7'B» Test
COMPARATIVE RESULTS OF DRYING AIR Relative Positions in Series of Dehydrating Agents During Test*
1st—Activated Alumina 2nd—Calcium chloride 3rd—Sulfuric acid 4th—Phosphorus pentoxide
Gain in Weight Grams 0.0778 —0.001 -?-0.0000 0.0002
iIBk »H £ ]S H '
Hi mm
— °'L °'° 2
1st—Phosphorus pentoxide 2nd—Calcium chloride 3rd—Sulfuric acid 4th—Activated Alumina
0.0764 0.0001 0.0002 0.0014
H
97.8
1st—Sulfuric acid 2nd—Activated Alumina 3rd—Calcium chloride 4th—Phosphorus pentoxide
0.0853 0.0042 0.0001 ±0.0000
S 8 3
95.2 4.7 0.1
9
o.o
1st—Calcium chioride 2nd—Sulfuric acid 3rd—Activated Alumina 4th—Phosphorus pentoxide
0.0698 0.0002 0.0034 ±0.0000
3 1
95.1 0.3
i
°-°
1st—Barium m a g n e s i u m perchlorate 2nd—Phosphorus pentoxide 3rd—Activated Alumina
0.0931 0.0054 0.0042
1
90.2
j I
5.6 4.2
1st—Activated Alumina 2nd—Barium magnesium perchlorate 3rd—Phosphorus pentoxide
0.1061 —0.0017 0.0032
99.0 — 1.6
0.1110 —0.0009 0.0070
94.8 — 0.8
1st—Phosphorus pentoxide 2nd—Barium m a g n e s i u m perchlorate 3rd—Activated Alumina
Iff:
X
K 3g W
*
Moisture Adsorbed % ot lotal
99.9
°-
o.i 0.3 1.8
4.6
2.6
6.C
W£ ^Weight of dehydrating agents employed: "^ Activated Alumina 10.52 grams pj.^ Phosphorus pentoxide 2.50 grams l^J^S Sulfuric acid 7.24 grams 8^$SHl C a l c i u m chloride ,.10.27 grams JS§?$lj& 'r/vH^flSgt Barium magnesium Hou^*&4rT*>. ^ ? ^ ^ * $ ? S f e - Pe^hlorate 18.53 g r a m s J t ^ l ^ ^ ^
This comparison test proves superior adsorptive capacity of A L C O A A C T I V A T E D A L U M I N A Efficiency of a drying agent can be tested by measuring how completely it removes water from a stream of air of given moisture content. The table above shows results of such a test made on a comparative basis with these desiccants: ALCOA® Activated Alumina; phosphorus pentoxide; sulfuric acid (96% C.P.); calcium chloride; and barium magnesium perchlorate. The desiccants were placed in a series of TJ-tubes. High humidity atmospheric air was drawn through the
They are nontoxic, chemically inert to most gases and vapors, and they will not soften, swell or disintegrate when immersed in water. They keep drying costs down because they can be reactivated an almost unlimited number of times with no serious drop in adsorptive efficiency, Whatever you dry . . . gases, liquids or vapors . . . the effective, low cost solution to your drying problems is ALCOA Activated Alumina. Get detailed information
tubes. This was repeated under comparable conditions
today. Write ALUMINUM COMPANY OF AMERICA, CHEM-
for each of the arrangements of desiccants shown in
ICALS DIVISION, 704-C Alcoa Building, Pittsburgh 19, Pa.
the table. Study the test results. The superior performance of
MBSB^
ALCOA Activated Alumina is clear! In laboratory tests . . . as in hundreds of industrial
^WJljBF v ALCOA
drying applications . . . ALCOA Activated Aluminas have p r o v e d t o b e t h e m o s t reliable c o m m e r c i a l d e s i c c a n t s
available. They d r y t o d e w p o i n t s b e l o w m i n u s 100°F.
CHEMICALS"! * ^M.NUMCOM^VO.AM^C*!
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