9 results about "Crystal morphology" patented technology

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.

This invention discloses an EU-1 molecular sieve and its synthesis method, belonging to the field of EU-1 molecular sieves; the EU-1 molecular sieve of this invention has a specific surface area S. BET ≥400m 2 / g, microporous specific surface area S micro ≥300m 2 / g; The synthesis method of the EU-1 molecular sieve includes the steps of mixing, aging, and segmental crystallization of a silicon source, an aluminum source, an alkali source, a template agent, and solvent I to obtain the EU-1 molecular sieve; the silicon source is a silicon source containing structural units; the synthesis method of the EU-1 molecular sieve of the present invention can modulate the induced nucleation microcrystals of the EU-1 molecular sieve within a wide range by controlling the crystallization time and temperature, thereby obtaining EU-1 molecular sieve products with high specific surface area and high crystallinity; by using a silicon source containing structural units as the silicon source, and by controlling the cations in the crystallization system, the EU-1 molecular sieve can be rapidly prepared, and the molecular sieve crystal morphology has the characteristics of uniform and highly dispersed.

The application belongs to the technical field of organic afterglow crystal materials, and particularly relates to an electron-rich material co-constructed organic long afterglow crystal material and a preparation method and application thereof. The electron-rich diphenylamine material which is easy to crystallize and cheap and easy to obtain is selected as a host material, and the electron-rich halogenated benzene derivative which is cheap and easy to obtain is introduced as a guest material, so that a series of crystal materials with regular structure are constructed, and a long afterglow luminescent new material with long afterglow time and adjustable color is obtained. The experiment proves that the electron-rich material co-constructed organic long afterglow crystal material provided by the application can be excited by ultraviolet light, has the characteristics of environmental stability, the afterglow time is more than 2s, and the crystal morphology can be regular, the afterglow color can also be adjusted, which shows the application potential in the information encryption and anti-counterfeiting fields, and can provide a theoretical basis and material basis for data encryption, anti-counterfeiting and other practical applications.

This specification describes the crystalline form of (S)-4-methyl-5-((4-((2-(methylamino)-6-(2,2,2-trifluoroethyl)thieno[2,3-d]pyrimidine-4-yl)amino)piperidine-1-yl)methyl)-1-(2-(4-(methylsulfonyl)piperazine-1-yl)propyl)-1H-indole-2-carbonitride or its solvate.

The application discloses a temperature gradient control forming method for thick-wall PEKK chromatographic column pipes and relates to the technical field of control forming methods, and comprises the following steps: S1, melt forming; S2, temperature gradient control; S3, crystallization behavior regulation; and S4, obtaining a target structure. Through non-contact buffering and weak cold setting, the cooling curves (temperature drop rates) of the inner, middle and outer three layers of the thick-wall pipe are highly coincident, the optical refraction boundary caused by the inner and outer crystallinity faults is avoided, the traditional cloud pattern or atomization phenomenon is significantly reduced or even completely eliminated, the pipe has excellent light transmittance under visible light, the crystal morphology and size of the material are uniform on the whole radial section through the gradient-controlled crystallization process, and the residual internal stress caused by the inconsistent shrinkage of the inner and outer layers is eliminated. When used as a chromatographic column pipe, the pipe can withstand extremely high fluid pressure without creep or radial deformation, and the yield of the product is greatly improved.

This invention discloses a method for preparing L-carnosine spherical crystals, comprising the following steps: dissolving L-carnosine in a good solvent, water, to obtain an aqueous solution containing L-carnosine; controlling the temperature of the aqueous solution and continuously stirring; adding a poor solvent to the L-carnosine-containing aqueous solution to precipitate L-carnosine spherical crystals; and separating and drying the spherical crystals to obtain the L-carnosine spherical crystals. The good solvent is water; the poor solvent is N,N-dimethylformamide and / or dimethyl sulfoxide. The preparation process of the L-carnosine crystals prepared by this invention is simple, involving only water and a poor solvent, and the process is straightforward. The particle size can be adjusted by the concentration of the aqueous solution and the stirring rate, resulting in an average particle size of 50–200 μm. The product particles are rounded, have high flowability, an angle of repose of 30°–37°, and a bulk density of 0.4–0.7 g / cm³. 3 This solved the problems of poor crystal morphology and poor particle flowability of L-carnosine.