41 results about "Tetradecyltrimethylammonium bromide" patented technology

The invention provides hydrotalcite-loaded nanometer platinum catalyst as well as a preparation method and application thereof. The preparation method of the hydrotalcite-loaded nanometer platinum catalyst comprises the following steps of: preparing magnesium-aluminum hydrotalcite crystal nucleus by utilizing an all-return liquid mixing membrane reactor, dispersing the crystal nucleus in an aqueous solution; adding an chloroplatinic acid aqueous solution and tetradecyl trimethyl ammonium bromide (TTAB) as well as a proper proportion reducing agent of NaBH4; controlling the reducing velocity and the growth of Pt nanometer particles by utilizing the protecting and stabilizing effect of the TTAB to the Pt<4+> ion; and gradually crystallizing the hydrotalcite while reducing the Pt<4+> ion to obtain the hydrotalcite-loaded nanometer platinum catalyst. The catalyst is obtained by loading nanometer particles on a hydrotalcite carrier, wherein the chemical formula of the hydrotalcite is as follows: MgxAly(OH)16CO3 nH2O; the platinum nanometer particle dimension is 2 nm-8nm; the nanometer particles are polyhedral or ellipsoidal in appearance; the loading capacity of the platinum is 0.5%-3%; and the dispersion degree on the carrier is 20%-50%. The hydrotalcite-loaded nanometer platinum catalyst can be used for catalytic hydrogenation reaction of unsaturated aldehyde (cinnamyl aldehyde), wherein water is used as solvent, the conversation rate of the reactant cinnamyl aldehyde is 75%-95% and the selectivity of the product cinnamyl alcohol is 75%-95%.

The invention discloses a nanoparticle enhanced low-interfacial-tension foam system and a preparation method thereof. The foam system comprises the following components by weight percent: 0.2-0.8% ofa cationic surface active agent, 0.01-0.1% of a stabilizer, 0.5-1.0% of a polymerization inhibitor, 0.3-1.0% of an additive and the balance of mineralized water, wherein the cationic surface active agent is selected from dodecyl trimethyl ammonium bromide, tetradecyl trimethyl ammonium bromide, hexadecyl trimethyl ammonium bromide and stearyl trimethyl ammonium bromide; the stabilizer is selectedfrom modified nano-SiO2, modified nano-MgO and modified nano-TiO2; the polymerization inhibitor is sodium citrate; the additive is selected from ethylene glycol and dodecanol; the mineralized water isa mixed water solution of sodium chloride, anhydrous calcium chloride and anhydrous magnesium sulfate. The nanoparticle enhanced low-interfacial-tension foam system is good in foaming performance andfoam stabilizing performance, high in interfacial activity, cheap and easily accessible in raw material, simple in preparation method and excellent in foam combination performance.

The invention relates to an aqueous coating composition of nano cellulose (e.g., microfibrillated cellulose), characterized in that has a dry matter concentration of 2%-12% of nano cellulose and comprises at least one cationic surfactant, which may be chosen among Hexadecyltrimethyl-ammonium bromide, Octadecyltrimethyl-ammonium bromide, Hexadecylpyridinium chloride and Tetradecyl trimethyl-ammonium bromide, Dodecyl pyridinium chloride. The invention also pertains to use of the composition as a coating layer and as an oxygen barrier layer. Further it relates to substrates, e.g., board, cardboard or paper coated with the composition. Moreover, the invention pertains to a process for preparing the coating composition.

The invention discloses an early-strength high-performance polycarboxylic acid water reducer and a preparation method thereof. The early-strength high-performance polycarboxylic acid water reducer is prepared from the following raw materials in parts by weight: 100 parts of polycarboxylic acid water reducer, 10-15 parts of a retarder, 12-16 parts of a diethanolisopropanolamine maleate compound, 8-10 parts of diethanolisopropanolamine, 8-12 parts of sodium lignosulfonate, 3-5 parts of 2-ethyl-4-methylimidazol, 0.5-1.5 parts of tetradecyl trimethyl ammonium bromide, 10-20 parts of sodium metasilicate pentahydrate, and 250-450 parts of water. The early-strength high-performance polycarboxylic acid water reducer prepared by the method disclosed by the invention has excellent properties of low applicable temperature, good compatibility among components, no chloride ions, low shrinkage ratio, high water-reducing rate, good slump retaining effect, and low mixing amount.

