other fields. In the paper industry, ASA is an important neutral sizing agent. Sizing agent is an important paper-making additive, which can improve the water resistance, oil resistance, smoothness, strength and printing adaptability of paper. Sizing agents for papermaking include rosin sizing agents, paraffin sizing agents, alkyl ketene dimer (AKD) sizing agents, styrene-acrylic (SAE) sizing agents, alkenyl succinic anhydride (ASA) sizing agents Wait. At present, AKD sizing agent, rosin sizing agent and ASA sizing agent are us...

Claims

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Application Information

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IPC IPC(8): C07D307/60D21H21/16D21H17/16B01J19/00
CPCC07D307/60D21H21/16D21H17/16B01J19/0093Y02P20/10
Inventor 施晓旦金霞朝
Owner SHANGHAI CHANGFA NEW MATERIAL CO LTD
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