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PHYSICAL
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PROPERTIES
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Thermal Conductivity, Λ , ' ' *al./*m./scj.cm./»oc.
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TANK CARS . . . 8 0 , 0 0 0 |bs. n e t
DRUMS . . . 2 8 0 or 2 9 0 lbs. n e t c o n t a i n i n g 1 , 1V2, 5 o r Λ l'A l b . Bricks
Important reagent for reduction, polymerization, con densation, hydrogénation, and dehalogenatîon reactions T h i s h i g h l y reactive chemical can b e u s e d i n a wide variety of industrial proce s s e s . D e s p i t e its m a r k e d r e a c t i v i t y , it c a n h e h a n d l e d without difficulty a n d i t s reactions c a n be readily controlled. S o d i u m can also be c o n v e r t e d i n t o c o n c e n t r a t e d (40-60%) dispersions in inert m e d i a . These dispersions can h e h a n d l e d in p i p e s as fluids at r o o m temperature. T h e y allow rapid but controlled s o d i u m reactions.
Industrial Uses and Applications DYESTUFFS. S y n t h e t i c i n d i g o , c e r t a i n s e l e n i u m colors, and m a n y d y e interm e d i a t e s require sodium in their m a n u f a c t u r e . N a p h t h a l e n e used b y t h e d y e stuffs i n d u s t r y is refined w i t h s o d i u m . PHARMACEUTICALS. Barbituric acid der i v a t i v e s , such as Luminal, Veronal, and m a n y o t h e r soporifics of similar t y p e , are m a d e w i t h sodium. S o d i u m i s also used t o refine m a n y organic liquids used b y t h e pharmaceutical industry.
MISCELLANEOUS CHEMICALS. D e t e r g e n t s , w e t t i n g a g e n t s , plasticizers, resins and insecticides m a y b e manufactured w i t h s o d i u m . T h e p e r f u m e industry uses sodiu m for s y n t h e s i z i n g odoriferous materials and for refining organic liquids. PREPARATION OF SODIUM DERIVATIVES. S o d i u m h y d r i d e , s o d a m i d e , sodium alkoxides and s o d i u m acetylide are m a d e from s o d i u m . PREPARATION OF SODIUM ALLOYS. All o y s o f s o d i u m w i t h mercury, lead, t i n , zinc, c a d m i u m a n d other non-ferrous rnetals c a n b e easily prepared. I n t h e c h e m i c a l i n d u s t r y s o m e of these alloys are u s e d as c o n v e n i e n t forms in w h i c h t o feed specific a m o u n t s of sodium t o a reaction. Pulverized sodium-lead is reacted w i t h e t h y l chloride in t h e m a n u facture of l e a d t e t r a e t h y l . T h e alloys are also used in m e t a l l u r g y . METALLURGY. S o d i u m is used for t h e rem o v a l of a n t i m o n y and arsenic from l e a d - t i n a l l o y s ; it forms c o m p o u n d s w i t h
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TH.INGS F O R
VOLUME
2 8,
BETTER
NO.
L I V I N Q . . . THROUGH
22 » » » » MAY
* * :ΓΑΙ b°cr;V.^ · ·* — Α Μ » ; ^ M Spécule H«at: Solid, a t O ° C . . 0.2930 :..^t97.«°C; ΐ .0.32Ô© SpecificHoot: Liquid, A t 97.6°C. 0.334 Heat of Vaporisation, c a l . / g . , Hoot of Fusion, cal./g ..27.21 Critical Temperature . . . . . . . 2 0 0 0 0 C Critical Prossuro , . .343atm.
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m a n y o t h e r non-ferrous m e t a l s and m a y , in certain cases, b e used a s a refining reagent t o r e m o v e t h e s e m e t a l s as i m p u r i ties a n d t o deoxidize m e t a l s . S o d i u m t r e a t e d steel h a s greatly i m p r o v e d i m p a c t strength a t sub-zero t e m p e r a t u r e s . T h e w e t t i n g p o w e r and fluidity of m o l t e n m e t a l s is increased b y s m a l l a d d i t i o n s of sodium—effects w h i c h are i m p o r t a n t in a p p l y i n g h o t - d i p c o a t i n g s and i n prod u c i n g s o u n d castings. F u s e d caustic soda b a t h s c o n t a i n i n g small percentages of s o d i u m h y d r i d e , formed in place b y s o d i u m a n d h y d r o g e n additions, have remarkable reducing properties. One commercial application of caustic soda-sodium h y d r i d e b a t h s includes descaling and d e s a n d i n g ferrous and non-ferrous alloys i n p r o d u c i n g a n d fabricating m i l l s . I n v e s t i g a t e t h e possibilities of u s i n g this v a l u a b l e , versatile e l e m e n t for y o u r d e v e l o p m e n t and process w:>rk i n t h e future. F o r further d e t a i l s send t h e coupon below.
E. I. du Pont de Nemours & Co. (Inc.) Electrochemicals Dept., Wilmington 98, Delaware Please send me information about Du Pont Metallic Sodium for use in making Name ,
DU PONT ELECTROCHEMICALS BETTER
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Position
Firm Address.
CHEMISTRY
2 9,
1950
1797
