[go: up one dir, main page]

CH433108A - Method for preventing oxidation of articles placed in a hermetically sealed container - Google Patents

Method for preventing oxidation of articles placed in a hermetically sealed container

Info

Publication number
CH433108A
CH433108A CH189665A CH189665A CH433108A CH 433108 A CH433108 A CH 433108A CH 189665 A CH189665 A CH 189665A CH 189665 A CH189665 A CH 189665A CH 433108 A CH433108 A CH 433108A
Authority
CH
Switzerland
Prior art keywords
desiccant
catalyst
compound
water vapor
container
Prior art date
Application number
CH189665A
Other languages
French (fr)
Inventor
Babtie Cooper Graham
Original Assignee
Catalytic Gas Pack Limited
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 Catalytic Gas Pack Limited filed Critical Catalytic Gas Pack Limited
Publication of CH433108A publication Critical patent/CH433108A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F15/00—Other methods of preventing corrosion or incrustation
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
    • A23B2/00—Preservation of foods or foodstuffs, in general
    • A23B2/70—Preservation of foods or foodstuffs, in general by treatment with chemicals
    • A23B2/704—Preservation of foods or foodstuffs, in general by treatment with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor
    • A23B2/708—Preservation of foods or foodstuffs, in general by treatment with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor in a controlled atmosphere, e.g. partial vacuum, comprising only CO2, N2, O2 or H2O
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • 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
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/0006—Controlling or regulating processes
    • B01J19/002—Avoiding undesirable reactions or side-effects, e.g. avoiding explosions, or improving the yield by suppressing side-reactions
    • 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
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/14—Production of inert gas mixtures; Use of inert gases in general
    • 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
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/16—Preventing evaporation or oxidation of non-metallic liquids by applying a floating layer, e.g. of microballoons
    • 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
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
    • 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
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
    • B01J23/42—Platinum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B25/00—Packaging other articles presenting special problems
    • B65B25/001—Packaging other articles presenting special problems of foodstuffs, combined with their conservation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/24—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
    • B65D81/26—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators
    • B65D81/266—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators for absorbing gases, e.g. oxygen absorbers or desiccants
    • B65D81/268—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators for absorbing gases, e.g. oxygen absorbers or desiccants the absorber being enclosed in a small pack, e.g. bag, included in the package
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
    • C23F11/02—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in air or gases by adding vapour phase inhibitors
    • 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
    • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/18—Carbon

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Metallurgy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Zoology (AREA)
  • Wood Science & Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
  • Drying Of Gases (AREA)
  • Catalysts (AREA)

Description

         

  
 



  Procédé pour empêcher   Poxydation    d'articles placés dans un récipient fermé hermétiquement
 La présente invention se rapporte à l'emballage hermétique d'articles dans des récipients imperméables, par exemple en métal ou en matière plastique, qui sont étanches à l'eau ou imperméables à l'humidité, rigides ou flexibles. L'invention a pour but principal de procurer un procédé pour empêcher l'oxydation de ces articles dans ces récipients pendant le transport et le stockage.



   La présente invention a donc pour objet un procédé pour empêcher l'oxydation d'articles placés dans un récipient fermé hermétiquement. Ce procédé est caractérisé en ce que   l'on    utilise un récipient contenant un catalyseur, un composé qui, en présence du catalyseur, réagit avec l'oxygène présent dans le récipient en produisant de la vapeur d'eau, et un déshydratant qui absorbe la vapeur d'eau, la quantité de catalyseur et celle dudit composé étant suffisantes pour que sensiblement la totalité de l'oxygène présent dans le récipient soit transformée en vapeur d'eau, et la quantité de déshydratant étant suffisante pour qu'il absorbe toute la vapeur d'eau produite par ladite réaction.



   Le catalyseur peut consister en charbon platiné et le déshydratant peut consister en sulfate de calcium. Dans une forme d'exécution préférée de l'invention, le catalyseur et le déshydratant sont mélangés et sont placés dans un unique récipient poreux.



   Le composé peut par exemple être de l'alcool méthylique ou du formiate de méthyle.



