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66 results about "Calcium crystals" patented technology
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Grammite raphioid fibre crystal-nano calcium carbonate micro-nano composite powder material and production method
InactiveCN101498052AHigh surface energyHigh chemical activityPolycrystalline material growthAfter-treatment detailsMicro nanoFiber crystal
The invention relates to a surface modified product of an acicular wollastonite crystal and a production method thereof. The product is micro-nano composite powder by coating a nanometer calcium carbonate crystal on the surface of the acicular wollastonite fiber crystal. The method comprises the following steps: firstly, preparing an active lime milk solution and an acicular wollastonite fiber solution; compounding the two solutions into a suspension; adding a crystalline directing agent to the suspension and filling CO2 gas for a coating reaction so that the nanometer calcium carbonate crystal gradually grows on the surface of an acicular aedelforsite fiber, and the micro-nano composite powder by coating a nanometer calcium carbonate crystal on wollastonite is obtained; and coating a layer of coupling agent on the surface of the micro-nano composite powder to obtain the acicular wollastonite fiber crystal-nanometer calcium carbonate crystal-coupling agent composite powder material. The product keeps the superior characteristics of the acicular wollastonite crystal and the nanometer calcium carbonate crystal, improves the surface energy and the chemical activity of wollastonite composite particles and can be well stuck with organic polymers so as to form a favorable interface and improve the bonding force between fillings and basal bodies, such as plastics, pulp, and the like.
Owner:颜鑫 +3
Preparation method of morphology controllable calcium carbonate based on temperature control
ActiveCN104692437ASimple processWide range of raw materialsCalcium/strontium/barium carbonatesCalcium crystalsTemperature control
The invention relates to a preparation method of morphology controllable calcium carbonate based on temperature control. The preparation method of the morphology controllable calcium carbonate based on the temperature control comprises the following steps: introducing a solution containing carbonate or gas such as CO2 which can generate carbonate or a gas mixture containing CO2 into a solution containing calcium ions at the temperature of 10-100 DEG C, initiating precipitation reaction, obtaining a precipitate mixture several minutes later, and drying at room temperature, so that micron-sized calcium carbonate crystals with specific morphology are obtained. The calcium carbonate obtained by adopting the preparation method is good in correspondence between morphology and reaction temperature, and the correspondence is independent of type of a reactant; the obtained calcium carbonate crystals are well dispersed and uniform in sized; meanwhile, control of crystal form is efficient and stable; besides, by adopting a temperature control process, one-step synthesis, simplicity and practicability are realized, and industrial cost is low, so that the preparation method of the morphology controllable calcium carbonate based on the temperature control can be widely applied to batch preparation of calcium carbonate in different morphologies.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI
Vaterite calcium carbonate microspheres and preparation method thereof
InactiveCN104692439ARich sourcesSolve the problem of wastewater useCalcium/strontium/barium carbonatesCalcium crystalsChemical reaction
The invention discloses a method for simply preparing vaterite calcium carbonate microspheres. The preparation method comprises the steps of 1, preparing a sericin solution; 2, preparing a sericin solution with a certain concentration as a template regulation system through the dialyzed sericin solution according to the chemical equation shown in the specification, and dropping calcium salt and carbonate which have the same concentration into a reaction system in a certain proportion; 3, agitating the reaction system for a period of time, centrifuging to remove precipitate, and washing with water at three times; 4, drying the CaCO3 precipitate through a drying box after water washing, so as to obtain the finished product of vaterite calcium carbonate microspheres. The granularity of the CaCO3 microspheres is 1 to 1.5 microns; the vaterite calcium crystal form in the obtained material is more than 80%; the natural sericin solution is used as the template regulation system to regulate CaCO3 crystal form.
