Manufacturing Method of Succinic Acid
I. Introduction
Succinic acid is an important organic chemical raw material, which is widely used in the production of plastics, fibers, rubber and other polymer materials. With the continuous progress of science and technology, the manufacturing method of adipic acid has been improved and optimized. This article will introduce the manufacturing method of adipic acid in detail, including raw material selection, reaction principle, process flow, equipment selection and other aspects.
II. Selection of raw materials
The main raw materials for manufacturing adipic acid are benzene, nitric acid and oxidizing agent. Among them, benzene is a common organic chemical material, nitric acid as an oxidizing agent, can oxidize benzene to adipic acid. When choosing raw materials, cost, source, purity and other factors should be considered.
Three, reaction principle
The manufacturing process of adipic acid mainly consists of two steps: oxidation reaction and neutralization reaction. The specific reaction principles are as follows:
1. Oxidation reaction: benzene and nitric acid under the action of oxidizing agent, oxidation reaction occurs to generate adipic acid. This reaction is an exothermic reaction, and the reaction temperature needs to be controlled to avoid the occurrence of side reactions.
2. Neutralization reaction: After the end of oxidation reaction, the obtained solution of adipic acid contains nitric acid and other acidic substances, which need to be neutralized with alkaline solution to get pure adipic acid.
4. Process flow
The manufacturing process of adipic acid mainly includes the following steps:
1. Dosing: benzene, nitric acid and oxidizing agent are added into the reactor according to a certain proportion.
2. Oxidizing reaction: In the reaction kettle, control a certain temperature and pressure, so that benzene and nitric acid oxidation reaction to generate adipic acid.
3. Cooling and crystallization: After the reaction, the reaction liquid is cooled down to a certain temperature, so that the adipic acid is crystallized.
4. Filtration and washing: The crystallized adipic acid is filtered and washed with water to remove impurities.
5. Drying and packing: Dry the washed adipic acid and then pack it to get the finished adipic acid.
V. Equipment selection
In the manufacturing process of adipic acid, equipment such as reactor, crystallization tank, filter, dryer and so on are needed. When selecting the equipment, we should choose the suitable model and material of the equipment according to the requirements of the production process, in order to ensure the smooth progress of the production process.
Sixth, production control
In order to ensure the production quality and yield of already diacid, it is necessary to carry out comprehensive control of the production process. Specific control measures include:
1. Control the quality of raw materials: select high-quality raw materials to ensure that the purity and quality of raw materials meet the production requirements.
2. Control reaction conditions: In the oxidation reaction process, it is necessary to control the reaction temperature, pressure and other conditions to avoid the occurrence of side reactions.
3. Control the crystallization conditions: in the crystallization process, you need to control the cooling rate and crystallization time, in order to obtain high-quality crystallization of adipic acid.
4. Control product quality: quality inspection of finished product of adipic acid is carried out to ensure that the product quality meets the relevant standards.
VII. Environmental protection and safe production
In the manufacturing process of adipic acid, attention needs to be paid to environmental protection and safe production. Specific measures include:
1. Strengthening wastewater treatment: Properly treat the wastewater generated in the production process to avoid pollution to the environment.
2. Enhance waste gas treatment: purify and treat the waste gas generated during the production process to reduce air pollution.
3. Strengthen the safety management: establish a sound safety management system, strengthen the safety training of employees to ensure the safety and smooth operation of the production process.
VIII.CONCLUSION
Has been used as an important organic chemical raw material, and its manufacturing method has been continuously improved and optimized. When choosing the manufacturing method, comprehensive consideration should be made according to the actual situation, and suitable production process and equipment should be chosen to ensure the smooth running of the production process and improve the quality of products and production efficiency.
