Method for adding raw materials during the production of polyesters or copolyesters
OwnerStefan Deiss, Klaus Kirsten +2inventors
InventorsStefan Deiss, Klaus Kirsten, Lutz Janko, Maik Rau
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Abstract
The invention relates to a method for the manufacture of polyester or copolyester without the application of a weighing machine for dosing the solid principal raw material, dicarboxylic acid, and an appropriate concept for the closed-loop control of the molar ratio of the paste prepared from the starting materials without the direct measurement of the mass flow of the solid principal raw material, dicarboxylic acid, by weighing. In addition, an indirect method for the determination of the raw material consumption without direct weighing of the solid raw material is suggested.
Claims8
Method for the production of a paste for the manufacture of a polyester from solid and liquid raw materials and, where applicable, from additives, characterised in that the closed-loop control of the charging rate of the solid raw material occurs based on the deviation of the density of the prepared paste from a setpoint value.
Dependencies are inferred from the claim text.