Owner:ZHEJIANG SCI-TECH UNIV
Production of L-aspartase calcium
InactiveCN1817855AShort reaction timeConducive to industrial mass productionOrganic compound preparationAmino-carboxyl compound preparationCalcium hydroxideCalcium crystals
Production of L-aspartyl-calcium is carried out by taking L-asparagic acid and calcium hydroxide as raw materials, furnishing in proportion 3.4-3.8:1, putting it into mixer, adding into water while agitating to obtain soliquoid, heating the soliquoid, inducing into colloid mill and high-pressure fluid nanometer mill to obtain L-aspartyl-calcium liquid, inducing L-aspartyl-calcium into agitating container, adding into 45% alcohol, agitating, laying aside to obtain L-aspartyl-calcium crystal, adding into 55% alcohol, agitating, laying aside, centrifugal separation depositing, vacuum drying deposit and screening to obtain final product. It has short reactive time, higher purity and more yields.
Owner:JIANGSU XINGCHI BIOTECH
Drainage structure for controlled drainage of tunnel and tunnel drainage system with same
ActiveCN104196562AClever cleaningSimple structureHollow article cleaningDrainageCalcium crystalsOutfall
The invention provides a drainage structure for controlled drainage of a tunnel and a tunnel drainage system with the same. The drainage structure for controlled drainage of the tunnel comprises two drain pipes, wherein the two drain pipes are connected and the diameters of the two drain pipes are different. The diameter of the drain pipe A is smaller than the diameter of the drain pipe B. One end of the drain pipe A is sealed, and the sealed end of the drain pipe A stretches into the drain pipe B. The drainage structure further comprises a spring, the spring is fixedly connected with the bottom of the sealed end of the drain pipe A, a sluice valve block matched with the cross section of the drain pipe A in size is arranged at the movable end of the spring, a plurality of water outlets are formed between the bottom end of the drain pipe A and the sluice valve block, and the sluice valve block is connected into the drain pipe A in a sliding mode through a plug. The drainage structure and the tunnel drainage system with the drainage structure are simple, have the moderate drainage effect, can further ingeniously eliminate calcium crystals (or suspended sediment) adhering to the inner portions of the drain pipes, and are high in operability, wide in practicability and capable of effectively promoting the development of drainage systems of tunnels which are high in ecological system requirement or tunnels in limestone areas.
Owner:CHONGQING GUOXIANG NEW MATERIAL
Method for preparing organic calcium with eggshells
InactiveCN106307551AHigh extraction rateLess impuritiesFood ingredientsEnvironmental resistanceEggshell
Owner:邵玉华
Method of recovering phosphorus
ActiveCN103964611AImprove effective utilizationImprove recycling efficiencyMultistage water/sewage treatmentCalcium silicatePhosphate
The invention relates to the technical field of water treatment in environmental engineering and particularly relates to use of calcium silicate hydrate crystals for recovering phosphorus from phosphorus containing wastewater and a method of recovering phosphorus. The method comprises the following steps: carrying out full contact and reaction on calcium silicate hydrate and phosphate to quickly form HAP (Hydroxyapatite) on the surface of calcium silicate hydrate; and then mixing with CO3<2->, wherein CO3<2-> replaces OH- in HAP, and converting HAP on the surface of calcium silicate hydrate into CHAP with more developed pore structures. According to the method provided by the invention, CO3<2-> in water is not blown by aeration and the pH value is not adjusted by an added calciferous chemical reagent. The phosphorus recovery process can be stably carried out in a weakly alkaline environment and the calcium silicate hydrate crystals further can take part in the phosphorus recovery reaction circularly so as to improve the effective utilization ratio of the calcium silicate hydrate crystals and the phosphorus recovery efficiency.
Owner:CHONGQING UNIV OF ARTS & SCI
Method for preparing high-activity alpha type hemihydrate gypsum cementing materials by using reaction of chlorine-alkali waste liquid treating ardealite
InactiveCN103011641AEliminate intermediate processesSuitable for large-scale processingPhosphogypsumHigh activity
The invention relates to a method for preparing high-activity alpha type hemihydrate gypsum cementing materials by using a reaction of chlorine-alkali waste liquid treating ardealite. The method comprises the following technique steps: (1) adding precipitator in the chlorine-alkali waste liquid for removing one part of ion impurities; (2) implementing the sedimentation and filtering technique; (3) implementing the concentration technique of calcium chloride solution; and (4) preparing high-activity hemihydrate gypsum cementing material through the normal pressure hydrothermal reaction. The method has the benefits that the problem of two wastes are synchronously solved, so that the environmental friendliness and the resource conservation are achieved; the waste liquid can be used by being concentrated to have the concentration of 15-45% without being prepared to crystals, so that the intermediate technique of preparing calcium chloride crystals can be avoided, and the energy consumption is reduced; the waste liquid can be recycled through disposing after the reaction; and the method is suitable for treating the chlorine-alkali waste liquid and the phosphating industrial wastes-ardealite in scale, and is also suitable for resource recycling industrial production.
