MX163582B - Metodo para la elaboracion de perlas esfericas de alumina - Google Patents

Metodo para la elaboracion de perlas esfericas de alumina

Info

Publication number
MX163582B
MX163582B MX190765A MX19076582A MX163582B MX 163582 B MX163582 B MX 163582B MX 190765 A MX190765 A MX 190765A MX 19076582 A MX19076582 A MX 19076582A MX 163582 B MX163582 B MX 163582B
Authority
MX
Mexico
Prior art keywords
pearls
elaboration
spherical alumina
alumina
spherical
Prior art date
Application number
MX190765A
Other languages
English (en)
Inventor
William Edward Bambrick
Marvin Sherwood Goldstein
Original Assignee
American Cyanamid 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 American Cyanamid Co filed Critical American Cyanamid Co
Publication of MX163582B publication Critical patent/MX163582B/es

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01FCOMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F7/00Compounds of aluminium
    • C01F7/02Aluminium oxide; Aluminium hydroxide; Aluminates
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J21/00Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/02Boron or aluminium; Oxides or hydroxides thereof
    • B01J21/04Alumina
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/76Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/84Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/85Chromium, molybdenum or tungsten
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • B01J35/60Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10GCRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G45/00Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds
    • C10G45/02Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing
    • C10G45/04Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing characterised by the catalyst used
    • C10G45/06Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing characterised by the catalyst used containing nickel or cobalt metal, or compounds thereof
    • C10G45/08Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing characterised by the catalyst used containing nickel or cobalt metal, or compounds thereof in combination with chromium, molybdenum, or tungsten metals, or compounds thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • B01J35/60Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J35/61Surface area
    • B01J35/615100-500 m2/g
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • B01J35/60Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J35/63Pore volume
    • B01J35/6350.5-1.0 ml/g
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • B01J35/60Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J35/64Pore diameter
    • B01J35/6472-50 nm
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00Particle morphology
    • C01P2004/30Particle morphology extending in three dimensions
    • C01P2004/32Spheres
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00Particle morphology
    • C01P2004/60Particles characterised by their size
    • C01P2004/61Micrometer sized, i.e. from 1-100 micrometer
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00Particle morphology
    • C01P2004/60Particles characterised by their size
    • C01P2004/62Submicrometer sized, i.e. from 0.1-1 micrometer
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00Physical properties of inorganic compounds
    • C01P2006/10Solid density
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00Physical properties of inorganic compounds
    • C01P2006/14Pore volume
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00Physical properties of inorganic compounds
    • C01P2006/16Pore diameter
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00Physical properties of inorganic compounds
    • C01P2006/22Rheological behaviour as dispersion, e.g. viscosity, sedimentation stability

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Catalysts (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
MX190765A 1980-12-24 1982-01-04 Metodo para la elaboracion de perlas esfericas de alumina MX163582B (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US20977680A 1980-12-24 1980-12-24
US06/325,699 US4411771A (en) 1980-12-24 1981-11-30 Process for hydrotreating heavy hydrocarbons and catalyst used in said process

Publications (1)

Publication Number Publication Date
MX163582B true MX163582B (es) 1992-06-03

Family

ID=26904498

Family Applications (1)

Application Number Title Priority Date Filing Date
MX190765A MX163582B (es) 1980-12-24 1982-01-04 Metodo para la elaboracion de perlas esfericas de alumina

Country Status (7)

Country Link
US (1) US4411771A (es)
EP (1) EP0054976B1 (es)
AU (1) AU535847B2 (es)
BR (1) BR8108392A (es)
CA (1) CA1173817A (es)
DE (1) DE3175051D1 (es)
MX (1) MX163582B (es)

