88 results about "Crystal morphology" patented technology

The invention belongs to the technical field of automatic control, and discloses a cyclopropylamine (R)-mandelate crystallization process feedback control method, which comprises the following steps: acquiring the concentration, solvent temperature, stirring speed and pH value of cyclopropylamine (R)-mandelate in a solvent in real time, and forming a state parameter set reflecting the real-time state of a cyclopropylamine (R)-mandelate crystallization system; based on the state parameter set, deriving a solute supersaturation degree change rate, a nucleation rate and a crystal growth rate by adopting an explicit kinetic relationship to obtain a kinetic feature set of the cyclopropylamine (R)-mandelate; collecting the grain size, the shape and the crystallization uniformity of the crystal, and constructing a corresponding crystal quality prediction function in combination with the kinetic feature set of the cyclopropylamine (R)-mandelate to obtain a predicted crystal quality index; comparing the actually detected crystal morphology index with the predicted crystal quality index, and calculating to obtain a deviation value; the crystal quality of the cyclopropylamine (R)-mandelate is improved.

The application belongs to the technical field of inorganic fine chemical phosphate purification, and provides a high-purity trisodium phosphate and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a trisodium phosphate saturated crude slurry; (2) adjusting the quality of the slurry: after the trisodium phosphate saturated crude slurry is warmed, it is placed and kept warm; (3) purification: the temperature of the adjusted slurry is controlled and kept; then, anhydrous trisodium phosphate homologous slow-release seeds are added into the slurry; the system supersaturation is adjusted in two stages; the stirring is stopped to perform normal-pressure static crystal growth, and the purified slurry is obtained; and (4) post-treatment. The prepared high-purity trisodium phosphate has extremely low impurity contents of heavy metals and anion by-products, and has regular crystal morphology and strong crystal form stability, and is not prone to problems such as caking and hydrolysis during storage.

The invention discloses a nano NON molecular sieve as well as a preparation method and application thereof. The crystal morphology of the nano NON molecular sieve is a nano particle, and the average diameter of the crystal is 50-140 nm. The molecular sieve has the advantages of nano-particle morphology, uniform particle size and small size; the molecular sieve can be used as an adsorbent or a catalyst for conversion of organic compounds, and has good performance.

The invention provides a blank molding assembly block of diamond large single crystals and a plastic growth method, and belongs to the technical field of superhard material synthesis. The blank molding assembly block comprises a mutually-embedded metal catalyst layer formed by mutually embedding a plurality of prismatic table metal catalyst structures, the whole mutually-embedded metal catalyst layer is in a prismatic table shape, one of the upper end face and the lower end face of each prismatic table metal catalyst structure is in contact with the high-purity graphite carbon source layer, and the other one of the upper end face and the lower end face of each prismatic table metal catalyst structure is in contact with the seed crystal; the adjacent prismatic table metal catalyst structures are separated by an insulating layer, and the insulating layer is a Ca coating or a BN coating. A mutually-embedded prismatic-table-shaped metal catalyst structure with an axial temperature gradient and a carbon diffusion channel is constructed in a blank assembly block, diamond is induced to grow in a preset direction in an HPHT environment, directional shaping growth of the diamond is achieved under the condition that the process complexity is not improved, and the quality of the diamond is improved. The crystal morphology controllability, the catalytic agent utilization efficiency and the final drilling rate are remarkably improved, and the single-cavity yield is increased.

The application discloses a nano aluminophosphate molecular sieve and a synthesis method thereof. The crystal structure of the aluminophosphate molecular sieve is an aluminophosphate-A type crystal structure, the crystal morphology is similar to a cube, and the crystal edge length is 30-110 nm. The crystal outer surface has irregular step lines, and with the decrease of the crystal size, the crystal morphology tends to be a sphere. The synthesis method of the nano aluminophosphate molecular sieve comprises the following steps: (1) preparing initial gel materials; (2) performing crystallization treatment on the gel obtained in the step (1) under crystallization reaction conditions; (3) further separating after the crystallization treatment, and then treating under drying conditions and calcination conditions to obtain the nano aluminophosphate molecular sieve. The synthesis method adopts a novel structure directing agent to synthesize the nano aluminophosphate molecular sieve, and the synthesis process is simple and operable, and the target product can be obtained without harsh conditions.

