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Chill Haze Removal & Stabilization

The solution is clear

Chill Haze Removal for Distilled Spirits

Distilled spirits, especially brown spirits, contain substances like fusel oils, proteins, terpenes, essential oils, polysaccharides, and pectin, as well as fatty acids and their esters that cause turbidity when the distillates are chilled. To ensure reduction of these colloidal substances, it is important to cool the distillates prior to filtration. At low temperatures these substances become less soluble making them easier to remove.  


While fatty acid esters will cause haze, they also have an important effect on the sensory characteristics of the spirits. It’s a balancing act to selectively remove the longer chain acid esters which are associated with unwanted flavors while maintaining the short chain fatty acid esters that are associated with the aroma components. 


While mechanical removal plays a role, adsorption is the major mechanism in this filtration step, making filter sheet-based technologies an ideal solution. Seitz® K series and IR Series (ion reduced) filters sheets combine surface and depth filtration with adsorption. With a specific selection of media grades, the filter sheets offer spirits producers flexibility when distilling or packaging multiple products.


Pall’s SUPRApak™ module is a revolutionary product that utilizes depth filter sheet media in a unique flow configuration. Multiple layers are wrapped around a central permeable core to provide a compact circuit of high-quality filter sheet material in an easy-to-change module. Advantages of the SUPRApak module include ease-of-handling, no drip losses, and increased process safety, all of which help reduce operational costs. With its large filtration area per module, there is a low capital investment cost when compared to classical plate and frame designs.


For small production batches like single-barrel bourbon, Pall’s SUPRAdisc™ II filters provide an alternative to standard sheets or traditional lenticular modules. The unique Inside-Outside Separator technology provides robust mechanical strength for consistent and reliable performance with the capability to tolerate reverse or pulsed flow and backflush regeneration for long service life.