Document MJEyJxovNOLyREMeY1zNk0j8L

E. 1. DU PONT DE NEMOURS & COMPANY KREBS PIGMENTS DEPARTMENT 256 VANDERPOOL STREET NEWARK, NEW JERSEY Serial No. KN-49-5 Copy No. 1 ^ ' /T A / ' * F-<s~ NEWARK PLANT PIGMENT COLOR RESEARCH REPORT BENZIDINE YELLOW YT-564-D and YT-571-P (A) 3,3f-dichlor benzidine^(aceto-acet-ortho-toluidide}2 | Period Covered: April 1947 -- May 194^. FILE: DATE: 2/24/49 N42189 2a/. Serial No. KN-49-5 Copy No* i Copy to: #1 - Numerical File 2 Research Office (221.4) 3 - Library File (221.4) 4 - #10 Building File 5 - V. Chalupski - Plant Files o - D. B. Killian* Newark 7 - Extra NEWARK PLANT PIOMSSIT COLOR RESEARCH REPORT Final Report PLANT DEVELOPMENT Title? BENZIDINE YELLOW YT-564-D and TT-571-P (A) 3,3,-dichlor benaidine^(aceto-acet-ortho-teluididejg Period Covered: April 1947 - May 194#. Charge: A-IIC-220 SUBMITTED BY: A. D. MILLS , " DATE SUBMITTED: 1/27/49 APPROVED BY : A, A. BRIZZOLARA DATE ISSUED: 2/24/49 DUP050067148 IKTROPPCTION After a brief semi-works development a satisfactory process was obtained in lot 9196* this formula Included the use of sulfamic acid to destroy the excess nitrous acid and a lower temperature of coupling (65 - 66F } was used, Plant development was undertaken on the 9190 process, mmmMoomwsxms (1) A total of 14 batches were made in the plant3 four on a 405# batch size and ten on an 10# size. Of the first four, two were coupled at 6P and two at 66F. The process responded to tble variable and the (B) formula was Witten using a coupling temperature of 76F, The two batches coupled at the lower temperature of 6P, were s lighter and a weaker than those coupled at 66F. Ten batch# we#f made on the (B) process and all were satisfactory in quality, (2) Following the development study the (C) procedure was written up on a 1,6 mol basis (1035#) with a 76F. coupling. (3) A blend of 50 pounds each of the first four lots was mad and set up as current standard. This is YT-564-D (0), SD-40546* lot 02406 and was approved by the Sales Division, (4) Production assumed supervision of the production of IT-564-D (C) on April 6, 1946* (5) IT-571-P (A), which is tT-564-0 (C) press cake was accepted by Production on May 21, 1946* REFERENCES KN-49-3 Laboratory study of S-2402 KH-49-4 Semi-Works Development of YT-564-B* DSH-49-6 Plant Development of YT-564-D, , DUP050067149