To provide a compound for use as a medicine.SOLUTION: Provided are a compound of formula (1) as an anhydrate which is in a crystalline Form 2, characterized by having a powder X-ray diffractogram presenting peaks expressed as degree 2θ angles at about 9.5, 11.8, 14.1, 14.6, 17.7, and 18.5, and a solid form thereof.SELECTED DRAWING: None

The invention relates to the technical field of regulation and control of ethylene glycol antimony, in particular to a preparation method for conveniently regulating and controlling the morphology of ethylene glycol antimony crystals, which comprises the following steps: adding an antimony source and ethylene glycol into a reaction kettle according to a mass ratio of 1: (3-8), and stirring until the antimony source is completely dissolved to obtain an antimony source-ethylene glycol solution; and adding a crystal morphology regulating agent into the obtained solution, and uniformly stirring and mixing. By selecting different types of regulating agents and adjusting the dosage, flaky (1-5 microns), columnar (length-diameter ratio is (3-5): 1) or spherical (0.5-2 microns) ethylene glycol antimony crystals can be stably prepared, and the requirements of different polyester synthesis scenes are met.

The invention provides a preparation method of micro-nano anhydrous gypsum with various crystal forms, and belongs to the technical field of recycling of inorganic non-metallic materials and solid wastes. The method comprises the following steps: by taking phosphogypsum as a raw material, firstly washing and drying the phosphogypsum; then, selecting different reaction medium systems and corresponding crystal form / morphology control agent combinations, and regulating and controlling corresponding reaction temperature, time and stirring rate to directionally prepare a micro-nano anhydrous gypsum precursor with spherical, short columnar, layered or cubic morphology; and finally, filtering, washing, drying and calcining to obtain a final micro-nano anhydrous gypsum product. According to the invention, through precise regulation and control of process conditions, controllable preparation of the morphology of the anhydrous gypsum crystal is realized, the added value of the product is high, and a new way is provided for high-quality utilization of phosphogypsum.

The application relates to the field of molecular sieves, and discloses a ZSM-5 molecular sieve, a preparation method and application thereof, and a catalytic cracking method of triisopropylbenzene. The ZSM-5 molecular sieve has a cross-assembled aggregate crystal morphology formed by sheet-shaped nanocrystals, and the sheet-shaped nanocrystals adjacent to each other in the molecular sieve have a cross-assembled aggregate crystal morphology formed by 90 DEG + / -10 DEG rotation symbiosis and 30 DEG + / -5 DEG rotation symbiosis.

The invention discloses a battery grade ferrous sulfate continuous cooling crystallization method and system based on a crystal form directing agent, and the method comprises the following steps: mixing a purified ferrous sulfate solution with a nanoscale CHA / MOR molecular sieve crystal form directing agent, feeding the mixture into a multi-stage continuous crystallization kettle, carrying out temperature control crystallization, and finally carrying out solid-liquid separation to obtain a product, the system correspondingly comprises a crystallization kettle, a crystal form guiding agent and a seed crystal adding unit which are connected in sequence, the crystal morphology is actively regulated and controlled by utilizing the specific crystal form guiding agent, and the high-tap-density columnar crystal is obtained; an electric field is arranged in a crystallization transition area, so that in-situ directional migration and deep removal of foreign ions are realized; a crystal form memory elimination module is integrated, impurity circulation is broken through rapid freezing-instantaneous heating, efficient and energy-saving deep purification is achieved, the problems that in battery-grade ferrous sulfate production, the crystal morphology is uncontrollable, the impurity content is high, the technological process is long, and energy consumption is large are synchronously solved, and the product is high in purity and good in physical performance; the method is especially suitable for preparing a lithium ion battery positive electrode material precursor.

The present disclosure relates to an ANA-structure faujasite zeolite and a preparation method thereof, a unit cell chemical formula of the ANA-structure faujasite zeolite being |Na x |[Si y Al z O 96 ] wherein x = 6-15, y = 30-37, and z = 10-16; the ANA-structure faujasite zeolite has a spherical crystal morphology. The ANA-structure faujasite zeolite of the present disclosure has a spherical crystal morphology and exhibits excellent molecular diffusion performance, and has good application prospects in the fields of small molecule acid catalytic reactions, small molecule gas adsorption separation, ion adsorption purification, and the like.

This invention provides a radially temperature-adjustable crystal growth apparatus and method, relating to the field of silicon carbide crystal growth technology, to improve the technical problem of inconvenient radial temperature gradient adjustment of the crystal to be grown in the prior art. It includes a heating furnace, a crucible, and a radial temperature gradient adjustment device; the crystal to be grown and silicon carbide powder are respectively arranged inside the crucible; the radial temperature gradient adjustment device is disposed on the top wall, and includes a driving component and multiple heat reflectors connected to the driving component; the multiple heat reflectors selectively move above the crystal to be grown under the action of the driving component to reflect at least a portion of the heat above the crystal to be grown to the crystal, thereby adjusting the radial temperature gradient at the growth interface of the crystal. This invention can effectively reduce crystal defects, improve substrate yield, and obtain the desired crystal morphology.

