62results about "Petroleum industry" patented technology

The present spin finish composition comprises at least about 10 percent by weight based on the spin finish composition of components (a) and (b) having the formula R1—(CO)x—O—(CH(R2)—CH2—O)y—(CO)z—R3 wherein each of R1 and R3 is selected from the group consisting of hydrogen or an alkyl group having from one to 22 carbon atoms or an alkylene hydroxy group having from one to 22 carbon atoms, x is zero or one, R2 may vary within component (a) or component (b) and is selected from the group consisting of hydrogen or an alkyl group having from one to four carbon atoms, y is zero, or from one to 25, and z is zero or one, in component (a), x and z are equal to zero and the average molecular weight of component (a) is less than or equal to 1,900 and if R2 varies, component (a) is a random copolymer; and in component (b), at least x or z is equal to one or component (b) is a complex polyoxyethylene glyceride-containing compound having greater than 10 polyoxyethylene units; up to about five percent by weight based on the spin finish composition of component (c) of an ethoxylated silicone; and at least about one percent by weight based on the spin finish composition of component (d) having the formula R4(CH2O(CO)aR5)b wherein R4 is —C— or —COC—; a is 0 or 1; R5 is —H; from —CH3 to —C18H37; or —CH(R6)—CH2O; b is 4 or 6; and R6 is —H or —CH3 or —H and —CH3 in a ratio of 10:90 to 90:10. The present spin finish composition may be used on industrial yarn.

The reaction of N-alkylimidazol with alkyl sulfonates, at room temperature, favors the production of 1,3-dialkylimidazolium alkane-sulfonates as crystalline solids at high yields. The alkane-sulfonate anions may be easily substituted by a series of other anions [BF4, PF6, PF3(CF2CF3)3, CF3SO3 and (CF3SO2)2N] through simple anion, salt, or acid reactions in water at room temperature. The extraction with dichloromethane, filtration, and evaporation of the solvent, allows the production of the desired ionic liquids at a yield of 80-95%. The purity of these ionic liquids (in some cases >99.4%) is performed using the intensity of 13C satellite signals from the magnetic resonance spectrums of the N-methyl imidazolium group as an internal standard.

The invention provides ionic liquids and processes for their preparation. The liquids may either comprise a cation of the formula (I); N+HR1R2R3 (I) wherein R1 is a group —R4—O—R5; R2 and R3 are each independently either hydrogen or hydrocarbyl, R2 and R3 may be joined together with the N to form a heterocyclic group; R4 is a divalent hydrocarbyl radical; and R5 is hydrocarbyl; or a cation of the formula (II), N+HR6R7R8 (II) wherein R6 is an alkanolyl group; R7 is a hydrocarbyl group; and R8 is either hydrogen or hydrocarbyl, or R7 and R8 may be joined together with the N to form a heterocyclic group.

A box protector 21 for protecting the inner surface of a box 11 of a threaded joint for pipes having a female threaded portion and a shoulder surface 14 with the shoulder surface being sloped by an angle θ with respect to the direction perpendicular to the pipe axis has a male threaded portion 22 which threadingly engages with at least a portion of the complete threads of the female threaded portion of the box and a shoulder surface 21b which sealingly contacts the shoulder surface 14 of the box to form a first seal portion, and the shoulder surface 21b is sloped by an angle θP (θP>θ) with respect to the direction perpendicular to the pipe axis. The protector has a circumferential groove 30 in its outer peripheral surface in the vicinity of the shoulder surface 21b and an elastic seal ring 28 which contacts the shoulder surface 14 of the box 11 and forms a second seal portion.

The invention relates to a method and device for compressing a gaseous medium, particularly hydrogen. According to the invention, the compressing (Z1, Z2) of the gaseous medium ensues by using a liquid (D). The liquid (D) used is one in which the gaseous medium does not dissolve and / or one that can be separated from the gaseous medium without residues. To this end, the liquid (D) used is an ionic liquid, a high-boiling hydraulic oil or a liquid having a very low vapor pressure.

