[go: up one dir, main page]

AR000266A1 - Un método para formar un gel en al menos una partede una formación subterranea - Google Patents

Un método para formar un gel en al menos una partede una formación subterranea

Info

Publication number
AR000266A1
AR000266A1 AR33439895A AR33439895A AR000266A1 AR 000266 A1 AR000266 A1 AR 000266A1 AR 33439895 A AR33439895 A AR 33439895A AR 33439895 A AR33439895 A AR 33439895A AR 000266 A1 AR000266 A1 AR 000266A1
Authority
AR
Argentina
Prior art keywords
underground formation
polymer
injecting
composition
acryloamide
Prior art date
Application number
AR33439895A
Other languages
English (en)
Inventor
Richard D Hutchens
Hoai T Dovan
Burton B Sandiford
Original Assignee
Union Oil Co
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 Union Oil Co filed Critical Union Oil Co
Publication of AR000266A1 publication Critical patent/AR000266A1/es

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60—Compositions for stimulating production by acting on the underground formation
    • C09K8/84—Compositions based on water or polar solvents
    • C09K8/86—Compositions based on water or polar solvents containing organic compounds
    • C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
    • C09K8/887—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
    • B01J13/0052—Preparation of gels
    • B01J13/0065—Preparation of gels containing an organic phase
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F8/00—Chemical modification by after-treatment
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
    • C09K8/504—Compositions based on water or polar solvents
    • C09K8/506—Compositions based on water or polar solvents containing organic compounds
    • C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
    • C09K8/512—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60—Compositions for stimulating production by acting on the underground formation
    • C09K8/62—Compositions for forming crevices or fractures
    • C09K8/66—Compositions based on water or polar solvents
    • C09K8/68—Compositions based on water or polar solvents containing organic compounds
    • C09K8/685—Compositions based on water or polar solvents containing organic compounds containing cross-linking agents
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60—Compositions for stimulating production by acting on the underground formation
    • C09K8/92—Compositions for stimulating production by acting on the underground formation characterised by their form or by the form of their components, e.g. encapsulated material
    • C09K8/94—Foams
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2800/00—Copolymer characterised by the proportions of the comonomers expressed
    • C08F2800/10—Copolymer characterised by the proportions of the comonomers expressed as molar percentages
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2800/00—Copolymer characterised by the proportions of the comonomers expressed
    • C08F2800/20—Copolymer characterised by the proportions of the comonomers expressed as weight or mass percentages
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S507/00—Earth boring, well treating, and oil field chemistry
    • Y10S507/903—Crosslinked resin or polymer
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S524/00—Synthetic resins or natural rubbers -- part of the class 520 series
    • Y10S524/916—Hydrogel compositions

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Dispersion Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

El método comprende las etapas de (A) inyectar una composición dentro de al menos una parte de una formación subterránea, comprendiendo la composición (i)agua e (ii) un polímero de enlace cruzado, soluble en agua, (B) inyectar un agente de enlacecruzado dentro de al menos una parte de la formaciónsubterránea, realizándose las etapas (A) y (B) sea separada o simultáneamente, o como etapa única que comprende inyectar una mezcla que contiene lacomposición y el agente de enlace cruzado en porlo menos parte de la formación subterránea, y se caracteriza porque el polímero consta (Ó) de unaunidad de acriloamida de fórmula (I) y (ß) de una unidad catiónica de fórmula (II), en la cual Z es un anión, R1 y R2 son seleccionados independientementedel grupo que consiste de hidrógeno y de grupos alquilo que contienen de 1 a 10 átomos de carbono; la fracción mol de las unidades acriloamida presentes en elpolímero es inferior a 0,5, y la fracción mol de las unidades catiónicaspresentes en el polímero es al menos 0,5; con tal que la suma total de estasfracciones mol sea 1. El sistema de recuperación usa el gel formado por el método.
AR33439895A 1994-11-30 1995-11-28 Un método para formar un gel en al menos una partede una formación subterranea AR000266A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/346,679 US5957203A (en) 1992-08-31 1994-11-30 Ultra-high temperature stable gels