   Pour mettre en oeuvre le procédé selon l'invention, on place les articles, par exemple des roulements à billes ou à rouleaux, des instruments scientifiques ou du caoutchouc naturel, dans un récipient qui s'ouvre par le haut, par exemple une boîte en métal, et on place dans ce récipient un petit sachet en matière plastique poreuse, contenant un mélange d'un catalyseur approprié, qui est de préférence du charbon platiné, et d'un déshydratant.



  On introduit ensuite une petite quantité d'alcool méthylique dans le récipient de toute manière appropriée, par exemple au moyen d'une burette ou d'une seringue ou par pulvérisation. On ferme alors l'ouverture supérieure du récipient au moyen de l'organe de fermeture prévu à cet effet, de telle manière que le récipient soit rendu hermétique. Une réaction se produit rapidement et est probablement terminée en l'espace de quelques heures, la vapeur d'eau produite par cette réaction étant absorbée par le déshydratant.   I1    est avantageux que le déshydratant soit aussi proche que possible de la source de production de vapeur d'eau, sans quoi une condensation temporaire pourrait se produire sur les articles se trouvant dans le récipient.

   Pour cette raison, il est préférable que le catalyseur et le déshydratant soient mélangés et contenus dans une enveloppe poreuse unique. Le procédé décrit ci-dessus permet de créer et de maintenir dans le récipient une atmosphère contenant moins de 1   O/o    d'oxygène. Dans ces conditions une oxydation des articles ne peut pas se produire.



     I1    est entendu que la quantité de catalyseur et celle du composé sont choisies en fonction du volume du récipient de manière à être suffisantes pour que sensiblement la totalité de l'oxygène présent dans le récipient soit transformée en vapeur d'eau, et que la quantité de déshydratant est choisie de manière que toute la vapeur d'eau produite par la réaction soit absorbée.



   N'importe quel déshydratant approprié peut être employé, par exemple du gel de silice ou du charbon actif, et le choix du déshydratant peut dépendre du type de composé employé. Ainsi, lorsque le composé employé est l'alcool méthylique, il est préférable que le déshydratant soit du sulfate de calcium, car il est probable que le gel de silice ou le charbon actif puisse absorber l'alcool méthylique fortement polaire, et soit ainsi susceptible de bloquer la réaction désirée ou d'en diminuer la vitesse.



  Il est également entendu que, lors du choix du déshydratant, on veillera à éviter l'emploi d'un déshydratant qui, comme le chlorure de calcium, se combine chimique  ment avec le composé (alcool méthylique), ou l'emploi d'un déshydratant qui, comme le pentoxyde de phosphore, les alcalis caustiques et   d'autres    déshydratants solubles, produit un résidu fortement corrosif.



   Si désiré, le composé employé peut être le formiate de méthyle, mais l'alcool méthylique est préféré, car le formiate de méthyle nécessitè l'emploi d'une plus grande quantité de catalyseur.



   D'autre part, le catalyseur peut être un métal autre que le platine, par exemple il peut être du palladium ou du rhodium, et le support du catalyseur peut être autre que du charbon, par exemple il peut être de l'alumine, de la silice ou du carbonate de calcium.



   Dans le cas des articles ferreux, on peut obtenir une protection complémentaire contre l'oxydation en ajoutant au composé un agent empêchant ou réduisant la corrosion. Ces inhibiteurs chimiques ont pour effet d'entourer les articles de leur vapeur, qui inhibe ainsi la corrosion. Certains nitrites organiques, par exemple le nitrite de dicyclohexylamine, sont des exemples de telles substances, qui sont connues sous le nom d'inhibiteurs en phase vapeur. Ces inhibiteurs sont facilement solubles dans l'alcool méthylique ou dans le formiate de méthyle et peuvent donc être introduits dans le récipient avec ceux-ci.
  



  
 



  Method for preventing oxidation of articles placed in a hermetically sealed container
 The present invention relates to the hermetic packaging of articles in impermeable containers, for example made of metal or plastic, which are watertight or moisture impermeable, rigid or flexible. The main object of the invention is to provide a method for preventing the oxidation of these articles in these containers during transport and storage.



