Document Ev1wKGw3Ne7JYL1wbRGwqeNg4

C. C. Neely Loc. 511 2000/3336 Tech Center UNION CARBIDE CORPORATION ENGINEERING, MANUFACTURING, AND TECHNOLOGY SERVICES DIVISION CENTRAL ENGINEERING P. 0. BOX 8361 SOUTH CHARLESTON, WEST VIRGINIA 25303 MEMORANDUM TO: COPY: FROM: SUBJECT: BUSINESS CONFIDENTIAL February 25, 1987 Mr. E. K. Harris- Bldg. 2000 HOC A. J. Montero Materials of Construction Recommendations . for IBT (Isobutvraldehvde Trlmer) Production ^CHIVED MAR 2 1987 CCN You are preparing a technology package to make UCAR Fllmer IBT (Isobutyraldehyde trlmer). This product will be made by Haltermann, a custom processor In Houston, Texas. You asked me to provide you with a statement for the technology package regarding the materials of construction for the IBT process. The materials of construction recommended for producing UCAR Fllmer IBT are: 1. Storage of IBAL (Isobutyraldehyde) - fresh and recycled IBAL should be stored In 304 SS, 316 SS, or aluminum tanks. Steel tanks can be used but they must be lined with a compatible lining such as Plaslte 3066 or Plaslte 9500. 2. Reaction - carbon steel Is the recommended material of construction for this part of the process. Types 304 SS and 316 SS are also acceptable materials of constructton. 3. IBAL Recovery - carbon steel Is also the material recommended for the recovery column and any equipment and piping associated with this column. Again, 304 SS and 316 SS are. also acceptable materials. 4. Flash System - carbon steel Is also the recommended material for all the equipment and piping In this system. Types 304 SS and 316 SS are also acceptable materials*:" 5. Refining System.- carbon, steel Is the recommended material for this system. Type 304 SS anO 316 SS are also acceptable materials. 6. Storage of IBT - carbon steel, 304 SS or 316 SS, or aluminum are can be used to store IBT. UCC 015835  received WAR 191987 CCN 7. Condensers and Coolers - carbon heat exchangers which use coolln compatible with the process stre, compatible with the cooling watei 8*. Gaskets - compressed asbestos, Te acceptable for handling the raw m 9. 0-rlng and Elastomers - the only i process streams Is EPR (also knowi temperature Is 45C (113F). Abo\ The above recommendations were based on 1. To prevent Iron contamination of the fresh and carbon steel Is not recommended. I amount of water and organic acid pr .2 Although there may be some Isobutyrl acid will not Increase the corrosion neutralized In the reaction system w catalyst. 3/j?/77 Compressed asbestos gaskets are nornu service when the temperature Is above aldehyde In the stream Is greater tha will not be made all the time, compre for streams containing more that 10% i 100*C. Field experience shows that 11 aldehyde to attack the binder In compr asbestos with an EPR binder will give asbestos with other binders. If you have any questions or comments concerr please feel free to call. mmc aoove recommendations. AJM/ds 1919H Index: B, 26, 28, 30, 32, 67, 71, 72, 81, 112, 113, 119, 120, 122, 131, 132, 138, 166, 187, 212, 273, 336 GJL h)L, UCC 015836 received MftRl9 1987 - 2 " CCN 7. Condensers and Coolers - carbon steel tubes may not be acceptable for heat exchangers which use cooling water. As stated, carbon steel Is compatible with the process streams. Whether carbon steel Is or Is not compatible with the cooling water has to be determined by Haltermann. 8.. Gaskets - compressed asbestos. Teflon, and grafoll gaskets are acceptable for handling the raw material and the process streams. 9. O-rlng and Elastomers - the only elastomer recommended for handling the process streams Is EPR (also known as EPT and EPDM). The maximum temperature Is 45*C (113F). Above this temperature. Teflon Is required. The above recommendations were based on the following: 1. To prevent Iron contamination of the fresh and recycled IBAL, bare carbon steel Is not recommended. Iron contamination Is affected by the amount of water and organic acid present In the aldehyde. 2. Although there may be some Isobutyrlc acid In the IBAL, the Isobutyrlc acid will not Increase the corrosion rate of steel because It will be neutralized In the reaction system with the sodium hydroxide used as a catalyst. _____ ________ ________ 3. Compressed asbestos gaskets are normally not recommended for aldehyde service when the temperature Is above 100eCand the concentration of the aldehyde In the stream Is greater than about'10%. However, since IBT will not be made all the time, compressed asbestos should be acceptable for streams containing more that 10X aldehyde and at temperatures above 100C. Field experience shows that It takes several years for the aldehyde to attack the binder In compressed asbestos. Compressed asbestos with an EPR binder will give better service than compressed asbestos with other binders. ____________ _________ --^ If you have any questions or comments concerning the above recommendations, please feel free to call. AJM/ds 1919H Index: B, 26, 28, 30, 32, 67, 71, 72, 81, 112, 113, 119, 120, 122, 131, 132, 138, 166, 187, 212, 273, 336 UCC 015837