9 results about "Retention time" patented technology

The invention discloses water-based environment-friendly color-changing nail polish which comprises the following components: 40.0-50.0 parts by weight of water-based aliphatic polyurethane, 35.0-45.0parts by weight of a water-based aliphatic polyurethane acrylic acid copolymer, 3.0 to 6.0 parts by weight of a reversible temperature-sensitive color-changing material, 3.0 to 6.0 parts by weight ofa reversible photo-sensitive color-changing material, 0-2.0 parts of a pigment, 0.1-0.5 part of a wetting agent, 1.0-2.0 parts by weight of a thickening agent, 0.5-1.0 part of an adhesion promoter, 0.5-1.0 part of a preservative, 3.0-5.0 parts of a coalescing agent, 0-2.0 parts of other additives and the balance of deionized water. The reversible color-changing powder and other components are lowin odor and harmless to human health, environment-friendly, strong in adhesive force and long in retention time on nails, and can be used for blending various colors, and different colors can be changed along with different temperatures and different intensity of light, and the reversible temperature-sensitive color-changing material and the photo-sensitive color-changing material are good in stability, not easy to fade, and capable of maintaining a bright color for a long time.

The invention discloses an air freshener and a preparation method thereof. The air freshener comprises a fragrant substance and enfleurage powder, wherein the fragrant substance is adsorbed in the enfleurage powder under a stirring effect. The preparation method of the air freshener comprises the following steps: adding fragrance substance into the enfleurage powder under the stirring effect, andexecuting continuous stirring until the fragrance substance is adsorbed in the enfleurage powder to obtain dispersed powder; heating a coagulant until the coagulant is completely dissolved, adding thedispersed powder, executing stirring until the dispersion is uniform, and executing cooling to obtain the air freshener. Compared with an existing air freshener, the air freshener has longer fragrance retention time.

An air floatation sewage treatment device based on superoxide nano micro-bubbles comprises a wastewater tank, a dosing storage tank and an air floatation tank, the wastewater tank and the dosing storage tank are communicated with the air floatation tank through a mixing pipeline, and a water inlet pump and a nano microbubble generating device are further arranged on the mixing pipeline; the interior of the air floatation tank is divided into a release area, a sedimentation area and a water outlet area, the release area and the sedimentation area are separated by a first flow guide plate, the sedimentation area and the water outlet area are separated through a second flow guide plate, and a water outlet is formed in the bottom of the water outlet area; the sedimentation area is internally further provided with a slag discharging pond which is used for separating the sedimentation area from the upper part of the sedimentation area, the top of the sedimentation area is provided with a slag floating machine used for scraping floating slag at the upper part of the sedimentation area into the slag discharging pond, a slag discharging hole is formed in the bottom of the slag discharging pond, and a plurality of second sludge discharging hoppers which are sequentially arranged are arranged at the bottom of the sedimentation area. The device is reasonable in design, the generated micro-bubbles are small in diameter and long in retention time in water, particles in water can be effectively adhered and separated, and the sewage treatment effect is good.

The invention discloses a method for measuring pasteurization time. The method comprises the following steps: (1) forming at least one detection hole in each of the front end and the back end of a pasteurization insulation tube, that is, forming a front-end detection hole and a back-end detection hole, and mounting at least one potential monitoring probe inside each of the front-end detection hole and the back-end detection hole respectively; (2) arranging a needle opening at a 1-50cm position of the upstream of the front-end detection hole for injecting salt water; (3) starting pasteurization equipment, substituting milk with water, and enabling water to flow in the equipment in the flowing form of milk in a normal pasteurization process; (4) injecting the salt water from the needle opening, monitoring potential changes of the potential monitoring probes at the front-end detection hole and the back-end detection hole, and recording the appearance time difference between potential peaks of the two. By the method for measuring the pasteurization retention time of the high-quality milk, the retention time in the pasteurization process is measured by a potentiometric method, so that the control precision of the retention time in the pasteurization process is improved, and a stable and reliable equipment guarantee is provide for preparation of the high-quality milk.

The invention discloses a detection method of authentic rheum officinale seeds, which adopts a high-efficient liquid-phase chromatography to detect, and the detection method comprises the following steps of (1) taking seeds to be detected, grinding the seeds, extracting the seeds through methanol, filtering to obtain the filter liquid, removing methanol, hydrolyzing with acid, extracting with organic solvent to obtain an organic solvent layer, recycling the solvent until being dried, and re-dissolving to prepare sample solution; (2) taking aloe-emodin reference substances to be dissolved to prepare reference substance solution; (3) utilizing the high-efficient liquid-phase chromatography to detect, wherein the colored peak in chromatogram map of the sample solution is maintained consistent with the colored peak of the aloe-emodin reference substances on the aspect of the time, and determining whether the authentic rheum officinale seeds are contained in the seeds to be detected or not, wherein the chromatography condition is as follows: solid phase: octadecylsilane chemically bonded silica, flow phase: methanol-0.1 percent phosphoric acid solution, the volume ratio of the solid phase and the flow phase is 80 to 90: 10 to 20; and the detection wavelength: 254nm. The detection method of the authentic rheum officinale seeds is high in accuracy, convenient in operation, low in cost and good in market application prospect.

The invention discloses an adsorption column, particularly relates to an adsorption column which takes activated carbon as an adsorbent and is used for amino acid adsorption and purification, and belongs to the technical field of chemical unit equipment. The amino acid activated carbon adsorption column comprises a column body, wherein an inlet is formed in the lower end portion of the column body, an outlet is formed in the upper end portion of the column body, an adsorption inlet control valve is arranged on an inlet pipeline, an adsorption outlet control valve is arranged on an outlet pipeline, and activated carbon packing layers with different particle sizes are filled into the column body in a layered mode. The amino acid activated carbon adsorption column is reasonable in design, the adsorption retention time can be effectively controlled due to the bottom-up adsorption method, and the defect that according to a traditional adsorption method, the adsorption efficiency is not high due to channeling produced when the distribution performance of raw material liquid on the adsorbent is not high is overcome, and the amino acid activated carbon adsorption column is particularly suitable for decoloration of amino acid original liquid and removal of organic impurities, has the advantage of being high in control degree and good in adsorption efficiency and has wide application space.