Document DMDY9D66jajmVRmvjO2aqNw8d
B*F OiilrfA Ckadnl Company
Mb H. E. Barrett
Louisville, tj.
Dm May 19. 1969
J. R. KUte Louisville, Kentucky
of MSA Explosion litter and Rodtaey-Hunt Stripping Data Collected Since 1964____________
The following reports or report sunaerles were gathered out of the Louisville Plant Oeon Latex Technical files. They outline the work done by the Louisville Plant In determining the safe level of vinyl
chloride wononer In Oeoo Latex as well as the data taken for evalu ation of the #k Turbo-Plla Evaporator nade by Rodney-Hunt as a
stripper of VC1 fron Oeon Latex.
The data In Report Ro. 1 was taken in January through March, 1969
using the Akron explosive test, whleh Is run on Ryear type latex,
was run on saeples of bulk shipments of Oeoo Latex. Ro correlation
could be verified between the MSA Explosion Meter and ft VC1 using
the Akron test. One eauee of this Is that no precaution Is taken
to ensure that equlllbriue Is reached. Hie only true way to de-
tcradne if a fives latex at a given tenperature is safe is to
detexulne the $ VC1 vapor in the vapor space above that latex at
that temperature after equlllbriue has been reached, the chromato
graph Is prcbably a better lnstrunsnt for this purpose than an
MSA Explosion aeter. However, the explosive contribution of other
volatile coeponenta Is not detected by chroaetograph. Figure 1 Is
a plot of the explosion aeter ft versus ft residual vinyl chloride.
Report Ro. 2 contains more data showing that explosiveness depends
on other factors then ft TCI aononer in the latex. The data in
Report Ro. 3 shon|ygjet if equilibrium le reached, the explosion
aeter 's at IsaaHBpoduclbl*. The data also suggest that VC1
aononer In
sot according to Henry's Lew.
After the explosio3lt the Arestrong plant In 196k, production and
development people Associated with vinyl chlorlds latlcee began
evaluation of secondary latex strippers to lower the ft VC1 level.
O. D. Scheaf, L. D. Pringle, M. M. Doughty, and I haw performed asny experlnents designed to evaluate the Ro&My-Hunt concentrator for this purpose, 1, J. Lesson worked with the UHT Heater-Modified Cyclone Process la Avon Lake Developaent and his report dated Roweber 16, 196k was vary favorabls as ware Olen Scheaf's report on the Rodeey-Bont. Sontrlfuges ware Installed at Avon Lake General Chemical Plant, however, and they have newr done e good Job of tripping. Presently, R. Kaalnakl, of ALQCP, Is evaluating the effect!wnesa of a aodlfled Pleco unit.
Report Ro. k is a sunnary of the first evaluation of the RodneyHunt concentrator as a Oeon latex stripper. It should be emphasised
that until 1965, all data on ft VC1 is baaed on steaa distillation. A general rule is that ft VC1 by the chromatograph la about 0,l$t higher then the ft VC1 obtained by steaa distillation. Report Ro. 5
le aore data taken by Olen Schaaf. Runt data In Report Ho. 6.
BfQ0449t
C er.
o
-2-
Kite Doughty performd a good experlnent In February, 1968 which
proved that the Rodusy-Bunt could reduce the level of % VC1 to
about 0.050 if it Mil uaed aa a secondary stripper. See Report o. 7. My experlamt perforned in April, 1969 verified Doughty's results. A level of 0.050 TCI is achieved using the Rodney-Hunt as a second stage stripper. Oeon Latex strips beautifully through a RodyBat without any notloeable danage of the latex.
JMCsc*s-9e-69 Attachaentst
Distrlbutlonx
J. L. Malson 1. V. Barrington - 3. CC.^ord Technical Council Central technical Pile 0. L. Mheelook R. L. ^teller M. V, tareo-j R. W. McKay B. Jirouaelc D. B. Heaver L. 0. Crunks.:ton S. 3. Michels F. A. Hagner A. J. Osborne file.
J. R. Kute
20B79002
26112
BFG04492
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Mfrct
20879003
II
REPORT NO. 1
B*F. Gool*lli CLemSco] Con^ony
ito-Or^rmotion Com^poodence
S. S. Michels Louisville, Kentucky
Geon Latex Explosiaeter Testing
April 22, 1969 R. R. Taylor Louisville. Kentucky
V.v i
It m requested toy Seles through oar Technical Department that w check oar Ceon Latex toy the exploeiaeter using the sane procedure m used for Ryear Latex at Akron.* The procedure is:
Appradnatily 150 ML of latex is placed in a 500 ML narrow I'ooth toottle. copped with a rubber stopper consisting of a t'.-.-mcawter* heated to 50C, shaked gently for 3 seconds, sn apped d tested with an explosiaeter.
