7results about How to "Avoid Agglomeration and Precipitation" patented technology

This invention relates to the field of skincare technology, disclosing a composition containing acetylated curcumin, its preparation method, and its application. The composition comprises 0.01-0.50 wt% acetylated curcumin, 0.10-0.5 wt% ferulic acid, 0.05-0.40 wt% citric acid compounds, and 5.00-20.00 wt% polyol. Ferulic acid quenches reactive oxygen species and improves the stability of acetylated curcumin; citric acid compounds stabilize the pH of the system, chelate metal ions, block the Fenton reaction, and inhibit the generation of •OH free radicals; the polyol enhances the water solubility of acetylated curcumin and improves the stability of ferulic acid. This invention, through the compounding of ferulic acid, citric acid compounds, and polyol, significantly reduces the problems of discoloration, off-flavor, and pH decrease caused by the decomposition of acetylated curcumin aqueous solutions under high temperature or light conditions. Furthermore, the preparation process is simple, easy to operate, and highly adaptable to various processes.

The present application relates to natural product separation and extraction technical field, specifically disclose a kind of method for separating and extracting astaxanthin with haematococcus pluvialis as raw material, comprising the following steps: (1) haematococcus pluvialis pretreatment preparation haematococcus pluvialis dry powder;(2) using ultrasonic-assisted natural deep eutectic solvent separates and extracts astaxanthin from haematococcus pluvialis dry powder and obtains crude extract;(3) using macroporous resin dynamic adsorption crude extract and purifying and collecting astaxanthin eluate;(4) astaxanthin eluate is concentrated by rotary evaporation under reduced pressure, freeze-dried, and astaxanthin crystal powder is obtained.The method provided by the present application effectively improves the extraction rate of astaxanthin by the ternary synergy of natural deep eutectic solvent, the trans-phase antioxidant synergy of tocopherol and ascorbyl palmitate, and the mild process of ultrasonic-assisted extraction and resin gradient elution, maintains the purity of astaxanthin and the proportion of all-trans astaxanthin, and prolongs the antioxidant retention time of astaxanthin.

The invention discloses a film-forming lubricating wear-resistant lead screw working fluid and a preparation method thereof. The processing liquid is prepared from the following components in parts by weight: 12 to 28 parts of surface modified nano nickel ferrite, 2.5 to 8.5 parts of ferroferric oxide, 6 to 15 parts of a compound adhesive, 8 to 22 parts of a compound dispersant, 0.8 to 3.2 parts of a compound antioxidant and 50 to 99 parts of base oil. The preparation method comprises the steps of step-by-step modification, ultrasonic dispersion and high-shear homogenization. Through a magnetic synergistic lubrication system and a rapid film forming technology, the technical problems of insufficient lubrication performance, poor wear resistance and difficult film forming of the traditional screw rod working fluid are solved. Compared with the traditional cutting fluid, the optimal embodiment of the invention realizes the remarkable effects that the friction coefficient is reduced by 57.1%, the tool wear is reduced by 42.5%, the surface roughness is improved by 60.4%, and the dispersion stability exceeds 30 days.

The invention discloses preparation and application of a super-strong light-resistant hydrophobic nano lignin / SiO2-TiO2 wood protective coating, and belongs to the technical field of wood functional modification. According to the preparation method disclosed by the invention, firstly, tetraethoxysilane is taken as a silicon source, and the surfaces of nano TiO2 particles are coated with SiO2 layers, so that the SiO2-TiO2 composite particles with core-shell structures are prepared, and the problems that nano TiO2 is easy to agglomerate and poor in dispersity are solved. Then, alkali lignin is subjected to quaternization modification, and quaternization lignin nano particles (QAL-LNPs) are prepared. And finally, the QAL-LNPs and the SiO2-TiO2 particles are jointly dispersed in a mixed solution composed of absolute ethyl alcohol, a silane coupling agent and a water repellent agent to form a stable composite coating solution, the stable composite coating solution is sprayed to the surface of the wood, and the composite coating is obtained after curing. The coating endows wood with excellent ultraviolet aging resistance and good hydrophobicity, and is suitable for surface protection of outdoor wood products and wood structure buildings.

This invention relates to a highly stable lutein-zeaxanthin soft capsule and its preparation process, belonging to the field of health product technology. The soft capsule comprises a shell and contents. The contents include core-shell structured composite coated particles and a plant oil carrier. The particles have a core-shell structure: the core is a microcapsule formed by emulsifying lutein and zeaxanthin with sodium octenyl succinate starch; the outer shell is a coating layer formed by in-situ deposition of zein on the surface of the core microcapsule using an antisolvent precipitation method. Natural antioxidants are dissolved in the plant oil carrier, spontaneously enriching in the oil phase region between the inner wall of the shell and the composite coated particles to form an interfacial antioxidant protective layer. The preparation process is carried out at low temperature, under nitrogen protection, and protected from light throughout. The gradient core-shell structure achieves stable protection in the stomach and targeted release into the intestine. Combined with interfacial antioxidant protection and comprehensive process protection, it improves the storage stability and bioavailability of the active ingredients. The product has no solvent residue and is safe for industrial production.

The invention relates to the technical field of separation and extraction of natural products, in particular to a method for supercritical separation and extraction of astaxanthin, which comprises the following steps: (1) weighing raw material components in parts by weight; (2) mixing a biomass raw material rich in astaxanthin with the functionalized deep-eutectic solvent, and performing physical field enhanced extraction to obtain an extracting solution; (3) filtering the extracting solution through a vibrating membrane, and purifying to obtain a trapped fluid containing astaxanthin; and (4) carrying out supercritical CO2 back extraction on the trapped fluid, separating to obtain an astaxanthin product, and recovering the functional eutectic solvent. According to the method, continuous membrane separation and purification under the eutectic solvent system are realized, the purity of astaxanthin and the proportion of all-trans astaxanthin are maintained while the extraction rate of astaxanthin is increased, the solvent can be recycled after being recovered, and the production cost and waste liquid discharge are greatly reduced. All the raw materials are nontoxic and harmless, no organic solvent is used in the technological process, and good application prospects are achieved.

This invention relates to the field of detergent technology, specifically disclosing a highly active detergent composition containing succinic anhydride and its preparation method. The invention prepares the highly active detergent composition by hydrolyzing a small amount of alkenyl succinic anhydride to obtain succinic acid. The invention also provides a lignin-based surfactant to work in conjunction with the composition, effectively preventing the redeposition of dirt washed off the fabric, thus ensuring washing performance. The composition prepared by this invention can prevent the aggregation and precipitation of dirt particles during washing, ensuring the formula remains stable and does not separate throughout its shelf life and during washing, while improving detergency.