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Bleaching Earth

T

Telescopic

New member
Absolute Extracts out of AZ recommended this as an alternative to a Buchner setup.

Info pulled from BASF's website...
Purification of Oils and Bleaching Earths

Vegetable oils contain color body impurities like carotenes and chlorophyll that require removal for optimum oil quality. Crop harvesting conditions can result in wide variations of impurity levels. Good quality bleaching earths will effectively remove these color bodies and other impurities like soaps, phospholipids, oxidation products and metals. This results in improved appearance and flavor. BASF’s bleaching earths are produced from bentonite ore containing montmorillonite. Special care is taken during the manufacturing process to ensure consistent product quality. This includes the degree of acid activation, washing, drying and particle size control.


  • - Highest activity (lowest clay dosage) combined with optimal performance consistency
  • - High surface area
  • - Optimum porosity, bleaching activity and filterability
 
Rickys bong

Rickys bong

Member
Veteran
This would be similar to using activated carbon, but bentonite or DE filters are not really suited for filtering oil imho.

A Buchner / vacuum filter is primary filtration.

RB
 
T

Telescopic

New member
Thanks for the input, but i think we are going to investigate it further. We hope to get just enough filtration by passing oil over the bleaching earth inline in our closed loop system in order to eliminate any secondary filtration. Our overall goal is to be able to get a clean extraction in the system so it can be pre-purged instead of having to open the system up with cold solution inside.
 
N

nakadashi

Member
Telescopic said:
Thanks for the input, but i think we are going to investigate it further. We hope to get just enough filtration by passing oil over the bleaching earth inline in our closed loop system in order to eliminate any secondary filtration. Our overall goal is to be able to get a clean extraction in the system so it can be pre-purged instead of having to open the system up with cold solution inside.
Click to expand...
Whoa, can you spare a few details on the hardware you are using to incorporate bleaching earth in your system? Thanks.
 
N

nakadashi

Member
Telescopic said:
Absolute Extracts out of AZ recommended this as an alternative to a Buchner setup.

Info pulled from BASF's website...
Purification of Oils and Bleaching Earths

Vegetable oils contain color body impurities like carotenes and chlorophyll that require removal for optimum oil quality. Crop harvesting conditions can result in wide variations of impurity levels. Good quality bleaching earths will effectively remove these color bodies and other impurities like soaps, phospholipids, oxidation products and metals. This results in improved appearance and flavor. BASF’s bleaching earths are produced from bentonite ore containing montmorillonite. Special care is taken during the manufacturing process to ensure consistent product quality. This includes the degree of acid activation, washing, drying and particle size control.


  • - Highest activity (lowest clay dosage) combined with optimal performance consistency
  • - High surface area
  • - Optimum porosity, bleaching activity and filterability
Click to expand...


Benotite seems promising - wikipedia says "Bentonites are used for decolorizing various mineral, vegetable and animal oils. They are also used for clarifying wines, liquors, ciders, beer, vinegar and others.[2]
Bentonite has the property of adsorbing relatively large amounts of protein molecules from aqueous solutions. Consequently bentonite is uniquely useful in the process of winemaking, where it is used to remove excessive amounts of protein from white wines. Were it not for this use of bentonite, many or most white wines would precipitate undesirable flocculent clouds or hazes upon exposure to warmer temperatures, as these proteins denature. It also has the incidental use of inducing more rapid clarification of both red and white wines."

Def wouldn't hurt to try :D
 
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