Ultraviolet Spectrophotometric Determination of Uranium - Analytical

Spectrophotometric study of the complexation reaction between uranium/VI/ and one semicarbazone /SAS/. P. L. López de Alba , E. Ramírez Oliva. Journ...
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IV shows the results obtained with two synthetic samples blended from Phillips Petroleum Co. Research Grade hydrocarbons. The accuracy of the analysis is about iO.5%. Several plant samples were analyzed for either n-paraffins or the sum of

n-paraffins and n-olefins. The analytical results for some of these samples, given in Table V, again show a precision of about *0.5~o. The n-paraffin plus n-olefin results for the platformate fraction and the n-decane concentrate could be considered approximate n~~

Table 111.

Analysis of Synthetic Samples for n-Paraffins

Components Blended: Toluene Benzene AIethylcyclohexane 2,2,i-Trimethylpentane 2-Mcthylpentane n-Hesane n-Heptane n-Octane Found: n-Paraffin

Platformate

Weight % Light Gasoplatline formate

9.80

44,79

35.06

...

0.67

35.53 li:28

19.77 30 27

5.10 29.98 10.25

95.32 1.55 0.10 ...

Charge 3.07 90:i9 ...

32 i t 21 83

2.02

3.53

14 I10

. .

1.01

2.81

15 17

21 81

1 28 1 28

2.81

10:01

15 OT 14 98 dv. 15 02

Table IV.

...

Heavy platformate

10 08 10 28 10 18

14 89 15 03

21 86

21 84

1 28

...

2.97 2 89

Analysis of Synthetic Samples for n-Paraffins Plus n-Olefins, n-Paraffins, and n-Olefins ___ Sample 1, Wt cc

H y d ocarbon ~

Blended

Toluene \lrthvlcycloIieuane (‘1-clohexane 2.2,4-Trimethidpentane n - Heptane 1-Hexene Total n-heptane I-hexene

34 60 15 27

+

13 84 18 35 17 94

36 29

Table V.

Sample Platformer charge Platformer charge Platformate fraction n-Dccxne roncentrate

Found

18 78, 18 77

18 02 36 67,36 04

Sample 2, Wt 7 Blended Found 11 46 41 25 10 S i 22 91 8 97 8 99, 9 22 4 54

13 51

4 44

13 61,13 46

Analysis o f Plant Samples

Boiling Range, ’ F. 251 to 394 2j2 t o 381 115 t o 180 331 to 345

+

n-Paraffin n-Olefin, Kt. 5

ACKNOWLEDGMENT

The authors wish to e x p r w their appreciation t o H. J. Hepp and coworkers for the helpful discussions. and t o Phillips Petroleum Co. for making publication of this paper 1)ossihle.

~~~

Platformer charge

parafin values. This appro\inintion valid because the total olefin contents of these samples were 0.5 and 2.3 volume % respectively.

n-Paraffin, n-t. % 22 6,22 2 21 7 , 2 1 8

23 9 3 , 2 4 06 7 5 33,76 37, i 5 68

LITERATURE CITED

(1) Barrer, R. AI., Belchetz, I., J . SOC. Chenz. Znd. 64, 131-3 (1945). (2) Barrer, R. AI,, Ibbitson, D. A , , Trans. Faradau SOC.40, 195-206

(1944). (3) Domask, IT. G., Kobe, I