Families Citing this family (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2528721B1 (fr) * 1982-06-17 1986-02-28 Pro Catalyse Ste Fse Prod Cata Catalyseur supporte presentant une resistance accrue aux poisons et son utilisation en particulier pour l'hydrotraitement de fractions petrolieres contenant des metaux
US4534855A (en) * 1983-01-03 1985-08-13 Tenneco Oil Company Shale oil demetallization process
EP0121735A1 (en) * 1983-03-16 1984-10-17 American Cyanamid Company Reforming catalysts having support prepared from rehydratable alumina
US4636484A (en) * 1983-09-22 1987-01-13 Catalysts & Chemicals Industries Co., Ltd. Method for the preparation of catalyst composition for use in cracking hydrocarbons
EP0145341A3 (en) * 1983-11-18 1987-08-26 Aluminum Company Of America Method for making alumina objects
US4579839A (en) * 1983-11-18 1986-04-01 Aluminum Company Of America Rehydration bondable alumina
JPS60193543A (ja) * 1984-03-15 1985-10-02 Shokubai Kasei Kogyo Kk 炭化水素接触分解用触媒組成物の製造法
WO1992002456A1 (en) * 1985-03-18 1992-02-20 Aluminum Company Of America Alumina suitable for catalytic applications
IT1186728B (it) * 1985-06-04 1987-12-16 Montedison Spa Ossidi misti di allumina e zirconia sotto forma di particelle sferiche ed aventi distribuzione granulometrica ristretta e processo per la loro preparazione
US4816139A (en) * 1986-06-27 1989-03-28 Tenneco Oil Company Method for removing sulfur compounds from C6 and lower alkanes
US4895816A (en) * 1987-02-06 1990-01-23 Gardner Lloyd E Support material containing catalyst for fixed hydrofining beds
US4828683A (en) * 1987-02-06 1989-05-09 Phillips Petroleum Company Hydrofining employing a support material for fixed beds
US4767523A (en) * 1987-03-11 1988-08-30 Phillips Petroleum Company Treated alumina material for fixed hydrofining beds
US4820676A (en) * 1987-03-11 1989-04-11 Phillips Petroleum Company Treated alumina material for fixed hydrofining beds and process for its preparation
US4870044A (en) * 1987-03-12 1989-09-26 Phillips Petroleum Company Treated alumina material for fixed hydrofining beds
US4802974A (en) * 1987-03-12 1989-02-07 Phillips Petroleum Company Hydrofining employing treated alumina material in fixed beds
US4729980A (en) * 1987-04-27 1988-03-08 Intevep, S.A. Catalyst for the simultaneous hydrodemetallization and hydroconversion of heavy hydrocarbon feedstocks and process for preparing the catalyst
US4824556A (en) * 1987-05-20 1989-04-25 Phillips Petroleum Company Hydrogenation process of unsaturated hydrocarbons employing impregnated alumina containing material
US4814315A (en) * 1987-05-20 1989-03-21 Phillips Petroleum Company Pretreated alumina containing material and process for its preparation
US4831004A (en) * 1987-05-20 1989-05-16 Phillips Petroleum Company Impregnated alumina-containing material
US4778588A (en) * 1987-05-20 1988-10-18 Phillips Petroleum Company Hydrotreating process employing an impregnated alumina containing material
US4778587A (en) * 1987-05-20 1988-10-18 Phillips Petroleum Company Hydrotreating process employing a pretreated alumina containing material
US5498327A (en) * 1989-07-19 1996-03-12 Stangeland; Bruce E. Catalyst, method and apparatus for an on-stream particle replacement system for countercurrent contact of a gas and liquid feed stream with a packed bed
US5472928A (en) * 1989-07-19 1995-12-05 Scheuerman; Georgieanna L. Catalyst, method and apparatus for an on-stream particle replacement system for countercurrent contact of a gas and liquid feed stream with a packed bed
US5492617A (en) * 1989-07-19 1996-02-20 Trimble; Harold J. Apparatus and method for quenching in hydroprocessing of a hydrocarbon feed stream
US5589057A (en) * 1989-07-19 1996-12-31 Chevron U.S.A. Inc. Method for extending the life of hydroprocessing catalyst
US5916529A (en) * 1989-07-19 1999-06-29 Chevron U.S.A. Inc Multistage moving-bed hydroprocessing reactor with separate catalyst addition and withdrawal systems for each stage, and method for hydroprocessing a hydrocarbon feed stream
JP3162373B2 (ja) * 1989-09-29 2001-04-25 エクソン・リサーチ・アンド・エンジニアリング・カンパニー ゼオライト凝集体及び触媒
IS3896A (is) * 1991-08-07 1993-02-08 Comalco Aluminium Limited Hreinsun á loftkenndum flúoríðum úr útblæstri iðjuvera
US5885534A (en) * 1996-03-18 1999-03-23 Chevron U.S.A. Inc. Gas pocket distributor for hydroprocessing a hydrocarbon feed stream
US5879642A (en) * 1996-04-24 1999-03-09 Chevron U.S.A. Inc. Fixed bed reactor assembly having a guard catalyst bed
JP4266406B2 (ja) * 1998-05-11 2009-05-20 日本ケッチェン株式会社 粒状触媒用担体及びこの担体を用いた触媒及び該触媒による炭化水素油の水素化処理方法
DE10119233A1 (de) * 2001-04-19 2002-11-07 Sued Chemie Ag Verfahren zur Herstellung von Hydrotalcit-Vorläufern bzw. von Hydrotalciten
FR2867988B1 (fr) * 2004-03-23 2007-06-22 Inst Francais Du Petrole Catalyseur supporte dope de forme spherique et procede d'hydrotraitement et d'hydroconversion de fractions petrolieres contenant des metaux
US8153180B2 (en) * 2005-09-06 2012-04-10 Pepsico, Inc. Method and apparatus for making beverages
DE102007011471B4 (de) * 2006-03-09 2021-09-30 Shell Internationale Research Maatschappij B.V. Katalysatorkombination für die hydrierende Verarbeitung von Vakuumgasölen und/oder Visbreakergasölen
WO2008141423A1 (en) 2007-05-21 2008-11-27 Exploration Orbite Vspa Inc. Processes for extracting aluminum and iron from aluminous ores
RU2588960C2 (ru) 2011-03-18 2016-07-10 Орбит Элюминэ Инк. Способы извлечения редкоземельных элементов из алюминийсодержащих материалов
EP2705169A4 (en) 2011-05-04 2015-04-15 Orbite Aluminae Inc METHOD FOR RECOVERING RARE ELEMENTS FROM DIFFERENT OTHERS
CN103842296B (zh) 2011-06-03 2016-08-24 奥贝特科技有限公司 用于制备赤铁矿的方法
CA2840387C (en) * 2011-06-28 2020-09-01 William Douglas Gillespie An ether amine additive impregnated composition useful in the catalytic hydroprocessing of hydrocarbons, a method of making such composition
CA2848751C (en) 2011-09-16 2020-04-21 Orbite Aluminae Inc. Processes for preparing alumina and various other products
EP2802675B1 (en) 2012-01-10 2020-03-11 Orbite Aluminae Inc. Processes for treating red mud
JP2015518414A (ja) 2012-03-29 2015-07-02 オーバイト アルミナ インコーポレイテッドOrbite Aluminae Inc. フライアッシュ処理プロセス
RU2597096C2 (ru) 2012-07-12 2016-09-10 Орбит Алюминэ Инк. Способы получения оксида титана и различных других продуктов
MX345342B (es) * 2012-08-20 2017-01-24 Inst Mexicano Del Petróleo Procedimiento para el mejoramiento de crudos pesados y extrapesados.
JP2015535886A (ja) 2012-09-26 2015-12-17 オーバイト アルミナ インコーポレイテッドOrbite Aluminae Inc. 種々の材料のHCl浸出によるアルミナおよび塩化マグネシウムを調製するためのプロセス
CA2891427C (en) 2012-11-14 2016-09-20 Orbite Aluminae Inc. Methods for purifying aluminium ions
US11091396B2 (en) * 2016-05-23 2021-08-17 Sasol (Usa) Corporation High strength shaped aluminas and a method of producing such high strength shaped aluminas
CN110201691B (zh) * 2019-06-25 2022-05-06 中化泉州石化有限公司 一种渣油加氢脱金属脱硫催化剂及其制备方法
WO2023208826A1 (en) 2022-04-25 2023-11-02 Basf Corporation Process for the preparation of particulate alumina

