30 results about "Fluorescent whitening agent VBL" patented technology

A quantitative determination method of fluorescent whitening agents VBL and ABP used in cigarette paper is characterized in that the method mainly includes steps mention below. The first step is to determine the chromatographic conditions. A chromatographic column is C18, 5Mu m column of 150mm*46mm. A mobile phase is methane or water with 45 / 55(V / V). The flow speed of the mobile phase is 1.0mL / min. The detection wavelengths include an excitation wavelength of 350mm and an emission wavelength of 425mm. The second step is the detection step, which is also a preparation step of a calibration curve. Treatment liquid for paper sample to be detected is injected in a high performance liquid chromatograph. The quality is determined according to the reserved time and the quantity is determined according to the peak area. The invention provides a quantitative determination method of fluorescent whitening agents VBL and ABP used in cigarette paper, which has the advantages of accurate detection and simple operation. The qualitative and quantitative detection of the fluorescent whitening agents VBL and ABP in cigarette paper, filter rod forming paper and cigarette tipping paper is made to be convenient for industry technicians. And potential damages on physical health of customers caused by excess whitening agent can be prevented.

The invention belongs to the daily chemical industry technical field, in particular to an environmental friendly synthetic detergent taking poly epoxy succinic acid as a washing assistant. The synthetic detergent comprises the following components according to the percentage by weight: 8%-15% of linear alkylbenzene sulphonic acid, 10-30% of poly epoxy succinic acid, 1%-5% of fatty alcohol polyoxyethylene ether (polyoxyethylene fatty alcohol sodium sulfate), 4%-6% of sodium bicarbonate, 4%-6% of borax, 0.5%-1.5% of polyvinyl-pyrrolidone, 5%-12% of sodium silicate, and 0.03%-0.2% of optical brightness VBL, and the rest of bulking agent sodium sulfate, which meets the gross weight of 100%. The poly epoxy succinic acid used by the synthetic detergent as the washing detergent plays a part in anti redeposition and dispersion, not only can chelate with metal ions such as calcium, magnesium and the like but also has dispersive action on calcium and magnetism precipitation, thus achieving the effect of anti redeposition and dispersion and increasing the washing effect. All components in the synthetic detergent have good synergistic action and obvious decontamination and anti redeposition effects. The environmental friendly synthetic detergent does not contain nitrogen and phosphorus, and the poly epoxy succinic acid can be biodegraded; therefore, after being used, the synthetic detergent does not cause the severe harm to the environment.

The invention discloses a preparation method of fluorescent composite whitened attapulgite, which is characterized by comprising the following steps: (1) after pulverizing attapulgite, screening, adding water to prepare a disperse system with a certain concentration, stirring, standing for some time, taking the supernatant suspension, carrying out centrifugal dewatering on the supernatant suspension, and drying at certain temperature to obtain purified attapulgite; (2) preparing the purified attapulgite into a dispersion, dropwisely adding a silane coupling agent while stirring, heating to react for some time, filtering, washing, drying, grinding and screening to obtain modified attapulgite; and (3) carrying out composite reaction on the modified attapulgite with a melamine-formaldehyde polycondensate and a water-soluble fluorescent whitening agent VBL to obtain the fluorescent whitened attapulgite. The attapulgite surface is modified by the silane coupling agent, thereby enhancing the dispersity of the attapulgite and the coupling action with resin; and the compound obtained by reacting the melamine-formaldehyde resin with the fluorescent whitening agent is compounded onto the attapulgite surface under the coupling action, thereby effectively enhancing the fixation action of the fluorescent whitening agent on the attapulgite surface and achieving the effect of whitening the attapulgite.