BASIC CHEMICALS
Sulfan*
FOR AMERICAN INDUSTRY
General Chemical Company—America's pioneer with the Contact Process for manufacture of high strength sulfuric acid and oleum—makes another major contribution to Basic Chemicals for American Industry with S U L F A N . . . Anhydride of Sulfuric Acid. By perfecting new methods of stabilizing Sulfur Trioxide, General Chemical Research takes an invaluable chemical tool off the shelf of laboratory curiosities and brings it to the Process Industries as a chemical of commerce for use in a host of ways. General Chemical offers S U L F A N in three chemically equivalent forms: Sulfan 'A' P a r t i a l l y S t a b i l i z e d , m e l t i n g at approx. 35°C; Sulfan 'B' Completely Stabilized, melting at approx. 17 °C; and Sulfan 'C' Unstabilized.
Experimental samples and further technical information are available on request from General Chemical Company, Research and Development Division, 40 Rector Street, New York 6, Ν. Υ.
Some Potential Uses 1. For fortification of spent oleum, making possible a ready supply of any strength oleum. 2 . In benzenoid sulfonations for elimination of mixed sulfonates : meta- only or ortho- and para- derivatives only are formed. 3 . For di- and poly-sulfonations of aryl com pounds. 4 . For direct sulfonation of aliphatics. 5. For sulfonations in the presence of a sol vent, thus eliminating the removal of H 2 S 0 4 necessary when oleum is the agent. 6 . For formation of addition compounds with amines, valuable in organic synthesis.
Sulfuric Anhydride exists in three chemically equivalent physical modifications as indicated by data below. General Chemical's stabilized product is almost entirely Gamma-Form and its partially stabilized product is largely Beta-Form.
PROPERTY
GAMMA-FORM
BETA-FORM
ALPHA-FORM
Ice-Like
Asbestos-Like
Asbestos-Like
Description Equilibrium Melting Point ( ° C ) : Density (20° C) Sp. Ht. (cals/gm) (20°C) Ht. of Fusion (cals/mol) Ht. of Sublimation (cals/mol) Ht. of Dilution (cals/mol) V a p o r Pressure (mm.) 0°C 25 50 75
G E N E R A L 40
16.8 1.9255 0.77 1.800 11.900 40.340 45 433 950 3.000
62.3
32.5
— — 2.900
— —
6.200 16.300
13.000
—
—
32 344 950 3.000
5.8 73 650 3.000
C H E M I C A L
RECTOR
STREET, N E W YORK
C O M P A N Y 6,
Ν. Υ.
Sales and Technical Service Offices in p r i n c i p a l c i t i e s from coast to coast *Trade Mark» General Chemical Company
