Document 91xN0yOQndz0kJnOjEddmVer6

INTER - OF TICE MEMO TEHNECO CHEMICALS, INC. To F ROM suejfct V,1. M i r i ngof f at Burl i ngton J.U. poarc'n at Durl ington PROCESS ENGINEERING MONTHLY REPORTFebruary V'.'S EUr^L IIJGTON Ha rch Dai: Copy TO II, B. Carr VI, C. Champion W. F, Gabel Dr, R.T, Gotiesman Dr, L. Gross Dr. P.A, Lobo R.S. Miller Dr, M. Rosen G.I. Rozand P.R. Scarito A,C. Siegel J.T. Sweeney C.G. Thompson T.T. Zuhl J.J. Zullo P.E, - Burlington PVij,tlot Plant - Plemington ^/Fiile A. Dispersion Resin 1- Stripping T r la 1 s (L.A. Schappel & Pilot Plant Group) The new higher pump ng rate, low shear agitator was installed on No. 4 strip per, and set at a speed of 20 RPM for the initial trials. Four product types were tested with this modification, us.ng varying amounts of n trogen sparge over time per,ods up to nine hours. A total of 14 experiments have been run to date. Early experiments with low nitrogen sparge rates indicat ed little benefit with the new agitator. Higher sparge rates (25 cfm) are expected to show much better VCM removal with the higher speed agitator. As of this writing, these results are not complete. Attached, grains I and II, illustrate the progress to date. New agitated results are highlighted with bold lines. Further increase in this agitator s.ieed to 45 rpm, has been re quested. Evaluations of this higher speed will take place in early March. A four batch lot of 1730 was being run in "B" plant at the end of this month, where a nitrogen sparge rate of 25 scfm was maintained with full vacuum using the new agitator at 20 rpm. Slop problems were encountered, and the lot was blended with regular production. A repeat of this test will be schedu1ed. 2. Foam Resins, NPI 1042 & 104j (L- Schappel1) The above NP 11s were run to produce type 1750 and 1756 foam resins, re spectively, on special request, by sales. Monitoring of the additive resin system, once again, showed poor control of pallet to pallet weights of AR90J. COLOR!TE 010920 Page tv.o Latex samples were also analyzed for VCM. The averages are as follows: TYPE NO OF TESTS PPM,VCM 1750 1755 4 11>000 4 11.600 3. VCI-1 Decay m Dispersion Resins (R. Donovan) Two pallets of resin 1750, 1756. '755, 1757 and 0565 are being sampled daily and analyzed for VCM content. Present data shows a rapid initial decay, occuring during the first two (2) days, with a subsequent grad ual decay. VCM content after five days in the warehouse has decreased to the 10 PPM level for most resin types, with assurance that all resin will be below the 10 PPM level after seven days. Attached is a graph showing the decay rates for the various resins sampled. 4. Process Control, Dispersion Process (R. Donovan) Three parameters of process control were monitored to gain insight into reasons for rheology vatiations. a. Water to monomer ratio, "B" Plant ) Observed water to monomer ratio Formulation Resin Type Ave rage Range Target 0565 1757 1730 1.0465 1 076 1 084 1.0377 1.070 1.075 to 1.05*16 to 1.0378 to 1.090 1.092 1 063 1.075 The range of approximately 2% for each formulation appears reasonable; however, the average for 0565 is significantly lower than formulation target. b. A P Control Control charts are being prepared for both "A" and "B" plant To date, AP consistency appears better in "A" plant than in "B" plant The sign ificance of the variability, which exists is not completely understood, at this time. c. Emuls if ier Weights Based on weight scale readings, the emulsifier changes are within 5 pounds of the required formulations, which appears to be reasonable control. The above areas are all being investigated, relative to the Task Force requirements. The significance, or lack thereof, will be evaluated by the group, and reported separately. COLOR!TE 010921 Page three B. Suspens jon 1. Foam Blend Resin BP'-505 (L- Schappell) Slurry and drier samples of BP.