Efficiency and superior product purity
High-quality paints and pigments are used in various sectors, such as the automotive, cosmetics and pharmaceutical industries. In production, rotary pressure filters (type RPF) and indexing belt filters (type BF) support the necessary process steps of filtration, washing and dehumidification in a single system and deliver high product purity.
Typical applications include printer pigments, precursors & intermediates, phthalic acid, phthalocyanines, phthalocyanine pigments, sulfonic acid, mineral pigments, indigoids, AZO dyes, pearlescent pigments, silicate pigments, aniline dyes and anthraquinone dyes.
Filtration at low cake thickness
Filtration at low cake thickness
The dyes and pigments sector has particularly high demands when it comes to process technology. Dyes and pigments are usually difficult to filter but still require efficient and high-quality washing. Therefore, filtration is carried out at a very low cake thickness. Consistent quality is a central requirement for each respective product.
Our continuously operating rotary pressure filters and indexing belt filters offer various options for cake treatment and ensure quality standards at a constant level even for very small cake thicknesses. The filters achieve high throughput rates and excellent wash-out and residual moisture values. In addition, the self-regulating systems require little manual intervention, which is essential especially when processing dyes.
Video
Production of high-quality pearlescent pigments with the rotary pressure filter (RPF)
Production of high-quality pearlescent pigments with the rotary pressure filter (RPF)
BHS-Sonthofen rotary pressure filters have proven themselves in many applications. For example, Merck uses them around the clock to produce pearlescent pigments. Watch the video to find out how BHS filtration solutions give cars and cosmetics a shiny appearance.
Our machines in use
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