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Preparation method and application of alkenyl succinic anhydride

An alkenyl succinic anhydride, maleic anhydride technology, applied in chemical instruments and methods, textiles and papermaking, chemical/physical/physical-chemical reactors, etc., can solve the problems affecting product color and quality, high energy consumption in production process, stirring Poor mixing effect and other problems, to achieve the effect of small footprint, short response time, and small total amount of materials

Pending Publication Date: 2021-04-06
SHANGHAI CHANGFA NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large reactor, high reaction temperature (generally above 210°C), high temperature negative pressure distillation and purification, the production process requires high energy consumption and high risk
At the same time, the reaction time of the kettle-type reaction material in the high-temperature reactor is long, the stirring and mixing effect is poor, the heat transfer effect is poor, and problems such as carbonization and tar generation are easy to occur, and there are a lot of maintenance problems, which will affect the color and quality of the product.

Method used

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  • Preparation method and application of alkenyl succinic anhydride
  • Preparation method and application of alkenyl succinic anhydride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 51 parts of C18 internal olefins, 20 parts of C16 internal olefins and 1 part of antioxidant p-hydroxyanisole into tank 1 and mix well. Add 29 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 feed rate ratio is 72:29, 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 device continuously flows out, and after receiving and cooling to room temperature, it is the finished product of alkenyl succinic anhydride, which contains a small amount of unreacted raw materials.

Embodiment 2

[0033] Add 40 parts of C18 internal olefins, 33.5 parts of C16 internal olefins and 1.5 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 75:28, 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 device continuously flows out, and after receiving and cooling to room temperature, it is the finished product of alkenyl succinic anhydride, which contains a small amount of unreacted raw materials.

Embodiment 3

[0035] Add 65.3 parts of C18 internal olefins, 6.5 parts of C16 internal olefins and 1.2 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 73:28, 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 device continuously flows out, and after receiving and cooling to room temperature, it is the finished product of alkenyl succinic anhydride, which contains a small amount of unreacted raw materials.

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Abstract

The invention discloses a preparation method of alkenyl succinic anhydride, which adopts a micro-channel reactor for rapid reaction, and specifically comprises the following steps: heating a heating medium in the micro-channel reactor to a set temperature; uniformly stirring and mixing mixed olefin and an antioxidant, enabling a formed mixture to enter a first tank body, heating and melting maleic anhydride, and enabling maleic anhydride to enter a second tank body; continuously pumping the reaction raw materials of the first tank body and the second tank body into a micro-channel reactor through two feeding holes respectively, continuously discharging a reaction product from a discharging hole of the micro-channel reactor after a certain standing time, and conducting cooling to obtain the alkenyl succinic anhydride. According to the invention, efficient mixing mass transfer is carried out through a special internal structure of the micro-channel reactor, a rapid reaction is carried out under high temperature and positive pressure, and the final product alkenyl succinic anhydride is obtained in a very short time without adding a catalyst. The alkenyl succinic anhydride synthesized by the method 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 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 used in the la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16D21H17/16C07D307/60B01J19/00
CPCD21H21/16D21H17/16C07D307/60B01J19/0093
Inventor 施晓旦金霞朝
Owner SHANGHAI CHANGFA NEW MATERIAL CO LTD