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incineration of CU2+ salt of chlorpphenols gives less PCDD/F?

  jansson & sundstrom 'Formation of PCDD During Combustion of Chlorphenol
  Formulations' _Sci Tot Env_  1-:209-17 ('79)  (authors are/were with
  swedish EPA)
  have results giving the technical grade copper salt of 2,3,4,6-TeCP
  10-10,000 times less 2-8 CDD than the sodium salt of the same CP, across
  500 - 850 Deg. C combustion T's.
  can anyone offer a reason for such a result, given that Cu is supposed to
  be the best catlyst for PCDD formation?  the article does not describe the
  sampling point (other than it being flue gas) on their pilot scale plant.
  they cite ahling et al _chemosphere_ 6  ('77) p/437 & p. 461 for more
  fyi, table 1 shows the 4-8 CDD/F contents (this was before people were
  grouping homolgues by 2,3,7,8 substitution or not) of the 4 CP formulations
  tested, before combustion:
  2,4,6-TCP, K+:                  11 ppm dioxins           158   ppm furans
  2,3,4,6-TeCP, Na+:             6.4 ppm                      12.5 ppm
  2,3,4,6-TeCP, Cu++:           2.4 ppm                      14    ppm
  PCP:                                   12.3 ppm                        9.6 ppm
  on a lighter note, _Not Man Apart_ 13:3:9-10 (4/83), 'the Tragedy at Times
  Beach', which gives some details on the path of NEPACCo's hexachlorophenate
  manfacturing wastes sold to Russell Bliss, notes that 'Bob's Home Service'
  (!) was Missouri's only licesnsed haz waste facility.
  Tony Tweedale (Causality is a concept not subject to empirical
  demonstration.   -David Hume)