747 results about "Dodecane" patented technology

A task often encountered in very recent times is the rapid provision of prototypes. Particularly suitable processes are those based on pulverulent materials and in which the desired structures are produced layer-by-layer through selective melting and solidification. The invention provides the constitution, production and use of a copolyamide powder which was produced using the following monomer units: a) laurolactam or ω-aminoundecanoic acid, and also b) dodecanedioic acid, and either c) decanediamine or dodecanediamine, in shaping processes, and also to mouldings produced through a layer-by-layer process which selectively melts regions of a powder layer, using this specific powder. Once the regions previously melted layer-by-layer have been cooled and solidified, the moulding can be removed from the powder bed. The mouldless layer-by-layer processes for the production of components using the copolyamide powder result in simplified and more reliable conduct of the process and better recyclability.

The present invention relates to an antibody or antibody fragment that binds to 1,4,7,10-tetrazacyclododecane-N,N′,N″,N′″-tetraacetic acid (DOTA),which is bound to an alkyl-amino group through one of its pendant carb.oxyl groups.

The present invention provides a preparation method for a novel dendritic oligomeric quaternary ammonium surfactant. The method comprises the following steps: (1) N, N-dimethyl-1,3 - propanediamine and an excess amount of methyl acrylate are subjected to a Michael addition reaction to generate a compound (I); (2) the compound (I) and an excess amount of N, N-dimethyl-1 ,3 - propanediamine are subjected to an amidation reaction to obtain a compound (II); and (3) the compound (II) and bromododecane are subjected to a quaternization reaction to obtain the final product of a compound (III). The surfactant prepared by using the method of the invention has excellent performances, and can be widely used in fields such as daily chemicals, water treatment, paper making and oilfield development.

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 present invention relates to a polyamine-substituted ligand for the preparation of a contrast agent derived from a chelating molecule selected from the group consisting of 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid (DOTA) and diethylentriamine-pentaacetic acid (DTPA), wherein at least one of the carboxylic groups of the chelating molecule is reacted with an amine of formula HNR1R2 to form an amide bond, wherein R1, R2 are independently selected from the group consisting of H; (CH2)n—NR3R4; and R5; R3, R4 are independently selected from the group consisting of H; (CH2)m—NR6R7; and (CH2)m-1—CH3; R6, R7 are independently selected from the group consisting of H; and (CH2)o-1—CH3; n, m, o are independently 2, 3, or 4; R5 is of formula and optionally at least one of the carboxylic groups of the chelating molecule is further reacted with a monoalkylamine having 1 to 18 carbon atoms to form an amide bond; provided that at least one of R1, R2 is other than H. Furthermore, the invention relates to contrast agents for magnetic resonance imaging (MRI) comprising said ligands and in-vivo diagnostic methods based on MRI using said contrast agents.

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 method for preparing diesel components by catalytic hydrodeoxygenation of vegetable oil, which prepares high heat-value alkane by catalytic hydrodeoxygenation of the vegetable oil. The method comprises the following reaction steps: adding the vegetable oil, barium sulphate-loaded palladium serving as a catalyst, as well as a solvent selected from n-hexane, n-heptane, n-octane and dodecane to a reactor; supplying hydrogen; allowing reaction pressure to be between 1 and 10 MPa; stirring and heating at 230 to 320 DEG C; performing reaction for 3 to 12 hours and then stopping the reaction; allowing the catalyst and liquid products to automatically separate after the obtained product is cooled to room temperature; and obtaining the diesel components containing high heat-value alkane without centrifugation, filtration and other complicated post treatment. The method has the advantages of simple preparation process, low reaction temperature, low solvent consumption, no cracking of carbon chain parts of the oil, high combustion heat value of target products and recyclable catalyst.

