Document OE6Dq9mD9q2QkoqowGRZKg01Q

' ns.UITG POL* PS & E7?:ci!Enc.*u cc. 5o -Ingf ie * d , ; assac Uise tts Vwa 7, 1972 Kstflo Pi oo' Pe -"3cnc*1 'iZ l 27 As all of ycu are veil aware, we are haying more than our sha^e c rc-ob lams with the new solvent system. <ettie bull duo, h : -:i TH" osses, plugged vacuum jets and dumping p.-colems a^e ra'-siig -,a-o with our rates, maintenance costs, -. id operations in general. * o an sfrort to resolve some of these profc'ams. we returned to srv t coverage some four week's ape. Since most of our difficulties . e cortered ^rcund the buildup problem, we zeroed in on this i n i t' a . P.i-'ht from the start v:e had difficulty maintaining IMF purity. " cassi^e v/ater pickup across the system exceeded the solvent re:; r'Stem. As a rasult, it was necessa "y to modify operating condi c *n order to recover 12,900 gallons of THF every 16 hrs. For the twe weeks we have been achieving this objective and THF purity h: been in soec for the same oerio-i Another problem has been keep1' the THF hot. Last Friday we replaced the recireelating pump and heat exchanger with a submerged coil. This has not quite solved tea. problem. As toon as the temperature returns to bOC, we will iNfln controlled evaluation using existing cleaning conditions. ;aieral ooservaticn is that the increased contact time has retard polymer buildup despite lack of sufficient purity or temperature, wi# thing we have learned is that the kettles are not being eor/pl tiTled. (See chart in kettle floor notebook,) Inadequate vacuum purging is responsible for this problem. We will attempt to ccr" cc is either withoverflow lines back to T1 or by beefing up the v 'urge Ojr final and most serious problem is the new vaocr .eco. vstem. This is killing us in THF usage. Every time we flush a Tittle we have 12 gals, of THF or $39 worth of material in kettle It is costing us $1 ,OGO/day in THF alone when that system is down ieecless to say, this Is receiving our utmost attention. Fortum : ; ** cuallcy remains excellent as you ran see by the chart. This allowed us to keep most of our customers supplied despite <-ha red ciroughput. As you can see, the road ahead is not an easy one. i'-'r, I am confident that we will lick these problems. I will cc i... use the kettle floor log books to keep you up to date on what g: ing on. //: Uihlain ____ PRIVILEGED AND ORDER" UCC 081538