AT252876B - Verfahren zur Durchführung von Gasphasenreaktionen - Google Patents

Verfahren zur Durchführung von Gasphasenreaktionen

Info

Publication number
AT252876B
AT252876B AT325264A AT325264A AT252876B AT 252876 B AT252876 B AT 252876B AT 325264 A AT325264 A AT 325264A AT 325264 A AT325264 A AT 325264A AT 252876 B AT252876 B AT 252876B
Authority
AT
Austria
Prior art keywords
carrying
gas phase
out gas
phase reactions
reactions
Prior art date
Application number
AT325264A
Other languages
English (en)
Inventor
Hans Dr Zirngibl
Walter Dr Gutsche
Walter Dipl Ing Weidmann
Klaus Dipl Ing Wauschkuhn
Original Assignee
Bayer 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 Bayer Ag filed Critical Bayer Ag
Application granted granted Critical
Publication of AT252876B publication Critical patent/AT252876B/de

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B82NANOTECHNOLOGY
    • B82YSPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00Nanotechnology for materials or surface science, e.g. nanocomposites
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00Carbon; Compounds thereof
    • C01B32/90Carbides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J12/00Chemical processes in general for reacting gaseous media with gaseous media; Apparatus specially adapted therefor
    • B01J12/005Chemical processes in general for reacting gaseous media with gaseous media; Apparatus specially adapted therefor carried out at high temperatures, e.g. by pyrolysis
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J15/00Chemical processes in general for reacting gaseous media with non-particulate solids, e.g. sheet material; Apparatus specially adapted therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/24Stationary reactors without moving elements inside
    • B01J19/2405Stationary reactors without moving elements inside provoking a turbulent flow of the reactants, such as in cyclones, or having a high Reynolds-number
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/18Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
    • B01J8/24Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique
    • B01J8/42Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique with fluidised bed subjected to electric current or to radiations this sub-group includes the fluidised bed subjected to electric or magnetic fields
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/14Methods for preparing oxides or hydroxides in general
    • C01B13/20Methods for preparing oxides or hydroxides in general by oxidation of elements in the gaseous state; by oxidation or hydrolysis of compounds in the gaseous state
    • C01B13/22Methods for preparing oxides or hydroxides in general by oxidation of elements in the gaseous state; by oxidation or hydrolysis of compounds in the gaseous state of halides or oxyhalides
    • C01B13/28Methods for preparing oxides or hydroxides in general by oxidation of elements in the gaseous state; by oxidation or hydrolysis of compounds in the gaseous state of halides or oxyhalides using a plasma or an electric discharge
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00Nitrogen; Compounds thereof
    • C01B21/06Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00Nitrogen; Compounds thereof
    • C01B21/06Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
    • C01B21/068Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron with silicon
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00Silicon; Compounds thereof
    • C01B33/06Metal silicides
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00Silicon; Compounds thereof
    • C01B33/113Silicon oxides; Hydrates thereof
    • C01B33/12Silica; Hydrates thereof, e.g. lepidoic silicic acid
    • C01B33/18Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof
    • C01B33/181Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof by a dry process
    • C01B33/183Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof by a dry process by oxidation or hydrolysis in the vapour phase of silicon compounds such as halides, trichlorosilane, monosilane
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B35/00Boron; Compounds thereof
    • C01B35/02Boron; Borides
    • C01B35/04Metal borides
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01GCOMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G1/00Methods of preparing compounds of metals not covered by subclasses C01B, C01C, C01D, or C01F, in general
    • C01G1/12Sulfides
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01GCOMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G23/00Compounds of titanium
    • C01G23/02Halides of titanium
    • C01G23/026Titanium trichloride
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01GCOMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G23/00Compounds of titanium
    • C01G23/04Oxides; Hydroxides
    • C01G23/047Titanium dioxide
    • C01G23/07Producing by vapour phase processes, e.g. halide oxidation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049Controlling or regulating processes
    • B01J2219/00051Controlling the temperature
    • B01J2219/00074Controlling the temperature by indirect heating or cooling employing heat exchange fluids
    • B01J2219/00105Controlling the temperature by indirect heating or cooling employing heat exchange fluids part or all of the reactants being heated or cooled outside the reactor while recycling
    • B01J2219/00112Controlling the temperature by indirect heating or cooling employing heat exchange fluids part or all of the reactants being heated or cooled outside the reactor while recycling involving reactant solids
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049Controlling or regulating processes
    • B01J2219/00051Controlling the temperature
    • B01J2219/00132Controlling the temperature using electric heating or cooling elements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049Controlling or regulating processes
    • B01J2219/00051Controlling the temperature
    • B01J2219/0015Controlling the temperature by thermal insulation means
    • B01J2219/00155Controlling the temperature by thermal insulation means using insulating materials or refractories
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049Controlling or regulating processes
    • B01J2219/00051Controlling the temperature
    • B01J2219/00159Controlling the temperature controlling multiple zones along the direction of flow, e.g. pre-heating and after-cooling
    • 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
    • C01P2004/00Particle morphology
    • C01P2004/60Particles characterised by their size
    • C01P2004/64Nanometer sized, i.e. from 1-100 nanometer
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00Physical properties of inorganic compounds
    • C01P2006/60Optical properties, e.g. expressed in CIELAB-values
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00Physical properties of inorganic compounds
    • C01P2006/80Compositional purity

