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Ultrafiltration in electrocoat paint plants using fibre-wound cartridges

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Cathodic electrocoat paint where title process is used to increase life of degreasing solutions and anode box electrolyte. Report described conversion to new filters achieved in 1 day with no loss of production.

Ultrafiltration in Parts Cleaning - Eliminating Interfering Effects

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Title method is now widely used for bath life extension. Process flowsheet is shown & typical performance data is given with comments on cost savings. Use of ceramic membranes offers benefits. Graph shows recovery efficiencies for surfactants, phosphates, dispersant, foam suppressant & hydrocarbons with new & old membranes. Chemical aspects of the filtration process are discussed and limits of the technology & benefits of the new silicon carbide membranes examined.

Ultrafiltration in parts cleaning - how are defects avoided?

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Investigation of application of ultrafiltration to aq. cleaning baths is reported. Recommendations incl. cascade operation of cleaning solns, fitting of oil separators and filters; automatic dosing control by pH and conductivity and use of deionized water rinses.

Ultrafiltration in pretreatment for vitreous enamelling

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Emphasises the importance of both filter unit and also cleaner composition. Silicate compositions in particular cause problems, with precipitation blocking the filter membranes. In the case of anionic cleaners, some surfactants are to a large extent retained and must be replaced by topping-up. The importance of preliminary trials is highlighted by these findings.

Ultrafiltration in the automotive industry

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Ultrafiltration in electrocoating is discussed. Equipment for (cathodic) electrocoating, and ultrafiltration membranes for recovery of paint, are indicated.

Ultrafiltration membrane

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Means of forming membrane using sulphone polymer to form membrane with asymmetry ratio at least 20, substantially free from macrovoids.

Ultrafiltration of aqueous wastes from water-borne paint residues

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Ultrafiltration to remove suspended solids from aq. effluents from washing out of water-borne paint residues is described. Variation of characteristics of effluent with treatment time is shown; there is significant fall in COD.

Ultrafiltration of Cathodic Electrodeposition Paints

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Brief theory of title process and details of process loops, graphs of performance & economic benefits.

Ultrafiltration of cathodic electrodeposition paints - Seven years of field experience

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Rapid increase in use of cathodic paints since 1976 was partly triggered by development of improved ultrafiltration technology and adoption of better membranes with special surface charge modified for each specific paint formulation. High flow rate in circulation loop through feed-and-bleed ultrafilter is recommended to ensure high flux flow and to prevent membrane fouling.

Ultrafiltration of products of cataphoretic painting

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Principles of ultrafiltration, advantages of closed loop operation, differences between ultrafiltration with anodic and cathodic electropainting, theory, membrane properties, effect of pretreatments, and future developments are discussed.

Ultrafiltration of silicate containing cleaning solutions

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Suspended SiO2 particles in cleaning soln. and flocculation products can not be removed by ultrafiltration. Improved results have been obtained with cationic surfactant.

Ultrafiltration System for Cathodic Electrocoat Paint Tank

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An alternative flow system is recommended in which used ultrafiltrate returns to the ultrafilter.

Ultrafiltration system for latex paint waste water treatment

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Pilot plant study of ultrafiltration system for treating waste water from latex paint manufacture has been carried out. For plant generating 6000 gal/day, 40 cartridge system would be needed, expensive compared to conventional physico-chemical treatment.

Ultrafiltration to clean oil-contaminated cleaner baths

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Ultrafiltration Treatment of Oil - Water Emulsions

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description of the title method, based on a commercial plant, suggests that variation in the type of emulsion encountered, causes problems.