Owner:WUHAN UNIV OF TECH
Preparation method of self-foaming porous composite bone repair bracket
InactiveCN105148326AUniform porosityRegulation of degradabilityTissue regenerationProsthesisCalcium crystalsFoaming agent
The invention relates to a preparation method of a treatment material, in particular to a preparation method of a self-foaming porous composite bone repair bracket. The preparation method comprises the following steps: during the synthesis process of a phosphomycin calcium-polyurethane composite, foaming agent water is uniformly compounded in the material in a phosphomycin calcium crystal water form; crystal water is released under a certain condition to react with isocyanato in polyurethane system, so as to generate CO2 gas, achieve self-foaming formation of the composite system, and prepare a phosphomycin calcium-polyurethane composite bone repair bracket with porosity and uniform pores. The in situ self-foaming method is easy and feasible.
Owner:SICHUAN UNIV
Method for preparing feed grade calcium formate
InactiveCN107686446AAvoid lysate consumptionImprove responseOrganic compound preparationCarboxylic acid salt preparationCalcium formateImpurity
The present invention relates to a production method of calcium formate, specifically discloses a preparation method of feed grade calcium formate, comprising the following steps: a. Putting light calcium carbonate or nanometer calcium carbonate into water or mother liquor, adding mass concentration ≥ 88 % formic acid solution; b, solid-liquid separation of the reaction product; c, dry calcium formate solid. The advantages of the present invention are: 1) the temperature of the reactor can be raised rapidly, and the temperature can be effectively avoided from being too high, no external heat source and forced heat exchange are required to reduce the temperature, energy consumption is reduced, the production process is simplified, and the product quality is stable; 2) the product is naturally separated, The reaction time is shortened, and the impurity content of the product is reduced; 3) It is beneficial to the growth of calcium formate crystals, further improving the product purity, and the product has a large crystal structure, uniform particle size, and good appearance.
Owner:GUANGHAN LONGDA FEED
Titanium gypsum slurry dehydration method
The invention relates to a titanium gypsum slurry dehydration method, and belongs to the field of inorganic fine chemical engineering. The method comprises the following steps: firstly, measuring an isoelectric point of a titanium gypsum slurry, and adding lime to adjust the pH value of the titanium gypsum slurry to be that of a position near the isoelectric point, so that solids in the titanium gypsum slurry can be easily gathered to form large particles which are beneficial to filtration; secondly, adding an appropriate inorganic salt to change the surface adsorption state of a calcium sulfate crystal, so as to form crystal particles which are beneficial to filtration. Through adoption of the method, the slurry dehydration and filtration performance can be improved, the water content in a filter cake can be effectively reduced, and then efficient dehydration of the titanium gypsum slurry can be realized.
Owner:MAANSHAN HOYO MATERIAL TECH CO LTD
Fluoride-free covering slag used for high-aluminum steel continuous casting crystallization device
The invention relates to fluoride-free covering slag used for a high-aluminum steel continuous casting crystallization device. The covering slag is composed of, by mass, oxide components of 30-45% of CaO, 10-25% of SiO2, 20-35% of Al2O3, 2-10% of MgO, 4-10% of B2O3, 8-15% of Na2O+Li2O, CaO / (SiO2+Al2O3) larger than or equal to 1.1 but smaller than or equal to 1.3, CaO / B2O3 larger than or equal to 3.5 but smaller than or equal to 7 and SiO2 / B2O3 larger than or equal to 1 but smaller than or equal to 1.7. Scrap steel in the covering slag is low in reaction degree, crystallization performance is good, and the crystallization ore phase is mainly calcium borate silicate. The formed calcium borate silicate can fix SiO2 in covering slag melt, reaction between SiO2 and an Al element in steel is weakened from reaction kinetics, and the stability of the covering slag is greatly improved; the calcium borate silicate crystals can effectively control the heat-transfer effect of the covering slag.
