The present invention relates to separation and recovery of metals from ground alkaline batteries using anode mud (zinc electrolysis waste) and other manganese and zinc containing materials. The material commonly referred to as alkaline black (AKB) is solubilized into sulfate media and the manganese to zinc ratio is adjusted. The solution containing metals is processed using crystallization and ion exchange methods to produce manganese sulfate and zinc sulfate solutions for several possible applications.

The present application relates to a technical field of separating kavalactone and flavokawain, and in particular, to a method for separating flavokawain and kavalactone, kavalactone, and microencapsulated kavalactone. The separation method includes: S1. grinding root of piper methysticum, extracting by supercritical carbon dioxide and collecting a residue for later use, in which an extraction temperature is 45-50 C. and an extraction pressure is 4-8 MPa; S2. extracting the residue by supercritical carbon dioxide, and collecting extracted oil for later use, in which an extraction temperature is 60-80 C. and an extraction pressure is 20-50 MPa; S3. performing re-extraction and adsorption on the extracted oil to obtain a primary product of the kavalactone; and S4. crystallizing the primary product of kavalactone to obtain the kavalactone. The obtained kavalactone is used for microencapsulated kavalactone.

A crystalline pigment or colorant composition having high color intensity and/or low sugar content, and methods and processes of preparation. The composition may comprise purified fruit and/or vegetable color juices.

The invention relates to a process for the preparation of alkali metal cyanides as a solid substance, comprising the steps of: i) an absorption step in the form of an absorption of hydrogen cyanide from a hydrogen cyanide-containing synthesis gas in an aqueous alkali metal hydroxide solution; ii) a crystallization step in the form of introducing said alkali metal cyanide solution into an evaporative crystallizer; iii) a separation step; iv) a recycle step; v) a drying step.

A method for producing complexed particles, wherein the method comprises: obtaining a good solvent solution, by dissolving Li.sub.2S, and LiX (X is at least one selected from a group consisting of F, Cl, Br, and I) in a good solvent, and precipitating particles by contacting the good solvent solution with a poor solvent having a temperature at least 165 C. higher than the boiling point of the good solvent, to evaporate off the good solvent; and, wherein the method satisfies at least one of the following: (i) the good solvent solution being obtained by further dissolving H.sub.2S in the good solvent, and (ii) H.sub.2S being dissolved in the poor solvent.

Aspects of the disclosure include crystalline solids of 3-palmitoyl-amido-1,2-propanediol and 3-palmitoyl-amido-2-hydroxy-1-dimethoxytriphenylmethylether-propane. Methods for preparing the crystalline solids of 3-palmitoyl-amido-1,2-propanediol and single crystals of 3-palmitoyl-amido-2-hydroxy-1-dimethoxytriphenylmethylether-propane are also provided. Methods for preparing a 3-palmitoyl-amido-2-hydroxy-1-dimethoxytriphenylmethylether-propane from a crystalline solid of 3-palmitoyl-amido-1,2-propanediol are also described.

Embodiments provide methods and structures for purification or volume reduction of a brine by an advanced vacuum distillation process (AVMD) to achieve higher flux by passage of vapors through an AVMD distillation unit. In one example, brine is circulated in a tank. The tank may include one or more membrane pouches that are submerged in the circulating brine or placed above the water level of the hot circulating brine. In other embodiments the membrane pouches are outside of the tank that includes the hot circulating brine but still in communication with it. The circulating brine is heated, allowing creation of water vapor. Using a vacuum, the water vapor is drawn through the membrane, where it may be condensed and subjected to further beneficial use. This process can concentrate to levels to generate crystals or solids, which can be separated and utilized.

The present disclosure provides a novel process for production of magnesium oxide with more excellent manageability. The present disclosure is a process for producing magnesium oxide. The process of the present disclosure comprises the following carbonation step, separating step, crystallization step and calcination step.

The carbonation step is a step in which carbon dioxide gas is blown into a magnesium compound suspension to obtain a magnesium hydrogencarbonate aqueous solution.

The separating step is a step in which the magnesium hydrogencarbonate aqueous solution is treated for solid-liquid separation.

The crystallization step is a step in which magnesium carbonate is crystallized from the aqueous solution obtained in the separating step.

The calcination step is a step in which the magnesium carbonate is calcinated in order to obtain magnesium oxide.

In the present disclosure, the crystallization step is carried out under crystallization conditions with a crystallization temperature of 50 C. or higher and lower than 80 C. The crystallization step is also carried out under crystallization conditions such that the product of the crystallization temperature and the crystallization time is 60 C..Math.h or greater and less than 210 C..Math.h.

The present invention discloses a method for quickly extracting lithium carbonate from saline lake water and a system for the same. The method comprises: first quick-freezing the saline lake water to obtain lithium-rich brine, then evaporating under reduced pressure to enable lithium carbonate to be rapidly precipitated out. The method has advantages of short process flow and less labor consumption, thereby enabling continuous automatic operation, high energy utilization and environment-friendly. Further, the crystallization rate is several times faster than that of the salt-pan process and the grade of lithium carbonate salt mine obtained can reach 95% or more, therefore the method of the present invention is particularly suitable for industrial production in the remote saline lake region. The system comprises a reduced-pressure evaporation crystallizer, a vacuum-pumping apparatus, a brine preheating apparatus and a brine cooling apparatus, which concentrates the brine by quick-evaporation of the water, promotes lithium carbonate to form non-uniform nucleus, and improves the crystallization efficiency.

An oil recovery process is provided where an oil-water mixture is recovered from an oil-bearing formation. Oil is separated from the oil-water mixture to yield produced water. The produced water is typically subjected to a pre-treatment process. After pre-treatment, the produced water is directed to an evaporator that evaporates at least some of the produced water and produces steam and an evaporator blowdown. The evaporator blowdown is directed to a dual stage crystallizer that concentrates the evaporator blowdown.