pH-Spectrum of
Bayer Liquor Copper - Complex

Experimental:

System Cu - (1 mmol/L CuCl₂ x 2 H₂O / dist. water),
System Al - (1 mmol/L AlCl₃ x 6 H₂O / dist. water),
System (Cu+ST) - (1 mmol/L CuCl₂ / 500 µl Bayer Liquor / dist. water),
System (Cu2+ST2) - (2.5 mmol/L CuCl₂ / 500 µl Bayer Liquor / dist. water),
System (Al+ST) - (1 mmol/L AlCl₃ / 500 µl Bayer Liquor / dist. water),
System ST/ST2 - (500 µl Bayer Liquor / dist. water)

Results:

- The pH-Spectrum of Bayer Liquor ADCTAC1 ST - Cu Complex

Fingerprints

System Cu: The forming of Cu(OH)₂ between pH 6.3 and pH 7.5 could be shown.
System Al: The forming of Al(OH)₃ between pH 4.4 and pH 8.2 could be shown.

Systemprints

System (Cu+ST): The forming of a copper complex with parts of Bayer Liquor in the pH area of 4.7 to 12.4 could be shown.
System (Al+ST): The forming of a aluminium complex with parts of Bayer Liquor in the pH area of 1.8 to 12.5 could be shown.

- The pH-Spectrum of Bayer Liquor ADCTAC1 ST

Fingerprints

System ST/ST2: At pH 11.1 the protonation of Bayer Liquor begins, the mistake for the pH-value is ± 0.1.

Systemprints

System (Cu+ST/Cu2+ST2): At pH 11.1 the titration of the Bayer Liquor begins. A higher concentration of CuCl₂ x 2 H₂O in System (Cu2+ST2) slows down the protonation of the unknown complexing agent, which is part of Bayer Liquor.