Purification and separation integrated device for polymer

Abstract

The invention discloses a purification and separation integrated device for a polymer. The purification and separation integrated device comprises a liquid polymer tank, a receiving tank, a poor solvent tank, a fluidized bed, a rectifying tower and a PLC control system, wherein the PLC control system is used for realizing automatic control of purification, filtration, rectification and separationprocesses of the purification and separation integrated device for the polymer. The purification and separation integrated device for the polymer is convenient to operate, small in material loss, highin product yield, low in production energy consumption, good in working environment and high in safety; compared with the conventional purification and separation technology for the polymer, the purification and separation integrated device for the polymer is qualitatively improved.

Description

technical field [0001] The invention relates to the field of polymer purification, in particular to an integrated device for polymer purification and separation. Background technique [0002] Due to the addition of solvents, initiators, catalysts, and auxiliary agents (referred to as "four agents") during the polymerization of monomers, after the end of the polymerization reaction, the pure polymer is usually not obtained directly. At the same time, in the polymerization product It will also contain unreacted monomers, oligomers or small molecular components, etc., which will affect the purity of polymer products, and then affect the mechanical, electrical and optical properties of products, seriously restricting the scope of polymer applications. For example, in the electronics industry, the content of metal ions is required to be within ppb level, the medical and health industry requires the production process to meet PMG standards. Therefore, how to efficiently remove im...

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Problems solved by technology

[0006] (1) Low production efficiency: the four production processes are connected in series, the equipment is intermittently operated, the idle time is long, and the utilization rate of the equipment is low; each production equipment has non-production time for feeding and unloading; the stirring tank needs to be heated and cooled Time; the oven belongs to static drying, the drying efficiency is low, and the drying time is long; in fact, the polymer can not be removed at all after only one purification and filtration, and the impurity content can only meet the requirements after multiple purification and filtration processes (usually 3~ 10 purification / filtration cycles);

[0007] (2) High labor intensity: Since the production process is intermittent, each operation of each device involves manual transfer of materials, loading and unloading, and the labor intensity is high;

[0008] (3) Poor working environment and high safety risks: Due to the intermittent production process and poor airtightness of production equipment, each feeding and unloading involves opening the cover (opening the door). Therefore, it is inevitable that materials will run, pop, drip, leak and volatilize. Poor solvents are flammable, explosive and toxic, so the on-site working environment is poor and the safety risk is great;

[0009] (4) Large material loss: Due to the poor airtightness of the intermittent production equipment during the production process, material run, pop, drop, leak and volatilization loss are caused; in the process of centrifugal filtration, due to the vacuum effect of centrifugal force, the loss of poor solvent is increased; every time The purification process needs to add a poor solvent (usually 5-10 times that of the polymer), and multiple purification operations will double the amount of poor solvent; the polymer will be broken or pulverized under the stirring and shearing action of the stirring tank. fine, resulting in difficulty in filtration, and the loss of polymer may also occur due to material penetration through the filter medium; each type of equipment has dead angles and dead zones, and polymers will remain in the equipment, and there will inevitably be scattering, splashing, etc. during the material transfer process, resulting in polymerization The actual yield of goods decreased;

[0010] (5) High production energy consumption: the whole process of polymer purification, purification and filtration operations need to be repeated many times, consuming a large amount of electric energy; every time the stirring tank needs to be heated and cooled, the energy waste is serious; multiple purifications, washings and filtrations produce a large amount of Poor solvents for impurities are finally recovered through rectification, and the distillation tower consumes a lot of heat and cold energy; oven drying is static drying, with low heat exchange efficiency and large heat loss;

[0011] (6) Does not meet the GMP standard: Since the production equipment needs to be opened or opened and the material will be exposed to the air or contact with people during the transfer process between equipment, the existing technology cannot meet the medical and sanitary requirements;

[0012] (7) The number of equipment is large and the floor area is large

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