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A kind of alkenyl succinic anhydride and its preparation method and application

A technology of alkenyl succinic anhydride and maleic anhydride, which is applied in the field of acid anhydride, can solve the problems of low production efficiency and long preparation time, and achieve the effects of short reaction time, high efficiency and simple synthesis process

Active Publication Date: 2018-12-18
SHANGHAI DONGSHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation time is relatively long and the production efficiency is low

Method used

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preparation example Construction

[0020] The present invention provides a kind of preparation method of alkenyl succinic anhydride, it is characterized in that, comprises: α-olefin, maleic anhydride and catalyst are at the temperature of 140 ℃-240 ℃, under the pressure of 0.3-0.5Mpa, react 5- After 10 hours, the obtained reactant was purified to obtain the alkenyl succinic anhydride; wherein, the catalyst was a tin catalyst.

[0021] In a preferred embodiment of the present invention, the components and their weight ratios include:

[0022] 100 parts of α-olefins;

[0023] 25-50 parts of maleic anhydride;

[0024] Catalyst 0.01 to 0.1 parts.

[0025] Wherein, the α-olefin is CH 3 –(CH 2 )n–CH=CH 2 , at least one of n=13-17.

[0026] The catalyst is at least one selected from monobutyltin oxide, dibutyltin oxide, dibutyltin oxide chloride, dibutyltin dilaurate and dibutyltin diacetate.

[0027] Further, the particle size of the catalyst is 3-5um.

[0028] Wherein, the reaction temperature is preferably ...

Embodiment 1

[0035] 100 g of α-olefin (CH 3 –(CH 2 ) 17 –CH=CH 2 ), 25 grams of maleic anhydride, and 0.01 grams of dibutyltin oxide (particle size 3um) were added to a stirred reactor, stirred and mixed, and pressurized to 0.3 MPa with nitrogen gas, heated to 140 ° C, and reacted at a constant temperature for 10 hours. Refined by pressure distillation to obtain the product of alkenyl succinic anhydride. Catalysts are collected and can be recycled.

Embodiment 2

[0037] 100 g of α-olefin (CH 3 –(CH 2 ) 13 –CH=CH 2 ), 50 grams of maleic anhydride, and 0.1 grams of dibutyltin dilaurate (5um in particle size) were added to a stirred reactor, stirred and mixed, pressurized to 0.5MPa with nitrogen, heated to 240°C, and reacted at a constant temperature for 5 hours. Purification by distillation under reduced pressure yields the product alkenyl succinic anhydride. Catalysts are collected and can be recycled.

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Abstract

The invention discloses a preparation method of alkenyl succinic anhydride. The preparation method comprises the following steps: carrying out a reaction on alpha-olefin, maleic anhydride and a catalyst at 140-240 DEG C under 0.3-0.5 Mpa for 5-10 h, and purifying the above obtained reaction product to obtain the alkenyl succinic anhydride, wherein the catalyst is selected from at least one of monobutyltin oxide, dibutyltin oxide, dibutyltin oxide chloride, dibutyltin dilaurate and dibutyltin diacetate, the particle size of the catalyst is 3-5 [mu]m, and the catalyst can be cyclically used. The alkenyl succinic anhydride is mainly used as a raw material for papermaking sizing agents. The preparation method has the advantages of simplicity, short reaction time and high efficiency.

Description

technical field [0001] The invention relates to an acid anhydride, in particular to an alkenyl succinic anhydride, a preparation method and application thereof. Background technique [0002] Alkenyl succinic anhydride (ASA) is a widely used light industrial fine chemical raw material. In the paper industry, as a neutral sizing agent, it can greatly improve the waterproof performance, tensile strength, abrasion resistance, whiteness, opacity and chemical environment of the paper making process. Generally, the process used to prepare ASA is isomerization with alpha olefins and then reacting with maleic anhydride to produce ASA. The raw materials used in this process are generally of low purity, so the productivity of the synthesized ASA is low, and the structure of ASA is complex, which is unfavorable for subsequent processes. [0003] To solve this problem, Chinese patent CN1241918 has improved it, using high-purity linear α and / or linear internal carbaoctacene and maleic a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D307/60
CPCC07D307/60
Inventor 施晓旦尹东华
Owner SHANGHAI DONGSHENG NEW MATERIALS
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