NO20083614L - Proveplate for vaeskeanalyse i en raffineriprosess - Google Patents

Proveplate for vaeskeanalyse i en raffineriprosess

Info

Publication number
NO20083614L
NO20083614L NO20083614A NO20083614A NO20083614L NO 20083614 L NO20083614 L NO 20083614L NO 20083614 A NO20083614 A NO 20083614A NO 20083614 A NO20083614 A NO 20083614A NO 20083614 L NO20083614 L NO 20083614L
Authority
NO
Norway
Prior art keywords
fluid
component
reaction product
receiver
sample
Prior art date
Application number
NO20083614A
Other languages
English (en)
Norwegian (no)
Inventor
Michael Graham Hodges
Original Assignee
Bp Oil Int
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bp Oil Int filed Critical Bp Oil Int
Publication of NO20083614L publication Critical patent/NO20083614L/no

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01LCHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/50Containers for the purpose of retaining a material to be analysed, e.g. test tubes
    • B01L3/502Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
    • B01L3/5027Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
    • B01L3/502715Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip characterised by interfacing components, e.g. fluidic, electrical, optical or mechanical interfaces
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/26Oils; Viscous liquids; Paints; Inks
    • G01N33/28Oils, i.e. hydrocarbon liquids
    • G01N33/2823Raw oil, drilling fluid or polyphasic mixtures
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N35/00Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
    • G01N35/10Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
    • G01N35/1095Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices for supplying the samples to flow-through analysers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01LCHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2200/00Solutions for specific problems relating to chemical or physical laboratory apparatus
    • B01L2200/02Adapting objects or devices to another
    • B01L2200/025Align devices or objects to ensure defined positions relative to each other
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01LCHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2200/00Solutions for specific problems relating to chemical or physical laboratory apparatus
    • B01L2200/02Adapting objects or devices to another
    • B01L2200/026Fluid interfacing between devices or objects, e.g. connectors, inlet details
    • B01L2200/027Fluid interfacing between devices or objects, e.g. connectors, inlet details for microfluidic devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01LCHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2200/00Solutions for specific problems relating to chemical or physical laboratory apparatus
    • B01L2200/10Integrating sample preparation and analysis in single entity, e.g. lab-on-a-chip concept
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01LCHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00Additional constructional details
    • B01L2300/06Auxiliary integrated devices, integrated components
    • B01L2300/0627Sensor or part of a sensor is integrated
    • B01L2300/0645Electrodes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01LCHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00Additional constructional details
    • B01L2300/08Geometry, shape and general structure
    • B01L2300/0809Geometry, shape and general structure rectangular shaped
    • B01L2300/0816Cards, e.g. flat sample carriers usually with flow in two horizontal directions
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01LCHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2400/00Moving or stopping fluids
    • B01L2400/04Moving fluids with specific forces or mechanical means
    • B01L2400/0475Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure
    • B01L2400/0487Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure fluid pressure, pneumatics
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01LCHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L9/00Supporting devices; Holding devices
    • B01L9/52Supports specially adapted for flat sample carriers, e.g. for plates, slides, chips
    • B01L9/527Supports specially adapted for flat sample carriers, e.g. for plates, slides, chips for microfluidic devices, e.g. used for lab-on-a-chip
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/62Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
    • G01N27/622Ion mobility spectrometry
    • G01N27/624Differential mobility spectrometry [DMS]; Field asymmetric-waveform ion mobility spectrometry [FAIMS]
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/26Oils; Viscous liquids; Paints; Inks
    • G01N33/28Oils, i.e. hydrocarbon liquids
    • G01N33/2835Specific substances contained in the oils or fuels
    • G01N33/2876Total acid number
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T436/00Chemistry: analytical and immunological testing
    • Y10T436/21Hydrocarbon

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Immunology (AREA)
  • Engineering & Computer Science (AREA)
  • Pathology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Hematology (AREA)
  • Clinical Laboratory Science (AREA)
  • Dispersion Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
  • Optical Measuring Cells (AREA)
NO20083614A 2006-01-30 2008-08-21 Proveplate for vaeskeanalyse i en raffineriprosess NO20083614L (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06250495A EP1813348A1 (en) 2006-01-30 2006-01-30 Sample Plate for fluid analysis in a refinery process
PCT/GB2007/000127 WO2007085797A1 (en) 2006-01-30 2007-01-17 Sample plate for fluid analysis in a refinery process

