Patent
Process for the utilization of vanadium from chromium ore as vanadium (V) oxide
Rainer Weber,Block Hans-Dieter,Michael Batz,Halstenberg Jost,Lumm Michael,Roland-Luiz Roth,Dawie Van Der Merre +6 more
Reads0
Chats0
TLDR
In this paper, the vanadium present in the chromium ore chromite is recovered as vanadium pentoxide during the course of the fusion of chromium with alkali and its work-up to produce sodium chromate solution and sodium dichromate.Abstract:
Process wherein the vanadium present in the chromium ore chromite is recovered as vanadium pentoxide during the course of the fusion of the chromium ore with alkali and its work-up to produce sodium chromate solution and sodium dichromate.read more
Citations
More filters
Patent
Titanyl phthalocyanine photoconductors
Jin Wu,Satchidanand Mishra,Kathleen M. Carmichael,Anthony M. Horgan,Kent J. Evans,Geoffrey M. T. Foley,Yonn K. Rasmussen,Edward F. Grabowski,Liang-Bih Lin +8 more
TL;DR: In this article, a photoconductor containing an optional supporting substrate, a photogenerating layer, and at least one charge transport layer is described, where the photogeneating layer contains a titanyl phthalocyanine prepared by dissolving a Type I titanyl PHTHC in a solution comprising a trihaloacetic acid and an alkylene halide.
Patent
Method for extracting vanadium and chromium from materials containing vanadium or/and chromium
TL;DR: In this paper, a method for extracting vanadium and chromium from materials containing the vanadium or/and the chromium is characterized by comprising the following steps: taking salt and alkali of alkali metal or the alkali ion as an oxidation transformation medium, and carrying out treating for 0.5-6 hours at the temperature of 160-600 DEG C under the effect of an oxidizing agent and enabling vanadium/chromium in the materials to be converted into soluble vanadate and soluble chromate; carrying out water leaching to obtain leaching liquor containing the
Patent
Purification method of high-chrome vanadium-contained raw material
TL;DR: In this article, a purification method of a high-chrome vanadium-contained raw material was proposed, which is based on primary roasting at the temperature of 400 to 600 DEG C to obtain vanadium oxide, and a third precipitating agent was added for lixiviating and precipitating vanadium.
Patent
Process for extracting vanadium from vanadium slag
TL;DR: In this article, a process for extracting vanadium from vanadium slag is described, and the process comprises the following steps: adding water and sodium bicarbonate into vanadium-removed slag to prepare slurry, heating, stirring, and filtering to obtain calcium carbonate filter residue and filtrate; merging the filtrates and the washing water to obtain a conversion solution, wherein the conversion dissolution rate of the vanadium is greater than 94.29 percent; concentrating the conversion solution until the content of vanadium was greater than 10 g/L;
Patent
Method for reducing content of sodium in vanadium-containing leaching solution
TL;DR: In this article, a method for reducing the content of sodium in vanadium-containing leaching solution is proposed to solve the technical problems that at present, the contents of the sodium in the vanadium containing leach solution is relatively high, consequently, the following process is long and tedious, and the purity of vanadium pentoxide is relatively low.
References
More filters
Patent
Process for the preparation of sodium dichromate
TL;DR: In this paper, a process for the preparation of dichromate and sodium dichromates is described, in which the mixture of the monochromate ions is converted into the dichromatic ions by electrolysis and/or by reaction with carbon dioxide under pressure and crystallization of this solution.
Patent
Process for the production of sodium dichromate
Norbert Dr. Lönhoff,Bernhard Dr Spreckelmeyer,Hans-Dieter Dr Block,Rainer Weber,Jost Halstenberg,Bernd Rosenow +5 more
TL;DR: In this article, a process for the production of sodium dichromate and sodium monochromate solutions by oxidative roasting of chrome ores under alkaline conditions is described, characterized in that the acidification is carried out with carbon dioxide under pressure with removal of sodium hydrogen carbonate.
Patent
Vanadium recovery from chromates
TL;DR: In this article, an improved method of treating chromite ore containing vanadium was proposed for the production of alkali-metal chromates, more particularly for the extraction of vanadium-rich chromates.