Publications (1)

Publication Number Publication Date
AR000266A1 true AR000266A1 (es) 1997-06-18

Family

ID=23360546

Family Applications (1)

Application Number Title Priority Date Filing Date
AR33439895A AR000266A1 (es) 1994-11-30 1995-11-28 Un método para formar un gel en al menos una partede una formación subterranea

Country Status (5)

Country Link
US (2) US5957203A (es)
AR (1) AR000266A1 (es)
AU (1) AU4242196A (es)
CO (1) CO4440491A1 (es)
WO (1) WO1996017154A1 (es)

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2757426B1 (fr) * 1996-12-19 1999-01-29 Inst Francais Du Petrole Composition moussante a base d'eau - procede de fabrication
US5881826A (en) 1997-02-13 1999-03-16 Actisystems, Inc. Aphron-containing well drilling and servicing fluids
SE511857C2 (sv) * 1998-04-28 1999-12-06 Sca Hygiene Prod Ab Absorberande struktur med förbättrade absorptionsegenskaper innehållande minst 50 vikts% superabsorberande material
US6355600B1 (en) * 1998-10-01 2002-03-12 Baker Hughes Incorporated Shale stabilizing drilling fluids comprising calcium chloride and low molecular weight low charge cationicpolyacrylamide copolymers
WO2000027944A1 (en) 1998-11-06 2000-05-18 Baker Hughes Incorporated Drilling fluid systems with improved fluid loss properties
US6607035B1 (en) * 1998-12-04 2003-08-19 Halliburton Energy Services, Inc. Preventing flow through subterranean zones
US6176315B1 (en) * 1998-12-04 2001-01-23 Halliburton Energy Services, Inc. Preventing flow through subterranean zones
US6025304A (en) * 1998-12-15 2000-02-15 Marathon Oil Company Permeability or fluid mobility reduction treatment for a hydrocarbon-bearing formation using a dual molecular weight polymer gel
US6189615B1 (en) * 1998-12-15 2001-02-20 Marathon Oil Company Application of a stabilized polymer gel to an alkaline treatment region for improved hydrocarbon recovery
US6166103A (en) * 1998-12-21 2000-12-26 Atlantic Richfield Company Aqueous gelable compositions with delayed gelling times
US6855671B2 (en) * 1999-10-01 2005-02-15 Baker Hughes Incorporated Water based fluids comprising multivalent salts and low molecular weight, low charge cationic polyacrylamide copolymers
US7439209B2 (en) 1999-11-05 2008-10-21 Baker Hughes Incorporated Drilling fluid systems with improved fluid loss properties
AU2381901A (en) * 1999-12-29 2001-07-16 Chevron U.S.A. Inc. Process for altering the relative permeability of a hydrocarbon-bearing formation
US6649571B1 (en) 2000-04-04 2003-11-18 Masi Technologies, L.L.C. Method of generating gas bubbles in oleaginous liquids
WO2003001030A1 (en) 2001-06-22 2003-01-03 Bj Services Company Fracturing fluids and methods of making and using same
US6640898B2 (en) * 2002-03-26 2003-11-04 Halliburton Energy Services, Inc. High temperature seawater-based cross-linked fracturing fluids and methods
