The unsaturated polyester resin reactor is very flexible in the process of operation, easy to adapt to different operating conditions and product varieties, and is suitable for production of small batches, multiple varieties, and long reaction times. The batch operation reactor is to add the raw materials to the reactor at a certain ratio once, and after the reaction reaches a certain requirement, the materials are discharged at one time. The reactor was continuously operated while continuously feeding the raw materials, and the reaction product was continuously discharged. When the operation reaches a steady state, the state parameters such as composition and temperature of the material at any position in the reactor do not change with time.
A semi-continuous operation reactor of an unsaturated polyester resin reactor, also referred to as a semi-batch operation reactor, is interposed between the two, usually by adding one reactant at a time and then continuously adding another reactant. After the reaction reaches a certain level, stop the operation and discharge the material.
Unsaturated polyester resin reactor can be used to produce a variety of products during operation, especially suitable for small batch and multi-species production in industrial sectors such as medicine and dyes. In addition, there is no backmixing of materials in the batch reactor, which is advantageous for most reactions.
The unsaturated polyester resin reactor avoids the disadvantages of the batch kettle, but the agitation causes backmixing of the fluid in the kettle. In the case of vigorous stirring, low liquid viscosity or long average residence time, the material flow pattern in the kettle can be regarded as a full mixed flow, and the reaction kettle is correspondingly referred to as a full mixed kettle. In the case where a high conversion rate or a series side reaction is required, the back mixing phenomenon in the tank reactor is a disadvantage. In this case, a multi-tank reactor can be used to reduce the adverse effects of back mixing, and the reaction conditions can be controlled by a separate kettle.
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