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205 results about "Cetylpyridinium chloride" patented technology

Cetyl-pyridinium chloride (CPC) is a cationic quaternary ammonium compound used in some types of mouthwashes, toothpastes, lozenges, throat sprays, breath sprays, and nasal sprays. It is an antiseptic that kills bacteria and other microorganisms. It has been shown to be effective in preventing dental plaque and reducing gingivitis. It has also been used as an ingredient in certain pesticides. Though one study seems to indicate cetylpyridinium chloride does not cause brown tooth stains, at least one mouthwash containing CPC as an active ingredient bears the warning label "In some cases, antimicrobial rinses may cause surface staining to teeth," following a class-action lawsuit brought by customers whose teeth were stained.

Surface active agent assisting alcohol-hydrothermal method for preparing anthoid BiVO4

The invention discloses an alcohol-hydrothermal method for preparing anthoid BiVO4. The method comprises the following steps of: under a stirring condition, adding cetylpyridinium chloride as a surface active agent to a mixed solution, wherein the volume ratio of ethanol to glycol to concentrated HNO3 (the concentration is 67 percent) in the mixed solution is 12:12:1, the concentration of the cetylpyridinium chloride is 0.48mol / L; adding Bi(NO3)3.5H2O and NH4VO3 according to the molar ratio of Bi(NO3)3 to NH4VO3 to nitric acid is 1:1:4 after dissolving; adding NaOH powder to control the pH value of the solution to 3-7; transferring the mixed solution into a stainless steel self compression kettle (the volume filling degree is 63 percent) with a polytetrafluoroethylene lining and putting the stainless steel self compression kettle in a thermostat for treating for 12h at a temperature of 100 DEG C; taking out the stainless steel self compression kettle and cooling to room temperature; and after drying an obtained product for 12h at a temperature of 60 DEG C, obtaining BiVO4 micron particles with monoclinic scheelite structures. Bismuth orthovanadate crystals with specific appearances obtained by the method have good application prospects in the field of photocatalysis, electrode materials, pigment, ionic conductive ceramics, and the like.
Owner:BEIJING UNIV OF TECH

Method for reinforced ultrafiltration treatment of phenol-containing waste-water by ultrafiltration membrane

The invention discloses a method for ultra-filtration membrane strengthened ultra-filtration treatment of phenol-containing sewage. The method comprises: first adding cetylpyridinium chloride which is a cationic surfactant, and sodium carbonate into the phenol-containing sewage, stirring uniformly and standing for reaction where cetylpyridinium chloride monomer molecules produce micelles by self-assembly and then solubilize the phenol contained in the water; pumping the water to an ultra-filtration component for filtration where the cetylpyridinium chloride micelles with being solubilized the phenol contained in the water are intercepted by the ultra-filtration membrane so that the phenol contained in the water is removed. The phenol concentration in the sewage is 5mg/L-200mg/L; the addition of cetylpyridinium chloride is 20*10<-3>mol/L-30*10<-3>mol/L; the addition of sodium carbonate is 1*10<-3>mol/L-20*10<-3>mol/L; the weight of molecules intercepted by the ultra-filtration membrane is 6000-10000Dalton; the membrane operation pressure is 0.05MPa-0.20MPa. The method is carried out in an intermittent type, and the standing reaction time is 0.5-10h. In treating the phenol-containing sewage, the invention has excellent phenol removal performance, low energy consumption, simple operation, low surfactant consumption and low cost. In addition, the surfactant and the phenol can be recycled.
Owner:HUNAN UNIV
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