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| Number | Title | Issue Date |
| 7422907 | Process for measuring mercury concentration within hydrocarbons A process for measuring the mercury concentration within a hydrocarbon is provided that enables the mercury concentration to be measured simply and quickly, and with good reliability and good reproducibility. A process for measuring the mercury concentration within ... | 09/09/2008 |
| 7419830 | Plural reaction chamber catalytic testing device and method for its use in catalyst testing A catalytic testing device comprising a reaction block comprising a set of reaction chambers, each chamber comprising a fluid inlet and outlet connected to an outgoing fluid duct connected to analysis means, fluid ... | 09/02/2008 |
| 7374942 | Process and apparatus for the combinatorial production and testing of catalyst material libraries by using at least two analytical methods A process and apparatus for testing material libraries, in particular catalysts, by means of coupled use of at least two analytical methods, preferably IR thermography and mass spectrometry. Owing to the selected arrangement, the disadvantages of the two previously ... | 05/20/2008 |
| 7172903 | Method for on-line monitoring of lubricating oil using light in the visible and near IR spectra Oil aging and particulate building in a lubricant other than one exposed to combustion products is monitored by detecting light transmitted through the lubricant at least one, and preferably, two or more preselected wavelengths over a pathlength greater than about 0... | 02/06/2007 |
| 7153694 | Quantitative method for hydrocarbon analysis A method for quantitative determination of hydrocarbon species in a hydrocarbon sample is disclosed. The method uses Townsend Discharge Nitric Oxide Chemical Ionization Gas Chromatography/Mass Spectrometry. ... | 12/26/2006 |
| 7052914 | Automated method for examining catalytic and spectroscopic properties of the components of combinatorial libraries The invention relates to an automated method for carrying out reactions with high spatial resolution on libraries of different materials and for analysis of the products obtained using a simple robot system and an analyzer, for example a mass spectrometer. ... | 05/30/2006 |
| 6904785 | Method by analysis by on-line chromatography for the polymerization of olefins A method for the analysis by on-line gas phase chromatography of a gaseous phase produced by an olefin polymerization process which includes carrying out a chromatographic analysis of a gaseous phase produced by an olefin polymerization process with carrier gases co... | 06/14/2005 |
| 6869803 | Method to quantitatively analyze conjugated dienes in hydrocarbon feeds and products as an indicator of fouling potential A method to quantify the conjugated dienes in a feedstream including the steps of dissolving 4-methyl-1,2,4-trazoline-3,5-dione (MTAD) in said feedstream, and determining the molar concentration of said conjugated dienes and/or the carbon number distribution of said... | 03/22/2005 |
| 6653142 | Automatic determination of the contamination of aqueous cleaning solutions with carbonaceous compounds A method of automatically determining the content of inorganic carbon and/or total organic carbon in an aqueous purifying solution wherein, in program-controlled manner, (a) a sample of a predetermined volume is taken from the aqueous purifying solution; ... | 11/25/2003 |
| 6642056 | Process for determining the stability of asphaltenes in live oil A process is described for determining the stability of asphaltenes in oil fields, which comprises the following steps: a) titrations of stock tank oil are carried out; the values measured are then used, together with physico-chemical analyses of the stock... | 11/04/2003 |
| 6599747 | Soil test A test for determining the bioavailable fraction of an organic pollutant present in soil comprises determining the fraction of the organic pollutant present in the soil which may be extracted by a cyclodextrin or derivative thereof.... | 07/29/2003 |
| 6419880 | Systems and methods for catalyst reactivation The invention includes systems and methods which allow reactivation of supported noble metal catalysts. The method involves heating the catalyst in the presence of a gaseous hydrocarbon in the absence of oxidizing agents. Systems of the invention provide ... | 07/16/2002 |
| 6420595 | Process control for vinyl acetate manufacture A method of real time process control in a reaction system for the production of vinyl acetate from the oxidation of ethylene and acetic acid. Reaction system samples are collected from the reactor vessel feed and/or effluent and/or from columns and/or tr... | 07/16/2002 |