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Nanotechnology (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Combustion & Propulsion (AREA)
  • Composite Materials (AREA)
  • Plasma & Fusion (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Carbon And Carbon Compounds (AREA)
AT325264A 1963-04-27 1964-04-14 Verfahren zur Durchführung von Gasphasenreaktionen AT252876B (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DEF39605A DE1206399B (de) 1963-04-27 1963-04-27 Verfahren zur Durchfuehrung von Gasphasenreaktionen
DEF41855A DE1222896B (de) 1963-04-27 1964-01-29 Vorrichtung zur Durchfuehrung von Gasphasenreaktionen
DEF41910A DE1237542B (de) 1963-04-27 1964-02-04 Verfahren zur Durchfuehrung von Gasphasenreaktionen bei hohen Temperaturen
DEF41919A DE1229988B (de) 1963-04-27 1964-02-05 Verfahren und Vorrichtung zur Durchfuehrung von Gasphasenreaktionen unter Bildung mindestens eines festen Reaktionsproduktes

Publications (1)

Publication Number Publication Date
AT252876B true AT252876B (de) 1967-03-10

Family

ID=27436900

Family Applications (1)

Application Number Title Priority Date Filing Date
AT325264A AT252876B (de) 1963-04-27 1964-04-14 Verfahren zur Durchführung von Gasphasenreaktionen

Country Status (9)

Country Link
US (1) US3532462A (de)
AT (1) AT252876B (de)
BE (1) BE647140A (de)
CH (1) CH456546A (de)
DE (4) DE1206399B (de)
FI (1) FI44795C (de)
FR (1) FR1427644A (de)
GB (1) GB1062579A (de)
NL (1) NL6404639A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019211921A1 (de) * 2019-08-08 2021-02-11 Schmid Silicon Technology Gmbh Verfahren und Vorrichtung zur Erzeugung siliziumhaltiger Materialien

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL131994C (de) * 1964-10-22
US3493342A (en) * 1968-02-16 1970-02-03 Cabot Corp Collection of pyrogenic titanium dioxide pigments
CH525705A (de) * 1968-12-24 1972-07-31 Lonza Ag Verwendung von vortex-stabilisierten Plasmabrennern zur Durchführung von chemischen Reaktionen
BE755089A (fr) * 1969-08-20 1971-02-22 Montedison Spa Reacteur et procede pour la fabrication de dioxyde de titane dequalite pigmentaire
FR2120491A5 (de) * 1971-01-06 1972-08-18 Anvar
US4120941A (en) * 1974-10-31 1978-10-17 Halomet Ag Process for the oxidation of halides
US4335080A (en) 1977-08-01 1982-06-15 Thermo Electron Corporation Apparatus for producing selective particle sized oxide
GB2002208B (en) * 1977-08-01 1982-04-28 Thermo Electron Corp Process of and apparatus for producing a particulate product from a feed material
FR2407738A1 (fr) * 1977-11-08 1979-06-01 Banquy David Appareil melangeur de gaz reactionnels pour les reacteurs de reformage a l'oxygene
NO148205C (no) * 1978-03-23 1983-08-24 Laporte Industries Ltd Anordning for elektrisk isolering av ovnskammerveggen i en elektrisk utladningsovn
GB2119278B (en) * 1982-04-13 1987-04-15 Michael Paul Neary Improvements in or relating to a chemical method
US4803056A (en) * 1983-07-22 1989-02-07 Kerr-Mcgee Chemical Corporation System for increasing the capacity of a titanium dioxide producing process
DE3565476D1 (en) * 1984-07-11 1988-11-17 Rhone Poulenc Chimie Process and apparatus for contacting at least two gaseous components reacting at high temperatures
FR2567417A1 (fr) * 1984-07-11 1986-01-17 Rhone Poulenc Chim Base Procede et dispositif pour reaction avec mise en contact d'au moins deux composes gazeux, notamment a haute temperature
DE3913260A1 (de) * 1988-05-19 1989-11-23 Degussa Kugelfoermige, hydrophile kieselsaeure, verfahren zu seiner herstellung und verwendung
US5698177A (en) * 1994-08-31 1997-12-16 University Of Cincinnati Process for producing ceramic powders, especially titanium dioxide useful as a photocatalyst
US7182931B2 (en) * 2003-02-25 2007-02-27 Tronox Llc Process for making titanium dioxide
US20040187525A1 (en) * 2003-03-31 2004-09-30 Coffey Calvin T. Method and apparatus for making soot
DE10320965B4 (de) * 2003-05-09 2012-03-15 Linde Ag Vorrichtung zur reaktiven Umsetzung von Gasströmen
DE102007048553A1 (de) * 2006-12-20 2008-06-26 Kronos International, Inc. Verfahren zur Herstellung von Titandioxid durch Oxidation von Titantetrachlorid
US7968077B2 (en) * 2006-12-20 2011-06-28 Kronos International, Inc. Method for manufacturing titanium dioxide by oxidizing of titanium tetrachloride
CN114231054A (zh) * 2021-11-23 2022-03-25 攀钢集团重庆钒钛科技有限公司 聚碳酸酯专用型钛白粉及其制备方法

