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1307 results about "Lithium chloride" patented technology

Lithium chloride is a chemical compound with the formula LiCl. The salt is a typical ionic compound, although the small size of the Li⁺ ion gives rise to properties not seen for other alkali metal chlorides, such as extraordinary solubility in polar solvents (83.05 g/100 mL of water at 20 °C) and its hygroscopic properties.

Dehumidizer for air dehumidification, air dehumidification method and device

The invention discloses a dehumidizer for air dehumidification. The dehumidizer provided by the invention is an ionic liquid solution formed by dissolving an ionic liquid in water, wherein the ionic liquid is formed by organic positive ions and inorganic negative ions, and the melting point of the ionic liquid is close to or is lower than room temperature. In addition, the invention further discloses a method and a device for air dehumidification by the adoption of the above dehumidizer. In comparison with traditional salting liquids (lithium bromide, lithium chloride and calcium chloride aqueous solutions and the like), the dehumidizer provided by the invention has the following advantages: 1) the applied ionic liquid solution is in the liquid state at normal temperature, is intermiscible with water, and will not be crystallized during operation, so as to guarantee the reliable operation of a system; 2) the applied ionic liquid solution has similar or lower water vapor pressure than a traditional dehumidifying salting liquid so as to raise the dehumidifying efficiency; 3) the applied ionic liquid solution will not corrode metal equipment such as steel equipment such that the equipment has low cost and long service life; 4) the dehumidizer has nonvolatility so as to reduce the environmental pollution.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI

Coordinate extracting system for extracting lithium from salt lake brine with extraction method

The invention relates to a coordinate extracting system for extracting lithium from salt lake brine with extraction method, which comprises the following steps of (1) acidity of raw material liquid adjustment: adding hydrochloric acid to the salt lake brine to adjust the pH value of the raw material liquid to 1 to 5 so that the raw material liquid is obtained; (2) extracting lithium: carrying out three-stage extraction on the raw material liquid obtained in step (1) by using TBP-BA-FeCl3 solvent naphtha as an extracting agent to obtain an organic phase; (3) organic phase washing: carrying out three-stage washing to the organic phase obtained in the step (2) by using the hydrochloric acid as a washing agent; (4) organic phase reextraction: carrying out three-stage extraction on the organic phase obtained in the step (3) by using hydrochloric acid as a reextraction agent to obtain lithium chloride solution. The invention has the advantages of simple technique, easy control, low reextraction acidity, low requirements on reextraction equipment materials and concentration of lithium in the material brine, and no need of evaporation concentration of thin lithium solution, thereby saving energy, reducing consumption, decreasing the production cost, and simultaneously improving the total recovery rate of the lithium effectively.
Owner:QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI +1

A kind of separation and recovery method of NMP and catalyst lithium chloride in polyphenylene sulfide production

The invention relates to a separation and recovery method for n-methylpyrrolidone (NMP) and a lithium chloride catalyst during polyphenylene sulfide producing. The method is characterized by: directly carrying out vacuum distillation for a polyphenylene sulfide polycondensation mother liquid until the polyphenylene sulfide polycondensation mother liquid is dried to recover a solvent of the NMP, wherein the NMP can be used in the next recycling production; adding water to the distilled residues, then heating to a temperature of 40 DEG C, carrying out stirring and completely dissolving the distilled residues, carrying out filtering and washing the filter residues, mixing the resulting filtrate and the washing solution, and analyzing lithium content in the mixed solution; adding the mixed solution to a phosphoric acid solution or a sodium aluminate solution, wherein the phosphoric acid solution or the sodium aluminate solution has a lithium reaction equivalent of 105-115%, then completely stirring to enable lithium phosphate or lithium aluminate to be precipitated completely, then carrying out steps of filtering, washing, drying for the lithium phosphate or the lithium aluminate to recover the lithium salt having a purity more than 97%. According to the present invention, the operation of the method is simple; the cost is low; the recovered NMP and the recovered lithium salt havehigh purities.
Owner:NANJING UNIV

Novel method for spodumene calcining transformation

The invention relates to a method for producing lithium carbonate, lithium hydroxide and lithium chloride with spodumene. Aiming at the defect of the calcination transformation technology of the spodumene concentrate, the invention provides a new method of the fluidization and dynamic calcination transformation of the spodumene concentrate: the spodumene concentrate from a concentration plant is dried and milled to granules with the granularity of minus 250 meshes to minus 350 meshes; then a fluidization dynamic calcinator is adopted to carry out high temperature calcination transformation to the concentrate, the material temperature is controlled between 900 and 1200 DEG C; because the material in the furnace is fluidized and transfers heat and is delivered in the form of air delivery with hot air, the process is rapid in heat transfer rate, high in efficiency and short in calcination time, which overcomes the technical defect of the existing calcination technology that the material is easy to be agglomerated and avoids cooling and ball-milling procedures. When the calcined material is treated by the procedures of leaching, purging, filtering, etc., the obtained filtrate (raw material liquid) can be utilized for producing products such as lithium carbonate, lithium hydroxide, lithium chloride and so on by adopting existing different technologies.
Owner:钟辉

High-performance superfine cement based grouting material for microfissuring and silty fine sand soil grouting treatment and application of grouting material

The invention discloses a high-performance superfine cement based grouting material for microfissuring and silty fine sand soil grouting treatment, and application of the grouting material. The grouting material comprises the following ingredients in parts by weight: 50-79 parts of Portland cement clinker, 19-48 parts of an auxiliary cementing material and 2-7 parts of desulfurized gypsum, whereinthe auxiliary cementing material comprises the following ingredients in parts by weight: 25-57 parts of mineral slag, 8-21 parts of steel slag, 18-36 parts of pulverized fuel ash, 6-12 parts of limestone flour, 1-8 parts of silica fume and 2.5-12.8 parts of a high-performance composite regulator; the high-performance composite regulator comprises the following ingredients in parts by weight: 5-16parts of sodium hydroxide, 4-12 parts of sodium silicate, 4-14 parts of potassium metaaluminate, 12-21 parts of calcium chloride, 11-18 parts of lithium chloride, 4-12 parts of triethanolamine, 21-27parts of alum, 18-29 parts of aluminum sulfate, 0.2-1.5 parts of hydroxypropyl methyl cellulose, 0.1-3.0 parts of viscous polymer, 0-0.8 parts of polypropylene fiber and 0.5-3.0 parts of a superplasticizer; and the viscous polymer is an acrylic ester polymer or an ethylene-vinyl acetate copolymer.
Owner:SHANDONG UNIV
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