9results about "Sulfate preparation" patented technology

A treatment process for crystallizing a metal sulfate involving pre-treating a feedstock comprising calcium, magnesium, and / or lithium impurities, the pre-treating involving pre-leaching the feedstock in the presence of a lixiviant, selectively extracting a first portion of any of the impurities from the feedstock, and forming a leached solution comprising an uncrystallized metal sulfate and any remaining impurities; and / or refining the leached solution and removing a second portion of any of the remaining impurities; and crystallizing the uncrystallized metal sulfate from the leached solution to form a crystallized metal sulfate. So processed, the crystallized metal sulfate may be battery-grade or electroplating-grade.

A recycling method based on lithium-ion battery powder includes the following steps: pulping the lithium-ion battery powder to obtain a slurry; mixing sulfuric acid, a reducing agent, and the slurry, followed by a first-stage leaching and filtration operation to obtain a first leachate and a first leaching residue; subjecting the first leachate to P2O4 extraction to remove impurities, obtaining a battery-grade nickel-cobalt-manganese solution; mixing the sulfuric acid, the reducing agent, and the first leaching residue, followed by a second-stage leaching and filtration operation to obtain a second leachate and a second leaching residue; subjecting the second leachate to impurity removal filtration to obtain a filtrate and a filter residue; and subjecting the second leaching residue to high-acid leaching and filtration to obtain battery-grade graphite raw material; wherein the pH value in the first-stage leaching and filtration operation is 4-6; and the pH value in the second-stage leaching and filtration operation is 1-2.

The invention provides a separation and purification method and system for a deuterated formic acid electrolyte. The method comprises the following steps: performing cation exchange on a deuterated formic acid electrolyte to obtain a deuterated formic acid heavy water solution containing deuterated sulfuric acid; carrying out atmospheric distillation on the deuterated formic acid heavy water solution containing deuterated sulfuric acid to respectively obtain a dilute deuterated formic acid heavy water solution and deuterated sulfuric acid; carrying out pressurized rectification on the dilute deuterated formic acid heavy water solution to respectively obtain heavy water and primary purified deuterated formic acid; and carrying out reduced pressure rectification on the primary purified deuterated formic acid to respectively obtain secondary purified deuterated formic acid and a deuterated formic acid-heavy water mixed solution. According to the separation and purification method of the deuterated formic acid electrolyte, deuterated formic acid can be purified from the deuterated formic acid electrolyte, heavy water, deuterated sulfuric acid and deuterated sulfate in the deuterated formic acid electrolyte can be recycled, and the economical efficiency of the method is improved.

This electrode contains a compound which contains Li, at least one element selected from among Group 3 to Group 15 elements, and S, wherein a peak intensity Ra of SO3- and a peak intensity Rb of SO4- obtained by negative ion analysis through time-of-flight secondary ion mass spectrometry satisfy Ra>Rb.

A process and method for producing a crystallized metal sulfate. The crystallized metal sulfate may be battery-grade. The method may comprise receiving a metal ion-containing stream and crystalizing a metal sulfate from the stream. The process may comprise receiving a stream from a metal processing plant, and crystalizing a metal sulfate from the stream. The process may be a metal electrowinning process comprising crystalizing a metal ion-containing stream to form a crystallized metal sulfate in a mother liquor. The process or method may comprise returning the mother liquor upstream or to the metal electrowinning process.

A treatment process for crystallizing a metal sulfate involving pre-treating a feedstock comprising calcium, magnesium, and / or lithium impurities, the pre-treating involving pre-leaching the feedstock in the presence of a lixiviant, selectively extracting a first portion of any of the impurities from the feedstock, and forming a leached solution comprising an uncrystallized metal sulfate and any remaining impurities; and / or refining the leached solution and removing a second portion of any of the remaining impurities; and crystallizing the uncrystallized metal sulfate from the leached solution to form a crystallized metal sulfate. So processed, the crystallized metal sulfate may be battery-grade or electroplating-grade.

This electrode comprises a compound that includes Li, one or more elements selected from Group 3–15 elements, and S. The peak intensity Ra of SO3 - and the peak intensity Rb of SO4 -, which are obtained through negative ion analysis by a time-of-flight secondary ion mass spectrometry, satisfy the relationship Ra > Rb.

This application discloses a nanoparticle, a thin film, an optoelectronic device, and an electronic device. The nanoparticle includes a core and a shell coating the surface of the core. The core is made of a metal oxide, and the shell is made of a first compound with the general formula A. x (SO4) y (OH) 3x‑2y A is the first metallic element, 1≤x≤4, 1≤y≤5, where x and y are integers, decimals, or fractions, respectively. The nanoparticles have good solution processing properties and performance stability, and can be used as materials for preparing optoelectronic devices.

The present disclosure relates to integrated systems and processes to produce lithium products, including battery grade lithium carbonate and lithium hydroxide.