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2488440A (en) * 1946-11-30 1949-11-15 Du Pont Titanium dioxide pigment production
US2502347A (en) * 1947-07-11 1950-03-28 Du Pont Production of titanium dioxide
US2721626A (en) * 1951-12-15 1955-10-25 Du Pont Cooling and separating by condensation of hot gaseous suspensions
DE1035306B (de) * 1953-02-26 1958-07-31 Schoppe Fritz Verfahren zum Mischen gasfoermiger, fluessiger oder fester Stoffe sowie zur Herstellung von Reaktions-produkten und Vorrichtung zur Durchfuehrung des Verfahrens
US2799640A (en) * 1953-12-31 1957-07-16 Texas Co Spark discharge activated chemical reactions
US3350171A (en) * 1957-11-20 1967-10-31 British Titan Products Vapour phase oxidation
US3090745A (en) * 1958-05-16 1963-05-21 Berghaus Bernhard Method of and apparatus for producing reactions under electrical action
BE582893A (de) * 1958-09-25 1900-01-01
US3148027A (en) * 1960-02-23 1964-09-08 Laporte Titanium Ltd Vapor phase process for producing metal oxides
US3105742A (en) * 1960-03-16 1963-10-01 Pittsburgh Plate Glass Co Process for producing titanium oxide pigments
US3004137A (en) * 1960-06-07 1961-10-10 Comb And Explosives Res Inc Method and apparatus for the production of high gas temperatures
US3147077A (en) * 1960-06-24 1964-09-01 British Titan Products Production of titanium dioxide
NL285105A (de) * 1961-11-03
FR1355691A (fr) * 1962-02-06 1964-03-20 British Titan Products Procédé d'obtention d'oxydes de métal ou de métalloïde
US3275411A (en) * 1963-04-08 1966-09-27 American Cyanamid Co Plasma production of titanium dioxide

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019211921A1 (de) * 2019-08-08 2021-02-11 Schmid Silicon Technology Gmbh Verfahren und Vorrichtung zur Erzeugung siliziumhaltiger Materialien

Also Published As

Publication number Publication date
DE1206399B (de) 1965-12-09
DE1222896B (de) 1966-08-18
CH456546A (de) 1968-07-31
FI44795C (fi) 1972-01-10
FR1427644A (fr) 1966-02-11
DE1237542B (de) 1967-03-30
BE647140A (de) 1964-10-27
DE1229988B (de) 1966-12-08
US3532462A (en) 1970-10-06
GB1062579A (en) 1967-03-22
FI44795B (de) 1971-09-30
NL6404639A (de) 1964-10-28

Similar Documents

Publication Publication Date Title
AT252876B (de) Verfahren zur Durchführung von Gasphasenreaktionen
AT303239B (de) Verfahren zur Umwandlung von Kohlenwasserstoffen
CH403170A (de) Verfahren zum Einbringen von Reaktionsmitteln
CH448033A (de) Vorrichtung zur Durchführung von chemischen Gasphasenreaktionen
CH434227A (de) Verfahren zur Reinigung von Adipindinitril
CH490475A (de) Verfahren zur selektiven Umwandlung von Komponenten von Kohlenwasserstoffgemischen
CH462792A (de) Verfahren zur Granulierung von Perborat
AT250335B (de) Verfahren zur Reinigung von Terephthalsäure
AT269818B (de) Verfahren zur Reinigung von Olefinen
CH484202A (de) Verfahren zur Reinigung von Interferon
AT249279B (de) Verfahren zur Kettenverlängerung von Aldehyden
AT248985B (de) Verfahren zur Bereitung von Vorteigen
CH519449A (de) Verfahren zur katalytischen Umwandlung von Kohlenwasserstoffen
AT251553B (de) Verfahren zur Isomerisierung von Paraffinkohlenwasserstoffen
CH454327A (de) Verfahren zur Reinigung von Kohlenwasserstoffen
DD38244A1 (de) Verfahren zur Reinigung von Polyesterlösungen
AT259761B (de) Verfahren zur Reinigung von Plasminogen
CH437291A (de) Verfahren zur Reinigung von Pyrrolidon-(2)
CH438259A (de) Verfahren zur katalytischen Oxydation von 1,2,4,5-Tetraalkylaromaten in der Gasphase
AT250300B (de) Verfahren zur katalytischen Spaltung verdampfbarer Kohlenwasserstoffe
CH468959A (de) Verfahren zur Wiedergewinnung von Katalysatoren
AT261099B (de) Verfahren zur Spaltung von Kohlenwasserstoffen
AT249697B (de) Verfahren zur Trocknung von Chlorwasserstoff enthaltenden Gasen
CH427617A (de) Verfahren zur Nachbehandlung von Zigarren
CH448059A (de) Verfahren zur Isomerisierung von Dichlorbutenen