Publications (1)

Publication Number Publication Date
NO20083614L true NO20083614L (no) 2008-10-17

Family

ID=36615730

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20083614A NO20083614L (no) 2006-01-30 2008-08-21 Proveplate for vaeskeanalyse i en raffineriprosess

Country Status (7)

Country Link
US (1) US8591814B2 (zh)
EP (2) EP1813348A1 (zh)
JP (1) JP5258580B2 (zh)
CN (1) CN101415497B (zh)
ES (1) ES2385360T3 (zh)
NO (1) NO20083614L (zh)
WO (1) WO2007085797A1 (zh)

Families Citing this family (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2009423A1 (en) * 2007-06-28 2008-12-31 Bp Oil International Limited Sample plate
EP2008716A1 (en) * 2007-06-28 2008-12-31 Bp Oil International Limited Sample plate
FR2945124B1 (fr) * 2009-04-29 2011-07-08 Burkert Werke Gmbh & Co Kg Procede et dispositif de mesure de la concentration d'un analyte dans un liquide echantillon
GB2474293B (en) 2009-10-12 2012-12-26 Microsaic Systems Plc Portable analytical system for on-site analysis of fluids
US9778240B2 (en) 2011-02-22 2017-10-03 Saudi Arabian Oil Company Characterization of crude oil by ultraviolet visible spectroscopy
US9103813B2 (en) * 2010-12-28 2015-08-11 Chevron U.S.A. Inc. Processes and systems for characterizing and blending refinery feedstocks
US9140679B2 (en) * 2010-12-28 2015-09-22 Chevron U.S.A. Inc. Process for characterizing corrosivity of refinery feedstocks
CA2818679A1 (en) * 2010-12-28 2012-07-05 Chevron U.S.A. Inc. Processes and systems for characterizing and blending refinery feedstocks
US10677718B2 (en) 2011-02-22 2020-06-09 Saudi Arabian Oil Company Characterization of crude oil by near infrared spectroscopy
US11022588B2 (en) 2011-02-22 2021-06-01 Saudi Arabian Oil Company Characterization of crude oil by simulated distillation
US10684239B2 (en) 2011-02-22 2020-06-16 Saudi Arabian Oil Company Characterization of crude oil by NMR spectroscopy
US10571452B2 (en) 2011-06-28 2020-02-25 Saudi Arabian Oil Company Characterization of crude oil by high pressure liquid chromatography
US10725013B2 (en) 2011-06-29 2020-07-28 Saudi Arabian Oil Company Characterization of crude oil by Fourier transform ion cyclotron resonance mass spectrometry
US9278351B2 (en) 2012-02-23 2016-03-08 Schlumberger Technology Corporation Apparatus and system for measuring asphaltene content of crude oil
WO2013130930A1 (en) * 2012-03-01 2013-09-06 Schlumberger Canada Limited Method and apparatus for determining asphaltene yield and flocculation point of crude oil
US20150087075A1 (en) * 2012-04-02 2015-03-26 Shell Oil Company Sulphur detection method and kit
US20130284913A1 (en) * 2012-04-30 2013-10-31 Baker Hughes Incorporated Process for Monitoring Industrial Fluids and Treatment of Same
US9377450B2 (en) * 2012-06-22 2016-06-28 Baker Hughes Incorporated Process for predicting the stability of crude oil and employing same in transporting and/or refining the crude oil
CN104661594B (zh) 2012-06-28 2017-10-13 迅捷有限责任公司 移动智能设备红外光测量装置、π方法及分析物质的系统
US9804076B2 (en) * 2013-03-13 2017-10-31 Baker Hughes, A Ge Company, Llc Use of detection techniques for contaminant and corrosion control in industrial processes
