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WO1993002828A2 - Gaz enrichi pour un chalumeau et son procede de preparation et d'utilisation - Google Patents

Gaz enrichi pour un chalumeau et son procede de preparation et d'utilisation Download PDF

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Publication number
WO1993002828A2
WO1993002828A2 PCT/US1991/009096 US9109096W WO9302828A2 WO 1993002828 A2 WO1993002828 A2 WO 1993002828A2 US 9109096 W US9109096 W US 9109096W WO 9302828 A2 WO9302828 A2 WO 9302828A2
Authority
WO
WIPO (PCT)
Prior art keywords
gas
torch
fortified
additive
base
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.)
Ceased
Application number
PCT/US1991/009096
Other languages
English (en)
Other versions
WO1993002828A3 (fr
Inventor
Frank M. Hall
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO1993002828A2 publication Critical patent/WO1993002828A2/fr
Publication of WO1993002828A3 publication Critical patent/WO1993002828A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel

Definitions

  • the present invention relates to torch gas, that is, gas for use in cutting and/or welding torches fortified by the addition of an additive or conditioner.
  • the Medsker patent proposed a mixture of methyl borate and hexane as an additive for a gaseous fuel.
  • the principal torch gas used heretofore has been acetylene which is comparatively expensive, difficult to store and to transport, requires the use of almost pure oxygen with it and forms persistently adherent scoria when used for cutting ferrous metal.
  • a principal object of this invention to provide a fortified torch gas having characteristics superior to those of acetylene, especially for cutting ferrous metal, and also for welding.
  • a particular object is to provide a torch gas which will have high flame temperature and intense heating capability.
  • a further object is to provide torch gas that can be stored and transported easily and economically. Another object is to provide a torch gas having a base gas which is readily available in almost the entire world, can be provided more economically and is easy to fortify for enhancing its attributes. It is also an object to provide a torch gas enabling ferrous metal to be cut faster and cleaner.
  • Another object is to provide a gas that can be used by torches for cutting under water at considerable depths.
  • An additional object is to provide a gas that can be used for torch cutting more economically because it will combine effectively with oxygen containing a higher proportion of adulterating gases which cannot be used with acetylene.
  • Liquefied petroleum gas is the preferred base gas for the fortified torch gas of the present invention because of its high butane and propane content.
  • Both the n_-butane and isobutane isomers of butane are usually present in LPG, but a substantial amount of butane may have been removed from LPG sold as fuel because of the demand from industry for butane derivatives, in which case the LPG is made up largely of propane. It is, however, desirable that there be a reasonable proportion of butane in the LPG, such as from 5% to 40%.
  • the additive or conditioner used to fortify the base gas is methyl etnyl ketone, otherwise known as 2-butanone, having the formula CH3COCH2CH3.
  • This additive is a liquid with a boiling point of 70.6° C. and a specific gravity of 0.805 at 20° C.
  • LPG must be stored under pressure to keep it in a liquid state, but relatively heavy pressurized storage tanks and handling equipment for LPG is commercially practical and customary. Without being fortified, LPG is not very effective for torch cutting and welding, not nearly as effective as acetylene gas, but by enriching the base gas with methyl ethyl ketone as an additive the flame temperature is substantially increased and the heating capability is greatly enhanced.
  • Methyl ethyl ketone is a liquid at normal temperatures and is supplied to the storage tank in which the LPG is to be stored or transported. It is quite practical to supply the additive to standard 55- gallon drums.
  • the additive is supplied in conjunction with a catalyst, preferably activated carbon in the form of powder, granules or pellets.
  • the activated carbon is amorphous, preferably having been produced from coal or petroleum coke.”
  • Alternative catalysts that can be used are platinum, cupric oxide and granular silver carried by a suitable carrier.
  • the amount of additive used will depend on the extent to which it is desired to enhance the characteristics of the base gas, but the amount would be 6% to 20% of the base gas by weight, preferably 10% to 15%.
  • the amount of activated carbon used is not critical, but a sufficient amount should be placed in the bottom of a storage container so that the additive will be mixed with the base gas when it is supplied to the container under pressure. An amount of such catalyst between 1% and 5% of the weight of the additive would be satisfactory.
  • the resulting mixture of base gas and conditioner will be azeotropic so that the fortified torch gas will be homogeneous when it is released from the storage container to the torch.
  • an acetylene torch oxygen that is in substantially pure form, such as at least 99% oxygen by volume. Satisfactory cutting temperatures can be provided by mixing with the fortified base gas of the present invention less pure oxygen such as having a purity of approximately 90%, the balance of which can be nitrogen, carbon dioxide and other adulterants. Even when oxygen of 90% purity is used, the flame temperature of base gas LPG of approximately 5,000° F. can be raised to approximately 5,800° F. to 6,000° F. by use of the base gas LPG fortified according to the present invention.
  • Such impure oxygen can be produced economically by compressing air to about 4,000 psi, chilling it to minus 360° F. which liquefies the air and then allowing the temperature of the liquefied air to rise gradually while venting the container to release the nitrogen component of the liquefied air which vaporizes at minus 320° F. leaving the oxygen in liquid form.
  • the nitrogen content of. air is removed by zeolite resulting in oxygen of 90% to 95% purity.
  • An advantage of using the fortified base gas of the present invention over acetylene for cutting ferrous metal is that a clean precise kerf is obtained.
  • Oxyacetylene cutting produces a hard scoria persistently adherent to the work which increases the heating required and usually must subsequently be chipped off the work.
  • Utilization of the fortified torch gas of the present invention produces a soft friable scoria which is sloughed off from the work and out of the kerf as the cutting progresses to leave a narrower clean kerf with virgin metal along opposite margins of the kerf.
  • a particular advantage which the fortified torch gas of the present invention has is that it can be used for flame cutting under water to a depth of 300 feet.
  • the use of the oxyacetylene torch is limited to 20 feet under water because at pressures to which it would be necessary to subject the gas to enable it to be dispensed to the cutting torch at greater depths the acetylene will explode. Consequently, the only alternative that has been available for cutting under water at depths greater than about 20 feet prior to the present invention has been the use of a carbon arc, the action of which is slow and the use of which is dangerous.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Catalysts (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