US6820694B2 (en) * 2002-04-23 2004-11-23 Schlumberger Technology Corporation Method for preparing improved high temperature fracturing fluids
BRPI0508227A (pt) 2004-02-27 2007-07-17 Univ Pittsburgh géis poliméricos interligados e uso de tais géis poliméricos na recuperação de hidrocarboneto
US20080035344A1 (en) * 2006-08-07 2008-02-14 Nadir Odeh Delayed polyacrylamide-co-aluminum hydroxyl chloride gel
US9790419B2 (en) * 2010-06-23 2017-10-17 Schlumberger Technology Corporation High temperature polymer gels for well treatments and their use
US9212551B2 (en) 2010-12-13 2015-12-15 Schlumberger Technology Corporation Chemical scavenger for downhole chemical analysis
US9052289B2 (en) 2010-12-13 2015-06-09 Schlumberger Technology Corporation Hydrogen sulfide (H2S) detection using functionalized nanoparticles
US9464222B2 (en) * 2011-03-09 2016-10-11 Baker Hughes Incorporated Well fluid and method of servicing a well
WO2018213050A1 (en) 2017-05-15 2018-11-22 Saudi Arabian Oil Company Composition and method for water and gas shut-off in subterranean formations
US10233380B1 (en) 2017-09-11 2019-03-19 Saudi Arabian Oil Company Well treatment fluid having an acidic nanoparticle based dispersion and a polyamine
US10316238B2 (en) 2017-09-11 2019-06-11 Saudi Arabian Oil Company Nanosilica dispersion for thermally insulating packer fluid
US10683452B2 (en) 2017-09-11 2020-06-16 Saudi Arabian Oil Company Nanosilica dispersion for thermally insulating packer fluid
US11279865B2 (en) 2017-09-11 2022-03-22 Saudi Arabian Oil Company Well treatment fluid having an acidic nanoparticle based dispersion, an epoxy resin, and a polyamine
EP4025666A1 (en) 2019-09-05 2022-07-13 Saudi Arabian Oil Company Propping open hydraulic fractures
US11802232B2 (en) 2021-03-10 2023-10-31 Saudi Arabian Oil Company Polymer-nanofiller hydrogels
CN115305071B (zh) * 2021-05-08 2024-06-04 中国石油天然气股份有限公司 酚醛体系弱凝胶调驱剂、调节剂及其制备方法
CN113698530B (zh) * 2021-10-28 2022-02-18 江苏富淼科技股份有限公司 一种高位阻系列阳离子固体型聚丙烯酰胺及其制备方法
US11920446B2 (en) * 2021-12-14 2024-03-05 Saudi Arabian Oil Company Methods for foam and gel injections into a well and enhanced foaming and gelations techniques
US11572761B1 (en) 2021-12-14 2023-02-07 Saudi Arabian Oil Company Rigless method for selective zonal isolation in subterranean formations using colloidal silica
US12158053B2 (en) 2021-12-14 2024-12-03 Saudi Arabian Oil Company Selective zonal isolation
US11708521B2 (en) 2021-12-14 2023-07-25 Saudi Arabian Oil Company Rigless method for selective zonal isolation in subterranean formations using polymer gels
US12486765B2 (en) 2023-10-17 2025-12-02 Saudi Arabian Oil Company Method for evaluating advanced conformance control, sweep efficiency, deep diversion, and water shutoff treatments