The invention pertains to heat transfer compositions, particularly to automobile refrigerants comprising a hydrofluoroalkene, an iodocarbon, and at least one lubricant having hydrogen atoms and carbon atoms, wherein no more than 17% of the total number of hydrogen atoms which are attached to a carbon atom are tertiary hydrogen atoms.

In the present invention, in order to provide a fluid dynamic bearing, having heat resistance, wherein the electrical charging on a rotation portion is prevented and the torque loss caused by a lubricant is made lower, an ionic liquid or the like is added to the lubricant filled in the clearance between the opposed faces of a shaft and a sleeve unit as an electrical conductivity imparting agent.

An oil-in-water emulsion composition for a die casting release agent, the oil-in-water emulsion composition comprising: (A) an organopolysiloxane having an average chemical composition represented by the general formula (1); (B) silica particles; and (C) water, R1 aSiO(4 - a) / 2 (1) in the formula (1), -R1s in a molecule may be the same or different, each R1 is a group selected from a substituted or unsubstituted, saturated or unsaturated monovalent hydrocarbon group having 1 to 25 carbon atoms, a substituted or unsubstituted aromatic group having 6 to 30 carbon atoms, a hydroxyl group, an alkoxy group having 1 to 6 carbon atoms, and a hydrogen atom, and -a is 1.5 to 2.5.

A coated substrate and a process for forming the coated substrate, including a first lubricious coating layer overlying the substrate, the first lubricious coating layer including a first lubricant providing to the first lubricious coating layer a first coefficient of friction; and a second lubricious coating layer overlying the first lubricious coating layer, the second lubricious coating layer including a second lubricant providing to the second lubricious coating layer a second coefficient of friction, in which the second coefficient of friction is greater than the first coefficient of friction.

Methods and systems for withdrawing a stream from a linear programming model of a manufacturing facility. In one embodiment, one or more independent input variables and one or more key output variables are specified within the linear programming model. A stream within the model to be at least partially withdrawn is identified, and a stream is preferably added to the model immediately downstream of the withdrawal point. The added stream has one or more component rates that are perturbed. The one or more key output variables are solved in response to the perturbation of the component rates to create a derivative for the perturbed component rates. The derivatives are negated, and an amount of withdrawal for the identified stream is specified. The resulting component rates of the stream to be at least partially withdrawn can be determined based on the specified amount of withdrawal and the negated derivatives to simulate an effect on the one or more key output variables.

A protector which prevents damage to a solid lubricating coating on a threaded portion of a threaded joint when the protector is mounted on a pin or a box of a threaded joint for pipes in which at least one of the pin or the box is lubricated with a solid lubricating coating comprises a tubular member having a threaded portion on its inner or outer peripheral surface which threadingly engages with at least a portion and preferably 3-5 complete threads of the threaded portion provided on the pin or the box to be protected. The thread height H1 of the threaded portion of the protector and the thread height H2 of the complete thread of the pin or the box on which the protector is mounted satisfy H1>H2, and the difference between H1 and H2 [=H1−H2] is larger than the maximum coating thickness at the thread crest of the solid lubricating coating which covers the threaded portion of the pin or the box.

A slide member of the present invention is used in a slide unit which is included in a refrigerant compressor for compressing a refrigerant and provided inside a sealed container which reserves lubricating oil therein. The slide member is provided with an oxide coating film on a surface of a base material. The oxide coating film is configured such that (1) when the base material comprises an iron based material, the oxide coating film has a three-layer structure including a first layer comprising Fe2O3, a second layer comprising Fe3O4, and a third layer comprising FeO in this order from an outermost surface, (2) the oxide coating film has a dense structure having minute concave / convex portions with a height difference which falls within a range of 0.01 μm to 0.1 μm, or (3) when the base material comprises the iron based material, the oxide coating film has a three-layer structure in which the three layers comprise the iron oxides and are different in hardness.