A wood preservative composition for treating wood to impart biocide and antimicrobial characteristics to wood contains a mixture of one or more cleaning members containing quaternary salts, an aromatic quaternary salt, a copper sulfate, a glycol ether and a chelator, mixed with water. The preferred active members are tetradecyltrimethylammonium bromide, tetrasodium ethylenediaminetetraacetic acid, benzethonium hydrochloride, copper sulfate pentahydrate and 2-butoxyethanol. The chelator is tetrasodium salt ethylenediamine of tetraacetic acid (EDTA).

The invention relates to a preparation method of a viscoelastic surfactant solution which contains a trimeric anionic surfactant component and is obtained by compounding of anionic and cationic surfactants. The structural of the main component, an anionic surfactant, is as shown in the specification. The cationic surfactant can be any one of dodecyltrimethylammonium bromide (DTAB), tetradecyltrimethylammonium bromide (TTAB) or cetyltrimethylammonium bromide (CTAB). The longer the hydrophobic chain length of the cationic surfactant is, the more excellent the effect of the viscoelastic solution formed by the cationic surfactant and the trimeric anionic surfactant is. Preparation of the surfactant solution comprises two main processes, namely synthesis and compounding of trimeric surfactants. The compounded surfactant solution at low concentration shows the main characteristic of elasticity. The solution can be gel-like and can be applied in the formula of an oilfield fracturing fluid, a drag reducer and a daily cleaning agent.

The production process of hemolytic agent for hemocyte analyzer includes the following steps: water processing via filtering in high pressure reverse osmosis membrane and ion exchange with resin to obtain water with resistivity greater than 10 megaohm/cm, adding and dissolving ammonium dodecyl trimethyl chloride under stirring and cooling to 15-30 deg.c, adding ammonium tetradecyl trimethyl bride, adding potassium cyanide and other material, sterilizing, filtering and packing. The hemolytic agent has high quality and long storing life up to 2 years.

The invention discloses a method for synthesizing MCM-48 mesoporous silica. The method utilizes tetradecyl trimethyl ammonium bromide (C14TAB) and 2-hydroxyl-3-naphthoic acid (NaHN) as template agents and sodium silicate (Na2SiO3.9H2O) as a silicon source. The method comprises the following synthesizing steps: completely dissolving C14TAB into water and then adding NaHN; additionally taking Na2SiO3.9H2O to be completely dissolved into water; then quickly mixing two kinds of solution, stirring for 20 minutes in room temperature and then adding 2mol/L sulfuric acid drop by drop; transferring a mixture into 100 DEG C water in a high-pressure kettle, heating for 48 hours, filtering, washing and putting in air to be dried; then roasting for 6 hours in a 560 DEG C muffle furnace to remove organic matter to obtain a product. Raw material ratio of C14TAB/NaHN/Na2SiO3.9H2O/H2SO4/H2O is 1 : (0.15 to 0.27) : 30 : 30 : 900. The raw materials of the C14TAB, the NaHN and the Na2SiO3.9H2O utilized by the method disclosed by the invention are easy to obtain, so that production cost is greatly reduced. A fluorine-containing additive is avoided in a production process, so that environmental friendliness is achieved, a product is high in order degree and uniform in pore diameter, and large-scale industrial production is facilitated.

The invention belongs to the technical field of plastic, and particularly relates to environment-friendly antibacterial ABS plastic and a preparation method thereof.The environment-friendly antibacterial ABS plastic comprises an ABS plastic layer, the upper surface of the ABS plastic layer is covered with a second protective layer, and the upper surface of the second protective layer is covered with a first protective layer; the ABS plastic layer is prepared from the following components in parts by weight: 75-80 parts of regenerated ABS particles, 30-45 parts of organic silicon rubber, 25-40 parts of polylactic acid, 15-25 parts of modified montmorillonite, 6-10 parts of a composite antibacterial agent, 3-8 parts of a heat-resistant agent, 3-6 parts of a dispersing agent, 2-4 parts of a silane coupling agent, 2-3 parts of an antioxidant and 1-3 parts of a plasticizer; by using hectorite/tetradecyl trimethyl ammonium bromide/chitosan as the composite antibacterial agent, the antibacterial effect is remarkable, the sterilization speed is high, the antibacterial spectrum is wide, the safety is high, the performance stability is good, and the service life is long.

