Cement copper (266-964-1)
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Substance description/characteristics

  1. Name and other identifiers of the substance:

The substance Cement copper is a UVCB (origin: inorganic)

Public name: High Grade Cement Copper

Substance identity:
EC number: 266-964-1
EC name: Cement copper
CAS number (EC inventory): 67711-88-0
IUPAC name: Insoluble copper-containing residue after precipitation of copper bearing solutions
Description:

During the zinc refining process, cement copper is obtained when adding

- a reducing agent i.e. Zinc powder, Fe-powder, Al-powder, H2, ...- to the Copper loaded Zinc Sulphate solution and precipitation (cementation) of a Copper-rich precipitate.

- a neutralizing agent (e.g. Zinc oxide, Na(OH), ...).to the Copper loaded Zinc Sulphate solution and precipitation (hydrolysis) of a Copper-rich precipitate.

- Cu+ containing solution to a Cl- containing Zinc Sulphate solution, or a reducing agent if the Zinc Sulphate solution is Cu++ rich, and precipitation of a CuCl rich precipitate

After settling step, the precipitate is optionally re-pulped in a second reaction tank with a slightly acidic sulphate solution i.o.t. dissolve the excess of unreacted zinc powder and potentially co-precipitated Cadmium. The Copper-rich precipitate can be washed and filtered out of the suspension using press-filters
Molecular formula:  n.a.
Molecular weight range:  n.a.

 

  1. Composition of the substance

Cement copper has 2 composition ranges. It will thus also have 2 classifications. Please download composition information from document at the bottom of the page. 

  1. Classification

Please download classification information from document at the bottom of the page. 

Section 3 of CSR: Classification and labelling. Self classification of the intermediate according to DSD/DPD and CLP/GHS. Unless specific data were provided, the toxicity mixture rules were applied.
(Size : 0.06 MB)
Section 1.2 of CSR: composition of the intermediate
(Size : 0.03 MB)
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