A surface treated particle comprising a plurality of inorganic, metallic, semi-metallic, and / or metallic oxide particles and a star-graft copolymer with looped and / or linear polymeric structure on a star-graft copolymer, obtainable by a heterogeneous polymerization reaction in the particle surface proximity, encapsulating at least a portion of said particles and a method for making the same. The surface treatment comprises: Si (w, x, y, z), where: w, x, y, and z are mole percent tetrafunctional, trifunctional, difunctional, and monofunctional monomeric units, respectively; w, x, y, and z are about 0-50, 0-50, 5-99, and 0-5, respectively; w is tetraethylorthosilicate; x is selected from the group consisting of γ-glycidoxypropyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, methyltrimethoxysilane, n-propyltrimethoxysilane, isobutyltrimethoxysilane, n-hexyltrimethoxysilane, n-octyltrimethoxysilane, n-octadecyltrimethoxysilane, phenyltrimethoxysilane, 3-(trimethoxysilyl)propylsuccinic anhydride, heptadecafluorotrimethoxysilane, 3-isocyanatopropyltrimethoxysilane, 2-(diphenylphosphino)ethyltrimethoxysilane, 3-aminopropyltrimethoxysilane, 3-mercaptopropyltrimethoxysilane, n-(trimethoxysilylpropyl)EDTA, pentafluorophenylpropyltrimethoxysilane, trifluoropropyltrimethoxysilane, and the triethoxy-containing counterparts of these monomers; y is selected from the group consisting of dicyclohexyldimethoxysilane, diethyldiethoxysilane, dimethyldichlorosilane, dimethyldiethoxysilane, dimethyldimethoxysilane, diphenyldiethoxysilane, diphenyldimethoxysilane, di-n-hexyldichlorosilane, n-hexylmethyldichlorosilane, methyldodecyldiethoxysilane, n-octylmethyldimethoxysilane, and the diethoxy-containing counterparts of these monomers; and z is selected form the group consisting of n-octadecyldimethylmethoxysilane, triethylsilanol, trimethylethoxysilane, trimethylmethoxysilane, and the ethoxy-containing counterparts of these monomers. Product(s) per se, defined as surface treated ZnO and / or TiO2, and the use of the product(s) per se in personal care formulations are excluded.

The invention provides an ammonium benzoate gas-phase slow-release rust preventive oil which is prepared from the following raw materials by weight: 150 parts of No. 120 solvent naphtha, 5 to 8 parts of rosin, 2 to 5 parts of zinc dust, 3 to 5 parts of sodium laureth sulfate, 15 to 18 parts of liquid paraffin, 3 to 5 parts of 3-aminopropyltrimethoxysilane, 10 to 15 parts of triethylenediamine, 10 to 13 parts of epoxidized soybean oil, 10 to 15 parts of xylene, 5 to 8 parts of a cross-linking agent TAIC, 1 to 3 parts of ferrocene, 4 to 6 parts of polyisobutylene, 1 to 2 parts of ammonium benzoate, 1 to 2 parts of benzotriazol, 1 to 2 parts of 2-aminoethyl-heptadecenyl-imidazoline, 1 to 2 parts of triethanolamine, 2 to 4 parts of zinc dialkyl dithiophosphate, 1 to 2 parts of sodium dodecyl benzene sulfonate, 6 to 8 parts of dimethicone, 10 to 12 parts of epoxidized triglyceride, 5 to 6 parts of a film forming resin and 1 to 2 parts of modified attapulgite. The gas-phase rust preventive oil has good antirust performance and an excellent contact antirust effect, so the rust preventive oil can be widely applicable to antirust action on inner cavities or other contact or non-contact metal positions of mechanical equipment.

The invention relates to a non-cyanide silvering brightener and a plating solution thereof. The non-cyanide silvering brightener uses water as solvent and comprises the following main components: 10-20g / L of sodium dodecyldibenzenesulphonate, 15-30g / L of beta-naphthol ethoxylate, 0.8-2g / L of hydroxyethyl ethylenediamine triacetic acid (HEDTA), 0.5-3g / L of potassium dihydrogen phosphate, 5-15g / L of urea, 3-18g / L of polyethylene glycol, 40-80g / L of sulfur-containing heterocyclic compound and 5-15g / L of nitrogen-containing carboxylic acid. The brightener of the invention does not contain cyanide, the mirror surface of the coating is bright, the same effect of cyanide-containing silvering can be realized; the performance tests of the coating show that the color of the coating obtained by using the non-cyanide bright silvering plating solution of the invention is difficult to change, and the coating has low brittleness and good adhesive force and can meet the requirements on coating in different application aspects.

