46results about How to "Low dehydration temperature" patented technology

The invention discloses flaky iron phosphate, and a preparation method and application thereof. The microscopic morphology of the flaky iron phosphate is a primary particle in a sheet shape with a thickness of 10 to 50 nm, a length of 100 nm to 3 [mu]m and a width of 100 nm to 3 [mu]m. The preparation method comprises the following steps of: weighing a ferrous ion solution and adding phosphoric acid and a crystal modifier; weighing a phosphorus salt solution and adding an oxidizing agent; carrying out mixing to obtain a mixed solution C, controlling the pH value of the mixed solution C to be 1.5-2.2, and carrying out a reaction to obtain pale yellow iron phosphate slurry; converting the iron phosphate slurry into white or pink-white iron phosphate slurry containing crystal forms under theconditions of stirring and heating, reducing a stirring speed by 20%-50% after the completion of the conversion, and carrying out ageing and heat preservation; performing solid-liquid separation, andcollecting a solid portion to obtain a crystalline iron phosphate precipitate; and washing the precipitate and then performing calcination to obtain the flaky iron phosphate. The iron phosphate of theinvention can be used for preparing lithium iron phosphate with high compaction density.

The invention discloses a foam flooding produced liquid demulsifier which is a non-ionic polyether demulsifier and is characterized in that the demulsifier is prepared by three steps: phenolic resin serving as an initiator firstly reacts with epoxypropane in the presence of an alkaline compound serving as a catalyst to obtain a propoxylated polyether compound; the propoxylated polyether compound performs addition reaction with ethylene oxide under the effect of an alkaline catalyst to form an intermediate; and the intermediate reacts with epoxypropane, wherein in the reaction formula of each step, the alkaline compound is sodium hydroxide, potassium hydroxide or sodium ethoxide; in the three steps of reaction for preparing the demulsifier, the mass ratio of the phenolic resin to alkaline compound to epoxypropane in the first step of reaction is (20-30):(0.05-0.15):(50-90); the mass ratio of the propoxylated polyether compound to alkaline compound to ethylene oxide in the second step of reaction is (20-35):(0.1-0.45):(70-160); and the mass ratio of the intermediate to alkaline compound to epoxypropane in the third step of reaction is (20-30):(0.05-0.15):(50-90).

The invention relates to a graphene oxide aerogel thermochemical heat storage composite material and a preparation method thereof. The method comprises the following steps: 1) ultrasonically strippinga graphite oxide aqueous solution to obtain a graphene oxide aqueous solution; 2) uniformly mixing the graphene oxide aqueous solution with MgCl2.6H2O, and carrying out hydrothermal crosslinking self-assembly to obtain MgCl2.6H2O-graphene oxide hydrogel compound; and 3) carrying out vacuum drying treatment on the MgCl2.6H2O-graphene oxide hydrogel compound to obtain the graphene oxide aerogel thermochemical heat storage composite material. Compared with the prior art, graphene oxide aerogel is used as a carrier; a large specific surface area is provided for MgCl2.6H2O crystallization, so thatthe problem that hydrated inorganic salt is easy to agglomerate can be effectively solved, and the MgCl2.6H2O-graphene oxide hydrogel compound has the advantages of high energy storage density, adjustable reaction temperature, good dispersity and the like. The composite material has a huge application space in the field of medium and low temperature thermochemical heat storage.

The invention discloses a method for preparing anhydrous boron oxide. The method comprises the following steps: (1) carrying out vacuum dehydration treatment of boric acid to obtain boron oxide; (2) placing boron oxide in a crucible, heating to 400-500 DEG C, and then keeping for 30 min; (3) carrying out microwave heating dehydration treatment of boron oxide with the dehydration time of 10-40 min; and (4) under a normal temperature and normal pressure condition with the water content of less than 1 ppm, cooling to the room temperature to obtain anhydrous boron oxide. The method has the advantages of simple production process and low production cost, and the obtained product has the water content of below 150 ppm and the purity of up to 99.999%.

This invention relates to fluorin contain silicon interlinkage polyether emulsion breaker and its preparation method. The breaker made up by hydroxy compounds contains fluorosilicic (A)and one kind of alcohol, acid, hydroxybenzene, amine that contains active hydrogen or active hydroxy group or resin contains hydroxybenzene and oxygen ethylene agent and oxygen propylene agent, they conglomerate block polyether (B). There conglomeration is act under function of interlinkage agent (E) toluene disocynate or multi alkylene polyisocyanate or diphenyl methane-4,4- diisocyanate. The agent material components and their weight percentage content as following fluorosilicic 1-15%, (B) 70-98%, (E) interlinkage agent 1-15%. Comparing to existing technique, the dosage is few, desiccation temperature is low, desiccation velocity is fast, oil contain ratio of emerged water is low, it is a high efficiency and quick crude oil demulsifying agent.

This invention relates to fluorin interlinkage polyether demulsifying agent and its preparation method. The demulsifying agent made up by alcohol or acid with fluorin or alcohol, acid, hydroxybenzene, amine that contains active hydrogen or active hydroxy group or resin contains hydroxybenzene and oxygen ethylene agent and oxygen propylene agent, they conglomerate block polyether (B). There conglomeration is act under function of interlinkage agent (E) toluene disocynate or multi alkylene polyisocyanate or diphenyl methane-4,4- diisocyanate. The agent material components and their weight percentage content as following (A) 1-45%, (B) 40-97%, (E) interlinkage agent 2-15%. Comparing to existing technique, the dosage is few, desiccation temperature is low, desiccation velocity is fast, oil contain ratio of emerged water is low, it is a high efficiency and quick crude oil demulsifying agent.