Owner:CENT SOUTH UNIV
L-aspartic acid chelated calcium and preparation method thereof
InactiveCN107417556AHigh yieldHigh pressure and high yieldOrganic active ingredientsNervous disorderCalcium crystalsCalcium hydroxide
Owner:王广生
Method for production of high active calcium fishbone pulp by ultra-high pressure micro-jet technology and prepared fishbone pulp
InactiveCN109527441AFast absorptionImprove absorption and utilizationFood ingredientsUltra high pressure food processesCalcium crystalsUltra high pressure
Belonging to the field of food deep processing, the invention discloses a method for production of high active calcium fishbone pulp by ultra-high pressure micro-jet technology and prepared fishbone pulp. The method includes the steps of: raw material cleaning, raw material chopping, raw material rinsing, fishbone pulp production, adjustment of pH and moisture content of the fishbone pulp, ultra-high pressure micro-jet homogenization, strain adding, and fishbone pulp fermentation, thus obtaining the high active calcium fishbone pulp. Before fermentation, ultra-high pressure micro-jet homogenization pretreatment is carried out on the fishbone pulp, thus being conducive to loosening the internal tissue structure of fishbone pulp and softening calcium carbonate, calcium hydroxylapatite crystals and other water-insoluble substances, facilitating the transformation of inorganic calcium crystals by probiotics and related enzymes, and increasing the content ratio of calcium ions in fishbone pulp.
Owner:韶关市华工高新技术产业研究院 +1
Application of graphene oxide in improving soil consolidation strength, composition and application method of composition
InactiveCN110684541AHigh consolidation strengthIncrease reaction rateContaminated soil reclamationOrganic fertilisersCalcium crystalsMicroorganism
The invention provides an application of graphene oxide in improving soil consolidation strength, a composition and an application method of the composition, and relates to the technical field of microbially induced calcium carbonate soil improvement. According to the application of graphene oxide in improving the soil consolidation strength, the composition and the application method of the composition, the graphene oxide can enable microorganisms to induce the rapid growth of calcium carbonate crystals in calcium carbonate, and the yield of the calcium carbonate is increased; and the size ofthe calcium carbonate crystals can further be changed, the consolidation of soil is facilitated, and the compressive strength of the soil is improved.
Owner:CHINA UNIV OF GEOSCIENCES (BEIJING)
Drying method of fosfomycin calcium
ActiveCN106949710ADrying solid materials without heatPreliminary solid treatment for dryingCalcium crystalsDrying time
A drying method of fosfomycin calcium comprises the following steps: step 1, crushing a fosfomycin calcium monohydrate wet product; step 2, feeding the crushed fosfomycin calcium monohydrate wet product into a double-cone dryer, and then controlling a vacuum degree in the double-cone dryer to be 20-30Kpa; step 3, controlling the vacuum degree in the double-cone dryer to be 20-30Kpa and temperature to be 40-50DEG C, enabling the double-cone dryer to rotate at intervals, and carrying out drying for 16h; step 4, controlling the vacuum degree in the double-cone dryer to be smaller than or equal to 30Kpa, temperature to be 55-65DEG C and drying time to be 8-16h so as to enable fosfomycin calcium crystals to form lumps with 2-5cm diameters; and step 5, controlling the vacuum degree in the double-cone dryer to be smaller than or equal to 5Kpa, temperature to be 55-65DEG C and drying time to be longer than or equal to 8h so as to enable the water content of the dried fosfomycin calcium crystals to be 8.7-12.0%. In the invention, the double-cone dryer is used for drying, and spinning extrusion is carried out on the fosfomycin calcium crystals in the drying process so as to obtain fine lump solids.