The present invention provides omadacycline crystalline free base and a method for synthesizing the same. The present invention also provides pharmaceutical compositions containing omadacycline crystalline free base and methods for using the same to treat bacterial infections. The present invention also provides a method for purifying crude omadacycline free base, including crystallization to produce crystalline omadacycline free base. The omadacycline crystalline free base can also be used to prepare salts of omadacycline, such as the tosylate salt.

The invention discloses a multi-port optical switch based on a phase change material and nonvolatile regulation and control. Different combination states of the phase-change material units are realized by arranging the plurality of phase-change material units and by means of crystal form control of the phase-change material units, so that a transmission path of an optical signal in a multimode interference region is changed, full logic mapping of the optical signal at a plurality of output ports and input ports is realized, and the optical switch supports a 1 * N or M * N optical switch matrix. A plurality of basic units do not need to be connected in series or in parallel, so that high-integration-level implementation of an integrated circuit is facilitated, and a foundation is provided for subsequent large-scale extension. Meanwhile, the phase change material is adopted to regulate and control the multimode interference area of the optical switch, power consumption can be remarkably reduced, and the optical switch is suitable for long-term stable optical path configuration and has the advantages of being small in size, high in integration degree, high in switching rate and the like.

The application relates to the field of molecular sieves, and discloses a ZSM-48 molecular sieve, a preparation method and application thereof, a hydrogen type ZSM-48 molecular sieve, a preparation method and application thereof. The molecular sieve has a nanosheet morphology formed by agglomeration of nanoparticles, the length of the nanoparticles is not higher than 50 nm, and the length of the nanosheet is not higher than 1000 nm. The ZSM-48 molecular sieve has the nanosheet morphology formed by agglomeration of nanoparticles, the crystal morphology is special, the accessibility is good, and the ZSM-48 molecular sieve has good catalytic performance in organic matter conversion reactions.

Disclosed are crystalline forms of the compound of formula (I): (I) Also disclosed are compositions containing the crystalline forms of the compound of formula (I) and methods of their use. The methods may be for treating cancer in a subject in need thereof, e.g., by administering to the subject an effective amount of the crystalline form disclosed herein or its composition.

The invention provides an SAPO-34 molecular sieve and a preparation method and application thereof, the crystal morphology of the SAPO-34 molecular sieve is a sheet structure, the length of the sheet structure is less than or equal to 1.0 mu m, the width is less than or equal to 1.0 mu m, and the thickness is less than or equal to 500nm. The SAPO-34 molecular sieve provided by the invention is applied to a methanol-to-olefin reaction, has higher low-carbon olefin selectivity, is remarkably improved in reaction stability, and is suitable for industrial production and application.

The application discloses an aragonite whisker preparation method and system based on image recognition and multi-model prediction, and comprises the following steps: in each sampling period, a microscopic image of reaction slurry is subjected to mask extraction, skeleton thinning, cross point breaking and ellipse fitting processing, an average observation vector of crystal size is decoupled and output, a 2D-PBM is input with estimated liquid phase ion concentration, a two-dimensional growth kinetics model is combined, and a posterior state vector at the current moment is obtained; an ESN proxy model is used to replace the 2D-PBM, and the crystal morphology evolution trajectory in the future time domain is deduced within the current sampling period; air inlet component fluctuation is fed forwardly compensated, and adjustment instructions for temperature and air inlet flow are output and executed. The application realizes direct and real-time closed-loop control on the aspect ratio of acicular crystals, suppresses morphology degradation caused by impurity fluctuation, and improves product quality and aragonite phase purity.

The invention discloses crystal separation equipment for producing menthol with high cool degree and low bitter degree, and relates to the technical field of medicinal material processing, the crystal separation equipment comprises a plurality of temperature control crystallization tanks and a plurality of crystallization buckets capable of rising and falling, the crystallization buckets are arranged on the inner sides of the temperature control crystallization tanks, the side walls of the crystallization buckets are provided with a plurality of separation holes distributed at equal intervals along an annular track, and the separation holes are communicated with the temperature control crystallization tanks. And an intercepting ring for covering the separation hole is arranged on the inner side of the temperature control crystallizing tank. According to the menthol crystallization device, mother liquor distributed on the upper portion in the crystallization barrel can be discharged into the temperature control crystallization tank through the separation holes, so that the aim of conducting pretreatment operation on a large amount of crystallized menthol is achieved. The liquid-solid proportion in the subsequent separation operation process is reduced, and the load of equipment for performing precise separation operation on menthol subsequently is reduced. The impurity entrainment amount in a large number of crystals can be preliminarily reduced, the phenomenon that the crystals are broken or dissolved due to excessive mother liquor during subsequent precise separation can be effectively avoided, and the crystal form of menthol in the subsequent high-purity separation operation process is protected.

