Document m0jEZbmkeGnKmo7aKX6ynr7J
FOR COMPANY USE ONLY
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OFFICIAL PRnnucT NAME
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TEST AUTHORIZATION NO. TA-C-
Anthraquinone__ Sj^
DATE------ gecembE.....3-/-. J--?.?.? 73-734
PRODUCT CODE NO. 055-S& -'>060POUNDS PRODUCT PROPOSED Up to 27,000 lbs . dry
AREA
"Ponsol"_______________ BUILDING n a me ' Standards TITLESpray drying of anthracuinone.
PREPARED BY:
E. G Leser e.j>. $-*
RESPONSIBLE FOR TEST AND TEST CDNCI USION-
E. G. Leser, A. C. Stein
PURPOSE OF TEST:
To spray dry wet anthraquinone to provide dry product for
export. The product pan dries slowly, and a rapid drying method is desired.
DURATION OF TEST: STANDARD INVOLVED:
If initial spray dried charge meets quality specifications, one entire anthraquinone campaign (27,000 lbs. dry) will be dried.
Operating Instructions for"Ponsol" Spray Dryer.
ANALYTICAL CONTROL: S No change
Change described under Test Details
(OCNB 2829-143)
TECHNICAL BASIS FOR CHANGE:
Successful laboratory spray drying by H- Hopkins (OCNB 3576-46, Jackson Laboratory).
TEST DETAILS: (Include Safety and Waste Disposal)
See attached.
Waste Disposal; None, except for small amounts of anthraquinone lost in equipment clean out.
Safety:i See attached.
DISTRIBUTION: R. J. Pohl R. H. Terss
J. L. Piles C. H. Lake T. E. Lewis J. R. McCloskev APPROVED BY:
R. T. McNally J. A. Moffett M. S. Moores D. O. Miller (3) E. C. Nelson J. A. Oscar
D. Putnam (3) C. J. Slentz . R. F. Stalzer J. F. Laucius E. G. leser
A. C. Stein J. H. Green
CHIEF SUPVR., OPERATIONS
OATE
CH. SUPVR., TECH. Oft PLT. ASSIST.
DATE
DATE
SUPERINTENDENT, ANALYTICAL. (When Required)
AUTHORIZED BY:
OATE
SUPERINTENDENT. OYE QUALITY CONTROL (Winn Req'd) PATE
SUPERINTENDENT, MANUFACTURING (Or Delegate.)
DATE
SUPERINTENDENT, TECHNICAL (If Any)
DATE
Page 2 TA-C--73--734 Anthraquinone
Safety;
Carney's Point explosion data from the one-shot analysis of our first four anthraquinone charges is presented below. All samples except the "as is" one, were dried, ground, and passed through a 200 mesh screen prior to analysis. The data show that anthraquinone is safer than the standard "Duponol" ME or quinizarin and hence can be spray or pan dried.
Anthraquinone Dust Explosion Data (B. W. Ricards)*
Charqe No.
Maximum Explosion .
Pressure Ap,-psi
Maximum Explosion Rate dp/dt
psi/sec.
Average Explosion . Rate dp/dt psi/sec.
1 2 3 4. 4 (as is)
"Duponol" ME Quinizarin SD
67 70 62 " 58 59
95 78
2100 2280 1490 1245 1665
2875 .530.0
.
"1015 1170 885 645 780
1400 2365
*Explosion Hazards Laboratory, Carney's Point Works
Test Details:
1. Charge nutsch cake into a minimum amount^of water with agitation.
Note; Plant nutsch cake is about 30% solids,
2. Add water as needed to achieve a pumpable slurry.
Note: The amount of water to be added will be determined by supervision.
3. If necessary, adjust the pH of the slurry to a range of 5.5 to 7.5 by carefully adding 30% caustic.
Note;
The effect of a pH greater than 7.5 on product quality is not known. At a pH below 5.5, . residual acidity on drying will not adversely effect product quality, but will corrode the spray drying equipment.
Note: Plant nutsch cake will normally have a pH in the range 4.0 to 7.0.
4. Pump the aqueous' slurry through the screen to the feed tank.
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Page 3 TA-C-73-734 Anthraquinone
5. Spray dry the slurry under the following temperature conditions:
Atomizing air Drying Air Mid Chamber
250-300C. 300C. 80-85C.
Note: Optimum temperatures of spray drying will be determined ' by supervision.
Note: Anthraquinone sublimes at 286C.
6. Send an 8 oz. sample of each charge of spray dried anthraquinone
to G.A.b. for the following analyses as per specification No.
54-A-l.
Property
Specification
% % MCB Insolubles
0.2% $ 0.3%
DTA
284.0C.
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