Production of Polymeric Biocides

The Institute of Еcotechnologies has created a family of biocides based on polyalkylene guanidine salts and the technologies for their application in many fields of economy. This called for the development of industrial synthesis techniques.

The methods were also worked out by the Institute experts, and their novelty and originality are supported by a number of Russian and international patents. These techniques were realised in the experimental production facility for the production of polymeric biocides.

The design of this facility was based on the experience in construction of such installations accumulated both in Russia and worldwide. Note that it was necessary to work out a single installation for producing the whole range of the developed biocides.

The design team succeeded in solving the difficult problem. The core of this installation is the chemical reactor that allows performing the polymer synthesis in a wide temperature and pressure range using a highly homogeneous reaction mass.

The choice of materials for the reactor body was a crucial issue due to a wide range of initial raw materials and the stringent requirements for the purity of the final product.

A series of experiments was performed with a number of Russian-made and imported alloys to determine their stability against corrosion in the reaction medium including both the raw materials and the final products.

Leading Russian experts were engaged in this study. An alloy developed by the Russian experts was found to be the most suitable for the purpose.

The unique properties of this material allow performing different synthesis stages within a single reactor volume. This resulted in a number of advantages listed below, realised in the construction of the experimental industrial facility:

  • modular production set-up;
  • reduction of costs for the auxiliary equipment due to the use of systems that allow simultaneous maintenance of the modules;
  • simultaneous production of chemicals for different applications;
  • exclusion of the unwanted contacts of the intermediate synthesis products with environment and air in the working zone;
  • essential reduction of the service water quantity necessary for the washing of the technological equipment, and thus saving the costs for the sewage treatment.

The experts working on the industrial facility design have a vast experience in the modelling the non-stationary processes in chemical technology. This allowed also to develop an effective system for low-boiling initial monomers and low-molecular oligomer recovery. This system ensures the stability of the stoichiometric composition of the reaction mix and thus decreases the range of molecular mass values in the final product.

A multistage gas purification system ensures the environmental safety of the technological process.

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