60results about How to "Fast phase separation" patented technology

The present invention is wet process of extracting vanadium and/or molybdenum form waste petrochemical catalyst alumina carrier containing V, Mo and other elements. The wet process includes high-temperature deoiling the catalyst in natural granularity, mixing with sodium carbonate, high-temperature oxidation and roasting in a kiln or furnace to obtain water soluble sodium vanadate and sodium molybdate; countercurrent water soaking of the chamotte to obtain solution containing V and Mo in certain concentration, adding calcium salt and magnesium salt to eliminate P and other impurities, addingammonium salt solution into the clear solution to obtain ammonium metavanadate, decomposing and melting ammonium metavanadate to obtain V2O5 product; adding acid to the supernatant and organic phase extraction of Mo, ammonia water reverse extraction to obtain ammonium molybdate, and adding acid to precipitate ammonium tetramolybdate or molybdate product.

The invention relates to a phosphine oxide-modified pillar (5) arene derivative and an application thereof, belonging to the technical field of selective separation and extraction agents for thorium (IV) and uranium (VI) from rare earth elements. The phosphine oxide-modified pillar (5) arene derivative is diphenyl phosphine oxide-substituted pillar (5) arene, is used as an extraction agent for selectively separating thorium and uranium from rare earth elements, and can realize the selective separation of uranium to thorium in actinide elements to a certain extent. The extraction agent, namely the phosphine oxide-modified pillar (5) arene in the invention has the advantages of single composition, good chemical stability, simple synthesis and easiness in obtainment, and is suitable for industrial production; furthermore, the using quantity of the extraction agent is low, and the thorium and the uranium can be selectively separated from the rare earth elements under high acidity; and in addition, the extraction agent further has the advantages of high extraction speed, high phase splitting speed and the like. The product disclosed by the invention has great economic benefits and practical application prospects.

The invention discloses a method for preparing a high-flux polyvinylidene fluoride hollow fiber membrane. The method comprises the following steps of: mixing polyvinylidene fluoride, a gaseous pore-forming agent, a hydrophilic modifier, additives and organic solvents and making a membrane-making solution; allowing an internal gelling medium and the membrane-making solution to pass through spinning nozzles on dry/wet spinning equipment at the same time, injecting into an external gelling medium, and performing phase-splitting treatment to make a primary membrane; and performing special chemical treatment on the primary membrane with a chemical treatment liquid to obtain a high-flux polyvinylidene fluoride hollow fiber membrane. The invention is characterized in that the membrane is reinforced with the pores by chemical reactions between the internal gelling medium, external gelling medium and chemical treatment liquid and the gaseous pore-forming agent; and the polyvinylidene fluoride hollow fiber membrane has a high flux, a high strength, a high entrapment rate and good hydrophilicity.

The invention provides a method for separating and purifying phycocyanin by means of combination of two aqueous phase extraction and ultrasonic waves. The method comprises the particular operating steps that spirulina is subjected to wall breaking through a repeated freezing and thawing method, supernatant is collected, and a crude phycocyanin extracting solution is obtained; glucan and inorganic salt two aqueous phase extraction is adopted, the crude phycocyanin extracting solution is put in ultrasonic waves for ultrasonic treatment for 15 min to 30 min, standing is conducted for 10 min to 15 min, the upper phase is taken and subjected to dialysis in a dialysis membrane with the molecular mass cut-off of 5,000 for 12 h to 20 h, freeze drying is conducted, and phycocyanin powder is obtained. The method for purifying the phycocyanin by means of combination of two aqueous phase extraction and the ultrasonic waves has the advantages of being high in selectivity and high in system phase-separation speed, operation is easy and convenient, equipment is conventional, and the method is suitable for industrial production. The phycocyanin purity of the phycocyanin powder prepared through the method reaches up to (A620/A280) 3.78, and the total yield reaches up to 90.6%.

The invention relates to a method for extracting flavonoid and chlorogenic acid from chrysanthemum by ionic liquid aqueous two-phase. The method for extracting the flavonoid and the chlorogenic acid from the chrysanthemum by the ionic liquid aqueous two-phase comprises the following steps that (1) an ionic liquid solution is added to chrysanthemum powder, after the mixture is mixed uniformly, inorganic salt is added to a system, the mixture is fully mixed to form a uniform suspension; (2) the suspension is ultrasonically extracted, and then the mixture is placed silently to form a two-phase system, the upper layer is an ionic liquid phase rich in the flavonoid and the chlorogenic acid, and the lower layer is an aqueous phase with the dissolved inorganic salt, after the liquid separation, an upper layer solution is obtained, that is, a concentrated solution rich in the flavonoid and the chlorogenic acid; and (3) ionic liquid in the concentrated solution rich in the flavonoid and the chlorogenic acid is separated, and extract rich in the flavonoid and the chlorogenic acid is obtained. The method for extracting the flavonoid and the chlorogenic acid from the chrysanthemum by the ionicliquid aqueous two-phase has the characteristics of simple operation, high phase separation speed, high extraction efficiency, low cost and environmental friendliness.

