4results about How to "Moderate pH" patented technology

This invention relates to the field of organic polymer adhesives, specifically disclosing a modified castor oil polyurethane adhesive containing catalytic groups, its preparation method, and its application. The adhesive is a two-component compound. By weight, component A comprises 30.0-50.0 parts modified castor oil and 0.0-30.0 parts refined castor oil; component B comprises 30.0-50.0 parts polyisocyanate or a modified polyisocyanate and 0.00-0.05 parts dehydrating agent. The modified castor oil is prepared by first reacting refined castor oil and cysteine ​​hydrochloride via a mercapto-olefin addition reaction, followed by neutralization with a strong base. The modified castor oil simultaneously contains hydroxyl, amino reactive groups, and quaternary ammonium salt catalytic groups, exhibiting rapid reaction with isocyanate groups. The mixture of the two components exhibits certain thixotropy, and the crosslinked product has high strength.

This utility model discloses a circulating water / chilled water switching device for NMP purification, comprising a water storage tank and a connecting pipe. The connecting pipe is installed at the top of the water storage tank, and a filter block is installed inside the connecting pipe. Multiple sets of L-shaped grooves with equal spacing are arranged on the inner wall of the connecting pipe. Multiple sets of limiting blocks with equal spacing are arranged on the outer wall of the filter block, and the limiting blocks are slidably connected to the L-shaped grooves. A drive seat is installed on one side of the outer wall of the water storage tank, and a stepper motor is installed on the side wall of the drive seat. A worm gear is installed at the output end of the stepper motor and is movably connected to the drive seat. A stirring frame is movably installed inside the drive seat on one side of the worm gear, and a worm wheel is provided on the surface of the stirring frame. This utility model not only achieves filtration of impurities in the circulating water and neutralization of acidic and alkaline substances, facilitating flexible switching between two different water sources, but also improves the convenience of switching water supply.

This invention relates to the field of daily chemical technology, and in particular to a method for preparing kava extract based on enzymatic hydrolysis technology, its products, and applications. The preparation method comprises the following steps: S01 low-temperature treatment of kava rhizomes, followed by pulverization and sieving; S02 enzymatic hydrolysis of the kava rhizome powder; S03 fermentation treatment of the kava rhizome enzymatic hydrolysis extract obtained in S02; and S04 stabilization treatment of the fermented kava rhizome extract obtained in S03. This invention employs a combination of multi-enzyme synergistic pretreatment and probiotic co-fermentation, conducted entirely in an aqueous environment, eliminating the need for organic solvents such as ethanol and methanol. The operation is safe and environmentally friendly, aligning with the development trend of green raw materials in cosmetics.

The utility model discloses a citrus water and fertilizer applying device which comprises a liquid storage tank, a mixing mechanism, a conveying pipeline and a control module, a water inlet and a feeding hole are formed in the top of the liquid storage tank and are respectively used for introducing a water source and a fertilizer; a liquid outlet is formed in the bottom of the liquid storage tank and is used for outputting the mixed water and fertilizer solution; a mixing mechanism is mounted in the liquid storage tank and consists of a plurality of groups of stirring assemblies and radial dispersion rods, the stirring assemblies are responsible for mixing water and fertilizer, and the radial dispersion rods are mounted on the outer surfaces of the stirring assemblies and are used for ensuring the uniformity of a water and fertilizer solution; one end of the conveying pipeline is connected with the liquid outlet of the liquid storage tank, and the other end is connected with the sprinkler head to form a water-fertilizer solution conveying channel; a pH value sensor is arranged at the liquid outlet; the control module can adjust the output flow of the water-fertilizer mixed liquid to realize precise fertilization; in general, the integrated design simplifies the fertilization process, the operation convenience and efficiency are improved, and citrus planting is more modern and intelligent.