Verfahren zur Gewinnung von Titandioxid aus Aufschlussrückständen eines Sulfatverfahrens
摘要
The invention relates to methods for obtaining titanium dioxide from pulping residues which are produced as waste from a conventional sulfate pulping procedure. The invention especially relates to methods for obtaining titanium dioxide from pulping residues produced by a sulfate pulping procedure. Said methods comprise the following steps: (a) the pulping residues are mixed with sulfuric acid and optionally other titanium-containing raw materials in such a way that between 60 and 100 wt. % of the TiO2 used is in the form of pulping residues and between 0 and 40 wt. % of the TiO2 used is in the form of standard raw materials; (b) the pulping reaction is started with fuming sulfuric acid or water or diluted sulfuric acid; (c) the obtained reaction product is dissolved; (d) the undissolved solid materials are separated from the liquid phase; and (e) titanium dioxide is obtained from the liquid phase.
申请公布号
DE10106539(A1)
申请公布日期
2002.08.22
申请号
DE20011006539
申请日期
2001.02.13
申请人
KERR-MCGEE PIGMENTS GMBH & CO. KG
发明人
AUER, GERHARD;VINCENTZ, GEORG;JULIUS, UDO;ROESSLER, HELMUT;LAUBACH, BENNO;BAUMANN, FRANK;KREMER, ALFRED;SCHUY, WERNER