158 results about "Oil oxidation" patented technology

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 relates to a method for making docosahexaenic acid (DHA) grease through adopting bio-enzyme method wall breaking, comprising the following steps that: Crypthecodinium cohnii(Seligo)Javornicky is taken as starting strain; alga cell is obtained through carrying out continuous cultivation of Crypthecodinium cohnii(Seligo)Javornicky in liquid medium; and then DHA grease is extracted from the alga cell through bio-enzyme method wall breaking. The method has the advantages that: alga cell wall breaking is complete with the wall-breaking rate reaching more than 95 percent; the method does not need a drying step, and can prevent the oxidation of DHA crude oil, thereby ensuring that the peroxide value of extracted grease is extremely low (i.e. the POV value is less than 0.5); moreover, the yield of the extracted grease is more than 90 percent of total oil, while the refining yield is more than 70 percent of crude oil.

A method of preserving a food product from both deterioration due to microbial growth and oxidation of any constituent fats or oils which may be present within said food product comprises adding to the food product one or more phytosterols, phytostanols, or mixtures thereof.

The invention relates to a method for testing oil oxidation stability. The method comprises the following steps of: supplying an oil processing device which comprises a thermostatic container and an oil container, wherein the oil container is arranged in the thermostatic container and is provided with an air intake pipe and an air outlet pipe; feeding the tested oil and a metal catalyst into the oil container; introducing air into the tested oil via the air intake pipe, wherein the flow of the air is 1 L/H to 20 L/H; measuring the temperature of the tested oil, orderly extracting samples from the tested oil according to a predetermined time sequence after the temperature of the tested oil is up to a set value, and measuring the viscosity, the acid value, the oxidation value and the nitration value of each sample; and measuring the content of an insoluble substance (n-pentane) of the remained oil in the oil container. Through the method, the samples can be sampled by many times during the testing process, so that a performance change trend of the oil is obtained; and the detergent dispersibility and the thermal oxidation stability of the oil can be evaluated.

An oil composition containing omega-9 canola oil is disclosed in which the canola oil is stabilized against oxidation. The omega-9 canola oil contains more than 68% oleic acid and less than 4% linolenic acid. In particular embodiments, the oil composition contains 0.1-1.0 weight percent omega-3 fatty acids, which may be DHA, and may contain additional anti-oxidants, such as tocopherols. Oxidatively resistant oil compositions and food compositions containing omega-9 canola oil with DHA are also disclosed. Methods for increasing the oxidative stability of omega-9 canola oil by addition of DHA are also disclosed.

The invention provides a method for preparing a phosphotungstate heteropolyacid ionic liquid and application of phosphotungstate heteropolyacid ionic liquid in diesel oxidative desulfurization. The ions in the ionic liquid comprise phosphotungstic acid anions having a Keggin structure and [C18H20N4O4]<+> organic cations and a catalyst has the general structure of 1,1'-[1,3-phenylenebis(methylene)]bis[3-(carboxymethyl)]-1H-imidazole dihydrogen phosphotungstate. The ionic liquid disclosed by the invention is used as an oil oxidation desulfurization catalyst and has the advantages of being small in usage amount, high in catalytic activity and fast in desulfurization speed and can be recycled and is easy to separate and the like.

The invention discloses a method for producing high quality coffee concentrated solution. The method comprises the following steps of raw bean baking, grinding, countercurrent cold extraction, filtration centrifugation, freeze concentration, CO2 filling, filling and cold storage. The product is rich in coffee aroma, mellow in taste, pure in flavor and good in stability. Low temperature non-thermal processing technologies and CO2 filling are effectively combined, and the low temperature non-thermal processing technologies such as countercurrent cold extraction and freeze concentration are adopted to process the coffee concentrated solution, so that volatile aroma and active ingredients of coffee can be stored completely. The CO2 filling technology is adopted to isolate oxygen to prevent oil oxidation in the coffee concentrated solution and oxidation browning of nutrient substances, growth and reproduction of microorganisms are restrained, and even the microorganisms die due to damage of growth conditions. The low temperature non-thermal processing technologies and the CO2 filling are effectively combined, so that not only is the high quality of the coffee concentrated solution guaranteed, but also the stability problem of the coffee concentrated solution is effectively solved, the guarantee period of the coffee concentrated solution is prolonged, and the industrial production of the coffee concentrated solution is achieved.

