ROCKY Bentonite Bleaching Earth

The word of Bentonite was introduced firstly on 1898 by Knight. At that time, Bentonite was used to call a mineral rock that found in Benton Shale, Wyoming, USA. O’ Driscoll (1988) informed that Bentonite is a clay which consist of some essential minerals from smectite. Most of minerals in bentonite are montmorilonite, which have general formula :

(Na.Ca)_0.33 (Al,Mg)₂Si₄O₁₀(OH).nH₂O

The others minerals which could be found in bentonite in small content are chrystobalite, biotite, chalcedony, calcite, analcyte, pyrite, dolomite and plagioclase.

Product Summary

There are two kinds of bentonite, Na-Bentonite and Ca-Bentonite. The Na-Bentonite could expand its volume when mixed with water, it is used for oil and gas drilling mud. And the Ca-Bentonite is used as bleaching agent in cooking oil industries, bleaching agent in lubricant oil recycling, as catalyst, absorber, filler etc. The Ca-Bentonite in general trading is usually called as bleaching earth, fuller’s earth, bleaching clay, taylorite or soapy clay.

 

How the ROCKY bentonite bleaching earth does work ?

 

The ROCKY bleaching earth works based on its character of adsorption and ion exchange. The adsorption process is influenced by some factors as follow :

· particle size

· adsorbent polarity

· surface area

· pore volume

· pore size.

 

All of the factors mainly are influenced by  the raw material selection and the processing technology. In producing our ROCKY bleaching earth, we select the raw material strictly and by our processing technology, the ROCKY bleaching earth is activated by heating and acid treatment to multiply the ability from its natural performance. To make an optimal performance, the material is grinded to find an ideal particle size distribution around 100 – 325 mesh.

 

STANDARD QUALITY OF COOKING OIL

 

1. Water content	max	0.30%
2. Peroxide number	max	1.0 mg/ 100 gr
3. Free fatty acid	max	0.30%
4. Dangerous metals
(Pb, Cu, Zn, As)	negative
5. colour, odor, smell	normal
6. Transmittance	8.50%

 

Oil Refinery

Contact us :

pt NUSAGRI

Nusantara Agritech