Family Cites Families (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3511789A (en) * 1966-04-21 1970-05-12 Owens Corning Fiberglass Corp Polymerizable materials of improved stability and foams produced therefrom
US3661868A (en) * 1970-05-01 1972-05-09 Dow Chemical Co Flocculant
US3959569A (en) * 1970-07-27 1976-05-25 The Dow Chemical Company Preparation of water-absorbent articles
US3929695A (en) * 1973-01-29 1975-12-30 Sumitomo Durez Co Phenolic resin adhesives containing resorcinol, formaldehyde and an alkali metal carbonate
GB1510689A (en) * 1974-12-19 1978-05-10 Sumitomo Chemical Co Preparation of water-soluble cationic high polymer
US4137182A (en) * 1977-06-20 1979-01-30 Standard Oil Company (Indiana) Process for fracturing well formations using aqueous gels
US4246124A (en) * 1978-07-17 1981-01-20 Phillips Petroleum Company Gelled compositions and well treating
US4389320A (en) * 1979-12-04 1983-06-21 Phillips Petroleum Company Foamable compositions and formations treatment
US4300634A (en) * 1979-12-04 1981-11-17 Phillips Petroleum Company Foamable compositions and formations treatment
US4428432A (en) * 1980-04-16 1984-01-31 Smith International, Incorporated Method for stimulating siliceous subterranean formations
US4440228A (en) * 1980-08-06 1984-04-03 Phillips Petroleum Company Gelled compositions and well treating
US4413680A (en) * 1981-12-21 1983-11-08 Union Oil Company Of California Permeability reduction in subterranean reservoirs
US4811787A (en) * 1982-03-11 1989-03-14 Borden Company Limited Method for reducing the permeability of underground strata during secondary recovery of oil
US4514309A (en) * 1982-12-27 1985-04-30 Hughes Tool Company Cross-linking system for water based well fracturing fluids
JPS6060549A (ja) * 1983-09-14 1985-04-08 Fuji Photo Film Co Ltd ゲル電気泳動用媒体
US4534412A (en) * 1983-12-09 1985-08-13 Union Oil Company Of California Continuous permeability reduction in subterranean reservoirs
US4579670A (en) * 1984-03-26 1986-04-01 Big Three Industries, Inc. Control of crosslinking reaction rate of aqueous fracturing fluids
US4606772A (en) * 1984-05-04 1986-08-19 Halliburton Company Composition for and method of altering the permeability of a subterranean formation
JPS6136296A (ja) * 1984-07-30 1986-02-20 Lion Corp 生体膜蛋白質の分離精製法
US4553601A (en) * 1984-09-26 1985-11-19 Halliburton Company Method for fracturing subterranean formations
US4776398A (en) * 1985-01-31 1988-10-11 Mobil Oil Corporation Oil reservoir permeability control
US4619776A (en) * 1985-07-02 1986-10-28 Texas United Chemical Corp. Crosslinked fracturing fluids
US4822842A (en) * 1987-02-03 1989-04-18 Phillips Petroleum Company Delaying the gelation of water soluble polymers
US4782900A (en) * 1987-04-24 1988-11-08 Pfizer Inc. Aminoalkylated polyacrylamide aldehyde gels, their preparation and use in oil recovery
US4779680A (en) * 1987-05-13 1988-10-25 Marathon Oil Company Hydraulic fracturing process using a polymer gel
US4801389A (en) * 1987-08-03 1989-01-31 Dowell Schlumberger Incorporated High temperature guar-based fracturing fluid
DE3738902A1 (de) * 1987-11-17 1989-05-24 Ruetgerswerke Ag Hitzehaertendes bindemittel und seine verwendung
US5079278A (en) * 1989-12-13 1992-01-07 Mobil Oil Corporation Enhanced oil recovery profile control with crosslinked anionic acrylamide copolymer gels
US4907656A (en) * 1988-12-30 1990-03-13 Mobil Oil Corporation Method for preventing steam channelling into a non-aquifer bottom water zone
US5071890A (en) * 1989-01-03 1991-12-10 Mobil Oil Corp. Composition for selective placement of polymer gels for profile control in thermal oil recovery
US4928766A (en) * 1989-02-16 1990-05-29 Mobil Oil Corporation Stabilizing agent for profile control gels and polymeric gels of improved stability
US4926943A (en) * 1989-03-10 1990-05-22 Mobil Oil Corporation Phenolic and naphtholic ester crosslinked polymeric gels for permeability profile control
US4896723A (en) * 1989-06-21 1990-01-30 Mobil Oil Corporation Cross-linked polyvinyl alcohols and oil reservoir permeability control therewith
US5100931A (en) * 1990-03-12 1992-03-31 Phillips Petroleum Company Gelation of acrylamide-containing polymers with hydroxyphenylalkanols
US5043364A (en) * 1990-03-15 1991-08-27 Phillips Petroleum Company Gelation of acrylamide-containing polymers with furfuryl alcohol and water dispersible aldehydes
US5125456A (en) * 1991-03-27 1992-06-30 Union Oil Company Of California Composition for selectively reducing subterranean formation permeability
US5145913A (en) * 1990-08-02 1992-09-08 Borden, Inc. Retarders for curing phenolic resole resins
US5145012A (en) * 1990-12-21 1992-09-08 Union Oil Company Of California Method for selectively reducing subterranean water permeability
US5160445A (en) * 1991-05-24 1992-11-03 Zirconium Technology Corporation Borate cross-linking solutions
CA2091489C (en) * 1992-04-13 2001-05-08 Ahmad Moradi-Araghi Gelation of water soluble polymers
US5447986A (en) * 1992-06-29 1995-09-05 Phillips Petroleum Company Acceleration of gelation of water soluble polymers
US5246073A (en) * 1992-08-31 1993-09-21 Union Oil Company Of California High temperature stable gels
US5335733A (en) * 1992-08-31 1994-08-09 Union Oil Company Of California Method for delaying gelation of a gelable polymer composition injected into a subterranean formation
US5617920A (en) * 1992-08-31 1997-04-08 Union Oil Company Of California Method for modifying gelation time of organically crosslinked, aqueous gels

