Classifications

• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
  • C11D7/22—Organic compounds
  • C11D7/32—Organic compounds containing nitrogen
  • C11D7/3209—Amines or imines with one to four nitrogen atoms; Quaternized amines
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
  • C10G9/00—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
  • C10G9/14—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils in pipes or coils with or without auxiliary means, e.g. digesters, soaking drums, expansion means
  • C10G9/16—Preventing or removing incrustation
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
  • C11D7/22—Organic compounds
  • C11D7/32—Organic compounds containing nitrogen
  • C11D7/3281—Heterocyclic compounds
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
  • C11D7/50—Solvents
  • C11D7/5004—Organic solvents
  • C11D7/5013—Organic solvents containing nitrogen
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
  • C11D7/22—Organic compounds
  • C11D7/24—Hydrocarbons
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
  • C11D7/22—Organic compounds
  • C11D7/32—Organic compounds containing nitrogen
• • 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
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S507/00—Earth boring, well treating, and oil field chemistry
  • Y10S507/927—Well cleaning fluid
  • Y10S507/929—Cleaning organic contaminant
  • Y10S507/93—Organic contaminant is asphaltic

Definitions

• the present invention relates to the removal of organic deposits from surfaces, and more particularly, but not by'way of limitation, to a method and solvent for removing organic deposits containing asphaltenic compounds from surfaces.
• Organic deposits derived from crude oil have long been a source of trouble and operating expense to petroleum producers. These organic deposits may be almost totally paraffinic in nature or they may be highly asphaltic, depending on the particular crude oil produced.
• the deposits accumulate in tubular goods, production and storage equipment, and pipelines, as well as on the faces of producing formations in oil and water wells. As the organic deposits build up in production equipment, tubular goods, and related apparatus, production is gradually decreased until remedial work is required to remove the deposits.
• removal of such organic deposits has been accomplished by mechanical scraping of the surfaces of equipment utilizing knives, scrapers, and similar devices, and also by dissolving the deposits in solvents such as hot crude oil and kerosene.
• Knox et al. discloses combining a heat generating chemical with an aqueous solution to provide the heat source, adding thereto a light paraffin solvent to become heated, and contacting the deposit to be removed with the thus heated solvent.
• the author discloses the use of a standard well stimulation solvent, diesel oil, by itself and in combination with certain additives to dissolve asphaltenes.
• a standard well stimulation solvent diesel oil
• Some of the materials utilized by J effries-Harris include diesel oil; diesel oil-% xylene; diesel oil-5% xylene-l% n-butyl amine; diesel oil-1% n-butylamine; diesel oil- 5% toluene; and diesel oilhexylamine.
• diesel oil and 1% n-butylamine appeared to be substantially superior to diesel oil alone with respect to dissolving asphaltenes, but the combinations diesel oil-5% xylene-1% n-butylamine, diesel oil-5% xylene, and diesel oil-5% toluene appeared to provide very little, if any, improvement to the solvent power of diesel oil.
• R, R, and R represent members selected from the group consisting of hydrogen, alkyl radicals having from 1 to 4 carbon atoms, alkylamine radicals having from 1 to 4 carbon atoms, cycloalkyl radicals having from 3 to 6 carbon atoms and mixtures thereof.
• the present invention is directed to a method and solvent for dissolving organic deposits containing asphaltenic compounds.
• the solvent of the present invention comprises a liquid aromatic hydrocarbon having an amine combined therewith selected from the group consisting of pyridine, morpholine and primary, secondary, and tertiary amines defined by the following general formula:
• R, R, and R" represent members selected from the group consisting of hydrogen, alkyl radicals having from 1 to 4 carbon atoms, alkylamine radicals having from I to 4 carbon atoms, cycloalkyl radicals having from 3 to 6 carbon atoms and mixtures thereof.
• the solvent of this invention which is comprised of an aromatic hydrocarbon and an amine, in particular amounts of each, unexpectedly dissolves a greater quantity of organic deposits containing asphaltenic compounds in the same interval of time than would be predicted from either the amine or the aromatic hydrocarbon acting alone.
• a preferred solvent of the present invention consists essentially of a liquid aromatic hydrocarbon and an amine of the type described above wherein the amine is present in the solvent in an amount of from about 1 to about 50 and more preferably about 1 to about 35 percent by total volume of solvent.
