摘要:
The invention relates to a material made up of particles of an optionally-doped fluorosulphate. The fluorosulphate has a disdtorted Tavorite type structure of formula (A 1-a A' a )x(Z 1-b Z' b )z(SO 4 ) s F f (I) where A = Li or Na, A' 0 a hole or at least one doping element, Z = at least one element selected from Fe, Co and Ni, Z' = a hole or at least one doping element, the indices a, b, x, z, s, and f are selected to assure the electroneutrality of the compound and a ≥0, b≥0, x≥0, z>0, s>0, f>0, the respective quantities a and b of dopant A and Z' being such that the Tavorite type structure is preserved. The material is obtained from the precursors thereof by an ionothermal route or ceramic route in a closed reactor. The material is of particular use as an active electrode material.
摘要:
L'invention se rapporte à un sulfate ferreux heptahydraté technique traité pour éliminer des traces d'eau intercristalline contenant de l'acide libre et ainsi le rendre susceptible d'écoulement libre. Le traitement consiste à le mélanger avec des phosphates calciques anhydres broyées finement, contenant au moins un atome de calcium pour un atome de phosphore. Au contact de l'acide sulfurique, il se forme à partir d'orthophosphates tri ou bicalciques, ou leur précurseur pyrophosphate et métaphosphate, des orthophosphates bi ou monocalci- ques, qui cristallisent avec de l'eau de substitution. A partir d'un sulfate ferreux brut, qui s'agglomère en masses, on obtient des produits parfaitement fluides contenant de 90 à 97 % de cristaux de sulfate de fer heptahydraté, et d'aspect très voisin du sulfate ferreux heptahydraté. On peut associer ce traitement à un traitement classique, tel que mélange avec un sulfate ferreux partiellement déshydraté et un neutralisant tel que carbonate de calcium. Par ailleurs le procédé est applicable à d'autres sulfates métalliques hydratés cristallisés, sulfate cuivrique, sulfates d'aluminium, de magnésium et de zinc.
摘要:
A process for generating a metal sulfate that involves crystallizing a metal sulfate from an aqueous solution to form a crystallized metal sulfate in a mother liquor with uncrystallized metal sulfate remaining in the mother liquor; separating the crystallized metal sulfate from the mother liquor; basifying a portion of the mother liquor to convert the uncrystallized metal sulfate to a basic metal salt; and using the basic metal salt upstream of crystallizing the metal sulfate. So crystallized, the generated metal sulfate may be battery-grade or electroplating-grade.
摘要:
A process for generating a metal sulfate that involves crystallizing a metal sulfate from an aqueous solution to form a crystallized metal sulfate in a mother liquor with uncrystallized metal sulfate remaining in the mother liquor; separating the crystallized metal sulfate from the mother liquor; basifying a portion of the mother liquor to convert the uncrystallized metal sulfate to a basic metal salt; and using the basic metal salt upstream of crystallizing the metal sulfate. So crystallized, the generated metal sulfate may be battery-grade or electroplating-grade.
摘要:
[Problem] The present invention addresses the problem of providing: a novel low-cost positive electrode material for sodium ion secondary batteries, which has a high redox potential; and a sodium ion secondary battery which uses this material as a positive electrode active material. [Solution] A positive electrode active material for sodium ion secondary batteries, which is characterized by containing a sulfate represented by Na m M n (SO 4 ) 3 (wherein M represents a transition metal element; m is 2 ± 2x (wherein x satisfies 0 ≤ x ≤ 0.5); and n is 2 ± y (wherein y satisfies 0
摘要翻译:发明内容本发明解决了提供一种具有高氧化还原电位的新型低成本钠离子二次电池用正极材料的问题。 以及使用该材料作为正极活性物质的钠离子二次电池。 [解决方案]一种钠离子二次电池用正极活性物质,其特征在于含有由Na m M n(SO 4)3表示的硫酸盐(其中M表示过渡金属元素; m为2±2×(其中x满足 0‰×‰¤0.5); n为2±y(其中y满足0
摘要:
The present invention relates to a nanoparticulate composition, comprising nanoparticles having a particle size distribution of d 90 ≤ 10 μm, and optionally a surface-active agent. The present invention further relates to a method for the production of such a nanoparticulate composition.
摘要:
The present disclosure provides a method for recycling ferrous sulfate heptahydrate and sulfuric acid from a waste acid in titanium dioxide production, including the following steps: step 1: pre-concentrating the waste acid in titanium dioxide production to obtain a pre-concentrated acid; step 2: cooling the pre-concentrated acid by a heat exchanger, and conducting freezing crystallization for a period of time to obtain the ferrous sulfate heptahydrate and a crystallization mother liquor; step 3: concentrating the crystallization mother liquor in a waste acid evaporation system to obtain precipitated miscellaneous salt-containing suspended concentrated acid and evaporation condensed water; and step 4: subjecting the precipitated miscellaneous salt-containing suspended concentrated acid to maturing and cooling, and then transferring a resulting product into a filter press dehydration system to allow a treatment to obtain a metal miscellaneous salt filter cake and a filtered finished acid.