CHOOSE THE GRADE OF DARCO THAT'S BEST FOR YOUR APPLICATION
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MKMM DARCO DEPARTMENT · ATLAS POWDER COMPANY Darco General Sales Offices—60 EAST 42nd STREET, NEW YORK 17, Ν. Υ. ATLAS POWDER COMPANY, CANADA, LTD., BRANTFORD, CANADA CHOOSE THE GRADE OF DARCO THAT'S BEST FOR YOUR APPLICATION Sample cans of Darco for your laboratory tests Every problem of purifying, de- colorizing or deodorizing by means of Darco activated carbon presents its own individual requirements. To take care of these varied appli- cations, a total of twelve different grades of Darco have been devel- oped. Seven of these are powder; five are granular carbon. The various grades of Darco differ in type of activation, particle size, and secondary physical properties. To match these variables with the variables presented by a particular application is a rather complex process. How, then, dp you select the most effective grade? If ypïi let us know some of the vital facts about your job, we can gener- ally riarrpyyv the choice down __to two or three grades •. Soecifically, the» information that is needed to make the choice falls into these classifications: Liquor; is it aqueous or non- aqueous; liquid or solid at room temperature; pH; boiling point; viscosity; affpctecLJby heating? Impurity: nature and amount? Application: decolorizing, deodor- izing, or general purification? Send us this information, and we'll mail you free samples of several grades of Darco. The optimum grade, minimum dosage and best treatment conditions are then de- termined by simple tests-in your laboratory. For a brief description of evalua- tion methods, write fôy a copy of the booklet, "& Ways to. Get The Most From £)krco," Darco activated carbon is made from materials of vegetable origin Activated carbon can be made from prac- tically any material that has a high car- bonaceous content. Darco activated carbon, however, is en- tirely vegetable in origin. Much of it is made from Texas lignite, which the Ger- mans know as brown coal. Some grades are derived from wood sawdust. Darco G-60, the premium-purity grade, is manufac- tured frpm high quality wood" charcoal. The activation process used for making Darco consists of heating to high tem- perature under mild oxidizing conditions. Following this, all extractable contami- nants are thoroughly removed by succes- sive washing in acids and water. DAfcCO'S low retention saves valuable product Any activated carbon used for purification will hold back some of the liquor being processed. The amount of liquor that stays in the filter cake can represent a sizeable economic loss. When dealing with phar- maceuticals, edible oils and chemicals which have a high cost per pound, it pays to choose a carbon that provides the min- imum retention loss. Darco G-60 is recommended for applica- tions where retention loss can prove costly. Because it often holds back only half as much product in the cake as other carbons, Darco G-60 frequently pays for itself in greater yield at the filter press. If you ? re purifying valuable, product,* we suggest that you send for a sample of Darco G-60. Test it thoroughly in your own laboratory. Compare its retention against any other carbon. You'll probably find that this premium grade will prove the most economical for your application. 2950 CHEMICAL AND ENGINEERING NEWS
Transcript of CHOOSE THE GRADE OF DARCO THAT'S BEST FOR YOUR APPLICATION
MKMM D A R C O D E P A R T M E N T · ATLAS POWDER C O M P A N Y Darco General Sales Offices—60 EAST 42nd STREET, NEW YORK 17, Ν. Υ. ATLAS POWDER C O M P A N Y , C A N A D A , LTD., B R A N T F O R D , C A N A D A
CHOOSE THE GRADE OF DARCO THAT'S BEST
FOR YOUR APPLICATION
Sample cans of Darco for your laboratory tests
Every problem of purifying, decolorizing or deodorizing by means of Darco activated carbon presents its own individual requirements. To take care of these varied applications, a total of twelve different grades of Darco have been developed. Seven of these are powder; five are granular carbon. The various grades of Darco differ in type of activation, particle size, and secondary physical properties. To match these variables with the variables presented by a particular application is a rather complex process. How, then, dp you select the most effective grade? If ypïi let us know some of the vital facts about your job, we can generally riarrpyyv the choice down __to two or three grades •. Soecifically,
the» information that is needed to make the choice falls into these classifications:
Liquor; is i t a q u e o u s or n o n aqueous; liquid or solid a t room temperature; p H ; boiling point; viscosity; affpctecLJby heating?
Impurity: nature and amount?
Application: decolorizing, deodorizing, or general purification?
Send us this information, and we'll mail you free samples of several grades of Darco. The optimum grade, minimum dosage and best treatment conditions are then determined by simple tests-in your laboratory.
For a brief description of evaluation methods, write fôy a copy of the booklet, "& Ways to. Get The Most From £)krco,"
Darco activated carbon is made from materials of vegetable origin
Activated carbon can be made from practically any material tha t has a high carbonaceous content.
Darco activated carbon, however, is entirely vegetable in origin. Much of it is made from Texas lignite, which the Germans know as brown coal. Some grades are derived from wood sawdust. Darco G-60, the premium-purity grade, is manufactured frpm high quality wood" charcoal.
The activation process used for making Darco consists of heating to high temperature under mild oxidizing conditions. Following this, all extractable contaminants are thoroughly removed by successive washing in acids and water.
DAfcCO'S low retention saves valuable product Any activated carbon used for purification will hold back some of the liquor being processed. The amount of liquor tha t stays in the filter cake can represent a sizeable economic loss. When dealing with pharmaceuticals, edible oils and chemicals which have a high cost per pound, it pays to choose a carbon tha t provides the minimum retention loss.
Darco G-60 is recommended for applications where retention loss can prove costly. Because it often holds back only half as much product in the cake as other carbons, Darco G-60 frequently pays for itself in greater yield a t the filter press.
If you?re purifying valuable, product,* we suggest t ha t you send for a sample of Darco G-60. Test i t thoroughly in your own laboratory. Compare its retention against any other carbon. You'll probably find tha t this premium grade will prove the most economical for your application.
2950 C H E M I C A L A N D E N G I N E E R I N G N E W S