The invention discloses a preparation method of ion-pair chromatographic-grade tetradecyl trimethyl ammonium bromide. The preparation technology is characterized by comprising the steps that a tetradecyl trimethyl ammonium bromide raw material is put into a solvent, heating is conducted to 55-60 DEG C, stirring is conducted for 1h or longer, and heating is stopped; under the stirring condition, pretreated activated carbon is added to the obtained solution in batch, heating reflux is conducted, sufficient stirring is conducted for 3-8 h, heating is stopped, pressure reduction and suction filtration are conducted, a filtrate is cooled to the room temperature and transferred to a crystallizer, and standing and crystallization are conducted; separated white crystals are filtered and separated,a filter cake is press-dried, the crystals are collected, drying is conducted, and the ion-pair chromatographic-grade tetradecyl trimethyl ammonium bromide is obtained and subjected to sealing packaging under nitrogen protection. The method is easy, convenient and quick to operate and efficient.

The invention relates-the field of refractory materials, and discloses a high-strength fireproof crucible and a production method thereof. The crucible is produced from a mud material and additives; the mud material comprises 55-65 parts of magnesium ores, 5-15 parts of zirconia, 5-15 parts of fused magnesia, 5-15 parts of waste graphite micro-powder, 1-5 parts of metallic magnesium micro-powder,1-5 parts of chromium oxide micro-powder, 0.3-0.5 part of resorcinol diglycidyl ether, 0.1-0.3 part of sodium dodecyl benzene sulfonate, 20-30 parts of ethanol and 10-20 parts of water; and the additives include 0.05-0.1 part of a cationic photocuring initiator, 0.05-0.2 part of tetradecyltrimethylammonium bromide, 3-7 parts of ethanol and 3-7 parts of water. The reduction of the use amount of theadditives effectively increases the strength of the crucible. A crucible blank is pre-cured through a photocuring technology before being sintered in order to effectively prevent the cracking of thecrucible.

The invention discloses methanol diesel fuel, prepared from the following components in terms of parts by weight: 680 to 730 parts of diesel fuel, 140 to 160 parts of methanol, 25 to 30 parts of diethoxymethane, 6 to 8 parts of dimethylacetamide, 10 to 12 parts of secondary alcohol ethoxylate, 13 to 15 parts of caprylic capric triglyceride, 12 to 15 parts of myristyltrimethylammonium bromide, 30 to 50 parts of propylene glycol monomethyl ether, 3 to 4 parts of sec-butyl acetate, 12 to 15 parts of coconut oil amine polyoxyethylene ether, 15 to 18 parts of propargyl alcohol and 4 to 5 parts of nano-magnesium hydroxide. The methanol diesel fuel disclosed by the invention has the features of homogeneous phase, transparency, stable property and long storage period, and can be widely applied to vehicles, boilers, ships and the like. The methanol diesel fuel disclosed by the invention has the advantages that the effects of obvious energy saving, obvious environmental friendliness and excellent combustion performance are achieved; especially compared with conventional #0 diesel fuel, the maximum firing pressure in an cylinder is increased, the combustion timing is delayed, the peak value of heat releasing rate is increased, and the PM (Particulate Matter) emission is obviously reduced at the same time.

The invention discloses high heat dissipation mobile phone charger casings. The high heat dissipation mobile phone charger casings comprise the following raw materials in parts by weight: 80-100 partsof polyvinyl chloride, 20-30 parts of ethylene propylene diene monomer, 1-2 parts of acetyl tributyl citrate, 2.5-4.5 parts of compatibilizer, 2-4 parts of dibenzoyl peroxide, 0.4-0.8 part of dimethylbenzylamine , 45-55 parts of filler, 1.5-2.5 parts of antioxidant and 2-3 parts of light stabilizer, wherein the compatibilizer comprises, by weight, 10-14 parts of clay compound, 6-12 parts of sepiolite powder, 8-16 parts of rectorite powder, 4-8 parts of hollow glass microspheres, 3-6 parts of potassium titanate whisker and 3-6 parts of calcite powder; and the clay compound is prepared by usingthe following process: heating phospholipid and acetic acid with stirring, adding hydrogen peroxide with stirring, performing cooling, adjusting the system to be neutral, then adding clay, tetradecyltrimethylammonium bromide, silane coupling agent and water, heating the mixture to reflux with stirring, performing filtration, performing washing, and drying the filter cake to a constant weight to obtain the clay compound.

