Document RaQVNm4gZ4ap5wRnaan93yDwa

TENNECOI N T <; H - O'F F I C L MEMO CHEMICALS, INC. To Distribution At F,!as' L, Schappell/P. Scheiner Ar Burlington Subject RESULTS OF STEAMING TESTS ON 1755 LATEX IN DISPERSION STRIPPERS - ESR 499 (LOP 1155) Date. Juno 21, 1977 Copy to D. C. Co Id iron R. S. Cole S. A, Edenbaum J, K. Jacob J. W. Poarch J. P, Sandstedt P. R. Scarito E. V. Schenke A. C. Siegel C. G. Thompson The attached conclusions and data summarize the results of direct steam injection into Dispersion Stripper # 4 to heat 1755 latex thereby facil itating VCM removal. The test work represents the first time direct steaming of latex has been achieved without any apparent affect on filtration. Direct steam heating of latex has been shown to facilitate stripping of batches to meet EPA requirements thereby substantially reducing the impact on productivity. Runs at high temperature (135-140F) have shown that 2,000 ppm level can be achieved without the use of nitrogen (See Fig. 1). Conclusions based on these runs are summarized in the attached. Further evaluation of the direct steaming/stripping procedure on other products are necessary to determine the following: 1. Are any of the resin types heat sensitive at temperatures up to 140 F? 2. Will steaming affect the properties of the finished products? 3. Will nitrogen sparge be necessary to reach 2,000 PPM? 4. Will a steaming/stripping technique reach 500 PPM levels in a reasonable cycle time? LS/PS/ib Attachment ) L/ Schappell/P. Scheiner COLOR!TE 018587 RESULTS OF STEAMING TESTS ON 1755 LATEX IN DISPERSION STRIPPING - ESR 499 (LOP 1155) L. Schappell/P. Scheiner June 21, 1977 PAGE 2 CONCLUSIONS 1. Direct steaming after initial recovery has been completed does not affect the filterability of 1755 latex. 2. Questionable filterability results from heat-up prior to recovery. 3. Latex temperatures as high as 140F. were obtained by direct steaming of latex without affecting filterability. 4. A latex heat-up as high as 32F. (from 108F. to 140F.) was attained. 5. Substantial VCM removal results from heat-up of latex. More than 50% VCM reduction during 1 hour of heat-up (without nitrogen) was experienced. 6. Levels of less than 2000 PPM were reached, in some cases, without the use of nitrogen sparge. COLORITE 018588 10 J~ t & 9 SvX7/ _ _;_ ' '' ___ ' '~i7$zr- -- Ajo i ___' ' /7, r 4 ~c, c7 AJ I ____________ . / Ha. Ztk ~T? 3 77.^s H s~ ' COLORXTE 018589 1755 STEAM HEATING RUNS .F FILTRATION , MOISTURE ORE AFTER AM STEAM - 21.7 0 24.7 0 29.7 5 22.9 1 22.4 9 31.7 1 30.4 5 23.2 5 23.1 VINYL RECOVERY PPM CHLORIDE AFTER STEAM PPM LEVELS VCM LEVEL @ TIME AFTER STEAM 15,166 12,630 17,701 5,435 4,660 8,533 6731 @ 1 HR. 9,760 2,950 1380 @ 2 HRS. 17,430 4,790 1016 @ 2 HRS. 9,727 1,656 767 @ 1 HR.; 130 <3 3 HRS. 15,560 5,850 2860 @ 1 HR. ; 1165 @ 3 HRS. 24,0 30.0 COMMENTS First run no data taken. Hvy foaming throughout recovery. Hvy foaming. Hvy foam, defoamer plugged, questionable evacuation. No N2 flow - plugged line, tower steamed during recovery. No N2 flow - plugged line. Tower steamed during recovery. Recovery extended one hour beyond steaming - 2 HRS of Nitrogen. No Nitrogen during run. Temperature drifted to 138F after s t earn ing . Temperature drifted to 132CF after steaming. COLOR!TE 018590