• aromatic hydrocarbons which are particularly useful in the present invention are benzene, toluene and xylene.
• examples of amines which are par ticularly useful in the present invention are pyridine,
• morpholine and low molecular weight primary, secondary, and tertiary amines such as n-butylamine, ethylenediamine, diethylenetriamine, dimethylaminopropylamine, diethylaminopropylamine, and cycloalkyl amines such as cyclohexylamine.
• primary, secondary, and tertiary amines such as n-butylamine, ethylenediamine, diethylenetriamine, dimethylaminopropylamine, diethylaminopropylamine, and cycloalkyl amines such as cyclohexylamine.
• a more specific preferred solvent of the present invention is comprised of an aromatic hydrocarbon selected from the group consisting of benzene, toluene and xylene and an amine selected from the group consisting of n-butylamine, ethylenediamine, diethylenetriamine, and dimethylaminopropylamine, wherein the amine is present in the solvent in an amount of from about 3 to about percent by total volume of solvent.
• a more specific preferred solvent of the present invention consists essentially of xylene and ethylenediamine wherein the ethylenediamine is present in the solvent in an amount of about 5 percent by total volume of solvent.
• the solvent of this invention can be circulated over the surface from which the deposit is to be removed or the solvent can be allowed to contact the deposit to be re moved in a static condition for a period of time sufficient for the scale to be removed.
• the contacting can proceed at normal temperatures or the solvent can be heated at the discretion of the user.
• the solvents of the present invention dissolve organic deposits containing asphaltenic compounds and once the deposit has been dissolved and the solvent removed, no further treatment is necessary.
• the colorimeter Prior to the measurement of each solution, the colorimeter is checked against reagent grade xylene to assure that the percent transmittance for reagent grade xylene alone is measured by the apparatus as being 0... hundred percent.
• test solutions of approximately 25 milliliters each are then prepared by mixing a known quantity of an amine with a known quantity of xylene. lnto each test solution, the temperature of which is about F, there is then placed a piece of asphaltic material. The asphaltic material utilized is taken from a common source, and the initial surface area of the asphaltic material added to each test solution is approximately the same.
• the asphaltic material is maintained in the test solution for a fixed period of time at the termination of which the solution is filtered to remove all undissolved material.
• a sample of filtrate from each test solution is then collected and diluted with 25 milliliters reagent grade xylene per 1 milliliter of test solution.
• the diluted test solutions are then subjected to colorimetric analysis exactly as described above.
• the percent transmittance for each test solution is recorded, and the recorded transmittance is then used with Curve A to determine the quantity of asphaltic material dissolved by the solution.
• Table B sets out the dissolution properties of n-butylamine-xylene and ethylenediamine-xylene for asphalt, wherein the contact time for n-butylaminexylene and asphalt is 10 minutes and the contact time for ethylenediamine-xylene and asphalt is 5 minutes.
• Asphaltene solubility tests in various solvents of the present invention are given in Table I below.
• the relative solvent improvement is based on solubility in pure xylene as compared with solubility in xylene combined with the amine given in the table at an amine concentration of 5 percent by volume.
• the solubility test procedure utilized is as previously described. After 5 minutes, each solvent is gently swirled and filtered. The filtrates from each sample are then analyzed by the colorimetric procedure described above to determine the solubility of the deposits therein.
• the relative solvent improvement is then the ratio of asphalt dissolved by the solvent herein to the asphalt dissolved by xylene alone.
• EXAMPLE 2 A solvent comprised of xylene and 1 percent by volume n-butylamine is prepared. The solubility therein of organic deposits containing asphaltenic compounds is determined and compared with the solubility of the same deposits in xylene alone. The xylene-amine solvent dissolves the deposits 2.06 times as well in 10 minutes as the xylene alone.
• EXAMPLE 3 A solvent comprised of xylene and n-butylamine wherein the n-butylamine is present in the amount of 10 percent by volume is prepared. The solubility of organic deposits containing asphaltenic compounds in the solvent is determined and compared with the solubility of the deposits in xylene alone. It is found that the xylene-amine solvent dissolves the deposits 10.4 times as well in 10 minutes as the xylene alone.