A sensor apparatus is disclosed that includes a testing chamber or testing chamber arrays configured to receive a sample of oil to be tested. A first embedded heater is coupled to the testing chamber or testing chamber arrays and configured to supply heat to the sample. An oxygen flux chamber is coupled to the testing chamber or testing chamber arrays and configured to provide a substantially stable oxygen flux to the testing chamber. A control module is coupled to the testing chamber, the first embedded heater, and the oxygen flux chamber. The control module is configured to monitor the temperature of the sample, direct the first embedded heater to supply heat to the sample, direct the oxygen flux chamber to provide oxygen flux to the testing chamber, measure an oxygen induction time (OIT), and evaluate the oxidation stability of the sample based on the OIT. A method for thermal analysis of oil oxidation stability is also disclosed.

A transducer used for measuring oxidation-stability of oil is prepared for arranging test chamber for receiving tested oil sample on said transducer, connecting embedded heater to test chamber for providing heat on said sample, connecting oxygen stream chamber to test chamber for providing stable oxygen stream to test chamber, connecting control module to test chamber and embedded heater as well as oxygen stream chamber for estimating out oxidation-stability of oil sample according to OIT. The heat-analyzing method of oil oxidation-stability is also disclosed.

The invention relates to a new method of desulfurization for oil products and solvent recovery, comprising the following steps of: oxidizing sulfide in the oil products by organic or inorganic peroxide, then compositing imidazole ionic liquid and alcohols or alcamines and alcohols derivate or alcamines derivate according to a definite proportion, which are used as desulfurizer, and extracting and removing the oxide of organic sulfur or inorganic sulfur in the oil products. At the same time, the added ironic liquid has the advantages of designable structure and polarity, so the new method can improve the desulfurization degree above 98 percent, after desulphurizinig heavy oil with higher boiling point, performing the solvent recovery by back-extracting alcohols, alcamines, ethers, nitriles with lower boiling point and the derivates of alcohols, alcamines, ethers and nitriles, while light oil with lower boiling point can perform the solvent recovery by means of reduced pressure distillation.

A method of inserting into a non-polar fluid flow a quantity of a solid medium having porosity, preferably a crosslinked polystyrene resin, which absorbs or adsorbs oil oxidation by-products or other lubricant degradation products or varnish precursors dramatically to extend the life and performance of the lubricating oil.

The fraction oil oxidizing and desulfurizing contains VIB, and VIII, IVB or VB metal oxide loaded onto porous acid carrier, and has VIB metal content 10-30 wt%, and VIII, IVB or VB metal content 1-8 wt%. The preparation process of the catalytic includes preformation of the transitional acid carrier, once soaking the carrier in the solution of the said metals, drying and roasting. The catalyst is used for the oxidation and desulfurization of sulfur containing hydrocarbon fraction oil in the presence of oxidant and alcohol, and is especially suitable for the oxidation and desulfurization process of light oil products.

The invention relates to strong anti-oxidation edible oil, which is health care edible oil for cooking, which is formed by taking astaxanthin as an anti-oxidation functional component and fully integrating with the edible oil and has the strong anti-oxidation function. The strong anti-oxidation edible oil belongs to the field of edible fats and oils. The edible oil is an indispensable nutrient for a human body. But all the edible oils do not have the anti-oxidation capacity, are very easy to be oxidized and thus cause adverse impacts on health. The oxidation in the air and the oxidation in the human body can promote the tumor occurrence and the development and are important factors for causing cardiovascular and cerebrovascular sclerosis. The edible oil is integrated with the astaxanthin, has strong anti-oxidation function and can prevent and reduce the oxidation of the edible oil, improve the quality and the safety, and ensure the safety and the health of the human body. The astaxanthin is the natural nutrient with strongest capability of preventing the oxidation and removing free radicals, which is 1000 times of that of VE and 10 times of carotene, and has a plurality of health care functions of enhancing immunity, preventing cancers, protecting heart and brain blood vessels, protecting skin, and preventing aging and the like. People need to eat less oil and eat good oil. The edible oil with the anti-oxidation function is the good oil.

A disclosed preparation method for tea-polyphenol-containing antioxidative soybean oil comprises the following steps: firstly adding phosphatide into absolute ethanol, heating with stirring to dissolve, then adding tea polyphenol, heating with stirring, and at the same time slowly heating and condensing for refluxing, and then drying a dissolved complex to obtain a tea-polyphenol phosphatide complex, and adding and dispersing the tea-polyphenol phosphatide complex into edible soybean oil, so as to prepare the tea-polyphenol-containing antioxidative soybean oil. Compared with common soybean oil products, the product has the advantages that the oil oxidation stability is enhanced, the lipid solubility of tea polyphenol is increased, the application scope of tea polyphenol to lipid-soluble products is expanded, and the like. The technology is simple, the employed raw materials are wide in source and low in price, and the preparation method has good application prospect.

