8results about How to "Good low temperature stability" patented technology

This application relates to the field of refrigeration systems, disclosing a refrigeration oil, a working fluid composition for refrigeration machines, and a refrigeration system. By adding a specific type of surfactant, this application significantly reduces the surface tension of the refrigeration oil, improves its compatibility with refrigerants such as hydrofluorocarbons, and reduces oil film formation or oil residue in the refrigeration system. The refrigeration oil described in this application has suitable viscosity and solubility viscosity, meeting the normal operating requirements of the compressor, while also effectively inhibiting the formation of oil film on the heat exchanger surface, thereby improving heat exchange efficiency. Furthermore, this refrigeration oil has good lubricity, low-temperature fluidity, and thermochemical stability, which can promote the circulation of the refrigeration oil in the refrigeration system pipeline, improve oil return efficiency, and extend the compressor's service life.

The application relates to the field of lubricating oil, and more particularly to a novel wind power gear oil compound and a preparation method thereof. The novel wind power gear oil compound comprises, in mass parts, at least the following raw materials: a base agent 60-80 parts, an oily agent 1-8 parts, an antioxidant 3-6 parts, an anti-wear agent 3-8 parts and an improver 4-10 parts. The application provides a novel wind power gear oil compound which can be directly used as a wind power gear lubricating oil or used as an additive of other lubricating oil systems, can effectively enhance the extreme pressure resistance, corrosion and rust resistance, low-temperature flow and stability of the lubricating oil under the guarantee of excellent lubricating wear resistance and weather resistance and aging resistance of the lubricating oil, and meets the performance requirements of more complex wind power speed-up gear boxes.

This invention belongs to the field of environmentally friendly fuel technology, specifically relating to a method for preparing a green, low-carbon, and highly efficient modified fuel for alcohol-hydrogen engines. This invention comprehensively improves fuel performance through a progressive synergistic architecture of a bio-methanol platform – an oxygen-containing combustion-promoting system – a stability barrier – and a low-energy-consumption blending path. Using bio-methanol as a base, it optimizes combustion by compounding with oxygen-containing components such as 2-MTHF and DMM / MF, achieving rapid ignition, emission reduction, and noise reduction. Phase behavior is regulated by isobutanol and polyether-modified silicon, achieving a reversible and stable phase without the need for high-HLB surfactants, preventing deposition and gas lock. A four-fold protective barrier is constructed using GMO and fluorinated silica polyethers, combined with antioxidant synergy to achieve corrosion resistance and aging resistance. The process adopts a sequential design of front-end purification – mid-stage two-phase construction – and end-stage static mixing, achieving low-energy homogenization and ensuring storage, transportation, and operational stability.

The application discloses a method for refining and removing impurities from Chinese torreya seed kernels by gradient pressing, and at least comprises the following steps: S3, segment refining: pumping the mixed Chinese torreya crude oil obtained in step S2 into a refining system, and sequentially performing low-temperature step-by-step treatment in the following five stages: S3.1, enzymatic ultrasonic low-temperature degumming: adding water and a composite enzyme preparation into the mixed Chinese torreya crude oil, stirring to form a mixed emulsion, controlling the reaction temperature of the mixed emulsion to be 40-45 DEG C, applying ultrasonic cavitation treatment for 30-40 minutes, then centrifugally separating and removing gum to obtain degummed oil. The application adopts low-temperature step-by-step segment refining, and through five-step low-temperature step-by-step synergistic refining of degumming, deacidification, decolorization, deodorization and dewaxing, an integrated synergistic impurity removal system is formed: enzymatic ultrasonic degumming completely removes gum, provides low-impurity and high-quality oil phase raw materials for the subsequent deacidification section, reduces the interference of impurities on the mass transfer efficiency of microbubble stripping, and lays the foundation for synergistic impurity removal.

This invention relates to a hair-cleansing composition that uses a specific olefin sulfonic acid or its salt, which improves its performance when applied to hair and exhibits excellent low-temperature stability. Specifically, this invention relates to a hair-cleansing composition comprising the following components (A) to (C): (A) an olefin sulfonic acid or its salt having 16 carbon atoms, obtained by sulfonating a raw olefin having 16 carbon atoms with an average double bond position of 3.9 to 4.5; (B) an amphoteric surfactant; and (C) a nonionic surfactant, wherein the mass ratio of component (A) to component (B) is 1 to 50.

The application discloses a kind of quaternary ammonium salt cationic surfactants and its preparation method and application in defoaming glass water, it is related to surfactant technical field.The quaternary ammonium salt cationic surfactant is prepared by the following method: bis-trimethylsiloxy methyl silane is reacted with 4-vinyl phenyl glycidyl ether to generate intermediate 1;Heptaglycol monomethyl ether is reacted with intermediate 1 to generate intermediate 2;Dodecyl dimethyl tertiary amine is reacted with 3-bromo-2,2-bis(bromomethyl) propionic acid to generate quaternary ammonium salt compound;Intermediate 2 is reacted with quaternary ammonium salt compound to generate surfactant.The surfactant prepared in the application has lower surface tension and contact angle, and shows excellent low-temperature stability and detergency.

The application discloses a low-temperature denitration catalyst and a preparation method thereof, and belongs to the technical field of flue gas denitration catalysts. 60 The catalyst is prepared by doping fullerene C 60 The pi electron system of C 60 is highly delocalized on the three-dimensional curved surface thereof, so that C 60 has excellent electron transfer capacity; and the doping proportion of C 60 can effectively promote the rapid progress of the catalytic reaction. Therefore, the catalyst prepared by the application can be applied to low-temperature flue gas denitration, can significantly improve the denitration efficiency, can widen the active temperature range of the catalyst, and can solve the problems of poor low-temperature activity, insufficient sulfur resistance and easy poisoning of traditional catalysts.

This invention discloses a phosphate ester-based pesticide emulsifier suitable for aerial spraying and its preparation method, belonging to the field of pesticide adjuvant technology. The emulsifier is formulated from isomeric alcohol polyoxyethylene ether phosphate, nonionic surfactant, co-emulsifier, and anti-drift modifier in a specific ratio, with isomeric alcohol polyoxyethylene ether phosphate as the core active component. Through precise control of the component ratios and preparation process, the emulsifier possesses excellent emulsifying and dispersing properties, low foaming properties, anti-drift properties, and low-temperature stability. It is suitable for the high dilution ratios, rapid atomization, and complex operating environments of drone aerial spraying, effectively solving the technical pain points of existing aerial spraying emulsifiers such as easy drift, poor emulsification stability, insufficient efficacy, and easy precipitation at low temperatures. The preparation process of this invention is simple, environmentally friendly, and has low production costs. It can be widely applied to aerial spraying operations of various pesticide emulsifiable concentrates, water-in-oil emulsions, and microemulsions, significantly improving pesticide utilization, reducing pesticide waste and environmental pollution, and has extremely high practical value and promising prospects for promotion.