WO2000023542A1 - Composition d'additif dispersant pour gaz de petrole liquifie d'automobile (gpl) - Google Patents

Composition d'additif dispersant pour gaz de petrole liquifie d'automobile (gpl) Download PDF

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Publication number
WO2000023542A1
WO2000023542A1 PCT/AU1999/000887 AU9900887W WO0023542A1 WO 2000023542 A1 WO2000023542 A1 WO 2000023542A1 AU 9900887 W AU9900887 W AU 9900887W WO 0023542 A1 WO0023542 A1 WO 0023542A1
Authority
WO
WIPO (PCT)
Prior art keywords
composition according
volume
detergent
carrier fluid
fraction
Prior art date
Application number
PCT/AU1999/000887
Other languages
English (en)
Inventor
John Norman Bennett
Stephen John Andrews
Original Assignee
Mobil Oil Australia Pty Ltd
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
Priority claimed from AUPP6533A external-priority patent/AUPP653398A0/en
Priority claimed from AUPP6633A external-priority patent/AUPP663398A0/en
Application filed by Mobil Oil Australia Pty Ltd filed Critical Mobil Oil Australia Pty Ltd
Priority to AU11384/00A priority Critical patent/AU1138400A/en
Publication of WO2000023542A1 publication Critical patent/WO2000023542A1/fr

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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, 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
    • C10L3/12—Liquefied petroleum gas

Definitions

  • This invention relates to detergent additive package compositions to be added to liquefied petroleum gas (“LPG").
  • LPG is used as an alternative fuel to petrol and diesel for internal combustion engines, such as in particular in the modern motor vehicle.
  • the vast majority of automotive vehicles are powered by petrol.
  • LPG is a gas under atmospheric conditions and in storage, such as in the tank of a motor car, is maintained under pressure in liquid form. In use in motor vehicles it is flash-vaporised to a gas by an LPG converter. The resultant gas is then mixed with air by the vehicle's carburettor and then combusted in the engine in the normal way.
  • the LPG fuel is presented wholly as a gas rather than as a mixture of gas and liquid droplets.
  • LPG inevitably has a certain level of impurities. These have the capacity to form gum like residues in those parts of the engine which come into contact with the fuel; in particular the LPG converter. Such gum residues can accumulate over time and lead to various performance problems, including loss of fuel efficiency, difficulties with ignition i.e. at start-up, and increases in maintenance and running costs. In addition compliance with emission requirements may be reduced.
  • a major potential source of gum forming residues in LPG is in its source raw material and previous efforts have concentrated in-part on reducing the amount of residues from that raw material; this applies equally to refinery or naturally produced product.
  • traces of impurities remain from the raw product.
  • impurities and contaminants are encountered throughout the distribution chain where leaching of soluble organic compounds from a variety of sources, such as hoses used on tank trucks and distribution pumps, compressor oils and the like, also contribute to the accumulation of these potential gum forming materials.
  • the present inventors Rather than attempt to further purify the LPG fuel itself, or further modify the distribution chain infrastructure both of which have shown in the past to be of only limited solution, the present inventors have approached the problem of residue deposit by developing an additive system which limits the ability of the potentially gum forming residues to adhere to the LPG converter and other engine fuel system surfaces, and consequently assists in keeping the engine's fuel system clean; in particular the LPG converter.
  • the invention provides an automotive LPG detergent additive composition comprising a base carrier fluid and a detergent.
  • the detergent additive composition of the invention is such that when added to LPG fuel, it is atomised into a fine liquid particle spray, which continually flushes the LPG converter and the other components of the engines fuel system, thereby reducing the formulation of gummy residues in the engines fuel system. Any heavy gum deposits that remain in the LPG converter are solubilised by the detergent additive package and can be drained from the converter via a drain plug.
  • Base Carrier Fluid
  • the base carrier fluid provides a base for the carriage of the detergent through the fuel system and flushing deposits from the converter.
  • the complete additive composition has an appropriate distillation range.
  • the distillation range is determined primarily by the base carrier fluid.
  • the detergent component of the complete additive composition must be in liquid form, to be able to dissolve any residues that have formed and to prevent the formulation of new residues. However, unless the liquid component is in fine droplet form, it will not be transported thoroughly throughout the fuel system.
  • distillation (or boiling point) range is therefore required to be such that in use the additive composition exists substantially as a fine atomised liquid particle form.
  • the distillation range of the base carrier fluid is between approximately 130° and 200° C.
  • the base carrier fluid can be any fluid which has an appropriate distillation range and which is otherwise compatible with the LPG system.
  • a suitable base carrier fluid is "low aromatic white spirit". This will usually make up from about 35% to about 99% of the final composition.
  • Low aromatic white spirit is a C8 to C12 hydrocarbon fraction. As the person skilled will appreciate the carbon numbers and mix will determine the distillation range. Whilst it is important that a significant fraction of the base carrier fluid has a distillation range of between about 130° to 200°C other fractions can be included to extend the boiling point range as required.
  • a heavier fraction such as light heating oil (carbon fractions from about C10 to C17) may be added. This increases the final boiling point to about 250°C.
  • a small amount of such a heavier fraction has the benefit of improving the lubricity of the composition, which aids lubrication of moving engine parts, in the LPG converter and fuel intake system, exposed to the composition such as converter valves and spindles for example. It also assists in wetting the surfaces onto which residues may otherwise form and aids the removal of those residues.
  • the amount of such heavier fractions will usually be up to about only 20% by volume.
  • the proportions of the fractions can be varied as required to suit different vehicles.
  • the additive composition includes a detergent.
  • Any detergent compatible with the base carrier fraction is suitable. These include polyalkylene amines, succinimides and Mannich bases, and polyether amines, usually in a polyether carrier fluid, or other gasoline detergent.
  • the amount of detergent will normally be up to about 3% by volume and preferably in the order of about 0.5%.
  • lubricity improvers such as those listed in MIL-I-25017/QPL-25017- 17
  • metal deactivators such as N,N-disalicylidene-1 ,2-propane diamine or N,N- disalicylidene-1 ,2-cyclohexan diamine
  • antioxidants such as blends of phenylenediamine and hindered phenols
  • anti-icing additives such as diethylene glycol mono ethyl ether
  • demulsifiers such as those based on ethoxylated alkylamines.
  • the detergent additive composition will normally be added to the LPG at the time of manufacturing of the LPG although it could be added at a later stage subject to appropriate vehicle fuelling adapter systems being used.
  • the amount of additive composition used will normally be in a range of about 1 :100 to 1:10,000, although preferably about 1 :500 to 1 :1 ,000. More or less additive may be used as appropriate. A ratio of 1 :1 ,000 is particularly preferred.
  • a preferred detergent additive composition includes a base carrier fluid including;
  • a further preferred detergent additive composition includes;
  • a further preferred composition has approximately 90% low aromatic white spirit and approximately 10% light heating oil together with low amounts of detergent and other additives such as blend 13, whose composition is given in table 1.
  • the additive compositions of the invention in use provide a means by which the amount of residues otherwise deposited in an LPG powered engine can be substantially reduced.
  • the composition when included with the LPG fuel solubilises long term heavy converter deposits that may be present in the converter or other parts of the engine fuel system prior to the use of the additive containing LPG fuel or those that may accumulate.
  • the solubilised residues will remain in solution in the heavier fractions of the composition which collect at the base of the LPG converter and which can be removed as required from time to time from the engine via the converter drain plug.
  • UOP Refining Chemicals are supplied by the UOP Chemical Des Plaines, Illinois, United States of America.
  • Ethyl Hitec additive is manufactured by Ethyl Corporation.
  • Hitec 4741 may be used as an alternative to UOP 3452. TABLE 2 PART A Physical Properties of Auto LP-Gas Additive Blends