-505 produced on 1/28 were taken and an alyzed for VCM content. The results are beiow: SAMPLE PPM, VCM Slurry, B-34-8 Drier, 1030 hr., 595002 Drier, 1230 hr., 595002 Drier, 1430 hr. , 595002 Drier, 1630 hr., 595002 14.57 4.28 1^-95 15.42 2-35 2. Copolymer Production In the PVC Plant-LOP 1045-1 (L. Medeiros) Five batches of T/315 were charged in R-10 and R-ll in Plant 3- All batches utilized a 1.56 W/M ratio and 125F change temperature. Three batches charged via C-3360-l4o incorporated a 25% increase in gelatin (44 lbs.). The latter two were charged via C --3360--141 with a 37% increase in gelatin (48 lbs.). No problems in kenetics or suspension stability were encountered The monomer from these batches was charged mixed from the copolymer plant weight scale. Particle size distribution was, as follows: Lot: Formulat ion P S + 60 +80 + 100 + 140 +200 Thru Gelatin "A", lbs. 615017 3360-140 3 21 38 71 92 8 44 615013 Control 1-4 17-29 40-51 73-80 90-95 5-10 33 615019 3360-141 tr 3 13 54 85 15 48 (B-o 2 8 69 82 98 2 Higher gelatin levels appear to be required for running in the PVC plant. C. General * 1. Vent Condenser Blow-Off (L. Schappell) Daily monitoring of the gas being discharged to the atmosphere through the vent condenser shows roughly 470///day of VCM exhausted during the month of February. This result is based on a 26.0% VCM content in the vented gas. Compared to January figures, which show 220#/day discharged, the amount of VCM has more than doubled. The increase is due, in part, to various stripping conditions, resulting in greater residual VCM removal, being evaluated in the plant. COLORXTE 010922 I Page four II. FLEMINGTON (M.$. Wilkenfeld) A. V/aste Treatment - Roy Elam is being contacted to advise him that we are ready for mechanical tie-in to the RTMUA manhole, B. VCM in V.;aste Water - A quoataion has been received from ARCAS cover ing a VCM in water analyser. C. Centrifuge Modifications - The spare centrifuge conveyor has been returned to Bird Machine'Yor" mod i f icat. ons. The first two attempts by Bird were done improperly. Lou Iszak will check the construction to be certain it is correct this time. When the conveyor is returned "A' side drying system can be converted for fopolymer production. D. AOP1s - All AOP's, with the exception of waste treatment, have been written in collaboration with Bill Bord. The waste treatment AOP's are being prepared. E. Field Checking - A constant check is being made as field work pro gresses. Compliance with flow sheets and process requirements are under daily review. A punch list is being developed. ill. PASSADENA START UP L. Medeiros and J. Poarch assisted with the Passadena start-up. Along with general trouble-shooting activities, the following were accomplished: A. VCM Remova1 Unit-----A complete examination of the VCM removable unit (carbon adsorption system) showed the need for several minor revisions needed prior to start-up. 1. The K355 feed gas blower control action was modified from manual to automatic, by using the signal from the slurry tank pressure switch to start the blower when the pressure relief valve opens and stop the blower when the relief valve closes. This modification prevents the slurry tank pressure relief from being dead-headed against the ad sorption system if an operator neglected to start the K355 blower. 