The invention provides an antibiotic zymocyte dreg curing dehydrating method. The method comprises the steps that antibiotic zymocyte dregs and a curing dehydrating agent are mixed for a curing reaction, and moisture in the antibiotic zymocyte dregs is removed; and the curing dehydrating agent is any or a combination of at least two inorganic substances and/or organic substances which can form hydrates, absorb moisture or react with water. Zymocyte dreg solid mixtures generated through the curing reaction can be subjected to resource utilization or incineration disposal directly or after dehydration. Through the method, the rapid dehydrating temperature and complete dehydrating temperature of the zymocyte dregs can be lowered by 10-90%, the problems that antibiotic zymocyte dregs are difficult to store and transport at the room temperature, prone to secondary fermentation and pollution and high in cost in treatment processes such as dehydration are solved, and a new method is provided for low-cost resource utilization and harmless treatment of the antibiotic wet zymocyte dregs.

The invention discloses a preparation method of anhydrous lanthanum chloride. The preparation method comprises the following steps: S1, carrying out first-section fluidization dehydration on lanthanum chloride heptahydrate at 60 DEG C to 100 DEG C to obtain a lanthanum chloride trihydrate crude product; S2, carrying out second-section fluidization dehydration on the lanthanum chloride trihydrate crude product at 120 DEG C to 130 DEG C to obtain a lanthanum chloride monohydrate crude product; S3, carrying out third-section fluidization dehydration on the lanthanum chloride monohydrate crude product at 140 DEG C to 160 DEG C to obtain the anhydrous lanthanum chloride, wherein the three sections of fluidization dehydration are carried out in a hydrogen chloride gas atmosphere. According to the preparation method of the anhydrous lanthanum chloride, disclosed by the invention, the lanthanum chloride heptahydrate is subjected to sectioned fluidization dehydration and a hydrogen chloride protection gas atmosphere is provided, so that a hydrolysis effect in a process of dehydrating an intermediate product lanthanum chloride monohydrate into the anhydrous lanthanum chloride is effectively inhibited and the purity of a product is greatly improved; the preparation method of the anhydrous lanthanum chloride has the advantages of low dehydration temperature, low preparation cost and good dehydration effect.

The invention discloses a method for preparing anhydrous boron oxide. The steps are as follows: (1) boric acid is subjected to vacuum dehydration treatment to obtain boron oxide; (2) boron oxide is placed in a crucible and heated to 400-500°C Keep it for 30 minutes; (3) Dehydrate the boron oxide by microwave heating, the dehydration time is 10-40 minutes; (4) Cool to room temperature under normal temperature and pressure conditions with a water content of less than 1ppm to obtain anhydrous boron oxide. The production process of the invention is simple, the production cost is low, the water content of the obtained product is below 150ppm, and the purity is as high as 99.999%.

The invention discloses a crude oil continuous distillation and dehydration method. The dehydration method includes that water-containing crude oil is continuously introduced into a feeding and conveying pipeline of a feeding and conveying assembly of an crude oil continuous distillation and dehydration device, then enters a pre-heating pipeline in a pre-heating assembly, is pre-heated, next enters a shell body of a shell body assembly and is distilled; water and light oil in the crude oil are discharged from a gas phase outlet at the upper part of the shell body, are condensed by a distillation gas recovery assembly and then enter a light oil and water storage tank, wherein the water is discharged from the bottom of the light oil and water storage tank, and gas hydrocarbons are discharged from the upper part of the light oil and water storage tank and then enter a gas hydrocarbon recovery tank; heavy oil in the crude oil is discharged from a liquid phase outlet at the lower part of the shell body, is condensed by a heavy oil recovery assembly and then enters a heavy oil recovery tank. A to-be-dehydrated material (such as the crude oil) is subjected to pre-heating treatment on the pre-heating pipeline, and then the to-be-dehydrated material after heating treatment is distilled in the shell body assembly and is subjected to gas-liquid separation at the same time to achieve dehydration.

The invention discloses a dry lily and a color protection and shaping technology of the dry lily. According to the technology, the dry lily product is prepared by taking a fresh lily as a raw material, and performing steam blanching, cooling, color protection and shaping treatment, and two-stage temperature hot air dewatering and drying. The dry lily produced by the technology is good in color, aroma and taste and has a higher nutritive value; potential safety hazards caused by sulphitation color protection in the traditional technology are broken through; the safety is high; a commodity valueand an economic additional value of the dry lily are increased; the environmental pollution is reduced; and the technology has great significance for industrial implementation of choicest products ofthe dry lily.

The invention relates to the technical field of oil-gas-water separation of petroleum and natural gas, in particular to a low-interfacial-tension efficient oil-gas-water separation method and device.According to the method, a gas-liquid mixture produced by an oil well enters a washing chamber and is pre-separated by a liquid distribution device, gas is discharged from a gas collection bag at thetop of an oil chamber, water-containing crude oil enters a coalescence chamber and flows through a hydrophilic filler, low interfacial tension is formed under the synergistic effect of a demulsifier,then the water-containing crude oil undergoes round hole rectification and parallel rectification and then enters a separation chamber for oil-water separation, separated upper-layer crude oil entersan oil chamber, produced water is discharged, an emulsion is collected and then discharged, and purified crude oil is discharged through an oil outlet. The device comprises the washing chamber, the coalescence chamber, the separation chamber and the oil chamber. According to the invention, low interfacial tension is formed through the synergistic effect of demulsification, physical coalescence, rectification and the like, so a dehydration temperature can be effectively reduced, dehydration time is shortened, separation efficiency is improved, and meanwhile the beneficial effects that an equipment size is reduced, engineering investment is reduced, operation energy consumption is reduced and oilfield development benefits are improved are achieved.