   The present invention therefore relates to a method for preventing the oxidation of articles placed in a hermetically sealed container. This process is characterized in that one uses a vessel containing a catalyst, a compound which, in the presence of the catalyst, reacts with the oxygen present in the vessel to produce water vapor, and a desiccant which absorbs the water. water vapor, the quantity of catalyst and that of said compound being sufficient so that substantially all of the oxygen present in the container is converted into water vapor, and the quantity of desiccant being sufficient for it to absorb all the water vapor produced by said reaction.



   The catalyst may be platinized carbon and the desiccant may be calcium sulfate. In a preferred embodiment of the invention, the catalyst and the desiccant are mixed and are placed in a single porous container.



   The compound can, for example, be methyl alcohol or methyl formate.



   To carry out the method according to the invention, the articles, for example ball or roller bearings, scientific instruments or natural rubber, are placed in a container which opens from the top, for example a box made of metal, and in this container is placed a small bag of porous plastic material, containing a mixture of a suitable catalyst, which is preferably platinized carbon, and a desiccant.



  A small amount of methyl alcohol is then introduced into the container in any suitable manner, for example by means of a burette or syringe or by spraying. The upper opening of the container is then closed by means of the closure member provided for this purpose, so that the container is made airtight. A reaction occurs quickly and is probably complete within a few hours, with the water vapor produced by this reaction being absorbed by the desiccant. It is advantageous if the desiccant is as close as possible to the source of water vapor generation, otherwise temporary condensation may occur on the articles in the container.

   For this reason, it is preferable that the catalyst and the desiccant are mixed and contained in a single porous shell. The method described above makes it possible to create and maintain in the container an atmosphere containing less than 1 O / o oxygen. Under these conditions oxidation of the articles cannot occur.



     It is understood that the amount of catalyst and that of the compound are chosen as a function of the volume of the container so as to be sufficient so that substantially all of the oxygen present in the container is converted into water vapor, and that the amount desiccant is chosen so that all the water vapor produced by the reaction is absorbed.



   Any suitable desiccant can be employed, for example silica gel or activated carbon, and the choice of desiccant may depend on the type of compound employed. Thus, when the compound employed is methyl alcohol, it is preferable that the desiccant is calcium sulfate, since it is likely that the silica gel or the activated carbon can absorb the highly polar methyl alcohol, and thus be susceptible block the desired reaction or reduce its speed.



  It is also understood that, when choosing the desiccant, care should be taken to avoid the use of a desiccant which, like calcium chloride, combines chemically with the compound (methyl alcohol), or the use of a desiccant which, like phosphorus pentoxide, caustic alkalis and other soluble desiccants, produces a strongly corrosive residue.



   If desired, the compound employed can be methyl formate, but methyl alcohol is preferred, since methyl formate requires the use of more catalyst.



   On the other hand, the catalyst can be a metal other than platinum, for example it can be palladium or rhodium, and the catalyst support can be other than carbon, for example it can be alumina, of silica or calcium carbonate.



   In the case of ferrous articles, additional protection against oxidation can be obtained by adding a corrosion preventing or reducing agent to the compound. These chemical inhibitors have the effect of surrounding articles with their vapor, which thus inhibits corrosion. Some organic nitrites, for example dicyclohexylamine nitrite, are examples of such substances, which are known as vapor phase inhibitors. These inhibitors are easily soluble in methyl alcohol or in methyl formate and can therefore be introduced into the container with them.

Claims (1)

