737 results about "Dodecane" patented technology

The present invention provides novel liposomes comprising Gd.DOTA.DSA (gadolinium(III)2-{4,7-bis-carboxymethyl-10-[(N,N-distearylamidomethyl-N′-amido-methyl]-1,4,7,10-tetra-azacyclododec-1-yl}-acetic acid), characterised in that said liposome further comprises a neutral, fully saturated phospholipid component (e.g. DSPC (1,2-distearoyl-sn-glycero-3-phosphocholine]), which are of particular use in the preparation of magnetic resonance contrast agents for enhancing a magnetic resonance image of tumours in a mammal.

The invention discloses an amination catalyst and a preparation method thereof, which aims to solve the problem that the amination catalyst is not high in activity and selectivity. The compositions in weight percentage of the amination catalyst are: 15 to 25 percent of A, 5 to 10 percent of B, 1 to 3 percent of C, 0.1 to 1.5 percent of D, and the balance being h-type mordenite, wherein the A is alumina; the B is titanium oxide; the C is metallic ion W<6+>, Re<7+> or Bi<3+>; the D is metallic ion Cs<+>; and the metals exist in the form of elements or oxides. The preparation method comprises the following steps of loading the components C and D on the h-type mordenite, well mixing the components C and D with the alumina and ethanolamine titanate dodecane alcohol ester, molding, roasting and activating the mixture. The catalyst is used for synthesizing ethylene dimine under the conditions of ethanolamine and ammonia phase.

The invention provides a purpose of modified hydrotalcite based on dodecyl benzene sulfonate and lauryl sulfate, and particularly relates to an adsorbing agent used for adsorbing 2, 4, 6-trichlorophenol in a wastewater solution. According to modified hydrotalcite, with sodium dodecyl benzene sulfonate (SDBS) and sodium dodecyl sulfate (SDS) as a modifying agent, modified Zn2Al-LDHs is prepared and obtained by a co-precipitation method, the adsorbing agent has larger laminated plate spacing compared with the adsorbing agent before modification, and the hydrophilic surface becomes hydrophobic after modified. The adsorbing agent adsorbs 2, 4, 6-trichlorophenol and reaches adsorbing balance after 2-3 hours under the conditions that the pH value is 3-5 and the temperature is 25-35 DEG C; the adsorbing capacity reaches 100-160mg/g, and the adsorption rate reaches 70-83%. The adsorbing agent is applicable to 30-300mg/L wastewater solution containing 2, 4, 6-trichlorophenol and has the characteristics that the price is low, the adsorbing capacity is large and the adsorbing process is simple and convenient and is easy to operate and the like.

The invention relates to a method for producing 1,2-dodeca-2,10-diene diacid and 1,12-dodecanoic acid whereby cyclooctene and acrylic acid are reacted with a ruthenium catalyst by way of a metathesis reaction at high substrate concentrations until the reaction takes place in substance, the resulting unsaturated dicarboxylic acid being precipitated and being hydrated in a second reaction step.

A bactericide for sewage treatment contains isothiazolinone, dodecyl dimethyl benzyl and citric acid. It has better water quality and is non-toxic. It can be used for long time storage.

The invention relates to a purifying process of DOTA. The process comprises the following steps: crystallizing DOTA.2HCl with a mixture of water and ethanol at a low temperature twice to remove an impurity NaCl to obtain refined DOTA.2HCl; and processing the refined DOTA.2HCl with a highly acidic cation or highly basic anion exchange resin to obtain high purity DOTA. The purifying process of the DOTA of the invention has the advantages of simplicity, easy implementation, economy and practicality, and is suitable for industrialized production.

