This excerpt taken from the PBR 6-K filed Nov 17, 2006.
c) AGE Deliberation of PETROQUISA
On October 31, 2006 at the Extraordinary General Meeting of PETROQUISA approved:
As proposed by the Board of Directors in Meeting n.604 on September 22, 206, the registration cancellation of Petrobras Quimica S.A. PETROQUISA as an open company together with the Comissão de Valores Mobiliários CVM as its shares are no longer being traded on the Exchange or the over the counter.
The Protocol and Justification for the Operation to Incorporate PETRORIO PETROQUÍMICA DO RIO DE JANEIRO S.A. through PETROBRAS QUÍMICA S.A. PETROQUISA was approved by the Board on September 22, 2006.