公开(公告)号：US5219829A

公开(公告)日：1993-06-15

申请号：US787332

申请日：1991-11-04

Applicant: Gerd Bauer ,  Matthias Kuntz ,  Ingrid Grobelsek ,  Dirk Reyermann ,  Gunter Nimtz

Inventor： Gerd Bauer ,  Matthias Kuntz ,  Ingrid Grobelsek ,  Dirk Reyermann ,  Gunter Nimtz

IPC: C01B13/14 ,  C01B13/18 ,  C01G1/00 ,  C01G1/02 ,  C01G3/00 ,  C01G3/02 ,  C01G25/02 ,  C01G51/00

CPC classification number: C01B13/185 ,  C01G25/02 ,  C01G3/006 ,  C01G51/006 ,  C01P2002/88 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/80 ,  C01P2006/82 ,  Y10S505/737

Abstract: The invention relates to a process and an apparatus for converting metal nitrate or mixed metal nitrate solutions into the corresponding metal oxides in a microwave field. The invention consists in heating, while the feed stream is being metered in, in such a manner that the solvent always evaporates within seconds and the decomposition product is obtained as a porous, sponge-like, purely oxidic material, which can be ground easily to give a powder having particle sizes of 0.5 to about 10 .mu.m. The controlled metering in of the nitrate solution simultaneously makes it possible to control the reaction temperature below the sintering temperature of the powder. The reaction of the nitrate starting solution can take place continuously/batchwise in a reaction flask or continuously in a rotating reaction pipe, which is preferably charged with grinding balls, which possibly exert a reaction-activating effect similar to that exerted very particularly by the metal oxide sponge formed during the reaction.

Abstract translation: 本发明涉及在微波场中将金属硝酸盐或混合金属硝酸盐溶液转化成相应的金属氧化物的方法和设备。 本发明包括加热，同时进料流量以这样的方式进行计量，使得溶剂在数秒内始终蒸发，并且分解产物获得为多孔的海绵状纯氧化材料，其可以容易地研磨 得到粒径为0.5〜10μm的粉末。 硝酸盐溶液的受控计量同时使得可以将反应温度控制在粉末的烧结温度以下。 硝酸盐起始溶液的反应可以在反应烧瓶中连续/间歇地进行，或者连续地在旋转的反应管中进行，该反应管优选装入研磨球，该研磨球可能发挥类似于金属非常特别地发挥的反应活化作用 氧化物海绵在反应过程中形成。