1837 results about "Oxidation stability" patented technology

A vegetable oil hydroconversion process is described for hydroconverting a mixture between 1 to 75% in mass of oil or natural fat (1) and the rest mineral oil (2), hydroconverted in a reactor (205) under conditions of pressure, temperature, hydrogen (flow 119) and sulfide catalyst of Groups VIII and VIB, obtaining, after sour water separation (flow 111) and rectification (flow 112), a specified diesel product (4). The product (4) has an ITQ/DCN (cetane number) higher than a product obtained from a pure mineral based oil would have, lower density than from a base oil and a plugging point depending on the mineral oil flow, as well as greater oxidation stability than the base oil.

To an organic substance having a double bond such as a polyunsaturated fatty acid was added an antioxidative component containing an antioxidative sesame component and ascorbic acid or an ascorbyl fatty acid ester. The above method provides a composition containing an organic substance having a double bond exhibiting enhanced oxidative stability. Particularly, it extremely improves oxidative stability of fat and oil which contains polyunsaturated fatty acid. General-purpose refined fish oil which is easy to handle can be provided for food, medicine or feed uses.

The present invention relates to biodiesel fuel compositions that have improved oxidation stability. More specifically, the biodiesel fuel compositions include at least one antioxidant that increases the oxidative stability of the fuel. The biodiesel fuel compositions may also include an antioxidant mixture, or an antioxidant mixture in combination with a polar and/or nonpolar solvent, that increases the oxidative stability of the fuel.

Oil produced from the seed of Brassica napus plant has an oleic acid content of 71.4-77.4% and a linoleic acid content of no more than 3%. The oil is useful in food and industrial applications. The oil has substantially improved oxidative stability relative to normal rapeseed oil, when both are identically treated with antioxidant.

The present invention provides a process for producing a saturated aliphatic hydrocarbon prepared using an α-olefin as a raw material and represented by the general formula (1), including the steps of: (I) producing a vinylidene olefin by dimerizing the α-olefin in the presence of a metallocene complex catalyst; (II) further dimerizing the vinylidene olefin in the presence of an acid catalyst; and (III) hydrogenating the obtained dimer. Further, there are provided a lubricant composition containing the saturated aliphatic hydrocarbon compound produced by the above process, a bearing oil consisting of the lubricant composition, and making use of the same, a bearing and gyral equipment. The saturated aliphatic hydrocarbon compounds produced by the process of the present invention have low-temperature fluidity, exhibiting low evaporativity, and excellent in thermal stability and oxidation stability. Thus, the saturated aliphatic hydrocarbon compounds are suitable for use as, for example, a base oil of lubricant composition for hydraulic pressure, turbine, working machine, bearing, gear, metal-working, etc.

The present invention provides a lubricating oil composition, which is capable to maintain sufficient low-friction (i.e. fuel saving performance) even when the lubricating oil is contaminated with soot and metal abrasion powder, which is excellent in durability with regard to anti-wear property and detergency, as well as oxidation stability, and which is capable to lower the ash content and to sufficiently maintain the performance of exhaust-gas after-treatment device for a long term. The lubricating oil composition comprises a lubricant base oil containing a base oil (X) of which % C_P is 70 or more, % C_A is 1 or less, viscosity index is 115 or more, and CCS viscosity at −35° C. is 3000 mPa·s or less, wherein the lubricant base oil, to total mass of the composition, contains following components (A)˜(D):

• (A) 0.01˜10 mass % of ashless friction modifier;
• (B) 0.01˜0.2 mass % of phosphorus-containing anti-wear agent as phosphorous content;
• (C) 0.01˜1 mass % of metallic detergent as metal content; and
• (D) 0.01˜0.4 mass % of ashless dispersant having 3000˜20000 of weight-average molecular weight as nitrogen content.

The present invention relates to blood products, and more particularly to compositions comprising a modified oxygenated hemoglobin having a high affinity for oxygen and methods for making such compositions. Such compositions according to the present invention have better stability to autooxidation and superior oxygen carrying characteristics.

An antioxidant composition having enhanced oxidative stability, emulsion stability, and health benefits. The composition may include individual ingredients or a synergistic blend of non-reducing sugars, sugar polyols, medium-chain triglycerides, polysaccharides, polyphenols, phospholipids, chitosan, and alpha-casein, beta-casein, kappa-casein or protein fragments, glycopeptides, phosphopeptides. The composition may optionally be further utilized for the prevention of hypercholesterolemia or bone mineral loss.

Branched, substantially unsaturated fatty alcohol sulfates are produced by a process which comprises the steps of: (a) dimerizing unsaturated C16-22 fatty acid to form a dimer fraction and a monomer fraction comprised of branched, substantially unsaturated fatty acids and straight chain saturated fatty acids, (b) removing the monomer fraction from the dimerization step, (c) converting the branched, substantially unsaturated fatty acids from step (b) into the corresponding fatty acid methyl esters, (d) hydrogenating the branched, substantially unsaturated fatty acid methyl esters with the double bonds intact to form the corresponding branched, substantially unsaturated fatty alcohols and (e) sulfating and neutralizing the branched, substantially unsaturated fatty alcohols. The fatty alcohol sulfates thus produced exhibit improved performance properties and greater oxidative stability than standard unsaturated fatty alcohol sulfates.