CN104406943B (zh) * 2014-11-26 2017-02-22 四川大学 激光诱导击穿光谱检测技术中液体样品的前处理方法
GB2533386B (en) 2014-12-18 2019-09-11 Smiths Detection Watford Ltd A detection apparatus with pneumatic interface
CN107250770B (zh) 2015-01-05 2020-08-21 沙特阿拉伯石油公司 通过近红外光谱法表征原油
EP3243065A1 (en) 2015-01-05 2017-11-15 Saudi Arabian Oil Company Characterizatin of crude oil by ultraviolet visible spectroscopy
SG11201705473XA (en) 2015-01-05 2017-08-30 Saudi Arabian Oil Co Relative valuation method for naphtha streams
CN107257918B (zh) 2015-01-05 2020-10-23 沙特阿拉伯石油公司 通过热重分析表征原油及其级分
US10711668B2 (en) * 2016-01-25 2020-07-14 Ford Global Technologies, Llc Lubrication system monitoring assembly and method
US10696906B2 (en) 2017-09-29 2020-06-30 Marathon Petroleum Company Lp Tower bottoms coke catching device
CN111918721A (zh) * 2018-04-06 2020-11-10 勃林格殷格翰维特梅迪卡有限公司 用于测试样品的分析设备、盒、分析系统和方法
CN108303410B (zh) * 2018-04-23 2023-06-23 南京信息工程大学 痕量元素及其同位素自动检测系统
GB201810589D0 (en) * 2018-06-28 2018-08-15 Rab Microfluidics Res And Development Company Limited Method and apparatus for oil condition monitoring
US12000720B2 (en) 2018-09-10 2024-06-04 Marathon Petroleum Company Lp Product inventory monitoring
US11975316B2 (en) 2019-05-09 2024-05-07 Marathon Petroleum Company Lp Methods and reforming systems for re-dispersing platinum on reforming catalyst
CA3109675A1 (en) 2020-02-19 2021-08-19 Marathon Petroleum Company Lp Low sulfur fuel oil blends for stability enhancement and associated methods
US11905468B2 (en) 2021-02-25 2024-02-20 Marathon Petroleum Company Lp Assemblies and methods for enhancing control of fluid catalytic cracking (FCC) processes using spectroscopic analyzers
US11898109B2 (en) 2021-02-25 2024-02-13 Marathon Petroleum Company Lp Assemblies and methods for enhancing control of hydrotreating and fluid catalytic cracking (FCC) processes using spectroscopic analyzers
US20220268694A1 (en) 2021-02-25 2022-08-25 Marathon Petroleum Company Lp Methods and assemblies for determining and using standardized spectral responses for calibration of spectroscopic analyzers
US11702600B2 (en) 2021-02-25 2023-07-18 Marathon Petroleum Company Lp Assemblies and methods for enhancing fluid catalytic cracking (FCC) processes during the FCC process using spectroscopic analyzers
US11692141B2 (en) 2021-10-10 2023-07-04 Marathon Petroleum Company Lp Methods and systems for enhancing processing of hydrocarbons in a fluid catalytic cracking unit using a renewable additive
US20230149921A1 (en) * 2021-11-18 2023-05-18 Saudi Arabian Oil Company Microfluidic System for Diesel Detection
CA3188122A1 (en) 2022-01-31 2023-07-31 Marathon Petroleum Company Lp Systems and methods for reducing rendered fats pour point
US11913332B2 (en) 2022-02-28 2024-02-27 Saudi Arabian Oil Company Method to prepare virtual assay using fourier transform infrared spectroscopy
US11781988B2 (en) 2022-02-28 2023-10-10 Saudi Arabian Oil Company Method to prepare virtual assay using fluorescence spectroscopy
CN114689824A (zh) * 2022-03-25 2022-07-01 潍柴动力股份有限公司 汽车用油的硫含量的在线检测方法以及检测装置
GB2625124A (en) * 2022-12-07 2024-06-12 Airbus Operations Ltd Aircraft refuelling system

