US3796554A - Welding gas - Google Patents

Welding gas Download PDF

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Publication number
US3796554A
US3796554A US00245488A US3796554DA US3796554A US 3796554 A US3796554 A US 3796554A US 00245488 A US00245488 A US 00245488A US 3796554D A US3796554D A US 3796554DA US 3796554 A US3796554 A US 3796554A
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US
United States
Prior art keywords
percent
molar percent
propadiene
methylacetylene
fuel gas
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Expired - Lifetime
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US00245488A
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English (en)
Inventor
H Meinass
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Individual
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Individual
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Priority claimed from DE19712119152 external-priority patent/DE2119152C3/de
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
    • 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
    • C10L3/02—Compositions containing acetylene

Definitions

  • the C and C.,hydrocarbons have the function ofmaintaining the concentration of the primary fuel components in-both the gas and liquid phases at below the explosive limit (75-78 molar percent) over the entire course of removal from the tank.
  • This gaseous mixture also exhibits advantageous combustion properties, i. e., it has a high heating value, a high velocity of flame propagation and produces a high flame temperature upon combustion with oxygen.
  • a disadvantage of thisgaseous mixture resides in the fact that, when withdrawn from the gaseous phase, the lowerboiling components evaporate at a faster rate than the higher-boiling substances, so that the relative proportion of the higher-boiling components increases in the liquid remaining in the tank as well as in the gaseous phase in equilibrium therewith.
  • the more reactive, but higherboiling primary fuels methylacetylene and propadiene
  • the concentration of the highly reactive primary fuels is increased generally by 30 molar percent or more in the gaseous phase from beginning toend.
  • the concentration of methylacetylene and propadiene must not exceed the explosive limit, it is essential to provide these components in a sufficiently low concentration in the filled tank so that the mixture remains stable during the entire course of withdrawal. Because of this necessary precaution, the concentration of primary fuels is low during a significant period at the early stages of withdrawal, and the resultant burning characteristics of the so evolved gas are relatively poor.
  • a fuel gas mixture containing, in addition to high proportions of C hydrocarbons, 76-88 molar percent of methylacetylene andlor propadiene.
  • acetylene exhibits excellent combustion properties, in particular, a high flame propagation velocity and a high flame temperature. Moreover, since acetylene evaporates at a faster rate than the. remaining components of the mixture, the presence of a sufficient amount of primary fuel in the gaseous mixture is maintained at the beginning of and also throughout the withdrawalof gas. As the gaseous phase is removed from the container, the relativeproportion of acetylene decreases approximately to the extent that the proportion of methylacetylene and/or propadiene increases.
  • FIGS. 1 and 2 are graphs wherein the concentration -I( of the gaseous phase in equilibrium with liquid fuel gas mixture of a given composition'is plotted as the ordinate against the quantity M withdrawn from the tank in the gaseous phase as the abscissa, thev values being respectively molar percent.
  • the concentration of the primary fuels (acetylene, propadiene, and methylacetylene) in the gaseous phase varies according to FIG. 1 between 64 and 73 molar percent, according to FIG. ,2 between 65 and .70 molar percent.
  • the highest value and the lowest value for the concentration of the primary fuels in the gaseous'phase differ during the entire withdrawal period only be 9 and 5 molar percent, respectively. Consequently, by the present invention, it is possible to select the concentration of primary fuels so that it is substantially uniformly high and yet safely below the explosive limit. In this way, the excellent combustion properties of the primary gaseous components tending toward spontaneous decomposition can be utilized to their full extent.
  • the tanks can be emptied completely without danger, and on the other hand, the combustion properties of the gaseous mixture remain practically unchanged during the entire withdrawal period.
  • composition of the gaseous mixture drawn off from the vessel may, nevertheless, differ slightly depending on the velocity with which it is drawn off. So the mixtures of FIGS. 1 and 2 may assume the following compositions (on a molar percent basis) during a withdrawal period:
  • acetylene-containing fuel gas mixtures do not differ significantly from acetylene-free mixtures, as long as the total concentration of primary fuels remains the same. In any case, it is preferred that the concentration of methylacetylene and/or propadiene does not exceed 60 molar percent, in total.
  • a preferred fuel gas mixture consists of 5-10 iiii? l5 paraffinic and/or olefinic C hydrocarbons, and
  • compositions of this invention can be produced conventionally by simple blending of the various components in the gaseous or liquid phase.
  • the composition is usually stored in .a heavy walled pressure vessel, e.g a gas cylinder, under a pressure ranging from 85 to 170 psi at 20 C when the vessel is full.
  • the fuel can be conventionally employed in the heating, cutting, welding etc. of metals, and for other uses where the combustion characteristics of the gas can be beneficially utilized.
  • the filled pressure vessels When sold to consumers, the filled pressure vessels contain the mixture mainly in the liquid phase with only a very small amount in the gaseous phase, said mixture having the following range of compositions on a molar percent basis.
  • a fuel gas suitable for the heating, melting, welding, and cutting of metals containing on a molar basis lpercent acetylene; 23-90 molar percent of a member selected from the group consisting of propane, propylene, cyclopropane, and mixtures thereof; 8-75 percent of a member selected from the group consisting of methylacetylene, propadiene, and mixtures thereof; and l-20 percent of a member selected from the group consisting of n-butanefisobutane, l butene, isobutene, 1,3-butadiene and mixtures thereof.
  • a vessel under a pressure of 85-170 psi at 20C A General Preferred A. Acetylene l 35 5 10 B. Propadiene and/or methylacetylene 8 75 50 60 C.2A+B 35-75 60-70 D. Propane, propylene and/or 23 20 30 cyclopropane E. n-Butane, isobutane, l-butene, isobutene, l 20 S 15 and/or 1,3-butadiene F.2D+E.