Cosmetic compositions containing organic sunscreens along with a 4-substituted resorcinol derivatives of general formula I exhibit improved storage stability and oxidative stability:

where each R₁ and R₂, independently, represents a hydrogen atom, —CO—R (acyl group), —COO—R CONHR; where R represents saturated or unsaturated, linear, branched or cyclic C₁-C₁₈ hydrocarbon groups; and

R₃ represents (1) an alkyl group, having from 1 to 18 carbon atoms, preferably having from 2 to 12 carbon atoms, with or without substitution of one or more hydrogen atoms of a linear alkyl group with a methyl or ethyl group; e.g., R₃ constitutes linear or branched chain alkyls, or (2) a group of the general formula formula (II)

Where X is preferably H, n is 0 to 3 and the dashed lines represents an optional double bond.

A lubricating oil composition for transmissions comprises a lubricating base oil comprising (A) a lubricating base oil so adjusted to have a kinematic viscosity at 100° C. of from 1.5 to 5 mm²/s and a % C_N of from 10 to 60 (B) a mineral lubricating base oil having a kinematic viscosity at 100° C. of from 10 to 50 mm²/s and a sulfur content of from 0.3 to 1 percent by mass and (C) a synthetic oil composed of carbon and hydrogen and having a number average molecular weight of from 2,000 to 20,000, in respective specific amounts and (D) an extreme pressure additive of from 0.05 to 2 percent by mass, based on the total amount of the composition, of comprising a phosphorus-based extreme pressure additive, a sulfur-based extreme pressure additive and/or a phosphorus-sulfur-based extreme pressure additive, wherein in the composition, the phosphorus content (P) is from 0.01 to 0.05 percent by mass, the total sulfur content (S) is from 0.05 to 0.3 percent by mass, and the P/S ratio is from 0.10 to 0.40. The lubricating oil composition has both excellent fuel economy performance and satisfactory durability for gears and bearings and furthermore excellent low temperature viscosity and oxidation stability.

The invention provides a method for preparing complex lithium grease, comprising: part of base oil is mixed with C12-C24 monobasic organic acid and at least one C4-C18 binary organic acid; the mixture is heated up to 80-120 DEG C and then added with lithium hydroxide aqueous solution for saponification reaction, and then moisture is removed; the temperature is risen to 130-180 DEG C for refining at the constant temperature, the rest base oil is added into the mixture to reduce the temperature, and the mixture is ground. The invention adopts lower refining temperature to prepare the complex lithium grease with high dropping point, so as to not only save the power resource, but also have the equivalent performances compared with the grease prepared by the prior art. Meanwhile, the method reduces the oxidation of lubricating oil when in the preparation process and improves the oxidation stability of the grease.

The invention relates to a strong anti-oxidation DHA microcapsule. The microcapsule comprises the following components in percentage by weight: 10 to 30 percent of DHA fish oil, 0.02 to 0.2 percent ofantioxidant, 10 to 60 percent of wall material, and 5 to 30 percent of auxiliary wall material 5. The invention also relates to a method for preparing the strong anti-oxidation DHA microcapsule. On the basis of the prior process, the microcapsule is prepared by adding the antioxidant to oil phase and water phase respectively and performing emulsification, high-pressure homogenization, improved spray granulation and cold-air boiling-drying. The newly added antioxidant can produce better anti-oxidation effects and greatly improve the oxidation stability of the DHA microcapsule so as to prolongthe shelf life of products, and the improved spray granulation and the cold-air boiling-drying process can increase the yield of the DHA microcapsule. The DHA microcapsule can be used in the fields ofmedicines, foods, beverages and the like.

A composition is disclosed that comprises a lubricant and at least a first antioxidant and a second antioxidant, the first antioxidant being a hindered phenolic and the second antioxidant being a thioether. Also disclosed is a method of increasing the oxidation stability of a lubricant comprising adding thereto at least a first antioxidant and a second antioxidant, the first antioxidant being a hindered phenolic and the second antioxidant being a thioether.

The invention relates to balanced-nutrition healthy edible blend oil with brain tonic efficacy. The balanced-nutrition healthy edible blend oil is prepared by adopting vegetable fat as a main raw material and adding seaweed oil which occupies 0.02-0.9 percent by weight of the edible blend oil. The edible blend oil contains omega-6 polyunsaturated fatty acid and omega-3 polyunsaturated fatty acid in a weight ratio of 4:1 to 6:1 and also comprises an additive of antioxidant which occupies 0-0.2 percent by weight of the edible blend oil. The invention has the advantages that the blend oil has balanced proportion of fatty acid, reasonable proportion of polyunsaturated fatty acid, natural anti-oxidation efficacy to human bodies and healthcare functions of promoting brain development and preventing diseases, such as cardiovascular diseases, and the like, improves the oxidation stability of the blend oil and reduces the fishy smell after the seaweed oil is added.

A lubricating oil (made from Group III base oil having a sequential number of carbon atoms) having a VI between 155 and 300, a RPVOT greater than 680 minutes, and a kinematic viscosity at 40° C. from 19.8 cSt to 748 cSt. A lubricating oil having a high VI and high RPVOT comprising: a) a Group III base oil with a sequential number of carbon atoms, and defined cycloparaffin composition or low traction coefficient, b) an antioxidant additive concentrate and c) no VI improver. A process comprising: a) hydroisomerization dewaxing of a waxy feed, b) fractionating the produced base oil, c) selecting a fraction having a VI greater than 150, and a high level of molecules with cycloparaffinic functionality or a low traction coefficient, and d) blending the fraction with an antioxidant additive concentrate. Also, a method of improving the oxidation stability of a lubricating oil.