Classifications

• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M1/00—Liquid compositions essentially based on mineral lubricating oils or fatty oils; Their use as lubricants
  • C10M1/08—Liquid compositions essentially based on mineral lubricating oils or fatty oils; Their use as lubricants with additives
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
  • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
  • C10M2205/026—Butene
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
  • C10M2205/18—Natural waxes, e.g. ceresin, ozocerite, bees wax, carnauba; Degras
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
  • C10M2207/40—Fatty vegetable or animal oils
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
  • C10M2207/40—Fatty vegetable or animal oils
  • C10M2207/404—Fatty vegetable or animal oils obtained from genetically modified species
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2040/00—Specified use or application for which the lubricating composition is intended
  • C10N2040/135—Steam engines or turbines

Definitions

• This invention relates to steam cylinder lubricents, and relates particularly to a new steam cylinder lubricant having superior adhesive properties to cylinder walls, and superior lubricating properties.
• the present invention provides-a new cylinder oil comprising a lubricating stock in which there is dissolved a very small quantity of polyisobutylene.
• This material shows the unexpected property of firm adhesion to the cylinder walls, such that it is resistant to the washing action of the steam, and the only removal of the; lubricating film is that occasioned by the rubbing movement of the piston.
• the present oil is 'Polyisobutylene is produced by polymerizing isobutylene at. temperatures below 20 C. and
• the reaction produces a substantially saturated polymerof isobutylene which may have a molecular weight ranging from about 1,000 to 250,000 or more, according to the lowness of the temperature at which polymerization occurs and the purity of the isobutylene.
• the polymer material used for the present purpose preferably has a molecular weight in excess of 40,000.
• the mineral oil used for the present invention is a cylinder oil. It may be derived from the various crudes from which cylinder oils are normally prepared, for example, from Pennsylvania or Mid-Continent, or even naphthenic base crudes.
• the oil may be a steam reduced Penn'- sylvania or may be an overhead stock, for example as producedby distillation under vacuum.
• the oil will have a viscosity of at least 100 seconds Saybolt at 210 F. and more viscous oils, for example, from 150 to 220 seconds S'aybolt at 210 F. are employed with increased temperature of cylinder operation.
• the polyisobutylene mentioned above is added in a small proportion.
• the amount is less than .25 of 1% and frequently as little as .02 of 1% is suflicient.
• the amount may be in the lower end of the range indicated, because wet steam appears to give the much more efiicient than-ordinary cylinder oils,
• the amount of polymer is proportion'ately lower than with lower molecular weight products.
• polyisobutylene While the polyisobutylene is soluble in all proportions in the cylinder oil, it dissolves slowly because of the high viscosityof the oil and it is generally preferable to dissolve the polymer in less viscous lubricating oils in a 10% solution, for example to add this to the cylinder oils so as toincorporate the proper amount of polymer.
• the adhering efiect of the lubricant to cylinder walls occurs whether the steam is saturated orsuperheated; and the effect remains dun'ng shut-down periods, with the result that when the engine is re-started, there is at the beginning of the re-starting an adequate film of oil covering the cylinder surfaces which permits of re-starting under conditions of complete lubrication, and avoids the previously inescapable condition of unlubricated starting.
• a 240 H. P. Corliss valve engine with a 15" bore and 36" stroke is ordinarily operated at 150 R. P. M. using a, compounded cylinder oil containing 5% of acidless tallow.
• This oil has a viscosity of 144 at 210 F. and 2224 at 100 F. both in Saybolt seconds. While the lubricant had been considered satisfactory, there was, as usual, a very noticeable noise on starting, indicating that the cylinder was not properly lubricated until the engine was well in operation.
• This improved oil had a viscosity at 100 F.
• the oil preferably contains a substantial amount of a fatty oil.
• a steam cylinder lubricant comprising in combination a steam reduced cylinder oil having a viscosity of at least seconds Saybolt at 210 F., in combination with a minute quantity of polyisobutylene dissolved therein together with from 3% to 20% of auxiliary fatty material.
• a steam cylinder lubricant comprising in combination a steam reduced cylinder oil having a viscosity of at least 100 seconds Saybolt at 210 F., with polyisobutylenev in a quantity less than 0.25% dissolved therein together with from 3% to 20% of auxiliary fatty material.
• a steam cylinder lubricant comprising in combination a steam reduced cylinder lubricating oil with polyisobutylene having a molecular weight above 40,000 dissolved therein in an amount less than about 0.25% together with from 3% to 20% of auxiliary fatty material.
• a steam cylinder lubricant comprising in combination a steam reduced cylinder lubricating oil with polyisobutylene having a molecular weight above 40,000 dissolved therein in an amount less than about 0.25%, together with a dissolved non-acid auxiliary oil and together with from 3% to 20% of auxiliary fatty material.
• a steam cylinder lubricant comprising in combination a steam reduced cylinder lubricating oil with polyisobutylene having a molecular weight above 40,000 dissolved therein in an amount less than about 0.25% and an acidless fixed oil in a proportion between 3% and 20%.

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)
• Lubricants (AREA)

Priority Applications (2)

Applications Claiming Priority (1)

Publications (1)

Family

ID=23159634

Family Applications (1)

Country Status (2)

Cited By (3)

• 1939
  • 1939-10-21 US US300565A patent/US2298855A/en not_active Expired - Lifetime
• 1940
  • 1940-10-21 FR FR876221D patent/FR876221A/fr not_active Expired

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