| 6346420 | Method of analyzing a gas mixture to determine its explosibility and system for implementing a method of this kind In this method of analyzing a gas mixture containing at least one inflammable gas to determine its explosibility, a resistive heating element (15) is energized in an analysis enclosure (12) communicating with the gas mixture to be analysed to burn the gas... | 02/12/2002 |
| 6338824 | Method for detection of extremely low concentration An ultratrace detector system for hand-held gas chromatography having high sensitivity, for example, to emissions generated during production of weapons, biological compounds, drugs, etc. The detector system is insensitive to water, air, helium, argon, ox... | 01/15/2002 |
| 6207462 | Microwave apparatus and method for analysis of asphalt-aggregate compositions A method and apparatus are disclosed for analyzing the aggregate content of asphalt-aggregate compositions. The method includes placing a preheated, preweighed container carrying a sample of an asphalt-aggregate composition into a preheated furnace with t... | 03/27/2001 |
| 6190917 | Microwave apparatus and method for analysis of asphalt-aggregate compositions A method and apparatus are disclosed for analyzing asphalt-aggregate compositions. The method includes directing sufficient microwave radiation from a microwave source to a sample of an asphalt-aggregate composition to ignite the asphalt in the compositio... | 02/20/2001 |
| 6087181 | Sampling and detection of trace gas species by optical spectroscopy The present invention discloses a method for improving the speed and sensitivity of optical spectroscopic techniques for remote detection of trace chemical species in a carrier gas. The disclosed method can be applied to any optical spectroscopic detectio... | 07/11/2000 |
| 6051438 | Structural analysis and verification of structures of chemical compounds In the course of a method for the structural analysis of a chemical compound by data signals measured with the chemical compound being compared with calculated data, a first data signal is generated for at least one first compound having a structure which... | 04/18/2000 |
| 6046054 | Semiconducting oxide gas sensors The selectivity of response of resistive gas sensors to specific gases or vapors is improved by the selection of specified gas-sensitive materials which are not previously known for the applications described, which include detection of hydrocarbons in th... | 04/04/2000 |
| 5994145 | Reagents, methods and kits for detecting trichloroethylene and perchloroethylene Reagents, immunoassay methods, and kits for detecting the presence or amount of trichloroethylene or perchloroethylene in a sample. Reagents include antibodies, immunogens for preparing antibodies, and assay conjugates. The immunogens elicit high affinity... | 11/30/1999 |
| 5965451 | Use of a gas sensor for the selective detection of hydrocarbons in low-oxygen gases The invention provides a gas sensor for selective detection of hydrocarbons in low-oxygen gases, having a capacitive element and a gas-permeable sensitive layer as a dielectric. The sensitive layer is a precious-metal-doped zeolite which has a regular cry... | 10/12/1999 |
| 5948683 | Catalyst for selective oxidation of unsaturated hydrocarbons and methods of making and using the same A selective catalytic material is used to catalyze selective oxidation of unsaturated hydrocarbons, e.g., olefins, in the presence of carbon monoxide. The catalytic material comprises phosphated ceria containing from 0.1 to 20, preferably from 1 to 5, per... | 09/07/1999 |
| 5935863 | Cracking property determination and process control A method of determining or predicting a value Px of a property of a feed X to a steam cracking process or yield of said process, which method comprises measuring the absorption Dix of said material at more than one wavelength in the ... | 08/10/1999 |
| 5861228 | Cracking property determination An apparatus for on-line measuring physical property data of hydrocarbon products such as octane number, cetane number, density, vapour pressure and the like or gasoline/alcohol ratio, comprising means for providing (N)IR radiation in a predetermined spec... | 01/19/1999 |
| 5817517 | Method of characterizing feeds to catalytic cracking process units The present invention is a method to determine the chemical concentration of one or more of a number of the constituent classes of a feed to a catalytic cracking process. These constituent classes which are referred to as "lumps", include 14 different mol... | 10/06/1998 |
