Abstract: The present invention concerns an analytical method that makes use of an oxygen-containing source having a predetermined content of an isotope of oxygen ZO, which is not the same as natural composition and distribution of oxygen isotopes, to detect and/or quantify oxygen in oxidizable compound(s). The analytical method allows detecting and/or quantification with relatively high precision and accuracy oxygen in oxidizable compound(s), even at low content. The method is easy to implement and can be used for in-line analysis.

Abstract: The present invention relates to the use of a lubricating composition comprising: —at least one base oil; and—at least one monoester which is separate from the base oil and formed between a linear, saturated or unsaturated C8-C14 monocarboxylic acid, and a branched, saturated or unsaturated C4-C16 monoalcohol to reduce the fuel consumption of a vehicle fitted with a transmission member, in particular a gearbox and/or an axle, which is lubricated by means of said composition.

Abstract: A device for measuring the flocculation threshold of a colloidal medium, and a method for measuring the flocculation threshold of a colloidal medium by the addition of aliphatic solvent using the device, including the step of determining the flocculation after the addition of the amount of aliphatic solvent necessary for flocculation.

Abstract: A device for measuring the flocculation threshold of a colloidal medium by varying the intensity of the luminous flux, and a method for measuring the flocculation threshold of a colloidal medium by the addition of aliphatic solvent using the device, including the step of determining the flocculation after the addition of the amount of aliphatic solvent necessary for flocculation.

Abstract: The invention is a process for producing a white oil having an initial boiling point of at least 300° C., the process comprising a step of catalytically hydrogenating a hydrocarbon feedstock at a temperature of from 80 to 190° C., at a pressure of from 50 to 160 bars, a liquid hourly space velocity of 0.2 to 5 hr?1 and an hydrogen treat rate up to 200 Nm3/ton of feed, the hydrocarbon feedstock having a sulphur content of less than 10 ppm by weight, an initial boiling point within the range from 150 to 350° C. and a final boiling point within the range from 350 to 550° C.

Abstract: The invention relates to a method for the preparation of estolide esters from a hydroxycarboxylic acid by a reaction of addition of a fatty acid to the hydroxyl function and by a reaction of esterification of the carboxylic acid function with an alcohol. The invention further relates to the use of estolide esters as a base oil in a lubricating composition or as an emollient in a cosmetic or pharmaceutical composition.

Abstract: A lubricating oil additive composition comprising at least one organomolybdenum compound and at least one 2,5-dimercapto-1,3,4-thiadiazole alkyl polycarboxylate compound.

Abstract: A composition includes (a) a hydrocarbon fluid comprising less than 1000 ppm by weight of aromatics, a weight ratio normal paraffins/isoparaffins ranging from 0.2 to 1.0 and having an initial boiling point and a final boiling point in the range from 265° C. to 380° C., and (b) a copolymer derived from alpha-olefin monomers and vinyl acetate type monomers and optionally acrylate type monomers.

Abstract: The present disclosure relates to a process for converting one or more methyl halides to acyclic C3-C6 olefins, said process comprising the steps of (a) providing a feedstream comprising one or more methyl halides; (b) providing a catalyst composition; and (c) contacting said feedstream with said catalyst composition under reaction conditions. The process is remarkable in that said reaction conditions include a reaction temperature below 400° C., and in that said catalyst composition comprises one or more molecular sieves with a Si/Al atomic ratio ranging from 2 to 18 and wherein said one or more molecular sieves comprise a plurality of pores, wherein said pores have a shape of an 8-membered ring or less.

Abstract: The invention relates to a process and an installation to produce a monovinylaromatic polymer (3) comprising post-consumer recycled polystyrene (PCR-PS) wherein the process comprises the steps of mixing the PCR-PS (5) and the monovinylaromatic monomer (7) within a dissolver (9) to dissolve the PCR-PS (5) in the monovinylaromatic monomer (7) so as to produce a polymerization mixture (13); and a step of filtering the polymerization mixture (13) that includes continuously redirecting at least a part of the stream of the filtered polymerization mixture (17) back to the dissolver (9) and mixing it with the polymerization mixture (13) so as to continuously reduce the content of insoluble material in the polymerization mixture (13) contained in the dissolver (9).