MR
TOT
BUD
S vex. cnONAIOGRAPX
BIPUOSXMRKR-MBTER RBASUO
1-29-69 1-31 2-1 2-1 2-0 1-29 2-1 2-10 2-lfi 2-18 2-1 3-19 2-T 2-8
13 2-10 2-10 2-20 3-9 2-8 2-26 3-19 2-10 3-18 3-17 k-10
576 576 576 576 576 580X91 580X91 580X91 580X91 580WL ki a&z
3n-. 352 352
-v
352 350X2 Jnn?
580X12 580X12 550X172 550X172 550X172 550X169 652 580X52 580X29
3875 3878 3880 .
3879 388k
256 257 258
259 260 X29 Makeup
762
1085 1086 1089 1087 1088 78 *28
*26 *28
819 827 831 109
3837 52*
293
.09 .05 .11 .10
.11 .15 .18 .18
.16
.11
.25 .18
.IT .25 .20
.19 .17 .53 .10 .12 .10 .10 .12
.08 .12
.32 .12 .11 *
85 80
50 30 50 80 *0 30 60
35 65 20
35 55 35 50
65 100+
65 *5 65 50 32
25 60 100+ *0
85
S. S. Nickels
April 22, 1969
PNt - 2 -
We know that annoois will interfere with the exploslneter reading, therefore, the results srs not rexy asaaiagful for a check for Residual
Piaqrl Chloride.
V,-\ .
R. R. Taylor
cc: P. A. Vsgnsr E. R. Barrett (8)
C. C. Phillips L. D. Pringle
A. i. Osborns
nc.isR. anith
t0 0 6 !5 0 2
BFG04494
20S79005
BFG04495
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o m ao
inqh
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; j... I0r::.;
Figure -No. I
A9*> .GO*
REPORT EO. 2
B.F. GcoJffali Claemlcal Company
mmpwunnn uwopoMon
B. E. Barrett Louisville Plant
Sxploslaeter Test on Geon Latlees
January 10, 1969
J. R. Kute Louisville Plant
Four quart staples of different Geon Latices vere tested to -correlate explosineter readings with Residual VCL levels. Vith each sanple, three pint jars were half filled ad heated to W3-50*C with the cape on. Explosineter readings were then run on the vapor space before
and after the latex was shaken.
Geon 350X21, Blend 0031, ResiduaTVCL - 0.20
Explosiaeter Reading
Portion #1 8 50C. Portion n 8 k5C Portion #3 8 b0
Unshaken Shaken Unshaken Shaken Unshaken
Shaken
100*
70< 90*
0%
w* 20f
Geon 352, Blend 1031. Residual VCL - 0.20
Portion #1 50C ,"
Portion #2 8 b5C -
Portion #3 kOC
Uoshakea Shaken Unshaken Shaken lVihrtti
Shaken
Geon 5T6, Bles* 03056, Residual VCL - 0.l6
100% 70%
100% 80S
35* 65*
Portion fl 8 50C Portion 92 8 *5C iurtion #3 8 *0C
Unshaken Shaken
Shaken Utashaken Shaken
70* 50*
k5* hO%
35* 90*
Geon 580X91 Blend 002b7, Residual VCL - 0.17 '
Portion #1 8 50C Portion 92 8 k5C Portion #3 8 bOC
Unshaken Shaken unshaken Shaken Unshaken Shaken
100* 100* 100*
85* UO* 50*
J. R. Kute
26112JRK:<tab
20679007
B*F* OiiJiIifc Cawnltal Company
< flwwywdnif*
H. 8. Barrett Louisville, Ky.
May 15, 1969
J. R. Kutew Louisville^ Kentucky
Safe Level of Vinyl Chloride Monomer In Geon 351 at 90*F
With the cooperation of Rush Taylor, an experiment was performed to determine a safe level of vinyl chloride monomer In Geo?v351. 1ft results of the test Indicate that the solubility of VC1 In Geon 351 ay be approximated by Henry's Law, and that the presence of extra aannla In the latex was found not to affect the explosiveness of the vapor space.
Samples of 351 containing 0.25* VC1* 0.16* VC1, 0.05* VC1 (pH . 7.5), an<- o.C"< VC1 (extra fi--onla added to bring pH tap to 10.0)were stored in cio:. j beakers for one to seven days at 90*P. MSA Exploslmeter tests were run on the vapor space without having agitated the samples. The results are listed In Table 1.
Table I
MSA Exploslmeter * of 351 Samples at 90*F
Sample
* VCl
Period
Exploslmeter *
1A
0.25 - ' ` 1 day
115+ off scale
IB
3 days
115+ off scale
1C
7 <Jay
115+ off scale
2A
6.16
1 day
100
a
3 day
110
2C
7 days
112
. * 7.5
J
3C
0.05
1 day
3 days 7 days
25 33 32
3D pH 10.0 38
38
0.05
1 day 3 days 7 days
26
39 30
The following points are suggested by the data.