| 5766952 | Vapochromic platinum-complexes and salts The present invention relates to a process for indicating the presence of organic vapors comprising the steps of determining the color, absorption or emission spectra of a Pt--Pt double-complex salt of platinum or a neutral platinum complex in the absence... | 06/16/1998 |
| 5712165 | Method and apparatus for detecting hydrocarbon oxidation Systems and methods for material analysis are disclosed in which an organic sample (e.g., a foodstuff, tissue sample or petroleum product) is illuminated at a plurality of discrete wavelengths which are absorbed by fatty acid and fatty acid oxidation prod... | 01/27/1998 |
| 5652147 | Method of measuring concentration of polymerization inhibitor contained in fluorine-containing olefinic monomer and method of polymerizing fluorine-containing olefinic monomer comprising the measurement method There is provided a precisely quantitative measurement method of a hydrocarbonaceous polymerization inhibitor component in a fluorine-containing olefinic monomer, which inhibitor component is contained in the monomer in such a trace amount that it cannot ... | 07/29/1997 |
| 5599716 | Measurement of radioactive content of waste and plant items by radiolytic transformation of reactant gases A process for the measurement of the level of radioactivity of a solid by contacting the solid with a chemically stable reactant fluid. The reactant fluid is converted by nuclear radiation to a chemically stable product fluid to an extent dependent upon t... | 02/04/1997 |
| 5565172 | Hydraulic fluid vapor sensor A method and apparatus for detecting the presence of a vapor of an alkyl ester of phosphoric acid, particularly tributylphosphate, in ambient air. A sample of ambient air is heated to convert any alkyl ester of phosphoric acid to an alkene. The heated sam... | 10/15/1996 |
| 5451661 | Process for making lipid conjugates A process is described for generating conjugates of lipids and biologically active agents to produce compositions having therapeutic utility, such as drug delivery vehicles. The process involves mixing the reactive lipid with an appropriate amount of dike... | 09/19/1995 |
| 5342786 | Method for detecting a vapor of an alkyl ester of phosphoric acid in ambient air A method for detecting the presence of a vapor of an alkyl ester of phosphoric acid, particularly tributylphosphate, in ambient air. A sample of ambient air is heated to convert any alkyl ester of phosphoric acid to an alkene. The heated sample of air is ... | 08/30/1994 |
| 5308771 | Chemical sensors A device for detecting the presence or concentration of an analyte, a method of making the device, and a method of detecting the presence or concentration of an analyte. The invention features one or more supports, such as beads, which carry a thin film o... | 05/03/1994 |
| 5256574 | Method for selective detection of liquid phase hydrocarbons A method for the selective detection of liquid phase hydrocarbons in the C6 -C16 range includes a matrix comprising a silicone polymer having dispersed therein a conductive carbon black filler of high structure and comprises signalin... | 10/26/1993 |
| 5190882 | Method for quantitatively determining the amount of saturates, olefins, and aromatics in a mixture thereof A quantitative method including separating a mixture of olefins, aromatics, and saturates by supercritical fluid chromatography to obtain an eluent stream that over a first time period contains a mixture of olefins and saturates, and over a second time pe... | 03/02/1993 |
| 5106755 | Method of assessing gas odor intensity A method and apparatus for assessing the odor intensity of combustion gas produced from an internal combustion engine in which the odor intensity of combustion gas is obtained from the pH-value of an aqueous solution prepared from odor-producing substance... | 04/21/1992 |
| 5082789 | Bismuth molybdate gas sensor A bismuth molybdate gas sensor which provides stable sensitivity to gases such as alcohol, ketones, alkenes, and long chain alkanes is disclosed. Sensors comprising a mixture of the Bi2 Mo3 O12 and Bi2 MoO6... | 01/21/1992 |
| 5070024 | Hydrocarbon detector utilizing catalytic cracking A hydrocarbon gas detection system utilizes a heat chamber or oven to maintain the system at a temperature that will support cracking of hydrocarbon gases. A gas chamber which is located inside the oven is used to contain the flow of gases under analysis ... | 12/03/1991 |
| 5049509 | Chromatographic analyzer Methods and apparatus for analyzing a hydrocarbon sample are provided. The apparatus employs a highly polar column to separate the aromatics from non-aromatic components. The non-aromatic effluent from the highly polar column is passed to a 13X MSCOT colu... | 09/17/1991 |