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2492167A (en) * 1943-06-01 1949-12-27 Socony Vacuum Oil Co Inc Process of forming alumina-containing gel beads
US2448460A (en) * 1944-03-07 1948-08-31 Standard Oil Dev Co Process of producing an inorganic hydrogel
FR939752A (fr) * 1946-01-16 1948-11-24 Bataafsche Petroleum Préparation de particules en forme de larmes
US3519574A (en) * 1964-02-14 1970-07-07 American Cyanamid Co Process for manufacture of catalyst material and catalyst material produced thereby
DE1592098C3 (de) * 1965-12-13 1978-05-11 Engelhard Minerals & Chemicals Corp., Murray Hill, N.J. (V.St.A.) Verfahren zur Herstellung von kugelförmigen Aluminiumoxidteilchen
GB1119589A (en) * 1965-12-13 1968-07-10 Engelhard Min & Chem Improvements in or relating to aluminum oxide gels
FR2223306B1 (es) * 1973-03-27 1975-08-22 Rhone Progil
US3923646A (en) * 1973-04-03 1975-12-02 Universal Oil Prod Co Hydrodesulfurization with a catalyst formed from an alumina sol containing alpha-alumina monohydrate
US4069139A (en) * 1975-12-29 1978-01-17 Exxon Research & Engineering Co. Hydrodesulfurization of oil utilizing a narrow pore size distribution catalyst
US4016106A (en) * 1976-01-05 1977-04-05 Exxon Research And Engineering Company Preparation of catalysts of predetermined pore size distribution and pore volume
US4120826A (en) * 1976-06-14 1978-10-17 American Cyanamid Company Hydrodesulfurization catalysts based on supports prepared from rehydratable alumina
US4038177A (en) * 1976-07-19 1977-07-26 Exxon Research And Engineering Company Oil hydrodesulfurization with alumina composite catalyst utilizing aluminate and dicarboxylic acid in its preparation
US4065407A (en) * 1976-09-16 1977-12-27 American Cyanamid Company Process for preparing shaped particles from rehydratable alumina
US4169874A (en) * 1976-09-16 1979-10-02 American Cyanamid Company Process for preparing shaped particles from rehydratable alumina
US4119531A (en) * 1977-06-30 1978-10-10 Standard Oil Company (Indiana) Large-pore hydrodemetallization catalyst and process employing same
CA1127791A (en) * 1978-05-19 1982-07-13 Robert L. Albright Method of suspension polymerization and apparatus therefor