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3996786A (en) * 1975-12-29 1976-12-14 Texaco Inc. Means for on-line determination of boiling point properties of crude oil
US5133937A (en) * 1989-06-01 1992-07-28 Iniziative Marittime, 1991 S.R.L. Analysis system having a removable reaction cartridge and temperature control
US5449603A (en) * 1989-10-24 1995-09-12 Stratagene Method for hybridizing nucleic acids using single-stranded nucleic acid binding protein
US5827952A (en) 1996-03-26 1998-10-27 Sandia National Laboratories Method of and apparatus for determining deposition-point temperature
US5661233A (en) 1996-03-26 1997-08-26 Sandia Corporation Acoustic-wave sensor apparatus for analyzing a petroleum-based composition and sensing solidification of constituents therein
SE515424C2 (sv) * 1997-07-01 2001-07-30 Boule Medical Ab Engångs provtagningsanordning för en partikelräknare
US6137501A (en) * 1997-09-19 2000-10-24 Eastman Kodak Company Addressing circuitry for microfluidic printing apparatus
DE19917398C2 (de) * 1999-04-16 2002-06-20 Accoris Gmbh Modulares chemisches Mikrosystem
US6270641B1 (en) * 1999-04-26 2001-08-07 Sandia Corporation Method and apparatus for reducing sample dispersion in turns and junctions of microchannel systems
US7641856B2 (en) * 2004-05-14 2010-01-05 Honeywell International Inc. Portable sample analyzer with removable cartridge
CA2314398A1 (en) * 2000-08-10 2002-02-10 Edward Shipwash Microarrays and microsystems for amino acid analysis and protein sequencing
WO2002025243A1 (en) * 2000-09-21 2002-03-28 Dna Sciences, Inc. Sample injector system and method
DK1258720T3 (da) * 2001-05-15 2007-11-12 Sysmex Corp Måleenhed og roterende ventil til anvendelse deri
JP2003098181A (ja) * 2001-05-15 2003-04-03 Sysmex Corp 測定ユニットとそれに用いる回転バルブ
JP4009105B2 (ja) * 2001-12-27 2007-11-14 シスメックス株式会社 試料分析装置と測定ユニットおよびそれらを用いた試料分析システム
US20030027225A1 (en) * 2001-07-13 2003-02-06 Caliper Technologies Corp. Microfluidic devices and systems for separating components of a mixture
JP2003057252A (ja) * 2001-08-17 2003-02-26 Horiba Ltd マルチスタックマイクロ分析計
US20030072682A1 (en) * 2001-10-11 2003-04-17 Dan Kikinis Method and apparatus for performing biochemical testing in a microenvironment
US6662116B2 (en) 2001-11-30 2003-12-09 Exxonmobile Research And Engineering Company Method for analyzing an unknown material as a blend of known materials calculated so as to match certain analytical data and predicting properties of the unknown based on the calculated blend
US7452507B2 (en) * 2002-08-02 2008-11-18 Sandia Corporation Portable apparatus for separating sample and detecting target analytes
AU2003304163A1 (en) * 2002-08-21 2005-01-21 Shell Oil Company Method for measuring fluid chemistry in drilling and production operations
US20040224422A1 (en) * 2002-09-27 2004-11-11 Ulrich Bonne Phased micro analyzer III, IIIA
US7270784B2 (en) * 2003-04-30 2007-09-18 Aurora Discovery, Incorporated Automated laboratory for high-throughput biological assays and RNA interference
CA2479452C (en) * 2003-08-30 2008-11-04 F.Hoffmann-La Roche Ag Method and device for determining analytes in a liquid
WO2005068970A1 (ja) * 2004-01-14 2005-07-28 Kyoto Electronics Manufacturing Co., Ltd. サンプリング装置

Also Published As

Publication number Publication date
US8591814B2 (en) 2013-11-26
JP5258580B2 (ja) 2013-08-07
EP1813348A1 (en) 2007-08-01
ES2385360T3 (es) 2012-07-23
WO2007085797A1 (en) 2007-08-02
JP2009525465A (ja) 2009-07-09
US20090011517A1 (en) 2009-01-08
EP1979095B1 (en) 2012-06-06
CN101415497A (zh) 2009-04-22
CN101415497B (zh) 2013-06-19
EP1979095A1 (en) 2008-10-15

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