159 results about "Oil oxidation" patented technology

There is provided a method and a device of monitoring oil oxidation in real time. The method of the present invention comprises the steps of: irradiating ultraviolet light into oil to be monitored; measuring fluorescence emission intensity of the oil in red, green and blue wavelength bands; determining one value measured in a relatively long wavelength band and the other value measured in a relatively short wavelength band among the fluorescence emission intensity measured in the red, green and blue wavelength bands; calculating a fluorescence emission ratio which is defined as a ratio of the value measured in the relatively long wavelength band to the value measured in the relatively short wavelength band; and monitoring a change in the fluorescence emission ratio. It is then determined whether the fluorescence emission ratio reaches a predetermined critical magnitude. When the fluorescence emission ratio reaches the critical magnitude, the necessity of replacing the oil with new one is indicated.

The combination of a molybdenum compound and an aromatic amine has been found to produce a synergistic antioxidant effect when used as an antioxidant additive for lubricating oils. The combination has been found to be particularly effective under catalytic oxidation conditions, e.g. Fe catalysed oxidation of crankcase lubricating oils.

There is provided a method and a device of monitoring oil oxidation in real time. The method of the present invention comprises the steps of: irradiating ultraviolet light into oil to be monitored; measuring fluorescence emission intensity of the oil in red, green and blue wavelength bands; determining one value measured in a relatively long wavelength band and the other value measured in a relatively short wavelength band among the fluorescence emission intensity measured in the red, green and blue wavelength bands; calculating a fluorescence emission ratio which is defined as a ratio of the value measured in the relatively long wavelength band to the value measured in the relatively short wavelength band; and monitoring a change in the fluorescence emission ratio. It is then determined whether the fluorescence emission ratio reaches a predetermined critical magnitude. When the fluorescence emission ratio reaches the critical magnitude, the necessity of replacing the oil with new one is indicated.

The invention discloses a lubricating oil additive composite with oxidation stability and it comprises alkyl diphenylamine and ester shielding phenol.

The present invention belongs to the field of food producing technology, and is especially production process of edible oil added with micro emulsion of grape seed protocyanidin. W / O type g micro emulsion of grape seed protocyanidin is prepared with polyglycerol monooleate as surfactant, alcohol as co-surfactant and edible oil as the continuous phase. When the ratio between surfactant and co-surfactant is 4 to 1, may be reached the maximum grape seed protocyanidin adding amount of 538 mcg / ml, average particle diameter of the dispersed phase particles of 23.96 nm and clear transparent micro emulsion with strong oil oxidation resistance. The present invention adds grape seed protocyanidin as natural antioxidant into edible oil and makes the edible safe, reliable, nutritive and antioxidant.

An apparatus for measuring oil oxidation is capable of being mounted to mechanical devices for detecting power of fluorescent light reflected from oil in real time as an indication of the oil oxidation. A plurality of first optical fibers are connected to a light-emitting member for introducing the light into oil at different incidence points. A plurality of light-reflecting mirrors are immersed in the oil and disposed opposite to the incidence points. The light-reflecting mirrors are located at different distances from the incidence points. A plurality of second optical fibers are connected to the incidence points, respectively. A plurality of light-receiving members are connected to the second optical fibers for receiving the light and outputting the signals corresponding to the received light. A control portion calculates a fluorescence quantum yield and a light absorption coefficient of the oil based upon the signals from the light-receiving members and compares them with the reference values pre-stored in the control portion to determine the oil oxidation.

The invention belongs to the field of aquatic product processing, particularly relates to a crawfish crispy crawfish ball product and a manufacturing technology thereof, and belongs to an instant food. The manufacturing technology comprises the step of using an entire crawfish, a shrimp with the body length of 5-10 cm and the body weight less than 25 g obtained by the grading of crawfish meat, or an imperfect crawfish as a raw material to obtain a net crawfish shell being subjected to processes of sorting, cleaning, head and intestine removing, boiling with salts for flavoring, crisping of the crawfish shell, secondary flavoring, packaging, and the like to manufacture the crispy crawfish ball product. The crispy crawfish ball product has the characteristics of crispness and tasty, primary color and taste, low fat content, low water activity, long shelf life, and the like. Compared with the prior art, the crispy crawfish ball product adopts the technologies of the crisping of crawfish shell with the combination of slow freezing and vacuum frying, and compound flavoring and humidity control crisp protection with the combination of pre-cook and secondary flavoring, so that not only is the color of the crispy crawfish ball obviously improved, are the fat content and the water activity of the product lowered, is the crisp of the crawfish shell promoted, and is the crisp maintained, but also the oxidation rate of frying oil is obviously slowed down, the usage count of the oil is increased, the manufacturing cost is lowered, and the shelf life of the product is prolonged.

Belonging to the field of oil oxidation desulfurization, the invention in particular relates to a method for catalytic oxidation of fuel oil desulfurization with a three-component deep eutectic solvent. The method includes: taking a quaternary ammonium salt or quaternary phosphonium salt as the hydrogen bond acceptor, and using boric acid and organic alcohol as the hydrogen bond donor to prepare the deep eutectic solvent; and adopting the deep eutectic solvent as the catalyst and extractant, and employing hydrogen peroxide as the oxidant for oxidation removal of dibenzothiophene sulfide from the oil product. The deep eutectic solvent adopted by the invention uses cheap and easily raw materials for synthesis, and can be obtained by one-step stirring, the prepared deep eutectic solvent is greener and more environmentally friendly, has a sulfur removal rate up to 99.5% and good desulfurization effect, and the deep eutectic solvent can be recycled.

The invention relates to diesel oil oxidation extraction desulphurization method. It includes the following steps: mixing the hydro-fining or non diesel oil with phase-transfer catalyst; adding hydrogen peroxide to react for 30-300min to transform organic sulfide to sulfone or sulfoxide; cooling the oxidation diesel oil to room temperature to separate out the phase-trasnfer catalyst; processing by reducer aqueous solution with 5-20% density to remove un-reacted hydrogen peroxide; and processing by extracting agent to remove sulfone or sulfoxide to gain low sulfur diesel oil with less than 350ppm sulfur content.

The invention provides an oil storage barrel comprising an oil barrel and an oil barrel cover mounted on the oil barrel. The oil storage barrel is characterized in that two CPCs (Circular Plastic Connectors) are fixed on the oil barrel cover, wherein the lower end of one CPC is connected with a relatively longer internally connected oil pipe which is inserted in the oil body of the oil barrel and is close to the bottom of the oil barrel; and the lower end of the other CPC is connected with a relatively shorter internally connected oil pipe which is exposed on the oil surface. By adopting the CPCs in the invention, the oil barrel cover is prevented from being fully opened so as to reduce introduced oxygen, effectively prevent oil oxidation and achieve convenience in use, and liquid leakage is avoided after multiple uses, thus, the problem of oil oxidation and deterioration caused in processes of filling, transporting, sampling, storing, using, and the like by oil production enterprises is effectively solved, oxygen is prevented from being introduced into the oil barrel after the oil barrel cover is opened and oil sampling and oil detecting are convenient.