The invention relates to the field of refractory materials, and discloses a high-density refractory ceramic fiber and a preparation method thereof. The ceramic fiber is prepared by mixing an A ceramicslurry and a B ceramic slurry, wherein the A ceramic slurry comprises electrofused chromium oxide, zirconia, alumina micro powder, yttrium oxide micro powder, lanthanum and/or lanthanide metal oxidemicro powder, metal yttrium micro powder, tetradecyl trimethyl ammonium bromide, ethanol and water; and the B ceramic slurry comprises electrofused chromium oxide, zirconia, alumina micro powder, yttrium oxide micro powder, lanthanum and/or lanthanide metal oxide micro powder, metal yttrium micro powder, sodium dodecyl benzene sulfonate, binding agent, ethanol and water. According to the high-density refractory ceramic fiber, the using amount of the binding agent is greatly reduced, and the density of the ceramic fiber is effectively increased, therefore, the ceramic fiber has a higher strength.

The invention discloses a pH control type viscoelastic solution constructed by compounding anion/cation surfactants and its preparation method and application: the viscoelastic solution system is prepared by compounding anion and cation surfactants, wherein the anion surfactant is horse Any one of sodium lepimarate dodecimide, sodium maleopimarate tetradecimide, and sodium maleopimarate hexadecanimide, and the cationic surfactant is dodecyltrimethyl Any one of trimethylammonium bromide (DTAB), tetradecyltrimethylammonium bromide (TTAB), and cetyltrimethylammonium bromide (CTAB). The viscoelasticity of the system can be controlled within the pH range of 1.7~14, which has the characteristics of a gel, and the zero-shear viscosity of the viscoelastic solution can reach 295.2 Pa·s. The invention also discloses the application of the viscoelastic solution in single-layer carbon nanotube (SWNT), and the prepared SWNT dispersion liquid has good uniformity and long stable time.

The invention discloses a thermal insulation material for buildings. The composite material is prepared from the following raw materials in parts by weight: 9-15 parts of montmorillonite, 3-7 parts ofa hydrochloric acid solution, 3-10 parts of a silane coupling agent, 0.5-1.5 parts of tetradecyl trimethyl ammonium bromide, 12-22 parts of polyvinyl chloride, 6-13 parts of a titanate coupling agent, 2-8 parts of silk fibers, 7-15 parts of modified polyurethane, 6-13 parts of natural rubber, 0.5-2 part of montan wax, 10-15 parts of a Ca/Zn composite stabilizer, 4-10 parts of gamma-aminopropyltriethoxysilane, 1-3 parts of polyethylene wax, 5-9 parts of zinc stearate, 1-2 parts of 2-mercaptoethyltriethoxysilane, 0.3-0.7 part of 3-sulfopropyl hexadecyl dimethyl ammonium, 8-17 parts of perlite,30-50 parts of diatomite and 15-30 parts of bentonite. The scheme has good heat preservation and heat insulation effects, further improves the formaldehyde adsorption effect of the heat insulation material on the basis of ensuring the heat insulation and heat preservation effects, has the properties of freezing resistance, heat resistance, wear resistance, thermo-oxidative aging resistance and thelike, effectively improves the adaptive capacity to the environment, and ensures the normal service life of the thermal insulation material for the building.

The invention discloses a method for removing pollutants in water by micro-electrolysis enhanced flotation. The method comprises the following steps: an iron-manganese-carbon material is used as a micro-electrolysis raw material and a phase-state adjusting agent, a filling flotation column is used as a separation reactor, the micro-electrolysis raw material is filled in the flotation column, pollutant-containing water is introduced into the flotation column, after a reaction is performed for a period of time, a surfactant is added into the flotation column for enhanced flotation separation ofthe pollutants in the water, wherein the iron-manganese-carbon material comprises the following components, in parts by mass: 80-90 parts of iron powder, 8-15 parts of manganese powder, 2-5 parts of carbon powder, 15-20 parts of bentonite and 3-5 parts of ammonium bicarbonate; and the surfactant comprises the following components, in parts by mass: 20-40 parts of tetradecyl trimethyl ammonium bromide, 30-35 parts of single-chain N-alkylbenzimidazole, 10-15 parts of carboxylic acid type imidazoline phosphate, 5-10 parts of humic acid, and 15-20 parts of alginic acid. The method provided by theinvention can effectively remove organic and inorganic pollutants in the water at the same time, and has engineering application value.