Novel polyether ketone refining process

Abstract

The invention discloses a novel polyether ketone refining process, belonging to the fields of chemical engineering and fine chemistry industry, and particularly relates to a process for refinishing polyether ketone. A technical process comprises the following steps of: I, extensively leaching acetone repeatedly, and quickly feeding all diphenyl sulfone in polyether ketone in a refining kettle into an acetone solution of an acetone evaporation kettle to realize separation of diphenyl sulfone from polyether ketone; II, washing with water; III, drying; and IV, extracting a material, and cleaning the material in an air purging state. The process has the advantages of centralized equipment, small floor area, small overall investment, short production period, high efficiency, small quantity of operating personnel, convenience for managing, high production benefit, saving in energy consumption, zero discharge of pollutants in a production process, realization of high diphenyl sulfone leaching efficiency, low boiling point of acetone, small storage amount of an acetone tank and reduction in the energy consumption in the extensive leaching process of an acetone liquid, and capability of greatly saving energy since the waste water handling capacity is low in a water washing process, and is a novel environmentally-friendly chemical process.

Description

technical field [0001] The invention belongs to the fields of chemical engineering and fine chemical industry, and in particular relates to a process for refining a polyether ketone. Background technique [0002] Polyether ketone in the prior art was first produced by the British ICI company with diphenyl sulfone as solvent, 4, 4-difluorobenzophenone and hydroquinone as raw materials, and was nucleophilic in the presence of potassium carbonate or sodium carbonate. Synthesized by substitution condensation reaction. In the past ten years, a variety of series of polyether ketone high polymer compounds have been developed successively. The common feature of the reaction products is that after the reaction, the products, solvents, by-products, etc. are mixed together to form a solid mixture at room temperature. The main reactants 4, 4-difluorobenzophenone and hydroquinone in the product all participate in the reaction. Usually, the mixed solids are pulverized, and the diphenyl...

AI Technical Summary

Problems solved by technology

The whole refining process consumes a lot of energy, and there are hidden dangers of environmental pollution, etc.

Images