摘要:
A process for the production of a mixed oxide powder, that contains as chief constituent TiO.sub.2 in the form of anatase and as minor constituents at least one of the catalytically active oxides MoO.sub.3, WO.sub.3 and V.sub.2 O.sub.5, suitable for use as a catalyst for the removal of nitrogen oxides, comprising (a) partially neutralizing a titanium dioxide hydrate suspension containing sulphuric acid with an alkaline liquor to a pH value between about 4.0 and 6.0 at temperatures between about 20.degree. and 100.degree. C., (b) filtering the suspension from (a) to produce a filter cake and intensively washing the filter cake, (c) adding to the filter cake from (b) at least one water-soluble salt of at least one of the metals Mo, W and V in solid or dissolved form, and (d) drying the filter cake from (c) and calcining it at a temperature between about 300.degree. and 750.degree. C.
摘要翻译:一种混合氧化物粉末的制造方法,其包含主要成分为锐钛矿形式的TiO 2和作为少量成分的至少一种催化活性氧化物MoO 3,WO 3和V 2 O 5的方法,适合用作除去 氮氧化物,其包含(a)在约20℃至100℃的温度下,将含有碱性液的硫酸的二氧化钛水合物悬浮液部分中和至约4.0至6.0之间的pH值,(b)将( a)生产滤饼并强烈地洗涤滤饼,(c)从(b)至少一种金属Mo,W和V的至少一种水溶性盐固体或溶解形式的滤饼中加入滤饼 ,(d)将(c)的滤饼干燥,并在约300〜750℃的温度下煅烧。
摘要:
The invention relates to finely divided, highly pure neutral zinc oxide powder used for UV protection in cosmetic sun screen preparations and daytime skin care preparations as well as in lacquers and plastics, and to a process for its preparation.
摘要:
A process for the preparation of very pure titanium dioxide by reacting titanium tetrahalides with sulphuric acid, hydrolysis the titanyl sulphate solution obtained and calcining the hydrolysate is disclosed wherein the reaction between titanium tetrahalide and aqueous 20-40% by weight strength sulphuric acid is performed in such a way that crystallisation of titanyl sulphate does not take place, the hydrogen halide is separated, the solution is optionally concentrated and filtered and then the ratio by weight of sulphuric acid to titanium dioxide is adjusted to between 1.7 and 2.0 and the titanium dioxide concentration is adjusted to between 250 and 300 g/l, the solution is hydrolyzed and the resulting titanium oxide hydrate is filtered off and calcined to give Futile or anatase.
摘要:
The present invention relates to inorganic pigment pellets for coloring building materials, lacquers and plastics and to a process for the production thereof and to the use thereof inter alia for the production of pastes, suspensions and emulsion paints.
摘要:
The present invention relates to intermediate layers of inorganic materials in electroluminescent arrangements which contain finely divided inorganic particles (nano-particles) dispersed in a polymer binder.
摘要:
The invention relates to granules of inorganic pigments, a process for their production using several auxiliary substances by compacting and their use in many technical fields.
摘要:
Pigment preparations having a solids content of greater than 40% comprise, as dispersing agents, polymers having recurring succinyl units, in particular polyaspartic acid.