Owner:千辉药业(安徽)有限责任公司
Metal organic framework-calcium carbonate composite crystal material and preparation method thereof
The invention discloses a metal organic framework-calcium carbonate composite crystal material and a preparation method thereof, and belongs to the technical field of nano composite materials. The metal organic framework-calcium carbonate composite crystal material can be obtained by performing polymer modification on the surfaces of metal organic framework crystal particles, then adding the metal organic framework crystal particles into a calcium chloride aqueous solution and synthesizing calcium carbonate crystals by using an ammonia diffusion method. In the composite crystal material, the metal organic framework particles can be uniformly embedded in the inorganic calcium carbonate crystal, so that the thermal stability and alkali stability of the composite crystal material are greatly improved, and the composite crystal material has important application value in the technical fields of catalysis, printing ink, coatings, proton conduction and biological medicines.
Owner:JINAN UNIVERSITY
Microbial ecological modification method for expansive soil
ActiveCN114737557ALow expansibilityReduce rejectionBuilding constructionsOrganic fertilisersCalcium crystalsMicroorganism
The invention relates to the field of environmental geotechnical engineering, in particular to a microbial ecological modification method for expansive soil. The method comprises the following steps: respectively obtaining to-be-modified expansive soil and a sporosarcina pasteurii bacterial solution; mixing urea and calcium salt to obtain a cementing liquid; mixing the sporosarcina pasteurii bacterial liquid and the cementing liquid according to a preset volume ratio, and then adding the mixture into to-be-modified expansive soil for mixing to obtain a sample; maintaining the sample to obtain the green and environment-friendly modified expansive soil. By adopting sporosarcina pasteurii, urea can be continuously hydrolyzed into NH4 < + > and CO3 < 2->, meanwhile, Ca < 2 + > in expansive soil and added CaCl2 is continuously attracted to the surfaces of thalli, and Ca < 2 + > and CO3 < 2-> are combined on the surfaces of the thalli to form calcium carbonate crystals, so that the soil body strength of the expansive soil is enhanced; meanwhile, residual NH4 < + > and Ca < 2 + > in the reaction system can reduce the expansibility of the expansive soil through the effects of neutralizing negative charges and replacing cations respectively.
Owner:CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
Phosphogypsum waste residue treatment method
PendingCN112110470AImprove solubilityEasy to controlMaterial nanotechnologyCalcium/strontium/barium sulfatesCalcium crystalsAlcohol
The invention discloses a phosphogypsum waste residue treatment method, which comprises the following steps: washing phosphogypsum waste residues with deionized water, drying, grinding, and sieving toobtain pretreated phosphogypsum powder; uniformly mixing and stirring glycerol and absolute ethyl alcohol, then adding dodecyl trimethyl ammonium bromide, and continuously stirring until a solid is dissolved to prepare a solution A; mixing and stirring the prepared pretreated phosphogypsum powder and a nitric acid solution, then adding a sulfuric acid solution, continuously stirring to prepare asolution B, slowly dropwise adding the prepared solution A into the solution B, transferring the prepared mixture into a reaction kettle by adopting intermittent ultrasonic treatment, reacting, cooling to room temperature after the reaction is finished, and filtering the reaction solution to obtain a filtrate; and filtering to obtain a solid, and drying the solid to obtain the nano calcium sulfatecrystal. The method is simple to operate, and the prepared nano calcium sulfate crystal is good in stability, has the particle size of 30-50nm and is good in dispersion.
