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%.

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 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 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 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.