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92results about How to "Maintain viscosity" patented technology

Ultralow temperature ash-free antiwear incombustible ester type hydraulic oil, production technology and application thereof

The invention discloses ultralow temperature ash-free antiwear incombustible ester type hydraulic oil, a production technology and application thereof. The ultralow temperature ash-free antiwear incombustible ester type hydraulic oil is prepared from a viscosity index improver, a pour point reducer, an emulsion breaker, a defoaming agent, an antiwear reagent at extreme pressure, an ash-free detergent dispersant, an antirust agent, an antioxidant, a fire retardant and base oil. The ultralow temperature ash-free antiwear incombustible ester type hydraulic oil has the advantages that firstly, theoil has the extremely stable molecular structure, and the good oxidation stability; secondly, the oil has the extremely good lubricating performance and antiwear performance, and can effectively prolong the life of an engine; thirdly, the oil has the low temperature fluidity so that the engine can be easily started; fourthly, the oil has the good high temperature high shearing performance, the volatile loss at a high temperature is less, and the oil film tenacity and strength of an oil product at the high temperature are ensured; fifthly, the viscocity and the lubrication of the oil can be maintained after a ultralong driving process; sixthly, the oil has the good detergent dispersing performance, and the dust deposition amount is less after the oil is used for a long time; seventhly, theoil has the good biodegradability; and eighthly, the oil has low condensation point and can be widely applied to bad working environments such as low temperature and cold.
Owner:冠仕(上海)新能源科技有限公司

Preparation method for freeze-dried Chinese yam superfine micro-powder

The invention provides a preparation method for freeze-dried Chinese yam superfine micro-powder. The preparation method comprises the following steps: selecting materials and washing; peeling off and slicing; lyophilizing; crushing to obtain superfine micro-powder and sealing and packaging; after selecting the materials and washing, pre-cooling Chinese yams; then peeling off and slicing, wherein the pre-cooling temperature of the pre-cooling step ranges from-27 DEG C to -30 DEG C and the pre-cooling time of the pre-cooling step lasts for 3h; the slicing thickness in the step of peeling off and slicing is 3-5mm; the temperature in the lyophilizing step ranges from -35 DEG C to -45 DEG C; the water content of the lyophilized materials is less than or equal to 3%; the step of crushing to obtain the superfine micro-powder adopts a vibration type superfine micro-powder crusher to crush the materials; the temperature of the materials is controlled to -10 DEG C in the crushing process. According to the preparation method for the freeze-dried Chinese yam superfine micro-powder provided by the invention, immersion by adopting color-protecting solution and enzyme deactivation are not needed and the loss of heat-sensitive components of the prepared Chinese yam micro-powder is small; the loss of nutrition ingredients of the raw materials is little, the reconstitution property is good and the medical value is high.
Owner:HENAN UNIV OF SCI & TECH
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