Owner:福泉环保城发展有限公司
Continuous production system and method for producing low-water-content calcium sulfate from waste sulfuric acid
ActiveCN111362292ALow free moisture contentGuaranteed continuous responseCalcium/strontium/barium sulfatesContinuous reactorCalcium crystals
The invention provides a continuous production system and method for producing low-water-content calcium sulfate from waste sulfuric acid. The continuous production system for producing the low-water-content calcium sulfate from the waste sulfuric acid comprises a limestone slurry supply unit, a waste sulfuric acid supply unit, a quick lime slurry supply unit, a four-stage continuous reactor, a solid-liquid separation unit and a tail gas absorption unit. The reaction process of the waste sulfuric acid, limestone and lime is accurately controlled, and a crystal modifier and a calcium sulfate seed crystal are added to regulate and control the particle size of calcium sulfate particles to obtain large-particle calcium sulfate crystals, so that the free water content of the gypsum product is lower than 10%, and the continuous reaction is ensured by using instrument control means such as an electromagnetic flowmeter, a pH online instrument and the like in the reaction process. The method has the advantages of no waste residue or waste liquid, up-to-standard emission of waste gas, clean and environment-friendly process, and provision of a new approach for resource utilization of waste sulfuric acid.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI
Amorphous hyaluronic acid-magnesium/calcium polyphosphate microparticles for cartilage regeneration and repair
InactiveUS20180015205A1Improve adhesionUpregulates expressionPowder deliveryOrganic active ingredientsBiomechanicsIon calcium
This invention concerns a biomimetic material based on energy-rich amorphous magnesium polyphosphate (Mg-polyP) microparticles that enhance cartilage synthesis and regeneration. One preferred formulation of the inventive material is a hyaluronic acid-Mg / Ca-polyP paste that can be produced from a water-soluble salt of polyP and water-soluble hyaluronic acid in the presence of water-insoluble / nearly insoluble calcium carbonate. Surprisingly, the inventor found that this cartilage-like material comprising amorphous Mg / Ca-polyP microparticles promotes the adhesion of chondrocytes and strongly upregulates the expression of the chondrocyte marker genes encoding alkaline phosphatase, collagen type 3A1, aggrecan and Sox9. The material through scavenging calcium ions (Mg2+ / Ca2+ exchange) and binding of the calcium-polyP to hyaluronic acid shows biomechanical properties, comparable to cartilage and thus can be used for prevention of calcium crystal formation in the synovial fluid and treatment of joint dysfunctions caused by osteoarthritis.
Owner:NANOTECMARIN
Mineral admixture and preparation method thereof
ActiveCN112279532AEmission reductionHigh value-added utilizationCement productionCalcium silicateSilicic acid
The invention belongs to the technical field of building materials, and particularly relates to a mineral admixture and a preparation method thereof. The proportion of a crystalline phase in the mineral admixture is 60% by mass or more. Based on the total mass of the crystalline phase, the crystalline phase comprises 0-10% of dicalcium silicate crystals, 0-3% of calcium oxide crystals, 50-85% of iron oxide doped calcium sulphosilicate crystals, 0-12% of calcium sulphoaluminate crystals and 0-15% of tetracalcium aluminoferrite crystals. The mineral admixture disclosed by the invention has highhydration activity, and after the mineral admixture is used for replacing 30% of reference cement, according to a GBT 1596-2005 test, the 3d activity index is greater than 115%, the 7d activity indexis greater than 135%, and the 28d activity index is greater than 130%. Meanwhile, industrial solid waste can be used as a raw material for preparation, and waste is turned into wealth.
Owner:BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
Light-weight high-strength calcium silicate board for coating/film covering and preparation method of light-weight high-strength calcium silicate board
The invention relates to a light high-strength calcium silicate board for coating / laminating and a preparation method thereof, the calcium silicate board comprises the following raw material components by weight: 22%-33% of a siliceous material, 20%-30% of a calcareous material, 8%-30% of cement, 8%-20% of calcium silicate crystals, 5%-15% of fiber pulp, 3%-10% of an inorganic filler and 2%-6% of a board inorganic auxiliary agent; the preparation method comprises the following steps: adding water into all the raw material components, uniformly mixing, then preparing a light calcium silicate board blank through a beater-addition process, then curing, then carrying out an autoclaved reaction to obtain a light calcium silicate board semi-finished product, then drying the moisture to be below 10wt%, and then sanding and trimming to obtain a light high-strength calcium silicate board finished product. The calcium silicate board provided by the invention is a high-quality board which is low in density, high in strength, good in dimensional stability, high in internal bonding strength and excellent in fireproof performance, the density of the calcium silicate board is 0.6-1.0 g / cm < 3 >, the breaking strength of the calcium silicate board is 10 MPa or above, the internal bonding strength of the calcium silicate board is 1.6 MPa or above, and the technological requirements of coating, film covering and the like are met.
