Document qmKwYvyw1DBwZbRp92bLeeJaj

f --^ INTERNAL CORRESPONDENCE lT Mjioi1 UC >49- 2 CHEMICALS AND PLASTICS TO (NAME) Mr. M. E. Eisenhopr COMPANY Mr. R. L. Frantz LOCATION Mr. F. L. Johnson P. O, BOX 471. TEXAS CITY. TEXAS 77590 date April 9, 1975 COPY TO Mr. R. P. Keefe Dr. D. R. Montgomery Mr. A. A. Peterson Mr. G. T. Pyle Mr. R. W. Sesler Mr. G. F. Tacquard subject Suspension Resin Residual Monomer if S Cc-" ;' ' Final results of residual monomer tests beginning in mid February and taken until unit shutdown are here summarized. Bird feed, dryer feed, dry resin and bin samples for QSAN, QSQL, QSQF, QSQH and VSKK are included. Averages for specific test points are given, which show a wide range from the easier tostrip resin of QSAN to the high residual monomer content resin of QSQF. Also included are the ratios of residual monomer in dryer feed to dry resin which are an indication of the amount of monomer lost across the drying sys tern. QSAN seems to be the most consistently low residual monomer resin with an average dry resin content of 126 ppm. QSAN made with Klucel showed a slightly lower average, but extensive sampling of this resin in production runs has not been done. QSAL, shows a higher dry resin content than QSAN with 274 ppm and also a smaller drop of monomer across the dryer, which indicates it is slightly harder to strip than QSAN. VSKK residual monomer content is quite high at 833 ppm, but it has not been batched stripped yet, which could greatly improve the results in the future. QSQF samples in this report have been batched stripped with steam sparging in the No. 5 blowdown tank at 90C for 30 minutes. Dry resin results are still relatively high with an average of 515 ppm, though the drop in monomer acorss the dryer is fairly high. QSQH resin, without batch stripping, contrasts greatly against that stripped at 90 for 30 minutes, with a significant drop of a factor of ten between the two conditions from 1530 ppm to 116 ppm. The only color data available is that for QSQF, with yellowness increasing slightly during stripping and whiteness on the average decreasing by a small factor. UCC 033912 Mr. M. E. Eisenhour et al 2. In general, it appears that the homopolymers of QSAN and QSAL strip easier than copolymers of the VAc and ethylene type. The batch stripping though indicates much progress in the reduction of residual monomer for the harder to strip resins and should provide us with more information as revisions to batch strip with steam sparging in all the blowdown tanks are initiated. Sincerely, RHM/st Attachments ucc 038913 Date Drying Sys tern Bird Feed VSKK 3/13 4 - 3/14 6 1,453 3/17 6 2, 305 3/18 6 3/20 6 - Average 1,879 Dryer feed/dry resin = 2.2 Dryer Feed 452 1,035 1,893 3, 997 - 1,844 QSAN 2/10 5 2/11 5 2/12 5 Average - 2/15 5 _ 2/16 5 - 2/17 5 - 2/21 5 995 2/25 4 640 2/26 4 656 Average 764 Dryer feed/dry resin = 4. 5 659 - 863 381 224 770 605 570 567 QSAL 2/19 3 3/10 4 3/11 4 Average Dryer feed/dry resin = 849 849 2. 