Document zoR3G8KYJMD8Qv8VmOrNqJVQB

Inter-office memo TENNECO CHEMICALS, INC. To H. H. IXihamel At Burlington Date February 27, 1969 From G. W. Leach At Burlington Subject Evaluation of 250-12 Type Resin Using Increased Monomer Charge Copy to P. F. Albanese R. S. Cole P. R. Scarito File ^ At Production's request. Process Engineering has compared and evaluated the results of Increasing the monomer charge in the 250-12 type homopolymer resin. In general, an upward trend was detected in productivity, while no significant in crease occurred in reaction time. It is recommended that pro duction continue to increase the monomer charge on this type resin to 11,550 lbs. per batch. Only lots of 250-12 resin from the beginning of 1969 were evaluated (see appendix). The three main aspects that were monitored and compared were: reaction time, re3in properties, and pounds yield of resin per lot. Only lots which consisted of batches with the same recovered MVC to virgin MVC ratio were compared. This was an attempt to compare lots with the same kinetics. Reaction time was an important consideration. A drastic increase in reaction time could nulify the increase in pro ductivity arising from the increased monomer charges. However, this was not the case. The maximum difference detected between the high and low charge average reaction times amounted to 0.2 hours (10.2 hours for low charge and 10.4 hours for high charge). This was well within the range of scatter encountered in the raw data and could not be considered significant. Resin properties did not ehange appreciably. Particle size distribution shifted slightly. The higher charge lots were coarser than the low charge lots. This was expected since the water and methocel levels were not altered. The small variation was well within specification. * The adjusted productivities, based on the confounding plant's usage, were astounding to say the least. The low charge lots consistently adjusted slightly lower than the es timated 67,000 pounds per lot indicating that 67,000 is a good estimate of the low charge productivity. The high charge lot, however, consistently adjusted substantially above the 68,500 pounds per lot that was estimated. The average pro ductivity per lot ifor the low charge was 66,500 pounds/lot and the high charge was 70,500 pounds per lot. I find It had to believe the high charge adjustments, but the productivity has definitely increased. COLORITE 015568 \ 2- V/hen the charge is increased to 11,550 pounds per hatch, a productivity of 70,750 pounds per lot can be expected. This is a 7 percent increase over 10,750 pound monomer charge lots. Perhaps another slight shift in particle size distribution will be experienced. If it changes out of specification, a small adjustment to the methocel charge should rectify the situation. Reaction time should not appreciably increase. I will monitor the results of the 11,550 pound monomer charge lots when they are run. GWL/rJl Attachment COLORITE 015569 Lot MVC (Virgin) Pounds (Recovered) Ave. Reaction Time Relative Viscosity Gels Dry Blend Bulk Density Heat Stability Contamination Average Maximum Screens +60 +80 +100 +140 +200 Thru Volatiles Lb./batch (Assumed) Adjusted lb./Batch 599001 599002* 599005 599004* 599005 399006 8750 10250 8750 8750 8750 8750 2000 10.5 2.45 500 10.12 2.42 2000 10.4 2.45 2000 10.56 2.42 2000 10.2 2.41 2000 10.3 2.41 9 9 12 10 6 7 7.1 6.6 7.8 6.2 11.6/ 7.6 10.0 51.5 -- 51-5 -- 50.2 -- 50.9 -- 31.2 -- 30.9 -- 5/0 4/0 4/0 4/0 4/0 4/0 9/1 7/0 7/2 6/1 6/1 11/0 Tr 4 55 92 100 -- .25 67.0 66.4 Tr Tr 64 61 59 89 92 98' 99 21 .29 .28 67.O 67 66.675 Tr Tr Tr >2 1-1 4 49-50 37-31 57 88-87 83-82 88 98-97 97-97 97 2-5 3-3 3 .62 ..22 .25 67 67 67 66.4 66.4 * w Batches In lot had varying virgin to recovered mcnomer ratio. COLORITE 015570 Comparison of Reaction Time & Resin Properties of Low & High Charge Lots PVC 250-12 399007* 399008* 399009 399010 399011 399013* 399014 399015 399016 9750 10750 8750 8750 9000 8750 8750 9000 9000 1000 -- 2000 2000 1500 2000 2000 2000 2000 10.58 9.65 10.15 10.2 10.78 10.1 10.1 9.96 10.62 2.44 2.41 2.42 2.45 2.44 2.42 2.42 2.41 2.44 10 14-15 5 9 9 12 10 10 7 7.4 6.4 7.0 6.8 7.3 7-0 6.4 6.7 6.6 31.2 -- 31.0 -- 31.0 -- 32.0 0/100 32.2 -- 32.0 -- 31.5 -- 30.8 0/96 31.3 -- 4/0 6/0 6/0 6/0 6/0 4/0 10/0 7/0 4/0 9/0 9/0 7/1 9/0 8/2 7/1 Vi 9/1 6/0 Tr 11 67 91 98 2 .2 67 6t , Tr 34 76 94 100 -- .21 67 -- Tr 7 61 93 100 -- 35 67 -- Tr 10 67 93 99 1 .21 67 67.95 Tr 13 68 93 99. 1 .36 68.5 -- Tr 8 62 88 96 4 32 67.O -- Tr 12 66 89 96 4 .26 67 Tr 17 73 93 99 1 .26 68.5 -- Tr 5 60 90 99 1 .32 68.5 67.95 COLORITE 015571 Formulation No.: H-3122-D30 599017* 399018* 399019 399020* 399021* 399022 399023* 10500 10000 9000 9000 9000 9000 9000 500 1000 2000 2000 2000 2000 2000 10.46 10.12 10.1 10.3 10.78 10.46 10.52 2.41 2.42 2.40 2.41 2.43 2.42 2.45 9 6 11 13-14 8 7 9 6.9 7.0 7.2 6.9 7-5 7-5 -- 51.2 -- 51.5 -- 31.5 -- 30.8 0/100 31.2 -- 31.0 -- 31.5 -- 5/0 6/0 3/0 4/0 6/0 5/0 5/1 5/0 6/0 5/1 10/0 12/2 11/4 12/1 Tr 15 61 91 98 2 .54 68.5 72.438 Tr 7 68 92 98 2 .57 68.5 72.438 Tr 16 73 94 99 1 .4 68.5 -- Tr 11 70 93 99 1 .13 68.5 -- Tr 7 65 95 99 * 1 .4 68.5 71.10 Tr 6 60 90 98 2 .35 68.5 71.10 Tr 10 68 93 99 1 .32 68.5 ` -- 66.5 M lbs. = Ave. Productivity/Lot Low Charge 70.5 M lbs. = Ave. Productivity/Lot High Charge I 10.2 hrs. = Ave. Reaction Time Low Charge 10.4 hrs. = Ave. Reaction Time High Charge COLORITE 015572