The invention discloses an n-type silicon carbide crystal and a liquid phase growth method thereof, and belongs to the technical field of semiconductors. By changing the formula of a growth raw material for silicon carbide growth, the growth raw material is configured to be SixCryMz, the molar ratio x of Si to the raw material is 40-76%, the molar ratio y of Cr to the raw material is 20-60%, and the molar ratio z of M to the raw material is 1-4%; m is one or more of Sc, Ti, V, Cr, Mn, Fe, Co, Cu, Zn, Y, Zr, Nb, Mo, Ce, La, Tb, Nd, Ta and Pr. According to the method, other elements M are doped on the basis of a Si-Cr system, the liquid growth method is matched to replace an Al element to improve the crystal morphology, meanwhile, evaporation of solution components can be inhibited, and the growth system can be kept stable for a longer time, so that the n-type silicon carbide crystal with more uniform surface steps can be grown.

The invention discloses a method for preparing high-whiteness superfine anhydrous gypsum by purifying industrial by-product gypsum, which comprises the following steps: by taking the industrial by-product gypsum as a raw material, firstly, carrying out deep purification pretreatment to obtain gypsum of which the whiteness is greater than or equal to 55% and the content of CaSO4. 2H2O is greater than or equal to 95%; and sequentially carrying out dilute acid dissolution, organic matter extraction and crystal transformation whitening treatment on the pretreated gypsum to obtain the high-whiteness superfine anhydrous gypsum with the whiteness of more than or equal to 90%. The obtained high-whiteness superfine anhydrous gypsum is high in whiteness, finer in fineness and controllable in crystal form and crystal appearance, and compared with anhydrous gypsum obtained through a calcination method, the high-whiteness superfine anhydrous gypsum is low in energy consumption, small in carbon emission, high in benefit and suitable for wide popularization and implementation.

The present application relates to a urine treatment method and a urine treatment system. Specifically, the present application discloses a urine treatment method, comprising the following steps: S1. Dehydrating urine without separating urine sediment and supernatant in advance, gradually dehydrating the urine, and sequentially precipitating various crystals until all of them are precipitated; S2. Qualitatively and / or quantitatively analyzing at least one of oxalate, uric acid and urate, phosphate, magnesium ammonium phosphate, and cystine crystals with specific crystal morphology in the crystals to obtain relevant parameters of the target crystals. The present application also discloses a urine treatment system for implementing the urine treatment method.

The application provides a method for preparing a low-humidity water-absorbing aluminum-based MOF material single crystal based on carboxylate hydrolysis. The aluminum-based MOF single crystal material has a crystal size greater than 20 microns. Compared with the powder material, the aluminum-based MOF single crystal material has a more complete crystal morphology, higher crystallinity, fewer defects and a larger crystal size, thereby having higher stability, higher water absorption and faster water absorption rate. The single crystal can be used as an adsorbent to absorb a large number of water molecules from air under low humidity conditions (< 30% RH). The single crystal preparation method is based on the hydrolysis reaction of carboxylate organic ligands. By adjusting the pH value of the reaction solution, the hydrolysis rate of the carboxylate and the coordination reaction process can be accurately controlled, the reaction rate is reduced, the crystal growth time is prolonged, the internal structure defects of the product are reduced, the crystallinity of the material is improved, the high-crystallinity large-size single crystal is obtained, and finally the good stability and high water absorption performance under low humidity are realized. The application provides a new way for performance regulation of water-absorbing MOF materials.

The invention provides a synthesis method of single-crystal manganous-manganic oxide, a positive electrode material, a battery and power-related equipment, and relates to the technical field of lithium batteries. The synthesis method is used for carrying out solid-phase treatment on a manganous-manganic oxide raw material, and comprises the following steps: heating the manganous-manganic oxide raw material in a multi-stage gradient heating process; and using inert atmosphere and oxygen-containing atmosphere at different stages of the multi-stage gradient heating so as to obtain single crystal manganous-manganic oxide with a pure cubic spinel phase. According to the synthetic method of the single-crystal manganous-manganic oxide, solid-phase treatment of multi-stage gradient heating is carried out under inert and oxygen-containing atmospheres, crystal phase reconstruction is induced, and a pure cubic spinel phase single-crystal material with high structural integrity can be stably obtained. According to the method, by controlling the heating rate and atmosphere switching in stages, the crystal morphology is accurately regulated and controlled, the truncated (111) surface is formed, the process is simple, and chemical additives are not needed.