• EXAMPLE 4 A solvent comprised of xylene and n-butylamine is prepared wherein the n-butylamine is present in an amount of 20 percent by volume.
• the solubility of organic deposits containing asphaltenic compounds in the solvent is determined and compared with the solubility of the same deposits in xylene alone. It is found 7 that the xylene-amine solvent dissolves the deposits 30.0 times as well in 10 minutes as the xylene alone.
• EXAMPLE 6 A solvent comprised of xylene and n-butylamine is prepared wherein the n-butylamine is present in an amount of percent by volume. The solubility of organic deposits containing asphaltenic compounds in the solvent is determined and compared with the solubility of the same deposits in xylene alone. It is found that the xylene-amine solvent dissolves the deposits 16.9 times as well in minutes as the xylene alone.
• a method for removing organic deposits containing asphaltenic compounds from surfaces which comprises contacting said deposits with a solvent consisting essentially of a hydrocarbon selected from the group consisting of benzene, toluene, and xylene and an amine selected from the group consisting of pyridine, morpholine, and primary, secondary and tertiary amines represented by the formula wherein R, R, and R" are selected from the group consisting of hydrogen, alkyl radicals having from 1 to 4 carbon atoms, alkyl amine radicals having from 1 to 4 carbon atoms, cycloalkyl radicals having from 3 to 6 carbon atoms and mixtures thereof and, further, wherein said amine is present in said solution in an amount of from about 1 percent to about 50 percent by volume.
• a solvent consisting essentially of a hydrocarbon selected from the group consisting of benzene, toluene, and xylene and an amine selected from the group consisting of pyridine, morpholine, and primary
• amine is selected from the group consisting of n-butylamine, ethylenediamine, diethylenetriamine, dimethylaminopropylamine, diethylamine, and diethylaminopropylamine.
• a method of removing organic deposits containing asphaltenic compounds from within oil production equipment comprising the steps of contacing said deposits within said equipment with a solvent consisting essentially of a hydrocarbon selected from the group consisting of benzene, toluene, and xylene, and an amine selected from the group consisting of pyridine and morpholine, and primary, secondary, and tertiary amines represented by the formula wherein R, R, and R are members of the group cor;
• amine is selected from the group consisting of n-butylamine, ethylenediamine, diethylenetriamine, dimethylaminopropylamine, diethylamine, and diethylaminopropylamine.
• a solvent for asphaltenic-containing compounds consisting essentially of a hydrocarbon selected from the group consisting of benzene, toluene, and xylene, and an amine selected from the group consisting of pyridine, diethylaminopropylamine, diethylamine, n-butylamine, dimethylaminopropylamine, ethylenediamine, and diethylenetriamine, wherein said amine is present in an amount of from 1 percent to about 35 percent by volume.
• amine is selected from the group consisting of n-butylamine, ethylenediamine, diethylenetriamine, dimethylaminopropylamine, diethylamine, and diethylaminopropylamine.
• a method for removing organic deposits containing asphaltenic compounds from surfaces which comprises contacting said deposits with a solvent consisting essentially of a hydrocarbon selected from the group consisting of benzene, toluene, and xylene, and an amine represented by the general formula .amount of from about 1 percent to about 35 percent by 3,914,132 9 10 volume. mine, and n-butylamine, and further wherein said 17.
• a solvent consisting essentially of a hydrocarbon selected from the group consisting of benzene, toluene, and xylene, and an amine represented by the general formula .amount of from about 1 percent to about 35 percent by 3,914,132 9 10 volume. mine, and n-butylamine, and further wherein said 17.
• said hydrocaramine is present in an amount of from about 3 percent bon is xylene and said amine is selected from the group to about 20 percent by volume. consisting of ethylenediamine, dimethylaminopropyla- 5

Landscapes

• Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Organic Chemistry (AREA)
• Life Sciences & Earth Sciences (AREA)
• Wood Science & Technology (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• General Chemical & Material Sciences (AREA)
• Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
• Detergent Compositions (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (2)

Family

ID=26860566

Family Applications (1)

Country Status (2)

Cited By (16)

Citations (7)

• 0
  • BE BE359946D patent/BE359946A/xx unknown
• 1973
  • 1973-05-14 US US359946A patent/US3914132A/en not_active Expired - Lifetime

Patent Citations (7)

Non-Patent Citations (1)

Also Published As

Similar Documents