ES2000664A6 - Proceso para la eliminacion del exceso de nitritos en las soluciones de diazotacion - Google Patents

Proceso para la eliminacion del exceso de nitritos en las soluciones de diazotacion

Info

Publication number
ES2000664A6
ES2000664A6 ES8600277A ES8600277A ES2000664A6 ES 2000664 A6 ES2000664 A6 ES 2000664A6 ES 8600277 A ES8600277 A ES 8600277A ES 8600277 A ES8600277 A ES 8600277A ES 2000664 A6 ES2000664 A6 ES 2000664A6
Authority
ES
Spain
Prior art keywords
diazotization
solutions
nitrite
eliminate
controlled
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
ES8600277A
Other languages
English (en)
Inventor
Rakoczi
Bruno Fortsch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Novartis AG
Original Assignee
Ciba Geigy AG
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 Ciba Geigy AG filed Critical Ciba Geigy AG
Publication of ES2000664A6 publication Critical patent/ES2000664A6/es
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
    • C09B67/0096—Purification; Precipitation; Filtration
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/416—Systems
    • G01N27/4166—Systems measuring a particular property of an electrolyte

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biochemistry (AREA)
  • Immunology (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Molecular Biology (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Electrochemistry (AREA)
  • Pathology (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Removal Of Specific Substances (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)

Abstract

SE DESCRIBE UN PROCESO CONTINUO ACCIONADO AUTOMATICAMENTE PARA LA ELIMINACION DEL EXCESO DE NITRITOS EN LAS SOLUCIONES DE DIAZOTACION DE AMINAS AROMATICAS, CARACTERIZADO POR EL HECHO DE QUE LA ADICION DEL PRODUCTO PARA ELIMINAR LOS NITRITOS ESTA REGULADA POR UNA MAGNITUD ELECTROQUIMICA. EL PROCESO FACILITA UN CONTROL SIN PROBLEMAS DE LA CONCENTRACION DE LOS IONES NITRITO EN LAS SOLUCIONES DE DIAZOTACION. ES UNA VENTAJA, QUE LA CAPTACION DE LA MAGNITUD ELECTROQUIMICA REGULADORA SE LLEVA A CABO, PRACTICAMENTE SIN RETRASO, Y QUE A TRAVES DE LAS FLUCTUACIONES DEL POTENCIAL Y DE UNA MANERA SENCILLA, SE PUEDA ACCIONAR LA ADICION DE PRODUCTO DESTRUCTOR DE NITRITOS.
ES8600277A 1985-07-15 1986-07-14 Proceso para la eliminacion del exceso de nitritos en las soluciones de diazotacion Expired ES2000664A6 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH305285 1985-07-15

Publications (1)

Publication Number Publication Date
ES2000664A6 true ES2000664A6 (es) 1988-03-16

Family

ID=4247532

Family Applications (1)

Application Number Title Priority Date Filing Date
ES8600277A Expired ES2000664A6 (es) 1985-07-15 1986-07-14 Proceso para la eliminacion del exceso de nitritos en las soluciones de diazotacion

Country Status (6)

Country Link
US (1) US4845638A (es)
EP (1) EP0209492A3 (es)
JP (1) JPS6215261A (es)
KR (1) KR870001272A (es)
BR (1) BR8603339A (es)
ES (1) ES2000664A6 (es)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4918168A (en) * 1987-11-24 1990-04-17 Mallinckrodt Inc. Process for the continuous diazotization of amines in a multi-stage reactor
DK374889D0 (da) * 1989-07-28 1989-07-28 Koege Kemisk Vaerk Fremgangsmaade til procesovervaagning
DE4405469C2 (de) * 1994-02-21 1996-11-07 Ciba Geigy Ag Verfahren zur Herstellung von Azofarbstoffen
NL2018826B1 (en) 2017-05-02 2018-11-09 Spgprints B V One-pot synthesis of reactive deep black

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3800288A (en) * 1972-02-24 1974-03-26 Foxboro Co Computer-directed process control system with crt display
US4159264A (en) * 1975-08-09 1979-06-26 Ciba-Geigy Corporation Automatic control of azo coupling processes in the manufacture of azo pigments
GB1547760A (en) * 1975-08-12 1979-06-27 Ciba Geigy Ag Control of continuos diazotisation of aromatic amines
DE2741925A1 (de) * 1977-09-17 1979-03-29 Bayer Ag Verfahren zur kontinuierlichen indirekten diazotierung von aromatischen aminen
US4246171A (en) * 1978-09-07 1981-01-20 Ciba-Geigy Corporation Continuous diazotization process, wherein the rate of addition of inorganic nitrite is automatically controlled by polarovoltric means
DE2843873A1 (de) * 1978-10-07 1980-04-17 Basf Ag Azoverbindungen
DE2903588A1 (de) * 1979-01-31 1980-08-14 Basf Ag Polyazofarbstoffe
DD144118A1 (de) * 1979-06-05 1980-09-24 Kallweit Hans Juergen Verfahren und vorrichtung zur bestimmung von nitrit sowie nitrosen gasen
US4294755A (en) * 1979-10-10 1981-10-13 Basf Aktiengesellschaft Pigments containing pyrazolo quinazolone radicals
US4387422A (en) * 1980-06-03 1983-06-07 Steutermann Edward M Control system process controller
EP0071988B1 (en) * 1981-08-05 1988-05-11 Sumitomo Rubber Industries Limited Apparatus for automatically measuring and controlling chemical reaction amount
US4633413A (en) * 1983-07-28 1986-12-30 Cavro Scientific Instruments Digital dilution apparatus and method
US4737240A (en) * 1985-05-02 1988-04-12 Ciba-Geigy Corporation Trisazo black dyes from 2-(4'-aminophenylazo)-7-amino-1-naphthol-3-sulfonic acid

Also Published As

Publication number Publication date
BR8603339A (pt) 1987-02-24
EP0209492A3 (de) 1989-11-02
KR870001272A (ko) 1987-03-12
JPS6215261A (ja) 1987-01-23
EP0209492A2 (de) 1987-01-21
US4845638A (en) 1989-07-04

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