Manufacturing method of ammonium oxalate
I. Introduction
Ammonium oxalate is an important raw material for the production of chemicals, which is widely used in the fields of medicine, printing and dyeing, plastics, metallurgy and so on. Therefore, it is of great significance to study the manufacturing method of ammonium oxalate for improving product quality, reducing production cost and promoting industrial development. In this paper, the manufacturing method of ammonium oxalate will be introduced in detail, including the reaction principle, process flow, equipment selection, operation points and other aspects.
II, reaction principle
The manufacture of ammonium oxalate is mainly obtained by the reaction between oxalic acid and ammonia, the reaction equation is as follows:
H2C2O4 + 2NH3-H2O → (NH4)2C2O4 + 4H2O
The reaction is an acid-base neutralization reaction, oxalic acid is an acid, ammonia is an alkali, and the two react to produce ammonium oxalate and water.
Three, process flow
The manufacturing process of ammonium oxalate mainly includes the following steps:
1. Dosing: add oxalic acid and ammonia to the reactor in a certain proportion.
2. Reaction: Under stirring condition, control the reaction temperature and time, so that oxalic acid and ammonia water fully react to produce ammonium oxalate.
3. Crystallization: Cool the reaction liquid to a certain temperature, so that ammonium oxalate crystal precipitation.
4. Centrifugal separation: centrifugal separation of the crystallized liquid to obtain ammonium oxalate crystals and mother liquor.
5. Drying: Dry the ammonium oxalate crystals to get the finished product ammonium oxalate. 4. Equipment Selection
The manufacture of ammonium oxalate requires the following equipment:
1. Reactor: used for the reaction of oxalic acid and ammonia, corrosion-resistant and good sealing reactor should be used.
2. Crystallization tank: used for crystallization of ammonium oxalate, the crystallization tank with stirring and cooling device should be used.
3. Centrifuge: used for the separation of ammonium oxalate crystal and mother liquor, the centrifuge with high degree of automation and good separation effect should be used.
4. Drying equipment: used for drying ammonium oxalate crystals, should choose the drying equipment with high efficiency and low energy consumption.
V. Operation points
1. Control the reaction temperature and time: the reaction between oxalic acid and ammonia is exothermic reaction, it is necessary to control the reaction temperature and time to avoid the decomposition of the product and the occurrence of side reactions.
2. Control the crystallization temperature and cooling speed: the crystallization temperature and cooling speed of ammonium oxalate have great influence on the crystal size and purity, so it is necessary to control the proper crystallization temperature and cooling speed.
3. Keep equipment clean and hygienic: The manufacturing process of ammonium oxalate involves corrosive substances, so it is necessary to keep the equipment clean and hygienic to avoid equipment corrosion and pollution.
VI. Safety and environmental protection measures
1. Strengthen safety production management: formulate a perfect safety production management system and operating procedures, strengthen employee safety training and education to ensure that the production process is safe and reliable.
2. Strengthen the management of waste gas and waste water: effectively manage the waste gas and waste water generated in the production process to meet the national emission standards and protect the environment and ecology.
VII.CONCLUSION
The manufacturing method of ammonium oxalate mainly includes the reaction principle, process flow, equipment selection, operation points, etc. By controlling the appropriate reaction conditions, crystallization temperature and cooling speed and other factors, high-quality and high-purity ammonium oxalate products can be manufactured. At the same time, safety and environmental protection measures are strengthened to ensure that the production process is safe and reliable and to protect the environment and ecology.