Also Published As

Publication number Publication date
US5762141A (en) 1998-06-09
WO1996017154A1 (en) 1996-06-06
AU4242196A (en) 1996-06-19
CO4440491A1 (es) 1997-05-07
US5957203A (en) 1999-09-28

Similar Documents

Publication Publication Date Title
AR000266A1 (es) Un método para formar un gel en al menos una partede una formación subterranea
AR011332A1 (es) Composicion que presenta propiedades de barrera a gases mejorada.
FI902310A0 (fi) Kosmetiskt vattenhaltigt gel baserat pao hyaluronsyra och deoxirobonukleinsyra och dess framstaellningsfoerfarande.
GB2364725A (en) Method for treatment of underground reservoirs
AU582980B2 (en) Fabric softener composition
ES8800294A1 (es) Un procedimiento para preparar un poliol modificado
TW341518B (en) Medical material containing an antiplatelet agent and process for producing the same
BRPI0416032A (pt) excipientes em veìculos de distribuição de fármacos
DE69928617D1 (de) Hydrosilylierungsverfahren mit hoher Ausbeute
ES8602022A1 (es) Un procedimiento para preparar un derivado de 4'-dimetil-4-epipodofilotoxina
AR025758A1 (es) Metodo para mejorar la permeabilidad de una formacion subterranea que contiene petroleo
MX9207504A (es) Composiciones curables por humedad y metodo para curar composiciones curables por humedad.
AR032016A1 (es) Una composicion catalizadora y los metodos para su preparacion y el uso en un proceso de polimerizacion
ATE255558T1 (de) Verfahren zur herstellung von alkylierten diphenylaminzusammensetzungen
GB2390175A (en) System and method for fabricating bragg gratings
BR0015816A (pt) Fluido magnético
ES2169073T3 (es) Composiciones en forma de soluciones solidas.
DE58904509D1 (de) Verfahren zur herstellung eines elastomerhaltigen vinylchloridpfropfcopolymerisats.
ES2151225T3 (es) Polimeros ioneno de amonio cuaternario que contienen azufre y su uso como microbicidas.
ES2195089T3 (es) Benzotiofenos amorfos, procedimientos de preparacion y uso.
MX167558B (es) Un metodo para inhibir el crecimiento de algas
Ehresmann et al. Nucleotide sequences of sections of 16S ribosomal RNA
AR240871A2 (es) Composicion de sales dispersantes acuosa, util para dispersar distintas particulas o fluido en una fase acuosa.
ES2084626T3 (es) Reduccion de la acidez de poliesteres mediante proteccion terminal en reaccion de fusion.
DE69811911D1 (de) Künstlicher schnee und verfahren zu dessen herstellung