专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4721608A Spheroidal alkali metal polyphosphates of low apparent density, and process for making them 失效
标题翻译：低密度的球状碱金属多磷酸盐及其制备方法
公开(公告)号：US4721608A
公开(公告)日：1988-01-26
申请号：US847485
申请日：1986-04-03
申请人： Werner Kowalski , Hans Haas , Theo Dahmen , Markus Erpenbach
发明人： Werner Kowalski , Hans Haas , Theo Dahmen , Markus Erpenbach
IPC分类号： B01D1/18 , C01B25/41 , C01B15/16 , C01B25/26
CPC分类号： B01D1/18 , C01B25/412
摘要： Alkali metal polyphosphates consisting substantially of hollow spheroidal particles with an apparent density of less than 350 g/l are made. To this end, an alkali metal orthophosphate solution is forced under a pressure of 6-40 bars into a fluidization zone; the orthophosphate solution is fluidized in the fluidization zone by injecting a finely dispersed permanent gas maintained under a pressure higher than the orthophosphate solution; and the fluidized orthophosphate solution is sprayed with the aid of a plurality of single medium nozzles arranged downstream of the fluidization zone through a flame zone peoduced inside the spray tower. Apparatus for carrying out the process.
摘要翻译：制成基本上由表观密度小于350g / l的中空球状颗粒组成的碱金属多磷酸盐。为此，在6-40巴的压力下将碱金属正磷酸盐溶液压入流化区; 通过注入保持在高于正磷酸盐溶液的压力下的细分散的永久气体，在流化区中流化正磷酸盐溶液; 并且借助于布置在流化区下游的多个单一介质喷嘴通过喷雾塔内部的火焰区喷射流化的正磷酸盐溶液。用于执行该过程的装置。

2. 发明授权

US4968490A Spheroidal alkali metal polyphosphates of low apparent density, and apparatus for making them 失效
标题翻译：低密度的球状碱金属多磷酸盐及其制造方法
公开(公告)号：US4968490A
公开(公告)日：1990-11-06
申请号：US74096
申请日：1987-07-16
申请人： Werner Kowalski , Hans Haas , Theo Dahmen , Markus Erpenbach
发明人： Werner Kowalski , Hans Haas , Theo Dahmen , Markus Erpenbach
IPC分类号： B01D1/18 , C01B25/41
CPC分类号： B01D1/18 , C01B25/412
摘要： Alkali metal polyphosphates consisting substantially of hollow spheroidal particles with an apparent density of less than 350 g/l are made. To this end, an alkali metal orthophosphate solution is forced under a pressure of 6-40 bars into a fluidization zone; the orthophosphate solution is fluidized in the fluidization zone by injecting a finely dispersed permanent gas maintained under a pressure higher than the orthophosphate solution; and the fluidized orthophosphate solution is sprayed with the aid of a plurality of single medium nozzles arranged downstream of the fluidization zone through a flame zone produced inside the spray tower. Apparatus for carrying out the process.

3. 发明授权

US4717557A Spheroidal alkali metal polyphosphates of low apparent density, and process for making them 失效
标题翻译：低密度的球状碱金属多磷酸盐及其制备方法
公开(公告)号：US4717557A
公开(公告)日：1988-01-05
申请号：US847492
申请日：1986-04-03
申请人： Werner Kowalski , Hans Haas , Theo Dahmen , Markus Erpenbach
发明人： Werner Kowalski , Hans Haas , Theo Dahmen , Markus Erpenbach
IPC分类号： B01D1/18 , C01B25/41 , C01B15/16 , C01B25/26
CPC分类号： C01B25/412 , B01D1/18
摘要： Alkali metal polyphosphates consisting substantially of hollow spheroidal particles with an apparent density of less than 320 g/l are made. To this end, an aqueous alkali metal orthophosphate solution and an aqueous solution of an inflating agent are simultaneously forced under a pressure of 6-40 bars into a fluidization zone; the two solutions are fluidized in the fluidization zone by injecting a finely dispersed permanent gas maintained under a pressure higher than the two solutions and the fluidized solutions are sprayed with the aid of a plurality of single medium nozzles arranged downstream of the fluidization zone through a flame zone produced inside the spray tower. Apparatus for carrying out the process.
摘要翻译：制成基本上具有小于320g / l的表观密度的中空球状颗粒的碱金属多磷酸盐。为此，在6-40巴的压力下同时迫使碱金属正磷酸盐水溶液和充气剂的水溶液进入流化区; 通过注入保持在高于两种溶液的压力下的细分散的永久气体，借助于布置在流化区下游的多个单一介质喷嘴通过火焰喷射流化溶液，两种溶液在流化区中流化在喷雾塔内产生的区域。用于执行该过程的装置。

4. 发明授权

US4399114A Process for the dearsenification of polyphosphoric acid 失效
标题翻译：多磷酸脱砷方法
公开(公告)号：US4399114A
公开(公告)日：1983-08-16
申请号：US402941
申请日：1982-07-29
申请人： Alexander Maurer , Gero Heymer , Markus Erpenbach
发明人： Alexander Maurer , Gero Heymer , Markus Erpenbach
IPC分类号： C01B25/24 , C01B25/16
CPC分类号： C01B25/24
摘要： The disclosure relates to a process for the continuous dearsenification of polyphosphoric acid with the aid of hydrogen sulfide in a gas admission zone. To this end, the disclosure provides for the acid to be dearsenified in a gas admission zone subdivided so as to comprise at least two separate liquid matter-receiving zones, each zone being separated from the other by means of a separate gas zone; for the liquid in each of the liquid matter-receiving zones to be maintained at a level 0.1 up to 10 cm high, without admission of gas; for hydrogen sulfide which remained unreacted in the individual liquid matter-receiving zones to be collected in the respective gas zone and for it to be finely redispersed in the liquid matter-receiving zone directly upstream of the respective gas zone by allowing the hydrogen sulfide to flow through a plurality of openings into the acid, the latter being delivered from the respective liquid-matter-receiving zone into the next downstream liquid-matter-receiving zone, and introduced thereinto directly below the liquid matter level therein; for precipitated arsenic sulfide to be separated from the acid coming from the lower end of the gas admission zone, and for the filtrate obtained to be freed from gaseous hydrogen sulfide in excess.
摘要翻译：本公开涉及在气体入口区借助硫化氢连续脱砷多磷酸的方法。为此，本公开内容提供了在气体进入区域中进行脱砷的酸，其被细分为包括至少两个分离的液体物质接收区域，每个区域通过单独的气体区域与另一个区域分离; 使每个液体物质接收区域中的液体保持在0.1至10厘米高的水平，而不允许气体; 对于在各个液体物质接收区中保持未反应的硫化氢，其被收集在各个气体区中，并且通过允许硫化氢流动直接在各个气体区的上游被精细地再分散在液体物质接收区中通过多个开口进入酸，后者从相应的液体接收区输送到下一个下游液体接收区，并直接在其中引入液体物质的下方; 使沉淀的硫化砷与气体入口区的下端的酸分离，得到的过滤得到的无水硫化氢的滤液。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式