An extraction method of green prickleyash alkaloids, disclosed in the invention, comprises the following steps: carrying out microwave extraction on green prickleyash powder and an aqueous two-phase extraction solvent; filtering the obtained extract solution, standing, and splitting phases; carrying out ultrafiltration and nanofiltration operations on the upper phase; and concentrating and spray-drying to obtain an alkaloid extract, wherein the aqueous two-phase extraction solvent is selected from an alkyl alcohol ether glucoside/dipotassium hydrogen phosphate aqueous two-phase system with thepH value of 5.5-6.5. According to the method, total alkaloids with a high proportion can be obtained, and the phase splitting speed is high, so that the purity and the performances of the alkaloid extract are improved.

The invention discloses absorption liquid for trapping H2S through phase change for the problem that the existing H2S absorption liquid is high in energy consumption in desorption and low in sulfur resource utilization rate and the like. The absorption liquid is prepared from organic amine and organic solvent, and is used for absorbing H2S gas to achieve the liquid-liquid or liquid-solid split-phase effect. The H2S rich phase is sent into a regeneration tower to heat and desorb, the H2S lean phase can cyclically absorb H2S after being recycled without any processing treatment, the treatment quantity of the solution in the desorption is reduced, and the desorption energy consumption is lowered, wherein the distribution ratio of the H2S in the rich phase can achieve 93% or more, and the absorption liquid is appropriate to be used as a chemical absorbent for trapping H2S in the natural gas, the coal gas and refinery gas and the like, and belongs to the technical fields of the energy conservation and emission reduction and gas purification.

The invention provides an extracting agent and a method for treating reactive dyeing wastewater. The extracting agent is composed of the following components in percentage by mass: 20-50% of complexing agent, 8-30% of cosolvent and the balance of diluent, wherein the complexing agent is trialkylamine; the cosolvent is C8-C25 normal alcohol or isomeric alcohol; and the diluent is a substance which is a solid at room temperature and is a liquid at the temperature higher than the room temperature. The method comprises the steps of mixing an extracting agent and reactive dyeing wastewater according to the mass ratio of 1: (20-30); heating until melting the extracting agent, and extracting for 10-20 minutes under stirring; cooling to condense the extracting agent; and filtering after standing for a proper period of time to obtain the treated wastewater and the treated extracting agent. According to the method provided by the invention, the reactive dyeing wastewater is treated by using the solid extracting agent, so that hydrolyzed dyes and polar organic compounds in the dyeing wastewater can be effectively removed; and the primarily-treated wastewater has extremely-low chroma and COD (Chemical Oxygen Demand) so as to be directly used for a dyeing process in the next cycle.

The invention provides a solvent separating unit used for evaporation and recovery of a solvent system. A feed pipe arranged at the top of a barrel included by the solvent separating unit is communicated with a vertical condensate conduit through a transition pipe; the lower part of the vertical condensate conduit is provided with a horizontal condensate guide plate which is arranged to be slightly higher than a two-phase line; the central part of the vertical condensate conduit penetrates a metal phase-splitting mesh; an organic phase overflow groove with an upper opening is arranged above the metal phase-splitting mesh; and the top of the organic phase overflow groove is aligned with a liquid level line. In usage, a condensate successively flows through the transition pipe, the vertical condensate conduit and the horizontal condensate guide plate and then into the barrel for phase splitting; a water phase flows into a water phase discharging pipe, and an organic phase successively flows through the metal phase-splitting mesh and the organic phase overflow groove and then into an organic phase discharging pipe; and an inverted Y-shaped pipe can be arranged out of the barrel so as to adjust the two-phase line and prevent siphonage. According to the invention, the solvent separating unit has the advantages of an improved phase splitting effect, an improved phase splitting speed, a simple structure, convenience in operation, a wide application scope and capacity of preventing siphonage.

The invention provides a method for efficiently separating and purifying puerarin. The method comprises the steps that puerarin powder is subjected to reflux extraction in a 50-70% alcohol-water solution for 12-24 h to obtain crude extract, modified glucan-inorganic salt two aqueous phase extraction layering is carried out, the upper phase is dialyzed in a dialysis membrane with the molecular mass cut-off of 10000 for 15-20 h to obtain a puerarin water solution, the puerarin water solution is frozen and dried at the temperature of -15--10 DEG C for 8-15 h to obtain puerarin powder, and the modified glucan is caproic acid partially-esterified glucan. The 50-70% alcohol-water solution is adopted as the extraction solution, so that high yield and high purity are obtained, and meanwhile solid and liquid phases can be rapidly separated; the modified glucan/inorganic salt two aqueous phase system is high in selectivity for puerarin, the system phase separation speed is high, and rapid phase separation can be achieved without equipment such as a centrifugal machine; according to the puerarin powder prepared through the method, the puerarin purity reaches up to 97.5%, and the total recovery reaches up to 87.5%.

The invention relates to application of a cyclophane amide compound containing three central hydrogen bonds as an extracting agent in separation of rare-earth elements, wherein, the cyclophane amide compound containing the three central hydrogen bonds is applied to the separation of the rare-earth elements. The cyclophane amide extracting agent containing the three central hydrogen bonds has single composition, good chemical stability and less consumption; the extracting agent can carry out extraction in neutral solution; the dissolubility of the extracting agent in different solvents can be adjusted through an R group; and the extracting agent further has the advantages of fast extraction speed, fast phase separation speed and the like while extracting the rare-earth elements. Therefore, the cyclophane amide containing the three central hydrogen bonds is taken as a novel extracting agent for extracting and separating the rare-earth elements has practical application prospect.