8 results about "Tetradecane" patented technology

Provided herein are polymorphs and their salts, methods of making these, compositions and pharmaceutical compositions containing these, kits containing these, and method of treating disease or conditions in a subject with the polymorphs, their salts, and compositions and pharmaceutical compositions containing these.

The present application provides a naphtha directional adsorption separation method, and relates to the technical field of petroleum chemical industry.The present application adopts a double desorption agent process flow, uses stronger adsorption force between high carbon alkanes (n-dodecane, n-tetradecane or n-hexadecane) and adsorbents, solves the problems of incomplete desorption of low carbon alkanes desorption agent and low separation yield, and thus significantly improves the separation efficiency of the process.Meanwhile, the use of low carbon alkanes (n-pentane or n-hexane) to replace high carbon alkanes on the adsorbents can avoid the residue of high carbon alkanes on the adsorbents, and affect the recycling of the adsorbents.The present application adopts the double desorption agent process flow, which can ensure high separation efficiency and improve the utilization rate of the adsorbents at the same time.The present application can efficiently separate n-alkanes in naphtha, and the separated n-alkanes can be used as high-quality cracking ethylene (propylene) raw materials;the adsorption residual oil rich in isomeric alkanes, naphthenes and aromatic hydrocarbons can be used as high-quality catalytic reforming aromatic hydrocarbon raw materials.

This invention provides an antibacterial and anti-adhesion double-balloon tracheostomy cannula and its preparation method. The invention involves constructing a coating material co-loaded with a newly developed tetradecyl antibacterial agent and chondroitin sulfate on both the cannula's surface and inner wall. This coating possesses both excellent hydrophilicity and strong antibacterial properties. The hydrophilicity makes it difficult for secretions to adhere; the antibacterial properties kill bacteria through contact, minimizing the development of drug resistance; and the anti-adhesion properties reduce the basis for biofilm formation. These three properties work synergistically to achieve full-chain protection from the "source" to the "process," significantly reducing the risk of luminal obstruction and VAP (ventilator-associated pneumonia), while also reducing the frequency of suctioning and mucosal damage, thus improving patient comfort.

This invention relates to a method for determining related substances in pleroxafer using gas chromatography. The method includes detection using gas chromatography, wherein the gas chromatographic conditions are as follows: the stationary phase of the chromatographic column is phenyl-methylpolysiloxane; a temperature-programmed mode is used, wherein the temperature program includes: an initial temperature of 55-65°C held for 1-5 min, then increasing the temperature at 20-30°C / min to 300-320°C and holding for 45-60 min; an FID detector is used; an inert gas is used as the carrier gas; a split injection method is used with a split ratio of 8-12:1; wherein the related substances in pleroxafer include 1,4,8,11-tetraazacyclotetradecane. This invention achieves the detection of the related substance 1,4,8,11-tetraazacyclotetradecane in pleroxafer with high precision, specificity, accuracy, good repeatability, and good stability.

The application relates to the technical field of building material waterproofing, and particularly discloses a grouting type epoxy adhesive and a preparation method thereof. The grouting type epoxy adhesive comprises an A component and a B component which are separately stored and used in a weight ratio of (2.2-2.8):1; the A component contains the following raw materials in parts by weight: 70-80 parts of epoxy resin, 3-7 parts of carbon dodecyl to tetradecyl glycidyl ether and 15-25 parts of ortho-tolyl glycidyl ether; and the B component contains the following raw materials in parts by weight: 20-30 parts of polyether amine, 3-5 parts of N-aminoethylpiperazine and 0.5-1.5 parts of tri-(dimethylaminomethyl)phenol. The grouting type epoxy adhesive has good fluidity, high strength, high modulus and can adapt to complex construction environments of wet substrates.

This invention discloses a helical elongated cavity multi-walled mesoporous silica microparticle, its preparation method, and its application, relating to the field of materials preparation technology. The technical solution involves dissolving dimethylbis(tetradecyl)ammonium bromide in water, adding an alkaline solution, stirring thoroughly to obtain a mixed solution, then adding a silicate ester and stirring to react; the product is purified by centrifugation, washed with water, and ultrasonically treated in an acidic ethanol solution to obtain helical elongated cavity multi-walled mesoporous silica microparticles. The elongated cavities of this invention extend helically in the same plane, and the cavity walls have a concentric tubular multilayer structure, thus possessing a "multi-walled" structure; using doxorubicin as a model small molecule drug, these microparticles exhibit efficient loading and sustained-release capabilities.

The application belongs to the technical field of electric heating coating, and particularly relates to an electric heating coating with phase change and wave transmission, a coating, and a preparation method and application thereof. The electric heating coating with phase change and wave transmission comprises a polymer matrix, nano-conductive fillers, a phase change material, and an organic solvent; the phase change material comprises tetradecane. The electric heating coating with phase change and wave transmission adds the phase change material tetradecane, and the phase change and wave transmission electric heating coating material prepared by the coating can change its resistance value with temperature change, and then change the effect of transmitting electromagnetic waves, so as to realize the functions of low detectability and ice prevention and removal of a stealth warplane.