Document OJk0aYMmn4ZdV1agbVR16jwde

DownloadSearchable PDFRandom document
TENNECOINTER-OFFICE MEMO CHEMICALS, ISC. I To From Subject J. T. Swee.ney At Flemington R. A. Donovan At Flemington Split Recovery System Trials Effect on Residual VCM in Slurry date May 26, 1976 Copt to R. F. Fanter W. F. Gabel D. Goodman D, M, Hershkowitz R. A. Lojewski W. Miringoff M. K. Rosen A. C. Siegel As was established from previous plant trials (3/17/76 to 3/19/76), implementation of the proposed split recovery system operation will result in better utilization of the present recovery system capacity and increased plant capacity (reference: memo to J. T,, Sweeney from R. A. Donovan - Split Recovery System Trials, March 26, 1976). It was noticed at the time, that residual VCM levels in the stripped slurries rose above the 400 ppm limit. This problem was thought to be caused by misoperation of the steam valve on the stripper. In an attempt to verify that this, in fact, was the problem, another series of plant trials using the split recovery technique, with proper adjustment to the steam valve, were conducted. Of primary concern during these trials, was whether or not the stripped slurry would contain a maximum VCM level of 400 ppm. Slurry samples, stripped using the split recovery technique, were taken and analyzed by the Analytical Services Group for VCM levels. These results are summarized in the attached table. From this data, it can be seen that the stripping operation using the split recovery system results in slurry VCM levels of less than 400 ppm (average VCM level of 323 ppm), which will allow compliance to the EPA regulation. Based on this data, it is again recommended that the split recovery system be implemented as it will increase productivity and enable compliance to EPA regulation on VCM levels in stripped slurry. RAD:ms R. A. Donovan COLORITE 017454 TABLE I - Slurry VCM Levels UsinR Split Recovery Technique Batch No. 2045 2046 2047 2048 2056 2057 2059 2062 2063 2065 Residual VCM, ppm 254 291 338 520 360 273 312 499 221 235 Average VCM Level = 325 ppm COLORITE 017455