3 746 556 573 625 Dry Resin 408 869 1, 500 739 653 833 84 74 143 100 111 228 51 101 120 147 126 388 163 273 274 Stripping Conditions Continuous 75 eC Klucel Klucel Klucel - Continuous 80"C Continuous 80"C 038914 Date * Drying ..System Bird Feed QSQF 3/13 7 2,944 3/14 7 1,330 3/17 7 5, 553 3/18 7 - 3/20 7 1,056 3/21 7 3, 067 Average 2, 790 Dryer feed/dry resin = 4.6 Dryer Feed 2, 147 1,444 3,417 3, 997 1,015 2,304 2, 387 Dry Resin 633 238 556 739 243 680 515 Stripping Conditions 90 - 30 minutes 90 - 30 minutes 90 - 30 minutes 90 - 30 minutes 90 - 30 minutes 90 - 30 minutes QSQH -s 2/28 ;7 3/3 7 Average 7, 537 9,439 8,488 7, 173 9, 199 8, 186 1,802 1.259 1,530 Continuous Continuous Dryer feed/dry resin = * 5.4 3/5 7 4, 606 3/6 7 2,305 Average . 3,455 Dryer feed/dry resin = 8. 9 3, 173 2, 377 2,775 324 85 - 30 minutes 300 85* - 30 minutes 312 3/10 3/11 3/12 Average Dryer feed/dry resin = - 638 429 534 7. 0 1,222 720 502 815 183 90 - 30 minutes 69 90 - 30 minutes 97 90 - 30 minutes 116 ' -V A y.. . 'A W '< ' * v - ' j*: /V ; /. ' AA. \ T v^vA'-A- . ~i ` ^ , - /A A A.A A * . : - *^V*-v?- =: ' .,,- j..;,;v -.'--= I A I* ucc 038915 Q5QH BIN DATA OF RESIDUAL VCl February 22 - March 15, 1975 Date 2/27 2/28 2/28 2/28 3/1 3/1 3/1 3/2 3/2 3/2 3/3 3/3 3/3 3/4 3/4 3/5 3/6 3/6 3/6 3/7 3/7 3/8 3/8 3/9 3/9 3/9 3/9 3/10 3/10 3/11 3/12 3/12 3/13 Bin 603 602 601 605 604 602 605 603 601 604 602 606 603 604 601 603 605 602 606 605 604 601 602 601 603 605 602 606 601 603 602 601 603 _Conditions______________________________ Residual VCl, ppm Normal stripping while pumping through vacuum stripper at 70C Average 1, 504 1,629 1,425 1,017 918 1,773 842 1, 136 1,179 1,403 1,077 1, 557 1,253 949 917 1,239 Batch vacuum stripped, unknown temp. and time because of bad thermocouple - off-color resin Average 232 178 110 173 Batch vacuum stripped, at 85C, 30minutes at 10-15 inches Hg vacuum. acceptable color resin Average 218 278 270 191 239 Batch vacuum stripped at 90C, 30 min.. acceptable color resin Average 69 111 153 173 160 158 83 53 103 91 188 122 ucc 038916 qsqf bin data of residual vet Date 3/13 3/14 3/15 3/15 3/16 3/16 3/16 3/17 3/18 3/18 3/18 3/19 Bin Residual Monomer 606 609 606 603 606 602 603 601 602 601 603 604 Average 946 155 111 735 690 977 671 930 995 1, 847 497 240 687 00 sDo O 00 0 O 00 0o OO 00 CO Stripping Conditions - 30 minutes 90e - 30 minutes - 90 - 30 minutes 80 - 30 minutes - 30 minutes 80 - 30 minutes - 30 minutes 80 - 30 minutes - 90 - 30 minutes 90 - 30 minutes 90 - 30 minutes 90 - 30 minutes ucc 038917 BIN DATA - RESIDUAL MONOMER PPM Date QSAN 2/10 2/11 2/11 2/15 2/16 2/16 2/17 2/17 2/18 2/18 2/23 2/23 2/23 2/23 2/24 2/25 2/25 QSAL 2/19 2/19 2/20 2/20 2/21 3/9 3/9 3/9 3/10 VSKK 3/13 3/13 3/13 3/14 Bin Residual Monomer 709 706 707 705 702 703 709 704 707 703 703 705 702 703 706 705 41 1 Average 78 70 185 108 90 50 73 104 111 115 122 200 112 96 80 156 104 109 . 709 707 702 707 708 408 409 702 705 Average 227 216 292 277 256 211 280 190 133 231 707 603 704 1,448 709 800 706 1.239 Stripping Conditions Continuous 80C Ditto Ditto Ditto Ditto Ditto Ditto Ditto Ditto Ditto Ditto Ditto Ditto Ditto Ditto Ditto Ditto Continuous 80 C Continuous 80C ditto ditto ditto ditto ditto ditto ditto Continuous 75 C ditto ditto ditto l ICC 03^18 Bin Data - Residual Monomer PPM 2 Date Bin Residual Monomer VSKK (c ontinued) 3/14 3/15 3/16 3/16 3/16 3/18 3/18 3/18 3/19 3/19 3/19 3/20 3/20 3/21 3/21 3/21 707 709 706 708 703 704 707 708 701 709 706 703 701 704 707 701 Averag e 960 1,418 924 909 846 606 1,416 660 1, 125 1,035 609 1, 102 1,783 2, 016 3, 514 785 1,189 Stripping Conditions Continuous 75C ditto ditto ditto ditto ditto ditto ditto ditto ditto ditto ditto ditto ditto ditto ditto ucc 038919