High-quality bimetallic Pt_xCu_100-x (x=54-80 at. %) nanocubes can be prepared from a hot organic solution. Synthetic conditions, such as the ratio of oleylamine/tetraoctylammonium bromide as well as the doses of 1-dodecanethiol and 1,2-tetradecanediol have been optimized to ensure a formation of Pt—Cu nanocubes. Electrochemical evaluation shows that the catalytic activity of Pt₆₀Cu₄₀ nanocubes for methanol oxidation is superior, in comparison with those of spherical Pt₆₀Cu₄₀ nanocubes and Pt nanocubes with similar sizes, implying that the {100}-terminated Pt₆₀Cu₄₀ nanocubes offer a higher activity for methanol oxidation reaction than those with mixed crystallographic facets do. As another example, it was identified that Pt₈₀Cu₂₀ nanocubes is the best electrocatalyst on the basis of the maintainable electrocatalytic activity (which is even slightly superior to that of pure Pt nanocubes) and remarkable long-term stability (˜300 hours vs 3 hours for Pt nanocubes) when being performed towards formic acid oxidation reaction.

The invention discloses outdoor ultrathin fireproof coating. The outdoor ultrathin fireproof coating comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 15:(5-1); the component A comprises, by weight, 10-15 parts of molybdenum sesquioxide, 15-30 parts of epoxy terminated polyether amine, 0.5-3 parts of polyoxyethylene polyoxypropylene ether, 5-10 parts of 1, 12-dibromo dodecane, 1-10 parts of KH-560, 1-5 parts of graphene oxide, 30-50 parts of tetraethyl orthosilicate and 10-20 parts of dimethyl sulfoxide; the component B comprises, by weight, 5-10 parts of beta-cyclodextrin modified amino terminated sulfonated polybenzimidazole, 15-20 parts of quartz powder, 1-10 parts of KH-550, 1-5 parts of N, N-dimethyl piperazine, 5-10 parts of ethylene glycol and 1-10 parts of pentaerythritol.

The invention relates to an automobile exhaust PM2.5 pollutant treatment agent added in fuel oil. The formula of the treatment agent comprises the following components by weight percent: 10%-30% of methanol, 0.03%-0.07% of ferrocene, 13%-16% of butanol, 0.5%-0.8% of nanometer lanthanum oxide, 0.6-0.9% of nanometer cerium oxide, 0.05%-0.08% of potassium permanganate, 13%-15% of methyl isopropyl ether, 0.1%-0.5% of aluminum acetylacetonate, 12%-18% of dodecyl alkenyl succinic acid, 1%-3% of urea, 5%-10% of isopropanol, 1%-5% of multi-alkenyl succinimide, 0.02%-0.05% of manganese dioxide and 10%-30% of ethanol. The treatment agent is prepared through simple processes such as mixing, stirring, precipitating and filtering. The automobile exhaust PM2.5 pollutant treatment agent is non-toxic, has no bad smell, does not corrode the equipment and can be used to increase the power of the engine and greatly reduce the emission of PM2.5 in the exhaust; and after 10-20g of the automobile exhaust PM2.5 pollutant treatment agent added in fuel oil is added in 1L of oil and the engine runs for 10min, the effect can be realized and the PM2.5 concentration of the exhaust discharged by the kerosene internal combustion engine can be reduced from 330mg/m<3> to 60mg/m<3>.

A positive resist composition comprises (A) a resin component which becomes soluble in an alkaline developer under the action of an acid, and (B) an acid generator. The resin (A) is a polymer comprising tertiary alkyl protective group units having a hydrophobic tetracyclo[4.4.0.1^2,5.1^7,10]-dodecane structure, hydroxyadamantane units, monocyclic lactone units, and carboxylic acid units. The acid generator (B) is a specific sulfonium salt compound.

The invention discloses a preparation method of a hollow porous microsphere adsorbent and belongs to the technical field of environment-friendly functional material preparation. ZIF-8 nanoparticles are used as stable particles of a Pickering emulsion and are dispersed into a solution so as to be used as a water phase. Dodecane is used as an oil-phase solvent, and crosslinking agents azodiisobutyronitrile, styrene and vinyl benzene are mixed to be used as an oil phase. The water phase and the oil phase are mixed to form a stable Pickering emulsion. The hollow porous microsphere adsorbent is prepared by carrying out a thermal initiation reaction and is applied to the adsorption and separation of amoxicillin in a water solution. The product has large specific surface area and good stability and is beneficial to the adsorption of target molecules, porous ZIF-8 attached to the outer parts of the hollow microspheres provides a great number adsorption sites for the material, and the ZIF-8 nanoparticles stably attached to the hollow microspheres are more conveniently recycled as comparison with ZIF-8 particles in discrete distribution.

