8 results about "N-tetradecane" patented technology

The invention relates to the field of plasma separation and detection, in particular to a composition for separating plasma and a using method thereof. The composition comprises: a phase change component, which is selected from n-alkanes, which are selected from at least one of n-tetradecane, n-pentadecane, n-hexadecane, n-heptadecane, n-octadecane, n-nonadecane, n-eicosane, n-heneicosane or n-docosane; a liquid phase carrier component, wherein the liquid phase carrier component is selected from silicone oil; the structural framework and rheology regulation and control component comprises fumed silica, and the structural framework and rheology regulation and control component comprises fumed silica; the dispersion and stabilization auxiliary agent component is selected from at least one of TiO2 and BaSO4, the density adjusting filler component is selected from at least one of TiO2 and BaSO4, and the dispersion and stabilization auxiliary agent component comprises a silane coupling agent. According to the device, plasma and blood cells can be reliably, rapidly and effectively separated only through one-time low-temperature centrifugation, and remixing caused by transportation jolting can be avoided.

The invention relates to an iron-containing ZSM-5 molecular sieve, a preparation method thereof and an n-tetradecane catalytic cracking method, and the method comprises the following steps: S1, carrying out a first hydrothermal crystallization reaction on a first mixture containing a silicon source, an aluminum source, an alkali source, a seed crystal and water to obtain ZSM-5 molecular sieve mother liquor; and S2, mixing the ZSM-5 molecular sieve mother liquor, an iron source and water, and carrying out a second hydrothermal crystallization reaction on the obtained second mixture. According to the method disclosed by the invention, the iron-containing ZSM-5 molecular sieve with relatively excellent catalytic performance can be prepared.

The invention relates to a method for detecting the porosity of a compound fertilizer. The method comprises the following steps: S1, weighing a compound fertilizer sample to be detected with the weight of m1; s2, mixing the to-be-detected compound fertilizer sample with a solvent, soaking, and then removing the unadsorbed solvent to obtain a solvent-adsorbed compound fertilizer sample with the weight of m2; s3, calculating the porosity of the compound fertilizer sample to be measured; the solvent is selected from one or more of n-tridecane with the CAS number of 629 to 50 to 5, n-tetradecane with the CAS number of 629 to 59 to 4 and kerosene with the CAS number of 8008 to 20 to 6. According to the method, the porosity is calculated by utilizing the absorption amount of a solvent of the compound fertilizer. The method has the advantages of simplicity in operation, easiness in learning, low detection cost and the like; and meanwhile, by adopting the method disclosed by the invention, rapid detection of the porosity of the compound fertilizer can be realized, and the accuracy is relatively high.

The invention discloses a phase change material and a temperature control transport case using the same, and belongs to an application mode of the phase change material.The phase change material is prepared from, by weight, 70%-75% of n-tetradecane, 12%-16% of polyethylene glycol, 7%-10% of nanometer silicon dioxide, 2%-6% of polyurea resin, 0.4%-0.6% of butylated hydroxytoluene and 0.4%-0.6% of melamine. The phase-change material with the specific phase-change temperature is compounded, the latent heat capacity and the phase-change temperature range of the material can be improved, and after the phase-change material is applied to the temperature-control transportation box, the temperature-control transportation box is more suitable for transportation of articles such as vaccines and biological agents with high temperature requirements in cooperation with a heat preservation layer and a heat conduction structure; and long-time accurate temperature control and low-energy consumption use can be further realized by combining the PID temperature control module, and compared with a temperature control box of the same type, the temperature control box has more obvious advantages in the aspects of temperature control effect and cost control.

The invention relates to the technical field of offshore oil and gas exploitation, and particularly discloses a phase change microcapsule thermal insulation material for offshore oil and gas drilling fluid as well as preparation and application of the phase change microcapsule thermal insulation material. N-dodecane and n-tetradecane are compounded to serve as a core material, acetaldehyde, urea and melamine react to generate a wall material, a phase change microcapsule is prepared through the technologies of emulsification, prepolymer synthesis and the like, and the phase change microcapsule thermal insulation material is prepared. By combining with a constructed efficient water-based drilling fluid system, the heat conductivity coefficient and the rheological property are optimized, and synergistic improvement of heat insulation and stability is realized. And based on a Hasan shaft energy equation, an unsteady-state shaft heat transfer analytical model is established by applying Laplace conversion, the microcapsule addition amount is dynamically calculated, and the shaft temperature field is precisely regulated and controlled. The problems that a traditional inorganic material is low in mechanical strength and an organic material is poor in thermal stability are solved, the composite material has the advantages of efficient heat insulation, low process cost and high adaptability, and technical support is provided for safe operation of deepwater drilling.

This invention belongs to the field of mineral flotation technology, specifically relating to a method for improving the yield of clean coal in difficult-to-float coal slime. The method includes: S1, reagent preparation and pretreatment: Based on the coal quality characteristics, methyl linoleate is mixed with n-dodecane and / or n-tetradecane at a mass ratio of (1-5):1, and ultrasonically dispersed for 3 hours to form a microemulsion composite collector; S2, slurry conditioning and mineralization: The above collector (800-1600 g / ton dry coal slime) and a frother are added to a slurry with a concentration of 80 g / L and stirred for 3 minutes; S3, flotation separation: Air bubbles are introduced to scrape off the clean coal. This invention, through a microemulsion composite collector with a specific composition, significantly enhances the hydrophobicity of the surface of difficult-to-float coal particles and the adhesion efficiency with air bubbles, solving the problems of poor selectivity and low clean coal yield of traditional collectors. It has the advantages of strong adaptability, high flotation efficiency, and a significant increase in clean coal yield.

The invention discloses a mosquito trapping composition and a preparation method and application thereof, and relates to the technical field of daily chemical industry. According to the mosquito trapping composition, various different mosquito trapping components such as 2-undecanone, n-tetradecane and glucose are compounded, broad-spectrum trapping of various mosquitoes such as anopheles and aedes is achieved, meanwhile, the non-ionic surface active agent with the HLB value being 9-14 is utilized, and the mosquito trapping effect is good. The oil-soluble mosquito-trapping effective component and the water phase containing glucose can be compounded to form a stable microemulsion, so that the volatilization speeds of different mosquito-trapping components can be matched, and the system can be ensured to have higher storage stability and long-acting use effect.

The present invention discloses a rubber material for asphalt roads having both self-stress ice breaking and phase-change snow melting functions and a preparation method thereof. A stable oil-in-water emulsion is prepared with n-tetradecane as a phase-change core material, then KH550 modification is performed to promote cross-linking of graphene and vinyl MQ silicone resin, and then a prepolymer is subject to hydrolytic polycondensation on a surface of the oil-in-water emulsion using an in-situ emulsion polymerization method to prepare modified graphene oxide-vinyl MQ silicone resin composite wall material phase-change microcapsules; vinyl MQ silicone resin undergoes a cross-linking reaction with hydrogen-containing silicone oil, a cross-linking agent of rubber, through active vinyl groups borne on the surface, thereby achieving a strengthening effect, effectively improving viscoelasticity and stress-strain behaviors of the silicone rubber, and preparing the rubber material for asphalt roads having both good elasticity and phase-change energy storage function.