1) Equilibrium Is reached before the third day.
21 0.16* VC1 is Just above the safe level In 351. 3) does not appreciably affect exploslmeter results on
vapor above 351.
.
A) 0.05* VC1 may be safe in 351 at 90 r.
___ .
5) The amount of VC1 in the vapor above the latex is proportional
to the amount of VC1 In the latex. If 100* on the exploslmeter
Is taken as A* VC1 In air, wh^h is the lower explosive limit,
then the equation *VCi m air. 2701 * VC1 in latex
Is roughly correct. Blip equation *s rough cut it points out ti
Henry's law nay apply.
*
BfG04498
#
2
t The data and equation above Indicate that 351 with a residual vinyl chloride level below 0.l4 will be non-explosive at temperatures
, below 90*P.
It is recommended that further evaluations of a safe level of VC1 in latex include a plastic latex, preferably 576, It is also recom mended that a chromatograph be used to measure the VC1 in the vapor
space rather than rely on an exploslmeter.
Description of Test
.
Twelve 250 ml. breakers were filled with 80 ml. of 351 and capped with plastic screw-on caps with paper gaskets. These samples were partially submerged in a water bath and the temperature was controlled at 90*F. After one day, four samples (one of each VC1 or NH^ level)
were tested by measuring tbs explosiveness of the vapor above the latex. The same test was performed on four more samples on the third day and the final four on the seventh day.
J. R. Kute
:--89-69
cc: L. G, Cnmkleton si si Michels P. A. Wagner H. H. Strlby R. R. Taylor T.C. Bolly 0. L. ttimelock - D. E. Weaver R. L. Stellar - P. C. Whitfield file
ta
3
REPORT MO. 4
Report Date 3-26-64 by Q. D. Schaaf Rodney-Hunt feed was 352 from storage tank: T.S. - 56.8, jf VC1*
0.361, Millipore
2.4
Run Rate
Conditions Rotor
Vacuum
T.S.
Results % VCl* Millipore
1 2
3 OFM 110*F. 8 aap 10 OFM no"* 10 aas>
28.7" Hg, 56.0
26.7"
59.3
0.271 0.180
i
10 0PM 120"P 9.5 aap 28.7" Hg. fa 13 OFM 120*F 12 a^p 28.7" Hg.
13 0PM 130*F 12.5 a*> 26.7" Hg.
0.113 00.0:9i0
20 0PM 130*P 15.5 aap 28.7" Hg.
3.6 4.1 2.4
5.1 5.5 5.0
Rcxkiey-Hunt feed
Weathered 332 feed: tIs. . 56.O, % VC1 . 0,970, Millipore -1.5
8 up 12 aap
26.7" Hg. 63.4 26.5" Hg. 60.9 28.5" Hg. 59.2
0.112 0.112
0.112
0.8 0.8
Conclusions:
1) This experiment Indicates that temperature le - driving force In stripping VC1.
2) It aas possible to strip weathered 352 without foam problems, but rate w lla^tad due to rotor load and vibration,
By st*au distillation.
20678010
26112
BfG0450
REPORT MO. 5
Report Date: 4-6-64 by 0. O. Schaaf Rodtaey-Hunt feed was -
351 from storage, T.S. 50.5, % VC1* - 0.316, Mllllpore - 1.5
Conclusions Temperature still looks like the driving force for strip ping.
Other Notest
Two 351 charges were str ipped into the process pot stripper at two
levels of vacuum control. At 20" Qa vacuus, the % VC1 was 0.51$. At 23" Hg vacuum, the % VC1 was 0.39 VC1. This Indicates that
vacuuai level does have considerable effect on stripping.
A sample of 351 was heated to 200*P in 40 minutes, held at 200*F for one hour with agitation and cooled to room temperature in 2 hours and
35 minutes. Use % VC1 dropped from 0.451 to 0.015 while the mllllpore
did not increase.
Productlon started wl peaking all latex charges.
By Steam distillation.
BFG0450l
C C
REPORT NO. 6
Report Date 7-20-64 by L, D. Pringle Rodney-Bunt ree<l was --
351 fro* storage Teed: T.S. = 53.1* % VC1* = 0.18, Coulter
Counter 0.407
Run Rate
Conditions Taep. Rotor
1 2
7.5 cm 7.5 GPU
SS5:
17 14
e*p aep
Vacuum
T.S.
26.7" as. 28.7" as.
Results
% VCl* Mlllipore
0 0.801 0 0.573
CaDelusion: The Rodney-Bunt stripper la effective In removing vinyl chloride n-'nouer.
* By steam distillation.
