Document x5K7E7p59rJyQ21opmgj9vdvG

E. I. DU PONT DE NEMOURS & COMPANY KREBS PICMENTS DEPARTMENT 256 VANDERPOOL STREET NEWARK. NEW JERSEY Numerical File NEWARK PLANT PIGMENT COLOR RESEARCH REPORT Final Report TITLE: LIGHT CHROME ORANGE, GOAL YIELD - C PROCESS. Period Covered: OCTOBER-NOVEMBER 1940 FILE: DATE: 211,2 12-10-48 Njan N42175 ........... ' ---------------- -------- Copy to* #1 * Huaarlool Filo 8 * ROSOOOOb OffioO (8X1*8) 3 * Ltt**a*y FIX# (811*8) 4 * #10 Buildiiig Filo 8 - V. Cholupskl * Float Filoo 6 - w* f * Spongonta 7 *> Sxtaii 8#*iX Ho* EH-48-28 Copy So* / * HEWASK FMHT pio k bs t c o l o r r es ear c h r epo r t Final Rapoyt Tifclaj LIGHT CHROME 0RA3SCE* GOAL YIBID - C PROCESS* Poriod CovoyoAt OCTOBM-HOYBMBIR 1848 Chargai 1180-11*8 (A-IO-2) SUBMITTED BY* AFEROVED BY| DATE SUBMITTED* um*m ATE ISSUED* 12-10-48 DUP050067063 completed recently on the restandardiaation of at a higher level of tinting strength a* an offering Caloo's Ghroaft Orange 40-5460* The new standard# a tl* plant batches 1$ lot 08176* Since thsaanufac ' differs somewhat from the present ("B") process ^st difference in analytical composition would bo eapeeted bbo obangoaD tbo froduotion Division requested that a goal yield bo established tm tbo new process* wmmjLSsmmsm The previous goal yield of 6081 lbs* (per 4806 PbO# TBL) given In tbo *B" process fer Y0-263-D la baaed on synthetlo work eerried out in 18S6 end reported in KH-S6-284 (Ref* 2, 4) While vfchs precision of tho results obtalnod at that tins was good# It is believed that the synthetlo procedure ie subject to greater orrer than the M^ytloal^th^ ^ed^in^^i^oaont study* ^By^th^ Weight of PbO used ,, ui Analyses were run m both tho new standard lot (88176) and on the old standard (30-48298) to oo&are tha yields on the two prowesses end to obtain an analytical goal yiold figuro for aomparteon with the old figure based on laboratory synthesis* Mean values ere Shown below< Y0-263-D, 80*48288 YO-263-d J lot 88178 gf| lS- Ho noro then a trace of moisture (toluene distillation) was found in wither sample* The figures therefore represent both *aa le* end "anhydrous* goal yields* As In ths esse of tho dark orange Y0*S8*D (Ref* 31 the analytical procedure gave a figure about % higher then that obtained by the synthetlo nethod* A direot comparison was hade only in the ease of the old standard* Both methods are subject to cortain errors (Ref* 8) but in the ease of products ss in* soluble as throne orange, the enelftioel siethod is believed te a in reliable satinets of tho weight of pigment actually f^jgjgjjv DUP050067064 Tibi# I gives the actu__a_l_a_nlyaltical _r_e_s_u__lt_s__o_b_t_a_in__e_d la the present study. An estimate of the prsolsioa of the method calculated from previous work (Ref. 5} gives the following pressed as pound yield* standard Deviation of single Stanted Deviation of Mean Degrees of Freedom 85 lbs. hi :..p TABLE I. 0^263^ 815-48206 Tree# YO-263, lot 88176 ("C Process) n 70.60 70.07 GO .34 80,26 651653*53) tIhtse** 6148.6) gfcS! *6118*6} aa&iim 5155 Ibi* 6U8 lbs* 1. Research Report 831-38*292 (S.W.Runt>el) on Analysis of Belbasio lead Liquor* 2* Reasoroh Report KS*33*884 (B*C*Mefcrtng} on m1 Yield of Y0*263*D. 3. Research Report XN-47-22 {R.R.Denslow) on Goal field of Y0*8*8# 4* letter (July 30, 1936) R.R*Denslw-H.A.Kaiser on Goal field of Report (fell* 84, 1947) by A.R.Hsnke on Aeeuraey^Preoicion* * Si.gnamificear*n'*t' f"ig-u--r--e--*. 6* Analytical Methods KCR-116, KOR-123* 7* Notebook 1280, Sap* 1280*05* 8* Notebook 1849, Bap* 1849*34* DUP050067065