On enrichit du gaz hydrocarbure de base, de préférence du gaz de pétrole liquéfié (G.P.L), en ajoutant de 6 % à 20 %, de préférence de 10 % à 15 % de cétone éthyle méthyle avec du charbon actif comme catalyseur pour produire un mélange azéotrope. On peut découper des métaux ferreux même sous l'eau en mélangeant le gaz enrichi du chalumeau avec de l'oxygène dont la pureté ne dépasse pas 90 %.
PCT/US1991/009096 1991-07-26 1991-12-04 Gaz enrichi pour un chalumeau et son procede de preparation et d'utilisation Ceased WO1993002828A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US736,674 1985-05-22
US73667491A 1991-07-26 1991-07-26

Publications (2)

Publication Number Publication Date
WO1993002828A2 true WO1993002828A2 (fr) 1993-02-18
WO1993002828A3 WO1993002828A3 (fr) 1993-03-18

Family

ID=24960834

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1991/009096 Ceased WO1993002828A2 (fr) 1991-07-26 1991-12-04 Gaz enrichi pour un chalumeau et son procede de preparation et d'utilisation

Country Status (4)

Country Link
AU (1) AU9105891A (fr)
SG (1) SG44888A1 (fr)
WO (1) WO1993002828A2 (fr)
ZA (1) ZA925571B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001092443A1 (fr) * 2000-05-29 2001-12-06 Gases Medicos E Industriales Matheson Sociedad Anonima Hydrocarbure a renforcements multiples pour procedes de fusion et de fonte

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US968350A (en) * 1909-12-11 1910-08-23 Electro Metallurg Co Blowpipe and method of operating the same.
US2210640A (en) * 1939-03-28 1940-08-06 Swafford John Lex Under water cutting torch
US2281910A (en) * 1940-04-13 1942-05-05 William L Ulmer Flux
US2411759A (en) * 1944-02-04 1946-11-26 Samuel Harry White Gas mixture
US3591355A (en) * 1968-07-29 1971-07-06 I G Corp Industrial gas

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001092443A1 (fr) * 2000-05-29 2001-12-06 Gases Medicos E Industriales Matheson Sociedad Anonima Hydrocarbure a renforcements multiples pour procedes de fusion et de fonte

Also Published As

Publication number Publication date
SG44888A1 (en) 1997-12-19
ZA925571B (en) 1993-04-28
AU9105891A (en) 1993-03-02
WO1993002828A3 (fr) 1993-03-18

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