公开(公告)号：US4112046A

公开(公告)日：1978-09-05

申请号：US747261

申请日：1976-12-03

申请人： Hans Niederprum ,  Johann-Nikolaus Meussdoerffer ,  Hans-George Nieder-Vahrenholz ,  Wolfgang Bockelmann

发明人： Hans Niederprum ,  Johann-Nikolaus Meussdoerffer ,  Hans-George Nieder-Vahrenholz ,  Wolfgang Bockelmann

IPC分类号： C01G37/14 ,  C22B5/04 ,  C22B34/32 ,  C01B33/26

CPC分类号： C22B34/32 ,  C22B5/04 ,  Y02P10/234

摘要： In the disintegration of at least one chromium source selected from the group consisting of a SiO.sub.2 -containing chromite and a chromium-containing residue with an alkali compound at a temperature above about 800.degree. C in the presence of atmospheric oxygen and a lime-free diluent, followed by leaching of the mixture with at least one of water and/or a chromium (VI)-containing aqueous solution, the improvement which comprises including in the mixture to be disintegrated an aluminum compound and at least sufficient alkali to form alkali chromate and to convert the SiO.sub.2 into an alkali-aluminum silicate corresponding to the formula nMe.sub.2 O . mSiO.sub.2 . Al.sub.2 O.sub.3, wherein Me is at least one of sodium and potassium, 0.8 .ltoreq. n .ltoreq. 1.2 and 1.3 .ltoreq. m .ltoreq. 4.3.

摘要翻译： 在大气氧气和无石灰稀释剂的存在下，在高于约800℃的温度下，将至少一种选自含SiO 2的铬铁矿和含铬残渣的铬源分解 ，然后用至少一种含水和/或含铬（VI）的水溶液浸出混合物，其改进包括在混合物中包含铝化合物和至少足够的碱以形成碱式铬酸盐， 将SiO 2转化为对应于式nMe 2 O的碱 - 硅酸铝。 mSiO2。 Al 2 O 3，其中Me是钠和钾中的至少一种，0.8≤n≤1.3且1.3≤3.4。