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)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Abstract

L'invention porte sur un additif dispersant pour gaz de pétrole liquifié d'automobile (GPL), qui comprend un fluide transporteur de base et un détergent. De manière générale, le fluide transporteur de base comprend entre environ 35 et 99 % d'une fraction présentant un intervalle de distillation compris entre environ 130 et 200 °C.
PCT/AU1999/000887 1998-10-16 1999-10-15 Composition d'additif dispersant pour gaz de petrole liquifie d'automobile (gpl) WO2000023542A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU11384/00A AU1138400A (en) 1998-10-16 1999-10-15 Automotive liquefied petroleum gas (lpg) detergent additive composition

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AUPP6533A AUPP653398A0 (en) 1998-10-16 1998-10-16 Automotive liquefied petroleum gas (lpg) detergent additive composition
AUPP6533 1998-10-16
AUPP6633A AUPP663398A0 (en) 1998-10-21 1998-10-21 Automotive liquefied petroleum gas (lpg) detergent additive composition
AUPP6633 1998-10-21

Publications (1)

Publication Number Publication Date
WO2000023542A1 true WO2000023542A1 (fr) 2000-04-27

Family

ID=25645899

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1999/000887 WO2000023542A1 (fr) 1998-10-16 1999-10-15 Composition d'additif dispersant pour gaz de petrole liquifie d'automobile (gpl)

Country Status (1)

Country Link
WO (1) WO2000023542A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7806946B2 (en) 2004-10-19 2010-10-05 Lloyd Lack Additives for hydrocarbon fuels
CN104449903A (zh) * 2014-11-13 2015-03-25 山东华亚环保科技有限公司 一种生物柴油复合添加剂及制备方法
CN109373336A (zh) * 2018-10-11 2019-02-22 浙江佑驰能源科技有限公司 天然气联合燃料尾气清洁融合剂高压共轨预混燃烧装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3879176A (en) * 1970-12-11 1975-04-22 Nippon Oil Co Ltd Liquefied petroleum gas compositions
US5312459A (en) * 1989-07-25 1994-05-17 Sprugel Friedrich A Additive for liquefied-gas fuels
US5782936A (en) * 1997-04-23 1998-07-21 Suburban Propane, L.P. Additive compositions for LPG fuel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3879176A (en) * 1970-12-11 1975-04-22 Nippon Oil Co Ltd Liquefied petroleum gas compositions
US5312459A (en) * 1989-07-25 1994-05-17 Sprugel Friedrich A Additive for liquefied-gas fuels
US5782936A (en) * 1997-04-23 1998-07-21 Suburban Propane, L.P. Additive compositions for LPG fuel

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7806946B2 (en) 2004-10-19 2010-10-05 Lloyd Lack Additives for hydrocarbon fuels
CN104449903A (zh) * 2014-11-13 2015-03-25 山东华亚环保科技有限公司 一种生物柴油复合添加剂及制备方法
CN104449903B (zh) * 2014-11-13 2016-09-07 谷翠英 一种生物柴油复合添加剂及制备方法
CN109373336A (zh) * 2018-10-11 2019-02-22 浙江佑驰能源科技有限公司 天然气联合燃料尾气清洁融合剂高压共轨预混燃烧装置
CN109373336B (zh) * 2018-10-11 2019-11-29 浙江佑驰能源科技有限公司 天然气联合燃料尾气清洁融合剂高压共轨预混燃烧装置

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