Document zb3LXzb02jvJeQwdbnXGBgkN7

E I. DU PONT DE NEMOURS & COMPANY KREBS PIGMENTS DEPARTMENT 256 VANDERPOOL STREET NEWARK. NEW JERSEY Cop/ No. 1 NEWARK PLANT PIGMENT COLOR RESEARCH REPORT Period Covered: RT-427-D ECONOMY PROCESS. SEMI-WORKS AND PLANT PRODUCTION. December 1945 to August 1946. FILE: DATE: 10/30/46 NJQ275 N39961 Copy to> #1 - Kuaerleal File 2 R#eurch Office (221.21) 3 * library Flit (221.21) 4 - #10 Building File 5 ? Chalupeki * Pleat File* W * 9 l. F. Spengeaea, Seeerk Serial So. KM6-72 Copy Ho* 1 HEWAftK PUNS PIGUEHT COWR S8SBARQ8 RSPQRT Fine! Deport Title* RT-427- SCOHOMT PROCESS. 8EM-W0RKS AND PLAMT IMBOOgOB___. _______________ Period Coveredt Deeember 1945 to August 1946. N39961.01 DUP050150136 imOBUCTIOH This report describee oonl-worio and plant development work dona on -22*4, a 3.97 mol also laboratory formula for RT-427-B which showed a saving oatlnatsd at about $0.10 par pound in total adll oost. 1. A aso plant formula, -2275* basod on tha laboratory K-224*, sag developed. 2. A nos plant standard* SO *8*74* (lot *7998) was establiohad. Kvaluation by tha Sales Servioa Laboratory gave the following grading to tha now standard versus tha old otandard 80 *7848 (lot 29049) mmsm liEtBffcfe 2Itt Uaht Fastness a. light, yollow wo atroag traoo pollan equal 3. Tha long-atondlag diffleultp with lightness, dullness, and palloanoaa of naootono continued in the dovolopnent of the oeoaony formula, hut performance on tha now preeooo lo more or laoa equal to the old. The now standard* however, should ho isoro nearly repreeentativ* of eurront production. One semi-works batoh, nado on tho laboratory formula K-2244, wao a reasonable ohooh to the standard than in uoo (lot 29049), oo plant produetion was begun immediately afterward, on Oeeember 13, 19*5* Thirty-two plant batohoa wore nado under development ouperviaion. Tho laboratory formula K-2244 differed from tho previous standard formula X-2979 oo specified below. a) Doubled batoh eiao. b) Reversed coupling (beta-naphihol into diaso) e) Decreased coupling voluao, (allowing tho inoroaoo in batoh siso). d) Omission of filtration of diaso oolution. e) Substitution of suifaaie aoid for uroo. f) Blight doorcase in bsta-naphthol from amount used la K-2079. (g) Sliuiuation of about 3.6 nolo of hydroehlerio aoid per mol of pigment. Tho standard formula K-2275 which was evolved differed froin K-2244 in tho following details, without notiooablo offset on tinotorial properties* (a) Nitrite wag reduood from. 284 peumdg to 279#, to reduce tho amount of sulfamic aoid required. (b) Bata-napbthol wao ineroaood from 580 to 588 pounds, to reduce over-large diaso oaooooeo. The Abbe-Lenart minor was wood on tho first plant batoh to slurry tho mHi, hut in all subsequent batohos tho F00H1 was slurried in tho diaso vat in tho normal manner. DUP050150137 Because of tbo largo batch also* filtration mo carried oat la fiur press-loado* Considerable dlfforoaooo were aotod aaong the tinctorial proportion of tbo different portloao frsn tbo sons coupling, probably duo to dlfforoaoo in ecnpletcneos of msbing and la drying tlno and te^eraturo* Goal yield determinations m K-2275 gave 1269 pounds* while tho plant average for 31 batoboo me 123? poundo* or !$ of goal* The otaadard ads aa mdo of notorial aaaufaoturod under plant supervision aftor tho development program ma scnploted* Further dotallo on tbo batoboo note In thio otudy any bo found la D8N-46-46. KS-46-75. Laboratory development of K2244* KN-45-72* Booaeay Study| Rod Tenor RT-427-D, Laboratory, dnoi-Verko aad Plant* KH-43-172. Rod Tenor RT-427-B. Ingredient and process savings. KH"4024?* Substitution of orudo PQORA for "Lithesol" bold FCQ in RT-427-B. KN-40-7. Plant Production, RT-427-0. D8H-46-46. GLOSSARY RT*42?3> Pigment dyestuff - a coupling of diasotleed Para abler ortho aitraallltto aad Beta aaphthol* DON. Development Sootion Notebook* DUP050150138