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Gas Separation By Absorption (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
US00245488A 1971-04-20 1972-04-19 Welding gas Expired - Lifetime US3796554A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712119152 DE2119152C3 (de) 1971-04-20 Brenngasgemisch

Publications (1)

Publication Number Publication Date
US3796554A true US3796554A (en) 1974-03-12

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US00245488A Expired - Lifetime US3796554A (en) 1971-04-20 1972-04-19 Welding gas

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US (1) US3796554A (US20110009641A1-20110113-C00116.png)
AT (1) AT336757B (US20110009641A1-20110113-C00116.png)
BE (1) BE782034A (US20110009641A1-20110113-C00116.png)
CH (1) CH569077A5 (US20110009641A1-20110113-C00116.png)
DK (1) DK130015B (US20110009641A1-20110113-C00116.png)
FR (1) FR2133907B1 (US20110009641A1-20110113-C00116.png)
GB (1) GB1361711A (US20110009641A1-20110113-C00116.png)
IT (1) IT951852B (US20110009641A1-20110113-C00116.png)
NL (1) NL7205342A (US20110009641A1-20110113-C00116.png)
SE (1) SE369726B (US20110009641A1-20110113-C00116.png)
ZA (1) ZA722570B (US20110009641A1-20110113-C00116.png)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4426207A (en) 1982-03-01 1984-01-17 L'air Liquide-Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Stable ternary cryogenic fuel having density in the gaseous state less than that of air
US4490152A (en) * 1981-03-16 1984-12-25 L'air Liquide-Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Ternary fuel having fairly constant acetylene content in the liquid and vapor phase
FR2793494A1 (fr) * 1999-05-12 2000-11-17 Air Liquide Melange gazeux combustible et son utlisation en oxycoupage
US6187067B1 (en) * 1998-01-16 2001-02-13 Praxair Technology, Inc. Additivated gas for oxy-cutting and/or heating applications
US20060129009A1 (en) * 2004-11-25 2006-06-15 Tomomasa Nishikawa Fuel, gas, combustion type power tool driven by the fuel gas, and compressed gas container for the combustion type power tool
US20150034705A1 (en) * 2013-07-31 2015-02-05 Goodrich Corporation Pressure welding using propylene

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2774693B1 (fr) * 1998-02-12 2003-09-26 Air Liquide Melange gazeux combustible, notamment pour chalumeau d'oxycoupage

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3226213A (en) * 1962-11-23 1965-12-28 Dow Chemical Co Fuel gas composition
US3352652A (en) * 1964-01-21 1967-11-14 Dow Chemical Co Method of producing fuel gas
US3706542A (en) * 1970-10-13 1972-12-19 Ici Ltd Fuel gas for cutting operations

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3226213A (en) * 1962-11-23 1965-12-28 Dow Chemical Co Fuel gas composition
US3352652A (en) * 1964-01-21 1967-11-14 Dow Chemical Co Method of producing fuel gas
US3706542A (en) * 1970-10-13 1972-12-19 Ici Ltd Fuel gas for cutting operations

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4490152A (en) * 1981-03-16 1984-12-25 L'air Liquide-Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Ternary fuel having fairly constant acetylene content in the liquid and vapor phase
US4426207A (en) 1982-03-01 1984-01-17 L'air Liquide-Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Stable ternary cryogenic fuel having density in the gaseous state less than that of air
US6187067B1 (en) * 1998-01-16 2001-02-13 Praxair Technology, Inc. Additivated gas for oxy-cutting and/or heating applications
FR2793494A1 (fr) * 1999-05-12 2000-11-17 Air Liquide Melange gazeux combustible et son utlisation en oxycoupage
WO2000070000A1 (fr) * 1999-05-12 2000-11-23 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Melange gazeux combustible et son utilisation en oxycoupage
US20060129009A1 (en) * 2004-11-25 2006-06-15 Tomomasa Nishikawa Fuel, gas, combustion type power tool driven by the fuel gas, and compressed gas container for the combustion type power tool
US8205777B2 (en) * 2004-11-25 2012-06-26 Hitachi Koki Co., Ltd. Fuel, gas, combustion type power tool driven by the fuel gas, and compressed gas container for the combustion type power tool
US20150034705A1 (en) * 2013-07-31 2015-02-05 Goodrich Corporation Pressure welding using propylene
US9156102B2 (en) * 2013-07-31 2015-10-13 Goodrich Corporation Pressure welding using propylene

Also Published As

Publication number Publication date
DK130015B (da) 1974-12-09
DE2119152B2 (de) 1977-01-27
ATA317572A (de) 1976-09-15
FR2133907B1 (US20110009641A1-20110113-C00116.png) 1976-10-29
BE782034A (fr) 1972-07-31
NL7205342A (US20110009641A1-20110113-C00116.png) 1972-10-24
ZA722570B (en) 1973-01-31
DE2119152A1 (de) 1972-11-09
CH569077A5 (US20110009641A1-20110113-C00116.png) 1975-11-14
FR2133907A1 (US20110009641A1-20110113-C00116.png) 1972-12-01
DK130015C (US20110009641A1-20110113-C00116.png) 1975-05-26
AT336757B (de) 1977-05-25
IT951852B (it) 1973-07-10
SE369726B (US20110009641A1-20110113-C00116.png) 1974-09-16
GB1361711A (en) 1974-07-30

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