Pouring cool sample of sodium dispersed in high flash point medium illus trates ease of handling. Samples are available for initial investigations.
FIGURE il One type of pilot plant dispersion unit
HOW
TO MAKE 30D!Uf¥i
W i t h the development of sodium d i s p e r s i o n s , t h e v a l u e of m e t a l l i c sodium as a reaction tool on a com mercial scale h a s been multiplied m a n y times over. W h i l e sodium bricks and molten s o d i u m have been used for years in the manufacture of materials
FIGURE I One type of laboratory dispersion unit.
VOLUME
3 3, N O .
13 ·
·
·
OISPERSIOUS
s u c h as sodium methylate a n d fatty alcohols, the high reactivity and ease of control inherent in dispersions per mits a vast broadening of practical sodium applications. T o test t h e l a b o r a t o r y o r p i l o t p l a n t v a l u e of sodium dispersions in y o u r process is a simple matter requir ing little or no investment i n equip ment. For example, Figure I shows a simple laboratory unit consisting of a creased flask, a special high-speed stirrer, nitrogen purge lines, reflux condenser and addition funnel. Fif teen minutes mixing at 105° C. is gen erally sufficient t o produce good dispersions containing 5 0 % sodium with particles averaging 1 0 t o 2 0 microns. Subsequent reactions may be carried out in the same equipment, giving high yields under easily con trolled conditions. Figure I I shows a 15 gallon pilot plant dispersion unit which handles 2 0 to 5 0 pounds of sodium. Modified ver sions for handling smaller quantities a r e easily fabricated. The method of preparation and mixing t i m e is quite similar to the laboratory equipment, a n d the c h a r g e c o n s i s t s of b r i c k sodium or molten sodium from a melt t a n k . Units up to 500 gallon capacity h a v e been put into operation. O u r technical service p e o p l e
MARCH
2 8,
1955
will be glad t o w o r k with you on modifications of equipment already available in your laboratory o r pilot plant, and will supply complete infor mation on dispersion p r e p a r a t i o n and use. In addition, -we offer a booklet, "Sodium Dispersions", which tells you how to make and use these dis persions in many reactions, such a s : ~->» Claisen Condensations. —>• Wurtz type reactions. —>• Preparation of sodium aleoholates. —>• Purifications. —>» —>—> —>
Preparation of organo-sodium compounds. Metalatlons. Replacement of active hydrogen by sodium. Polymerizations.
Metallic sodium is manufactured by National Distillers Chemical Co., a t Ashtabula, Ohio, and sold b y U. S. Industrial Chemicals Co. ( b o t h divi sions of National Distillers P r o d u c t s Corp.) 9 9 Park Avenue, New York 16, Ν. Υ. Branches in all principal cities. *$**.&*·:&
Î--5
"\ I PleaseΓ sénil'rnëÎ your tiooklètf "SODIUM f DlS^y IfRÉRSiolfë^Mrn!^^
pu 'MÊÊÊÈÈÈÊ
U S INDUSTRIAL CHEMICALS CO. 1315
