read： 470 time：2024-05-22 13:10:42 from：
The manufacturing method of dialkyl adipate (DAA), also known as dialkyl adipate, is an important raw material for chemical production, widely used in fields such as plastics, fibers, lubricant additives, etc. The following is about the manufacturing method of DAA
1、 The main raw materials for manufacturing DAA are adipic acid and alcohol compounds. Common alcohol compounds include methanol, ethanol, propanol, etc. Before starting manufacturing, it is necessary to ensure that the purity and quality of the raw materials meet production requirements
2、 Esterification reaction: Add adipic acid and alcohol compounds in a certain molar ratio to a reaction vessel, heat to a certain temperature, and add a catalyst for esterification reaction. Esterification reaction is a reversible reaction that requires controlling the reaction conditions to proceed in the direction of generating DAA. Normally, the reaction temperature needs to be between 100-200 ℃, and the reaction time varies from several hours to tens of hours
3、 After the reaction is completed, it is necessary to separate and purify the reaction mixture to obtain a high-purity DAA product. Common separation methods include distillation, extraction, crystallization, etc. Among them, distillation is the most commonly used method, which can separate DAA from unreacted raw materials and other by-products
4、 Quality inspection is required for the separated and purified DAA products to ensure that their purity, color, acidity, and other indicators meet production requirements. Common testing methods include gas chromatography, mass spectrometry, titration, etc
The above is the basic manufacturing method of DAA, but the specific production process may vary due to factors such as different manufacturers, equipment conditions, and raw material sources. In addition, it is necessary to pay attention to safety during the production process to avoid safety accidents caused by high temperature, high pressure, and other conditions
In summary, the manufacturing of DAA requires a certain level of chemical knowledge and skills, as well as strict adherence to production processes and safety operating procedures to ensure product quality and production safety.
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