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 compound type temperature-resisting viscoelastic self-diverting acid as well as a preparation method and application thereof. The self-diverting acid is prepared from 1.0 to 7.5 weight percent of thickening agent A, 1.0 to 7.5 weight percent of thickening agent B, 32.2 to 75.5 weight percent of concentrated hydrochloric acid, 1.0 to 4.0 weight percent of corrosion inhibitor, 1.5 to 5.0 weight percent of ferric ion stabilizer, 1.5 to 4.0 weight percent of clay stabilizer and the balance of water; the thickening agent A is prepared from one or more of cocamidopropyl betaine, octadecyl dimethyl hydroxypropyl betaine and lauramidopropyl betaine; the thickening agent B is prepared from one or more of erucamide propyl betaine, docosyl dimethyl betaine and erucamide propylsulfobetaine. The self-diverting acid disclosed by the invention is suitable for a carbonate reservoir with the temperature of 80 to 120 DEG C.

The invention discloses a high-temperature-resistant nanocomposite filtrate loss reducer for drilling fluid and a preparation method thereof. The filtrate loss reducer is prepared by taking styrene, amide, acrylic acid, azodiisobutyronitrile, olefin sulfonate and nano SiO2 as raw materials and taking an oil phase solution as a continuous phase through reacting under the fine emulsion ultrasonic action of an emulsifier sodium dodecyl sulfate so as to generate a copolymer. The resisted temperature of the filtrate loss reducer can reach 220 DEG C, and the filtrate loss reducer is good in calcium resistance and salt resistance; the filtrate loss reducer is simple and feasible in preparation method, mild and controllable in reaction conditions, high in grafting efficiency, high in reaction speed, and low in cost.

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 PtxCu100-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.

This invention improves the PAMPA (parallel artificial membrane permeability assay) method used in pharmaceutical, biotechnological, and agrochemical R&D. This new high-throughput method and apparatus for measurement of permeability and membrane retention of compounds overcomes shortcomings of prior art and includes sensitivity and speed enhancing reagents. The phospholipid membranes used here consist of 10–74% wt / vol soybean lecithin extract dissolved in dodecane. Concentrations are measured by direct UV spectroscopy. To reduce membrane retention, surfactants, cyclodextrins, or water-soluble lipophilic polymers with low UV absorption are used in the acceptor comparment of the permeation cells and create an artificial sink state. A pH gradient established between donor and acceptor solutions creates a secondary sink state. This “double-sink” makes successful modeling of passive-diffusion transport of molecules possible. By accelerating transport of certain molecules, it shortens measurement time and increases assay throughput. A new permeability equation accounts for the “double-sink” condition as well as membrane retention.

An unreinforced, halogen-free polyamide moulding composition which is provided with flame retardants and from which it is possible to produce electric and / or electronic components which can be reliably soldered, i.e. in particular without blisters being formed in the soldering process, in particular at 260° C. and possibly higher temperatures after water absorption and in the case of critical designs of the components, and which have an elongation at break of at least 5% and reliably achieve the UL94 classification V0. These polyamide moulding compositions have the following composition: (A) 62-87% by weight of a partially aromatic, partially crystalline copolyamide having a melting point of 270° C. to 320° C. and made up of 100% by weight of diacid fraction composed of: 50-100% by weight of terephthalic acid (TPA) and / or naphthalenedicarboxylic acid; 0-50% by weight of isophthalic acid (IPA), and 100% by weight of diamine fraction composed of at least one diamine selected from the group consisting of: butanediamine, pentanediamine, hexanediamine, octanediamine, methyloctanediamine, nonanediamine, decanediamine, undecanediamine and dodecanediamine; (B) 5-15% by weight of ionomer; (C) 8-18% by weight of flame retardants; (D) 0-5% by weight of additives; where the components (A)-(D) add up to 100% by weight.

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 which is a specific sulfonium salt compound. The resin (A) is a polymer comprising tertiary alkyl protective group units having a hydrophobic tetracyclo[4.4.0.12,5.17,10]dodecane structure, di- or trihydroxyadamantyl units, and monocyclic lactone units.

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[4.4.0.12,5.17,10]-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.