Document LJ330aBLn6nyoEw9QDYemVwvq

Vista Chemicol Company January 23, 1989 15990 North Barker's Landing Road Post Office Box 19029 Houston, Texos 77224 Phone (713) 531-3200 TGG. JSC: XP. friO: $= --- --------- Mr. Bob Smith Document Control Office Chemical Inventory Section, USEPA Office of Toxic Substances 401 M Street* N.W. Washington, D. C. TS-790 Dear Bob: Based on recent discussions regarding the June 8, 1988 letter (attached) proposing to correct certain inventory listings for Vista Alkylate and Specialty Alkylate products Vista is proposing the descriptions attached as diagram 1, 2, and 3. These diagrams are similar to those submitted with our June 8 letter. The proposed descriptions will achieve the following. 1. Correct 1978 submissions in regards to boiling point changes that have occurred as a result of boiling point methodology changes and minor changes in process feedstock character. The chemical identify of the products has not changed since 1978. 2. Provide stream type description for our process feedstocks rather than considering the paraffin feed a mixture of individual homolog paraffins. 3. Provide alkylate product and specialty alkylate descriptions that are consistent with the feedstock stream descriptions and consistent with current inventory descriptions for other similar alkylate products. These proposed descriptions also allow for a clear feedstock to precursor to bottoms sequence. The above is based on our mutual determination that we improperly listed our products on the inventory in 1978. These products could have been given a simple individual stream description. The carbon ranges proposed are based on the SDA terminology method in Volume 1 of the inventory and your assessment of the carbon range distribution for the products that was provided to you in our letters of August 5, 1987, and June 8, 1988. Both are attached. VVV 000006693 \ \\ Mr. Bob Smith January 23, 1989 Page 4 Please let us know what corrections. We will be necessary. the next happy to step meet is to proceed with these with you in Washington if Sincerely, Thomas G. Grumbles, C.I.H. Environmental Quality Manager aij Attachment cc: Da Young Lee - EPA bcc: L. R, Bauer-BALT, J. W. Ware-LCLAB, W. L. McClain vvv 000006694 VVV 0 0 0 0 0 6 6 9 5 NORMAL PARAFFIN FEED Alkanes C^-14 desulfurized DETERGENT ALKYLATE PRODUCT Benzene mono C12-14, alkyl derivs. Benzene, mono Cf2-14 alkyl derivs. fractionation bottoms, light fraction Descriptor: A light fraction resulting from the distillation of C^-u alkylbenzenes fractionation bottoms, boiling predominately above 595*F. CO or LU Benzene, mono Cj2>14 alkyl derivs. fractionation bottoms Descriptor: A complex residitni resulting from the distillation of c12-14 alkyLbenzenes and boiling predominately above 595*F. Benzene, mono Cj2-I4r alkyl derivs., fractionation bottoms, heavy fraction Descriptor: A heavy fraction resulting from the distillation of Ci2*i4 alkylbenzenes fractionation bottoms, boiling predominately above 630*F li r O 5 *f / distillatioN TOWER D e s c rip to r: A complex residium re su ltin g from the d is tilla tio n of Ciq -14 alkylbenzenes and b o ilin g predom inately above 59QF. 1/ ^ DISTILLATION -fc. Towers)--^ g* " ? 2 O2 M2 Q.1 2.3 v> " 5* *3* fU> -D <CQ! ft ft - T *<7 2 5O ft 0y o tt 1 gj* OSffS 3^ D escriptor: A heavy fra c tio n re s u ltin g from the d is tilla tio n of alkylbenzenes fra ctio n a tio n bottoms, b o ilin g predominately above *- *-- 2 0Q000<.^6 NORMAL PARAFFIN FEED. Alkanes C10-13 desulfurized DETERGENT ALKYLATE PROPUCI Benzene mono CIO* 13, alkyl derivs. Benzene, mono Cip-13 alkyl derivs. fractionation bottoms, light fraction Descriptor: A light fraction resulting from the distillation of Ciq-13 alkylbenzenes fractionation bottoms, boiling predominately above 590F. tA f > > > O < f-- CO Q Benzene, mono C^q-13* fractionation bottoms V derive, Descriptor: A corplex residium resulting from the distillation of CiO-13 alkylbenzenes and boiling predominately above 590-F. V Benzene, mono Cjo-13* alkYl derivs., fractionation bottoms, heavy fraction Descriptor: A heavy fraction resulting from the distillation of C-jo-13 alkylbenzenes fractionation bottoms, boiling predominately above 630F A 0000066^7