Also Published As

Publication number Publication date
AU535847B2 (en) 1984-04-05
EP0054976A1 (en) 1982-06-30
CA1173817A (en) 1984-09-04
AU7884581A (en) 1982-07-01
US4411771A (en) 1983-10-25
EP0054976B1 (en) 1986-07-30
DE3175051D1 (en) 1986-09-04
BR8108392A (pt) 1982-10-13

Similar Documents

Publication Publication Date Title
MX163582B (es) Metodo para la elaboracion de perlas esfericas de alumina
ES501636A0 (es) Procedimiento para la elaboracion de polieterpolioles
ES501609A0 (es) Metodo para la preparacion de espumas de poli-cloruro de vi-nilo-rigidas
ES523353A0 (es) Aparato para la formacion de perlas vitreas redondeadas
MX6869E (es) Procedimiento para la preparacion de dibenzimidiazoazepinas
ES502546A0 (es) Procedimiento para la preparacion de nuevas n-ariloxazolidi-nonas-2
AR228468A1 (es) Procedimiento para la preparacion de nuevas imidazolil-fenilamidinas
AR226202A1 (es) Procedimiento para la preparacion de 7-acil-3-yodometil-cefalosporinas
MX160977A (es) Procedimiento para la preparacion de cloroformiatos alfa-clorados
AR231451A1 (es) Metodo para la preparacion de n-fosfonometilglicina
MX155760A (es) Procedimiento para la preparacion de 1-amino-4-hidroxi-2-fenoxiantraquinonas o 1-amino-4-hidroxi-2-alcoxiantraquinonas
ES501464A0 (es) Procedimiento para la preparacion de nuevas fenilureas
ES556402A0 (es) Aparato para la formacion de perlas vitreas
ES501639A0 (es) Procedimiento para la elaboracion de polieterpolioles
MX163099B (es) Procedimiento para la preparacion de aminas terciarias
ES503975A0 (es) Procedimiento para la preparacion de nuevas fenilureas
AR225813A1 (es) Procedimiento para la preparacion de 3-picolina
ES2020587B3 (es) Procedimiento para la elaboracion de acidos de trifluormetana - sulfona
MX157972A (es) Metodo para la preparacion de n-fosfonometilglicina
ES500068A0 (es) Procedimiento para la obtencion de nuevos tioles
ES500892A0 (es) Procedimiento para la obtencion de derivados de bifeni- lil-azoliletano
ES500071A0 (es) Procedimiento para la preparacion de nuevos 2-nitro-5-feno- xifenil-oxazoles,-oxacinas,-imidazoles,-pirimidinas o-tiazo-les
AR229350A1 (es) Procedimiento para la preparacion de nuevas guanilamidinas
ES505095A0 (es) Procedimiento para la preparacion de nuevas pirazinas
AR224302A1 (es) Procedimiento mejorado para la preparacion de cloruro de 4-triclorometoxibenzoilo