Document 82xKkNM8ZJkBbn9n5O35G3koK

i,,TEoF,,,L,,rM,, TENNECO CHEIVMCALS, INC. Mr. H. Ibanga Mr. P. Mango R. F. Fanter Al Flemington Al Piscataway CONTINUOUS COPOLYMER STRIPPER March 7, 1978 r,l'l0^^^Mr. R. E. Harmond Mr, J. K. Jacob Mr. M. Rosen As you are aware, Tenneco recently purchased Union Carbide's PVC plant. As part of the transaction, we received their technology. Union Carbide had samples of their copolymer slurry evaluated by B. F. Goodrich to de termine if the slurry could be stripped in BFG's continuous column. At tached is a copy of Union Carbide's correspondence on this subject. This information should be helpful in planning our trials at Artisan. In reviewing this information, note the following: 1. They tried to strip the slurry at atmospheric pressure, and got bad discoloration due to the high temperature. STfi'P VftM 2. They could not copolymer (VCM/vam) slurry because of excessive foaming. However, we use a different suspending agent than Union Car bide, so our results could be substantially different. 3. The BFG basic design is a pressure column. Thus, they go directly to a compressor. We. will need a vacuum pump, since we plan to strip under vacuum. Ihnuek. M/u Bano l Be The BFG design and estimate does not include a feed/bottoms exchanger. 5' BFG's steam rate is the same as the Pasadena design, when you subtract _out the steam a feed/bottoms exchanger would save. . The BFG column uses sieve trays vith DOWNCOMERS. 9 hlo 5AL>/AJ$ 7. The BFG column temperatures are: Ho 235 F. C Co 180 F. ,s uaj fe McompusVZD po-PAfA 7 Carbide states the process is diffusion limiting. 'Bac* 7#/s up 9. Note that the slurry feed to the column was "pulsed". They feed slurry for one (1) second, and then turned the feed off for up to fifty-nine (59) seconds. This sounds strange, but they report that it works! 10. They had discoloration problems in the feed tanks. RFF/bjl Robert F. Fanter COLORITE 006900