REVENDICATION Procédé pour empêcher l'oxydation d'articles placés dans un récipient fermé hermétiquement, caractérisé en ce que l'on utilise un récipient contenant un catalyseur, un composé qui, en présence du catalyseur, réagit avec l'oxygène présent dans le récipient en produisant de la vapeur d'eau, et un déshydratant qui absorbe la vapeur d'eau, la quantité de catalyseur et celle dudit composé étant suffisantes pour que sensiblement la totalité de l'oxygène présent dans le récipient soit transformée en vapeur d'eau, et la quantité de déshydratant étant suffisante pour qu'il absorbe toute la vapeur d'eau produite par ladite réaction. CLAIM A method of preventing oxidation of articles placed in a hermetically sealed container, characterized in that a container containing a catalyst, a compound which, in the presence of the catalyst, reacts with the oxygen present in the container to produce water vapor, and a desiccant which absorbs water vapor, the amount of catalyst and that of said compound being sufficient so that substantially all of the oxygen present in the vessel is converted to water vapor, and the quantity of desiccant being sufficient for it to absorb all the water vapor produced by said reaction. SOUS-REVENDICATIONS 1. Procédé selon la revendication, caractérisé en ce que le catalyseur est du charbon platiné. SUB-CLAIMS 1. Method according to claim, characterized in that the catalyst is platinized carbon. 2. Procédé selon la revendication ou la sous-revendication 1, caractérisé en ce que le déshydratant est du sulfate de calcium. 2. Method according to claim or sub-claim 1, characterized in that the desiccant is calcium sulfate. 3. Procédé selon la revendication ou la sous-revendication 1 ou 2, caractérisé en ce que le catalyseur et le déshydratant sont mélangés ensemble et placés dans une unique enveloppe poreuse. 3. Process according to claim or sub-claim 1 or 2, characterized in that the catalyst and the desiccant are mixed together and placed in a single porous envelope. 4. Procédé selon la revendication, caractérisé en ce que ledit composé est l'alcool méthylique. 4. Method according to claim, characterized in that said compound is methyl alcohol. 5. Procédé selon la revendication, caractérisé en ce qu'un inhibiteur en phase vapeur est dissous dans ledit composé. 5. Method according to claim, characterized in that a vapor phase inhibitor is dissolved in said compound.
CH189665A 1964-02-13 1965-02-12 Method for preventing oxidation of articles placed in a hermetically sealed container CH433108A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB6153/64A GB1014256A (en) 1964-02-13 1964-02-13 Improvements in or relating to the hermetic packing of articles in non-permeable containers

Publications (1)

Publication Number Publication Date
CH433108A true CH433108A (en) 1967-03-31

Family

ID=9809379

Family Applications (1)

Application Number Title Priority Date Filing Date
CH189665A CH433108A (en) 1964-02-13 1965-02-12 Method for preventing oxidation of articles placed in a hermetically sealed container

Country Status (4)

Country Link
BE (1) BE659680A (en)
CH (1) CH433108A (en)
GB (1) GB1014256A (en)
NL (1) NL6501572A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2447281B (en) * 2007-03-07 2012-06-27 Susie Lind Method of domestic rubbish decomposition reduction

Also Published As

Publication number Publication date
NL6501572A (en) 1965-08-16
BE659680A (en) 1965-08-12
GB1014256A (en) 1965-12-22

Similar Documents

Publication Publication Date Title
US2758932A (en) Deoxygenating process and product
JP5605744B2 (en) Stabilized chlorine dioxide agent and stable generation method of chlorine dioxide
CN103502141B (en) The generation method of chlorine dioxide agent and chlorine dioxide
US2245495A (en) Oxygen supplying composition
US6073771A (en) Container for storing sulfur-containing compounds
CH433108A (en) Method for preventing oxidation of articles placed in a hermetically sealed container
US1408757A (en) Transportation of hydrocyanic acid
JP5722843B2 (en) 1,3-Diiodohydantoin compound and method for producing the same
US3016336A (en) Deoxygenating method and product
US2719660A (en) Method of preserving packaged materials
FR2645512A1 (en) Method for removing gases from airtight packaging
JP2007504089A5 (en)
FR2837830A1 (en) SELF-HEATING COMPOSITION BASED ON ORTHOPHOSPHORIC ACID IMPREGNATED ON A LARGE POROSITY MINERAL OXIDE, METHOD FOR PREPARING SAME AND USE THEREOF
JP6433007B1 (en) Chlorine dioxide gas generation method, liquid composition, gel composition, and chlorine dioxide gas generation kit
RU2704971C1 (en) Method of producing clathrate hydrates for storage and transportation of gases
US3514963A (en) Handling and storage of ozone
EP0091701B1 (en) Mixture for preparing compositions absorbing or accumulating calories
JPS60252658A (en) Rust-proofing material
BE393403A (en)
CH254796A (en) Process for the production in a closed container and in the presence of an aqueous liquid, of a permanent pressure by evolution of a gas within said liquid.
BE642379A (en)
RU2033185C1 (en) Compound for disinfection and deodorization
US2015406A (en) Generation of toxic gas
RU2282651C1 (en) Exothermic composition
JPS5926542B2 (en) How to increase the moisture resistance of can containers