Method for preparing compound by utilizing isobutyric acid and acetic anhydride and device for preparing compound by utilizing isobutyric acid and acetic anhydride
A technology of isobutyric anhydride and isobutyric acid is applied in the preparation of organic compounds, the preparation of carbon-based compounds, and the preparation of hydroxyl compounds, which can solve the problems of low glass transition temperature and application limitations.
Pending Publication Date: 2022-07-01
IND TECH RES INST
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Problems solved by technology
The glass transition temperature of traditional polyester is low, and its application in the medium and high temperature field is limited to a certain extent
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[0024] The method and apparatus for preparing compounds using isobutyric acid and acetic anhydride described in the present disclosure will be described in detail below. It should be appreciated that the following description provides many different embodiments or examples for implementing different aspects of the invention. The specific elements and arrangements described below are merely illustrative of the invention. Of course, these are only used as examples rather than limitations of the present invention. Furthermore, repeated reference numbers or designations may be used in different embodiments. These repetitions are for simplicity and clarity of description of the present invention and do not represent any association between the different embodiments and / or structures discussed.
[0025] It must be understood that the elements specifically described or illustrated may exist in various forms known to those skilled in the art. Ordinal numbers such as "first", "second"...
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The invention provides a method and a device for preparing a compound by utilizing isobutyric acid and acetic anhydride. The method for preparing the compound by using isobutyric acid and acetic anhydride comprises the following steps. Isobutyric acid and acetic anhydride are reacted to obtain a first mixture, and the first mixture comprises isobutyric anhydride and acetic acid. Performing a first purification process on the first mixture to obtain isobutyric anhydride and acetic acid; isobutyric anhydride is subjected to a cracking process to obtain a second mixture, and the second mixture comprises dimethyl ketene, isobutyric acid and isobutyric anhydride. And performing a gas-liquid separation process on the second mixture to obtain a dimethyl ketene gas and a liquid, the liquid comprising isobutyric acid and isobutyric anhydride. And collecting the liquid, and reacting the isobutyric acid in the liquid with the acetic anhydride.
Description
technical field [0001] The present disclosure relates to a method and apparatus for preparing compounds using isobutyric acid and acetic anhydride. Background technique [0002] 2,2,4,4-Tetramethyl-1,3-cyclobutanediol (2,2,4,4-teramethyl-1,3-cyclobutanediol, CBDO) is a multifunctional intermediate with symmetrical structure, It is widely used in the synthesis of copolyesters, such as high-performance polyesters that can replace polycarbonate (PC). The glass transition temperature of traditional polyester is low, and its application in medium and high temperature fields is limited. Adding 2,2,4,4-tetramethyl-1,3-cyclobutanediol can significantly improve the glass transition temperature, weather resistance and transparency of polyester. Polyester synthesized using 2,2,4,4-tetramethyl-1,3-cyclobutanediol has excellent physical properties similar to bisphenol A, such as high impact strength, excellent dimensional stability, glass transition High temperature. [0003] Continu...
Claims
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IPC IPC(8): C07C51/56C07C53/124C07C45/89C07C49/88C07C49/39C07C45/76C07C29/145C07C35/04
CPCC07C51/56C07C45/89C07C45/76C07C29/145C07C2601/04C07C53/124C07C49/88C07C49/39C07C35/045
Inventor 杨慕震刘文宗詹淑华吴国卿高陈玑
Owner IND TECH RES INST