2. Another cycle was added to allow the regeneration gas heater, an electrical heater, to cool prior to switching the gas to the cooling cycle. An electrical modification was also made, to prevent the heater from staying on if the regeneration gas blower failed, or stopped during the heating cycle. 3. Prior to our departure, the unit was placed on stream with the slur ry tank vent and inert vent condenser. ' B. Reflux Condensers It was noted, during the first few batches, that the reflux condensers COLOR!TE 010923 Page five were not carrying their expected share of the heat load. A study re vealed that there was insufficient head on the condensate return to overcome the pressure drop on the vapor header; hence, the condensers were flooding. A prototype design was sketched and installed on reactor no. 1, which gave the desired results--the condenser worked according to . design. Following this, a permanent design was fabricated with all the necessary valves on reactor no. 3- All reactors were to be so modified. IV. .Genera 1 A. The services of R. Donovan, Process Engineer, from the Organics Process Group, have been utilized for the entire month. B. The piiot plant group has given their full services to the Burlington Process Engineering effort during the month. I j | j \ 5 JWP:mm "h COLOR!TE 010924 NO 3 4 0 R < L 3 d O lC T Z O fN G R A P H PAR ER G-RAPH I COLOR!TE 010925 COLORITE 010926 `QrRRPH 1L. COLORITE 010927 ROJSCT UI3SR 09922-0391 DEI-377 - * l.W. Poarch FROM Feb. I TO Feb, 28, 1 975 TSNITECO INTERMEDIATES DIVISIOMNIGIIENRINQ TIMS DISTRIDUTI011 - MONTHLY (SALARY) ACCOUNT , NUMBER JOB DESCRIPTION Passadena Start-Up SUN MON TUE WED THU FRI SAT TOTAL 128 VCM Reduction 56 Burlington Plant Support 16 Holiday , '8 N. - * 1 1 1 COLOR!TE 010928 * ' EXG. FORM #29 ' TOTALS -. 208 { i:a:: M.S. Wilkenfeld FROM 2/1/75 TO 2/28/75 PROJECT LTT3ER 7600 TENHECO INTERMEDIATES division HGINLERIRC TIME DISTRIBUTION - MONTHLY (SALARY) ACCOUNT ' , IRJT'iBER JOB DESCRIPTION FlernlnEton Cooolvmer Oonversion SUN MON TUE UED THU FRI SAT TOTAL 24 32 32 32 24 144 Hoiidav 88 Personal 88 oo t* H H o h* O VO w * VO ENG. FORM #29 TOTALS ' - 32 32 32 32 32 160 L A Sch-npell___________ FROM Feb. 1, 1975 TO Feb. 28, T375 \GJ~SCT J13SR TENUSCO INTERMEDIATES DIVISIONLIGI! STRING TIMS DISTRIBUTION - MONTI US (SMART) ACCOUNT .NUMBER JOB DESCRIPTION MVC Reduction-Dispersion Latexes SUN MON TUE USD THU FRI SAT TOTAL 18 23 23 , 25 18 107 Foam Resins-Bagging & Sampling NPt 1042,1043 LOP 1045, 315 in R-10 & R-Il 2 44 6 84 2 16 14 Recovered,MVC - Material Hoiiday a 7 - 7 - Study RMT charging ft Homogenizations 4 I11 1 8 COLORITE 0X0930 * ' i 1 ` * ___ ENG. FORM ti19 1 * i - j TOTALS 32 32 32 32 32 160 :/U3 PROJECT nte-ber p 4 Donovan FROM 2/1/75 TO tenneoo intermediates divisiom;::gi:e:itii:o time distribution - monthly (salary) ACCOUIJT . NUMBER JOB DESCRIPTION VCM Resin Decay SUN MON TUE WED THU FRI sat TOTAL 6 7 7 . 8 12 40 Copoylmer Stripping Trial 64 10 Dispersion Resin Stripping Trial e6 COLORITE 0 1 0 9 3 1 1 I i 1' b f ! ( i. . s ( \ --:---------------i &* -- ! ?r p ? | ENG. FORM #29 - * 1 VCM Vent Condenser. Disp. Plant - Homogenization Stage AP Batch Mixing Tank Survey Foam Resin Add System VCM Material Balance Hoiiday 6 5k '6 5 5 6 54 A2 8 43 - 7v 4 5 3. 64 26 . - 77 27 23 16 8 8 TOTALS 32 32 32 32 32 ?60