6 results about "N-dodecane" patented technology

The present application relates to the technical field of nuclear fuel cycle and radioactive waste treatment, in particular to a method and system for treating uranium-containing organic phase, the system comprises pretreatment washing tank, pyrolysis reactor, phase separation tank, uranium recovery device, vacuum distillation device, tail gas treatment device and solidification device connected in sequence; the method first removes acid by water washing pretreatment of uranium-containing organic phase at 40-50 DEG C, then adds phosphoric acid to catalyze pyrolysis to decompose TBP and transfer uranium to phosphoric acid phase, recovers uranium and n-dodecane after phase separation, simultaneously treats tail gas and solidifies residual waste, and further provides online monitoring and control subsystem to realize automatic control and safety interlocking; the present application has mild reaction condition, avoids strong corrosive substance generation, total uranium recovery rate reaches more than 90%, about 80% of n-dodecane can be recycled, greatly reduces radioactive waste production amount, is safe and reliable in operation, and is suitable for radioactive waste organic extractant reduction and resourceful treatment in nuclear fuel cycle.

This invention discloses a novel method for preparing a clean fuel additive, relating to the field of clean fuel additive technology. Its components include: a main cleaning agent: Mannich base; a dispersant: polyetheramine; a surfactant: highly active polyisobutylene; an antioxidant: N,N-di-sec-butyl-p-phenylenediamine; an octane booster: dimethyl carbonate; a solvent: 120# solvent oil; a combustion improver: C9-C11 mixed olefins; a stabilizer: trimethylolpropane; an ignition promoter: nitrobenzene; and auxiliary additives: n-dodecane, sodium polystyrene sulfonate, and eugenol methyl ether. This invention achieves a significant synergistic effect among the core components such as Mannich base, polyetheramine, polyisobutylene, amine antioxidants, and dimethyl carbonate. This synergistic effect allows the additive to comprehensively optimize the cleanliness, anti-knock properties, stability, and combustion efficiency of fuel at a relatively low total addition amount.

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.

The application relates to the technical field of cetane number testing, and discloses standard fuel and application of the standard fuel in a fuel cetane number determination method. The standard fuel comprises low-cetane-number normal standard fuel and high-cetane-number normal standard fuel; wherein the low-cetane-number normal standard fuel is a hanging type tetrahydrodicyclopentadiene, and the high-cetane-number normal standard fuel is selected from one of normal dodecane, normal decane and normal tetradecane. The standard fuel provided by the application has a good volume linear relationship, strictly meets the requirements of normal standard fuel, can expand the cetane number determination range of test fuel to 21.88-81.19, can greatly reduce the test cost, and is suitable for promotion.

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 application discloses a kind of liquid drop high-temperature turbulent flow conditions under the evaporation fast prediction method and system, prediction method: obtaining ambient temperature, ambient pressure, liquid drop temperature, liquid drop boiling point temperature, to calculate the saturation vapor pressure of liquid drop evaporation, reference temperature, equivalent molecular mass, gas dynamic viscosity;Based on reference temperature, calculate binary diffusion coefficient;The gas phase density and liquid phase density of liquid drop evaporation are calculated;The evaporation rate constant of liquid drop is calculated and the influence of Stefan flow is introduced;Custom non-dimensional parameter is calculated, to carry out linear fitting to evaporation rate constant and custom non-dimensional parameter and obtain numerical relationship formula.The application can be used in the evaporation rate prediction in the field of numerical simulation simulation liquid drop evaporation, by studying the evaporation behavior of n-dodecane single liquid drop under turbulent flow conditions, it has significant meaning for improving the combustion reaction in internal combustion engine.