The invention relates to a nuclear magnetic resonance imaging contrast agent, in particular to a method of high-flexibility nuclear magnetic resonance imaging contrast agents based on high molecular nanometer particles prepared through fine emulsion polymenrization. The nuclear magnetic resonance imaging contrast agents are prepared from the composition of 1, 4, 7, 10-tetrazo heterocycle dodecane with long-chain alkane and gadolinium (Gd-DOTA for short) or the composition of diethylenetriamine pentaacetic acid and gadolinium (Gd-DTPA for short) for carrying out fine emulsion polymenrization preparation with high molecular monomers. The Gd-DOTA derivatives (Gd-DOTA derivatives for short) with the long-chain alkane and the Gd-DTPA derivatives (Gd- DTPA derivatives for short) with the long-chain alkane respectively have the structures as the first formula and the second formula, wherein the value of n is between 8 and 24.

The semiaromatic polyamide of the present invention includes a terephthalic acid component and a diamine component, wherein the diamine component is any of 1,8-octanediamine, 1,10-decanediamine and 1,12-dodecanediamine, and the proportion of the triamine unit in relation to the diamine unit in the polyamide is 0.3 mol % or less.

A thermally foamable microsphere having a structure that a foaming agent is encapsulated in an outer shell formed from a polymer, wherein the foaming agent contains isododecane, and a production process of the thermally foamable microsphere by a suspension polymerization process using a polymerizable monomer and a foaming agent containing dodecane.

The invention provides a paramagnetic metal complex and a synthetic method and application thereof. The paramagnetic metal complex is an arabinogalactan-modified 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacethyl paramagnetic metal complex. A magnetic resonance imaging contrast agent prepared from the paramagnetic metal complex has high stability, water solubility and relaxation rate and is targeted to liver and kidney, so that targeted imaging is realized, and the imaging contrast and definition are improved. The paramagnetic metal complex has a good effect on raising the early diagnosis levels of diseases of liver and kidney organs, is about 2 times the relaxation rate of dotarem, has very long targeted radiography imaging time, can be easily prepared into a solution with required concentration for intravenous injection, is suitable for sterilizing and disinfecting with a hot pressing method, can be selectively identified by an asialoglycoprotein receptor on a liver parenchyma surface, and has high selectivity on livers of human beings or other mammals.

The invention provides a method for synthesizing dodecyl methyl dihydroxyethyl ammonium bromide by microwave. The method comprises the following steps: dissolving N-methyl diethano lamine and dodecyl bromide in normal butanol with the volume times of between 1.5 and 3; refluxing the mixed solution for 17 to 23 minutes in microwave with the power of between 500 and 700W; and adding absolute ether in the reaction solution after the reaction is completed to cause the product to be crystallized, thereby obtaining white solid. In the process of refluxing reaction, continuous action of the microwave and boiling of the reaction solution are maintained all along. By the prior method, the rate of conversion of the target product of the method is equivalent to that of the prior method, or even improved, but the reaction time required by the method is only about 5 percent of that of the prior method.

The invention relates to the oil field oil extraction field and particularly relates to a low-concentration and efficient composite oil displacement composition. The composition contains the followingcomponents: sodium lauryl sulfate, N-dodecyl N methylpyrrolidinium bromide and partially hydrolyzed polyacrylamide. The composition contains simple components, and a surfactant oil replacement groupis formed by an anionic surfactant, a cationic surfactant or an additional nonionic surfactant and a cosurfactant, so that the taboo that the anionic surfactant and the cationic surfactant are hardlysimultaneously used is broken through; and the surfactant oil replacement group is further combined with oil replacement components of the composition, and the advantages of surfactant oil replacementand polymer oil replacement are adequately utilized, so that the oil extraction efficiency is comprehensively improved. Compared with common oil displacement composition products, the low-concentration and efficient composite oil displacement composition has the advantages that the use amount is fewer when an oil replacement solution is formed, the oil extraction can be remarkably lowered, the huge economic benefit can be created, and the composition has a potential market value.