The invention relates to a method and equipment for testing the detergency of marine medium-speed engine lubricating oil. The method includes: conducting high temperature oxidation and high temperature coking on heavy diesel-containing test oil, and blowing a sulfur dioxide gas, soot and exhaust gas to an oil film on a test panel during high temperature coking so as to make the test oil form a paint film and carbon deposit on the test panel rapidly. The test equipment mainly consists of an oil oxidation container, a gas supply system, a seal tester, a temperature controller, and an oil supply system. By utilizing the test method and equipment, the simulation test can reach a result equivalent to actual working conditions, detergency performance of the oil product can be truly reflected, the evaluation result is accurate, the test cycle is short, and the cost is low.

A supercritical extraction method of grape seed oil adopts cleaning, drying, crushing, supercritical extraction and molecular distillation, so the operating temperature is low, the heating time is short, and oil oxidation and rancidity induced by high temperature can be avoided, and the separation degree and the product yield are high; and molecular distillation also can reduce the acid value of oil, so efficient extraction, separation, no impurities and high purity of the extraction product are realized. The method has the advantages of simple operating technology, short extraction time, cost reduction and production efficiency improvement.

This invention discloses an oxidizing and desulfurizing method for fraction oil, which includes that a fraction oil raw material and hydrogen peroxide are reacted in a high effective mass transfer reactor with intensified onflow internal components, such as an impact flow reactor, the reactants in it can be mixed fully in short time and the reaction efficiency is increased obviously since the effective collision among molecules arises quick reaction and the reaction condition is more relax than ordinary beat up reactors when the same desulfurized result is got.

The invention discloses the method of diesel oil oxidation sweetening. The diesel oil and oxidant are reacted on the built catalyst when there is extractant. The built catalyst comprises the inorganic solid catalyst and strong acidic resin, whose proportion by weight is 10í†1-3í†1. The method is used for diesel oil desulfurizing process. In the method, the sulfur-containing organics are effectively oxygenized to become polar substance which is removed by separating. Comprared with now desalination technique, the said technology is mild, low cost and meets the marked demand of low-sulfur diesel oil.

A structure (200) for containing a volume of lubricant additive gel (10) which is disposed within a mechanical system, in close proximity to a wear critical surface, and which is configured to provide a release of the contained additives into a flow of lubricant over time or as a function of temperature in a site-specific manner to minimize wear or reduce oil oxidation due to harsh operating conditions. The structure defines a cage or capsule with screen or mesh sides (202) having multiple perforations or openings through which the flow of lubricant may circulate. Within the contained volume of the structure (200), additives are disposed in a gel matrix (10), and are release over time or as a function of temperature, through the perorations or openings, in close operative proximity to wear critical surfaces of the mechanical system such as a bearing assembly or gear arrangement.

The invention relates to an application method of an ionic liquid for removing sulfur from oils. The method comprises the following steps: dissolving chloroalkyl carboxylic acid solid in deionized water and adding pyridine, fully washing with ethyl acetate, carrying out vacuum drying on the synthesized product and then dissolving into the deionized water; slowly dropwise adding concentrated sulfuric acid or concentrated phosphoric acid so as to prepare a pyridine salt ionic liquid for the desulfuration of the oils; adding the ionic liquid and imitated oils containing the sulfur content of 1000ppm, stirring and heating; adding an aqueous hydrogen peroxide solution, cooling to room temperature, and standing for layering, wherein desulfured oils are on the upper layer, carrying out rotary evaporation and reextraction on the ionic liquid on the lower layer so as to respectively achieve dehydration and separation of sulfone compounds, and carrying out vacuum drying so that the ionic liquid can be recycled. By using the method, the defects that the ionic liquid is large in dosage, high in cost and is difficult to meet deep desulfuration are overcome. The method can be used for synthesizing functionalized pyridine salt ionic liquids and used for oil oxidation/extraction deep desulfuration, the dosage of an oxidant is less, desulfuration efficiency is high, the ionic liquid can be recycled, the yield of the oils is high, cost is low, and environment is not polluted.