The Production Process of Ethylenediamine-ethylenimine copolymer

Ethylenediamine-ethylenimine (ED-EI) copolymer is a synthetic polymer that is widely used in various applications in the chemical industry.
The production process of ED-EI copolymer involves several stages, starting from the preparation of the raw materials and ending with the final product.

1. Preparation of raw materials:
   The production of ED-EI copolymer involves the use of two main raw materials, ethylenediamine and ethylenimine.
   These materials are used in appropriate ratios to produce the desired copolymer.
   Ethylenediamine and ethylenimine are both toxic and hazardous chemicals, and proper safety measures must be taken during their handling and storage.
   
2. The reaction process:
   The production of ED-EI copolymer involves a reaction process between ethylenediamine and ethylenimine.
   The reaction is exothermic and requires careful temperature control to avoid any unwanted side reactions.
   The reaction is usually carried out in a stainless steel reactor, which is equipped with a stirring system, a temperature control system, and a gas cooling system.
   The reaction is usually carried out under an inert gas atmosphere, such as nitrogen or argon, to protect the reaction mixture from atmospheric oxygen.
   
3. Process control:
   The production of ED-EI copolymer involves a series of process control measures to ensure the quality of the final product.
   These measures include monitoring the temperature, pressure, and concentration of the reactants during the reaction.
   The reaction mixture is also continuously stirred to ensure a uniform reaction.
   The reaction is stopped when the desired degree of polymerization is achieved, and the resulting copolymer is then precipitated in water.
   
4. Purification and recovery:
   After the reaction is stopped, the resulting copolymer is extracted from the reaction mixture and purified by precipitation in water.
   The copolymer is then recovered by centrifugation and washed with water to remove any impurities.
   The purified copolymer is then dried and pelletized, which makes it easier to handle and store.
   
5. Quality control:
   The production process of ED-EI copolymer involves several quality control measures to ensure that the final product meets the required specifications.
   These measures include testing the physical and chemical properties of the copolymer, such as its molecular weight, viscosity, and solubility.
   The final product is also tested for any impurities or contaminants that may have been introduced during the production process.
   

In conclusion, the production process of ED-EI copolymer involves several stages, starting from the preparation of raw materials and ending with the final product.
The production process requires careful control and monitoring to ensure the quality of the final product.
The use of appropriate safety measures and quality control measures is essential to ensure the safety of workers and the quality of the final product.