Abstract: This method comprises: obtaining first data representative of amounts of a first gas and second data representative of amounts of a second tracer gas emitted by the source together with the first gas, calculating at least one coefficient of correlation between the amounts of the first gas and the amounts of the second gas from the first representative data and the second representative data; obtaining a measured or computed flow of the second gas emitted by the source; computing a flow of the first gas emitted by the source on the basis of the measured or computed flow of the second gas emitted by the source and the correlation coefficient.

Abstract: A solar power generation assembly includes a first canopy wing positioned at a first predetermined inclination and a second canopy wing positioned at a second predetermined inclination, wherein the first and second canopies form a dual-incline structure and a main gutter is disposed between the first and second canopies. Additionally, at least one mounting rail gutter extends perpendicular to the main gutter and a secondary gutter extends parallel to the main gutter, wherein the secondary gutter directs precipitation to the mounting rail gutter and the mounting rail gutter directs precipitation into the main gutter, wherein the secondary gutter, the mounting rail gutter, and the main gutter are configured to provide both mounting and precipitation management functionality to the solar power generation assembly.

Abstract: The present invention relates to a process for polymerising lactide into polylactic acid. The present invention also relates to reactor configuration for polymerising lactide into polylactic acid.

Abstract: The present invention relates to method for assessing the H2S release capacity of a liquid sample containing one or more sulfur compounds which are able to be degraded into gaseous H2S with temperature. The method comprising: a) Placing a volume of the liquid sample in a purge vessel so as to obtain a liquid phase and a gaseous phase in a flask; b) Purging the gaseous phase with an inert gas stream for a determined period of time; e) Passing the purged gaseous phase through a H2S trap; d) Recovering H2S from the H2S trap; and e) Dosing the recovered H2S. The invention is also used in a method for selecting a liquid sample, in particular among a group of different liquid samples.

Abstract: A guanidinium-based ionic liquid compound including a 1,1,3,3-tetramethylguanidinium cation and an alcoholate anion. A lubricant composition including it, and its use as a detergent and as anti-corrosion additive in a lubricant composition, in particular a marine lubricant.

Abstract: A composition for scavenging hydrogen sulphide and/or mercaptans in hydrocarbon streams includes a H2S scavenger selected from oxazolidine compounds, triazine and metal-based carboxylate compounds, and a synergistic additive allowing boosting the effect of the H2S scavenger compound.

Abstract: The present invention relates to a lubricating composition comprising at least one base oil and at least one additive chosen from anti-wear additives, extreme pressure additives, antioxidants, anti-corrosion additives, metal deactivator additives, anti-foam agents, dispersants and mixtures thereof, said composition having a boron concentration less than or equal to 100 ppm by weight and a nitrogen concentration strictly greater than 100 ppm by weight and less than or equal to 500 ppm by weight, with respect to the total weight of the lubricating composition.

Abstract: An ammonium-based ionic liquid compound including a tri-n-octylmethylammonium cation and a carboxylate anion. A lubricant composition including it, and its use as a detergent and/or anti-corrosion additive in a lubricant, in particular a marine lubricant.

Abstract: This method comprises the following steps retrieving data about amounts of at least one gas, said data being measured in the atmosphere at a distance from the source along a plurality of lines parallel to a first direction; integrating the amounts read on each line in the first direction in order to obtain an integrated overall amount on each line; integrating the product of the integrated overall amounts on each line and a wind speed present on the line in a second direction perpendicular to the first direction, in order to obtain a raw flow of gas; determining the flow of gas emitted by the source based on the raw flow of gas.

Abstract: The present disclosure relates to a novel staged-synthesis method for introduction of various metals in the structure of zeolite frameworks by isomorphous substitution. This new method is based on a hydrothermal synthesis in which the metal addition to the precursor suspensions (gel) is delayed. This so-called “staged-synthesis method” allows to obtain nanosized silanol highly homo-geneous crystalline zeolite structures with a control of the metal location.