Document armx3YD9n9BJo3zOvawz7zdX

E. I. DU PONT DE NEMOURS & COMPANY KREBS PIGMENTS DEPARTMENT 256 YANDERPOOL STREET NEWARK. NEW JERSEY Copy No. 1 Numerical File. _ _ _ _ _ _ _ _ _ - / f / / ' 4 - 6<P NEWARK PLANT PIGMENT COLOR RESEARCH REPORT Final Report GT-64S-D. MAGNESIUM RQSINAIE TREATMENT FOR IMPROVED FILTRATION. SEMI-WORKS AND PLANT DEVELOPMENT Period Covered: JULY 1945 to MARGH 1946. FILE: DATE: 223.71 10/30/44 NJ8270 N39967 Serial No. KN-46-68 Copy No. l Copy to: #1 - Numerical File 2 - Research Office (223.71) 3 - Library File (223*71) 4 - #10 Building File 5 - V. Chalupski - Plant Files 6 - Imperial Chemical Industries, Ltd. rj _ ll il It II g .. It ll ll II 9 - W. F. Spengemail, Newark NEWARK PLANT PIGMENT COLOR RESEARCH REPORT Final Report GT-646-D. MAGNESIUM ROSIRATE TREATMENT FOR IMPROVED FILTRATION. SEMI-WORKS AND PLANT DEVELOPMENT JULY 1945 te MARCH 1946 SUBMITTED BY: APPROVED BY: DATE SUBMITTED: 10/8/46 DATE ISSUED: 10/30/46 N39967.01 DUP050150159 1 INTRODUCTION! This report covers the semi-works trial of a laboratory Pigment Green B formulation designed to give improved pressing and washing, and the plant development work leading to the adoption of a new standard and formula. SUMMARY & CONCLUSIONS; 1. A new formula, GT-646-D, X-2256, has been set up, including an increase in batch size from 1.9 to 3o2 mols, and a treatment with magnesium rosinate to give better filtration and washing. 2. A new standard has been established (GT-646-D, SD-48399, batch 8548} composed of the first six plant batches made using the above formula. 3. The pressing time of 12-16 hours, and washing time of 35-40 hours, represents an estimate made from widely fluctuating values of these data taken from plant runs. 4. Ho estimate of the improvement, if any, in filtration and washing times can be made. 5* Goal yield should be 715 pounds at 1,7% moisture, as determined by laboratory experiment, and checked by calculation. MggRiMmi>-P.as.AiLsi Semi-Works Batches! Three batches of 0.2, 0.4, and 0.6 mols were made on the K-2171 (magnesium rosinate treated) formula, and one 0.2 mol batch was made on the K-2183 formula (no magnesium rosinate treatment} The untreated batch was yellow in masstone, strong and Intense against the treated material, but all semi-works batches were strong and at least equal in Intensity of tint to the old GT-646-D standard, and close to K-2171 In strength. Filtration times were not comparable among the batches, so that any possible advantage due to the magnesium rosinate treatment was not observable. Plant Batches! In the plant 20 batches were made on the K-2171 formula, two at 1.9 mols, the remainder at 3*32 mols. The unusual operating difficulties were encountered, and a standard mix was made of equal parts of the first six batches. Pressing and washing performance cannot be evaluated because the press was doubled in size at the time the K-2171 formula was introduced. Therefore, there are no old type GT-646-D batches (K-1913) pressed under present conditions, with which to compare current batches. Details of experimental work can be found in Development Section Notebook 46-42. DUP050150160 2- GLOSSARY GX-646-D Pigment Green B - Iron salt of nitroso beta naphthol containing sodium oleate and magnesium rosinate. i DUP050150161