Owner:天津中晶建筑材料有限公司
Preparation method of D-pantoic acid calcium
InactiveCN112209819ASimple manufacturing methodRaw materials are easy to getOrganic chemistry methodsCarboxylic acid salt preparationCalcium hydroxideCalcium crystals
The invention provides a preparation method of D-pantoic acid calcium. The preparation method comprises a step of reacting D-pantolactone with calcium hydroxide to obtain a mixed solution containing D-pantoic acid calcium. The preparation method provided by the invention is simple and feasible, a solvent is safe and pollution-free, stable crystals can be formed under a low-temperature condition, and the obtained D-pantoic acid calcium crystals are non-sticky to the wall, non-caking, few in impurities and high in purity.
Owner:安徽泰格生物科技有限公司
A method of sequestering carbon dioxide
ActiveCN109516912BAchieving zero emissionsAvoid lossInorganic/elemental detergent compounding agentsNon-ionic surface-active compoundsCalcium crystalsCarbon dioxide production
The invention discloses a method for sequestering carbon dioxide, which is directly applied to the production of oxalate after trapping and absorbing carbon dioxide with an inorganic base. The oxalate is used as a detergent additive in laundry detergent. Salt and calcium ions in water form calcium oxalate crystals, thereby realizing the utilization and mineralization of carbon dioxide. The present invention absorbs carbon dioxide through carbonate and directly uses it in the production of oxalate, avoiding a large amount of energy loss in the regeneration process of the adsorbent, and the whole process can realize zero emission; the oxalate produced from carbon dioxide is used as detergent Additives, through the combination of oxalate radicals and calcium ions during the washing process to form calcium oxalate precipitation, finally realize the mineralization and storage of carbon dioxide and alleviate the greenhouse effect.
Owner:TAIYUAN UNIV OF TECH
Radial calcium carbonate biological filler, preparation method and application thereof in sewage treatment
InactiveCN113149212AReduce yieldNot easy to disperseWater contaminantsTreatment with aerobic and anaerobic processesMicroorganismCalcium crystals
The invention discloses a radial calcium carbonate biological filler, the biological filler is a radial calcium carbonate crystal, the radial calcium carbonate crystal comprises radial calcium carbonate branches, the diameter of the radial calcium carbonate branches is 50-2000 [mu] m, and the number of the radial calcium carbonate branches is 4-100. The radial calcium carbonate biological filler is used as a framework, granular sludge cenobium is formed, the cenobium is not prone to being dispersed by water flow and aeration, better anaerobic, anoxic and aerobic microenvironments can be formed in the cenobium, the optimal growth microenvironment is provided for various microorganisms, and the nitrogen and phosphorus removal and COD reduction capacity of the bioreactor is effectively improved.
Owner:四川绵阳岷山实业集团有限公司
Process for producing anhydrous gypsum from calcium sulfite hemihydrate
PendingCN112897563ASolve stacking problemsGood economic valueCalcium/strontium/barium sulfatesCalcium crystalsPhysical chemistry
The invention relates to a process for producing anhydrous gypsum from calcium sulfite hemihydrate, and belongs to the technical field of gypsum production. The process for producing anhydrous gypsum from calcium sulfite hemihydrate comprises the following steps: (1) calcining the calcium sulfite hemihydrate to dehydrate and oxidize the calcium sulfite hemihydrate to form calcium sulfate and form calcium sulfate II crystals; (2) modifying the generated calcium sulfate II by using a ball mill; and (3) treating the calcium sulfate II by using an exciting agent to form an anhydrous type II gypsum building material product. According to the invention, the calcium sulfite hemihydrate can be produced into anhydrous type II gypsum-based self-leveling mortar, anhydrous type II gypsum-based plastering mortar and other products, and can be widely used in building material and building industries. According to the process, the desulfurized fly ash is used as a raw material, so that the problem of desulfurized fly ash stacking is solved, and considerable economic value can be created.
Owner:SHIJIAZHUANG WUXING MACHINERY
A kind of method utilizing ferulic acid to regulate and prepare calcium carbonate crystal particles
InactiveCN104649309BIn line with the policy of developing circular economyCalcium/strontium/barium carbonatesCalcium crystalsPhysical chemistry
Owner:ZHEJIANG SCI-TECH UNIV
A method of using zeolite and fly ash to strengthen liquefied sand foundation
Owner:上海先科桥梁隧道检测加固工程技术有限公司
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