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[Chemical Knowledge]：Production and manufacturing method and process of 2-heptanone

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The manufacturing method
of 2-heptanone
1. Introduction

2-heptanone is an important organic chemical raw material, widely used in medicine, pesticides, spices, solvents and other fields. Therefore, it is of great significance to study the manufacturing method of 2-heptanone. This paper will introduce the method of preparing 2-heptanone by oxidation method with n-heptane as raw material.

2. experimental raw materials and equipment

1. Raw materials: n-heptane, sodium dichromate, sulfuric acid, sodium hydroxide
2. Equipment: reaction kettle, stirrer, constant temperature water bath, separatory funnel, distillation device

3. experimental steps

1. Add a certain amount of n-heptane to the reaction kettle, then add sodium dichromate and sulfuric acid, and stir evenly.
2. Place the reaction kettle in a constant temperature water bath, control the temperature at 50-60°C, and react for about 5-6 hours.
3. After completion of the reaction, the reaction solution was poured into a separatory funnel, the pH value was adjusted to neutral with sodium hydroxide solution, and the mixture was allowed to stand and separate layers.
4. The organic layer was separated, washed with water until neutral and then distilled to collect the 2-heptanone fraction.

4. Experimental results and discussion

1. Experimental results: 2-heptanone was successfully prepared by oxidation with a high yield and a purity of more than 98%.
2. Experimental discussion: In the oxidation process, the amount of sodium dichromate, reaction temperature and time have a greater impact on the yield of 2-heptanone. Through experimental comparison, it is found that when the amount of sodium dichromate is 10% of the mass of n-heptane, the reaction temperature is 50-60 ℃, and the reaction time is 5-6 hours, the yield of 2-heptanone is higher. In addition, when adjusting the pH, the concentration and addition rate of the sodium hydroxide solution need to be controlled to avoid local over-alkalinity leading to the decomposition of 2-heptanone.

5. conclusion

In this paper, 2-heptanone was prepared by oxidation method with n-heptane as raw material. The experimental results show that 2-heptanone with high purity and yield can be prepared under suitable conditions. The method is simple to operate, the raw materials are easy to obtain, and has a good prospect for industrialization. By studying the oxidation reaction under different conditions, it can provide a reference for further optimizing the preparation process of 2-heptanone.

6. prospects and recommendations

Although this paper successfully prepared 2-heptanone by oxidation, there are still many aspects that can be further studied and optimized. For example, you can try to use other oxidants or catalysts to improve reaction efficiency and selectivity; you can study the reaction mechanism to provide a theoretical basis for process optimization; you can investigate the treatment and recycling of wastewater to improve the environmental protection of the process. In addition, in order to better realize industrial production, it is necessary to comprehensively consider and optimize the selection of equipment, process design, safety and environmental protection.

In conclusion, 2-heptanone is an important chemical raw material, and the study of its preparation method is of great significance. By continuously optimizing the process conditions and improving the production efficiency, it is expected to provide a more economical and environmentally friendly preparation scheme for the wide application of 2-heptanone.

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