BFG0^
O <T>
O fs5
REPORT NO. 7
B.F. G*oJrIeli Cliemieal Company
ioa Correspondence
lb H. E. Barrett 'Lecetkm Louisville, Ky
D*te Ffcxa
February 19, 1968
M. M. Doughty Louisville, Ky.
at
Sebjeet vci Stripping Pro* Qeon 351 With a Rodney Hunt
Introduction:
v'" -
In 1964 Geon 351 latex was successfully stripped on No. 2 RcdneyBunt Evaporator In the Louisville Hycar Department. Evaluation
of the Rodney-Hunt for stripping Geon Latex was not pursued at that time because the Sontrifuge appeared to be a better method,
the Avon T-v Plant now states that the Sontrifuge is
.fective, It Is desired to activate the evaluation of a
Rodney-Hunt for stripping VC1 from Geon Latex.
Seen 351 was stripped from 0.26 to 0.040 Vinyl Chloride on January 17, 1968 on No. 2 Rodbey-Hunt Evaporator (a No, 4} In the
Hycar Department with jacket temperatures from 110 to 170T* at 300 gallon* per hour feed rate. Latex used bad been recovered In
normal recovery strippers of Bldg. 121.
Conclusions:
The Rodney-Hunt Evaporator decreased residual VC1 from 0.26 to 0.040 (chromatograph) with an Increase in coagulum from 0 to 0.60 greater than 0.45 u by Killipore Filter. Particle size by Electron Microscope showed no significant differences for the control (.260 VC1) and latex stripped at Jacket temperatures of 130 and 150*?.
Recommendation:
Continue investigation of the Rodney- Hunt Concentrator as secondary following Initial recovery stripping. Evaluation can
.1*11 1, 1968 after a second paste concentrator has becoat operational.
Discussion:
t
Geon 351* stripped to 0.260 VC1 In B-121, by normal recovery, was further stripped on No. 2 Rodney-HUnt Evaporator In the Hycar Depart ment. Residual VC1 was reduced to 0.040, The evaluation was carried out In two aeries. The first series consisted of 130, 140, and 150*F Jacket teaperaturea, and the second consisted of Jacket temperatures of HO, 140, 160, and 170*F. Mllllpore Filter on the first series Increased from O to 3.80. Although no reason has been found for the higher Mllllpore Filter data on the first samples, neither 0,6 nor 3.80 is considered high for Geon 351.
26112 I
BG04503
C.5
r
H, 8. Barrett February 19, 1966
-e-
< Prior to stripping, the latex was diluted to 49,75* and alkalinity was raised to 0,198 bjr addition of ammonia. Total solids of the concentrated product varied from 93.3 to 59,]jf and alkalinity froa 0,08 to 0.108.
The maximum rate attained was 300 gallons per hour; 600 gallons per hour had been expected on this Rodney-Bunt (a Ho. 4), The oause of this reduced rate was heavy foam.
The Rodney-Bunt vacuum dropped froa 26.7 In, Hg to 2Q.0 in Hg. as
Jacket temperature was Increased froa 110 to 170*F, With no foaa carry over and only about 7 IBs, per hour of non oondensablea (VCl)
the c' ~z9 In vacuum Is unexplained. Bowaver, the 28 In. Bs vacuum
caused no particular problems.
Acknowledgement
I would like to thank Lowell Qrady for his cooperation in this evaluation.
M, N. Doughty
^.^M.wutlont
L. 0, Grunkletoo S, S. Michels p. A. Vagner A. J. Osborne I, L. Beeler M, D. Asssra L. A, Qrady Q. L. Vbselook R. L. Steller V, A. Scfelng S. C. Oer4"
nOKaj1
... Kaminski file
- -I*
20679014
b?g0454
JVTORY DATA
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REPORT NO. 8
Evaluation of tftft Rodney-Bunt Concentrator as a stripper Cate: 4/21/69 and 4/23/69
Peed Latex: 351 from storage, T.S. 55.6, % VC1* - 0.16,
NLlllpore 1.0
T.S.
50. 50.2* 50.?* 50.2* 50.2*
r
*7%
Rate
Conditions Tnb. Vacuua
T.S.
390 OPH 480 ora 510 ora
3*o ora
560 ore
7'J ora
7&> H 240 ora 420 ora 600 ora 760 ora
110*P 130*P 150*P. U0*P. no *p
15o*f 170 *P
i3py
150*r 1505 190*P
________
29" m 55.8 *9m ft
^9" Hi
.7" He 2B.9" * 28.8" OB 28.8" Ife 28.6" I* 53.0
Snec.Or.
1.15 1.185 1.190 1.183 '.175 -.180 1.183 1.185 1.175 1.17 1.167
Results ** * VC1* Mllllpore
.07 0.06 'J.07 0.06
0.05
0.4
0.4 0.4
0.4
By Cfcroaatograpb
tt Bo son tests acre run because of tbs lack of difference in data aboun. **
20679017
26112
BFG045(y7
r
