a d d was determined a< 25.4%.

:\ H-ydrofluosic and Trifluoroacetic A c i d s - Abel and Raiff Details of t h i s work Will be reported in the nexk Progress

Report ,

Conversion of Nitric Acid Solutions to Ztvdrofiuox4c Acid Solutions - B e l l

Gonverdon of production so lu5 . om to hydrafluoric acid 4 scrh%ions was tried by precipitation wi th ammniurn oxalate, slumiplum

a h,ydrord.de, arrmo-dum hydrodde, and sodium carbonate, Silver and )r Teflon d i s c s we= us&.

DETAILED REPOR!P

Solubilities

The solubility measureroents at 2!5.4°C. were made in a w a y sidlar t o that described in t h e Progress Keport of October 1-15, 1947.

kfeasx-ements of the heating effect of the activity 2~ solutions -re made, Table 1 shows t h e data,

Table I H e & b Effect of Postum

DISCLAIMER

This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency themf,.nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or use- fulness of any information, apparatus, product, or process disclosed, or repnsents that its use would not infringe privately owned rights. Reference hnein to any spe- cific comrnerciai product, process, or service by trade name, trademark, maoufac: turer, or otherwise d o e not necessarily constitute or irdpiy its endorsement, raxm- mendation, or favoring by the United States Government or any agency thenof. The views and opinions of authors exprrssed’herein do not necessarily state or reflect those of the United States Government or any agency thenof.

~

r

DISCLAIMER

Portions of this document may be illegible in electronic image products. Images are produced from the best available original document.

-2- UNCIASSIFI ED Electrodepositfan Apgress Repart

The concentration c9 po&um in acid solutions $8 shopon fn Cable 33,

. sa 0*1oW

0,

0,018

.o.m. 0. mo

0.018

0.063 -

0. os6

0.018

- 0,020

0.028

0.020

0.020

- -

- 0.019

0.018

0,269

- 0,128

0 132

0.132

O 0130

O.l@

00 2uc 0e172

0.168 i

U N CLASS1 FI ED

.- -3

Jn3ch&3position Progress Report

The88 data are cshown graphfcrsLly b Fi@lre 1. been noted before, the change in solubility is very rnarked in the higher cozlcentrations, and becomes lees 3.n the more &lute acid dut ione . In the e888 of l e s 5 tJmd and 2.081 nom& ni t r ic a i d solution the change %a so rapid that it is dff f idt t6 errrtrapolatar t o saw t iam. b e k e ~ s r ~ r to recheck the aolubione. The solubil%tlss, a24 obt&ned froa the &rapolat%on, are rrhorpa i n Table XII.

A 8 h a

Before any conclusiaks ar8 drawn it dll

Table III

os1036

0.5046

LOO6

2.081 0,628 ( ?) 26.eoc*

Conversion of i '?i .dc Acid S o l u t h r ~ s t o Eisdrofluo~ic Acid Solutions - B€3U

(1) U s i n g a sintered 8 f i V W filter ( 1/2 inch i n dhimeber) u) a3, of aolution containing 0,0836 units was filtered after precipitation with ammoniwn oxalate. The filtrate was collected and assayed. The precipitate was dissolved in 1.5 N nitric acid and a l r s o assayed. Fifty per os& of the activitg could not be accounted foro but 5s was fouad to have remained undissolved on the filter.

(4) A run simUar t o the p.doue one uas made emept that only am fi2tration 1188 nude*

s UNCLASSIFIED I

0. t

0. e

0.4

0.1

0

. . . . . , : , - i . . . . . . . . . . . L... . .

................. -..~ ......... L ....... . : . . I . . . . . . . .

, .. . I - .... -. . . . . . ..__~ .. . . . . . . . . . ... ........ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1

I -4- W NCLASSI F 1 ED

9. %lectrodeposition Progress Reprt

The results are o o m p l i e d in ?able I V .

Table IV

PredDitat3on of Po&urn in Various Media and pyltmtioa T h r o q Silver aad Teflon Discs

An apparatus 5s being constructed which w i l l permit production solutions to be precipitated, filtered, and t h e precipitate dfsaoltred in hydrofluoric acid, all in a cloaed system. as the filter medfm and t h e producthn aolubions w f l l be precipitated tsim socuUm carbonate solution.

Porous Teflon w i l l be used

Hvdmf1uoA.c Add and Trtfluoroacetic Acid - Abel and Reif f

Work on these auds w i l l be reported on in the next Progr08a aport

Details wnriL1 appear in the next P m p s s Report;.

1. - unit 31J 2. - unit fV 3. - S i t e Y 4. - site Y

L2. - Central F i l e s

UNCLASSiFiED