This invention belongs to the field of phase change heat transfer technology, specifically disclosing a controlled condensation and frosting visualization experimental device for gas flow in ultra-low temperature environments. Addressing the problems of current condensation and frosting visualization experimental devices, this invention designs a multifunctional experimental device capable of observing the gas-liquid-solid phase change process and measuring heat transfer performance. This device can not only observe the gas-liquid-solid phase change process during low-temperature gas flow under different operating conditions, but also investigate the effects of various factors such as fluid velocity, initial temperature, pressure, gas composition, and wall materials on the gas frosting process, frost crystal morphology, and frost layer properties, as well as the influence of different factors on the gas phase change heat transfer performance. Conducting phase change heat transfer experiments with different low-temperature fluids using the condensation and frosting visualization experimental device proposed in this invention can provide data support for the optimized design of heat exchangers for different fluids and the design of CO2 capture devices.

The invention discloses a composite ERI molecular sieve and a synthesis method and application thereof, and belongs to the field of molecular sieves. The composite ERI molecular sieve not only has an ERI topological structure and a uniform submicron firewood-bundle-shaped crystal morphology, but also has silicon-aluminum and SAPO regions, and integrates the characteristics and advantages of SAPO-17 and silicon-aluminum ERI molecular sieves. The molecular sieve loaded with Cu < 2 + > ions can be used as a denitration catalyst (NH3-SCR), and shows excellent activity and catalyst stability.

The invention relates to a high-carbon bearing steel rolled round steel dendritic crystal macroscopic corrosion observation method in the technical field of metal material metallographic detection, and aims to solve the problem that in the prior art, a dendritic crystal structure cannot be quickly and directly observed by naked eyes at a low cost on a production site. According to the technical scheme, the method is characterized by comprising the following steps: cutting out a cross section sample, carrying out wet grinding, corroding at 75-80 DEG C for 3-5 minutes by adopting a hydrochloric acid aqueous solution with the volume ratio of 1: 1, neutralizing and cleaning, directly observing the dendritic crystal morphology by naked eyes, and grading. The method is mainly used for rapidly screening the solidification quality of the high-carbon bearing steel rolled round steel on a production site.

To provide a new crystal form of lesmerome having improved characteristics and a method for preparing the same.SOLUTION: Crystalline form CSVI having an XRPD pattern as shown in the Figure is obtained by a process comprising: (1) adding Compound I below to a nitrile or a solvent mixture of nitrile and water, stirring, separating and drying to obtain Form CSVI; or (2) dissolving Compound I below in a solvent mixture of nitrile and water or a solvent mixture of nitrile and alcohol, filtering, cooling and stirring the filtrate to obtain a solid, separating and drying to obtain Form CSVI.SELECTED DRAWING: Figure 1

The present application belongs to the field of chemical engineering and medicine manufacturing, and particularly relates to a method for regulating drug crystal form by oxidizing nanocellulose and application. By inducing the generation of sulfathiazole crystals in TCNF solutions with different concentrations, the nucleation and growth process of the sulfathiazole crystals is controlled, so that different morphologies and structures of the sulfathiazole crystal forms are obtained, and the transformation of the sulfathiazole crystals from flaky, prismatic to regular hexagonal crystal forms is realized. The sulfathiazole crystal form prepared by the method has better crystal morphology and consistency, the method is simple and effective, is suitable for crystal form optimization and large-scale production of polymorphic drugs, and has important industrial application value.

The application relates to the technical field of sodium ion batteries, in particular to a single-crystal morphology sodium ion battery positive electrode material and a preparation method and application thereof. w Ni x Fe y Mn 1‑x‑y‑z‑a B z Bi a O2, wherein w<=0.75, 0 The B and Bi elements are co-doped to modify the prepared positive electrode material to have a single-crystal morphology, the performance degradation problem caused by the broken crystal boundary is avoided, the single-crystal morphology sodium battery ternary positive electrode material prepared by the application can still maintain good structural integrity after multiple cycles, and the cycle life is improved. Meanwhile, the electrochemical performances such as the discharge specific capacity, rate performance and cycle retention rate of the sodium battery ternary positive electrode material are also remarkably improved.