EP1756251A1 - Utilisation de polysulfures organiques contre la corrosion par les bruts acides - Google Patents

Utilisation de polysulfures organiques contre la corrosion par les bruts acides

Info

Publication number
EP1756251A1
EP1756251A1 EP05753703A EP05753703A EP1756251A1 EP 1756251 A1 EP1756251 A1 EP 1756251A1 EP 05753703 A EP05753703 A EP 05753703A EP 05753703 A EP05753703 A EP 05753703A EP 1756251 A1 EP1756251 A1 EP 1756251A1
Authority
EP
European Patent Office
Prior art keywords
formula
sulfur
compound
corrosion
hydrocarbon
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.)
Withdrawn
Application number
EP05753703A
Other languages
German (de)
English (en)
French (fr)
Inventor
Francis Humblot
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.)
Arkema France SA
Original Assignee
Arkema France SA
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 Arkema France SA filed Critical Arkema France SA
Publication of EP1756251A1 publication Critical patent/EP1756251A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10GCRACKING 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
    • C10G75/00Inhibiting corrosion or fouling in apparatus for treatment or conversion of hydrocarbon oils, in general
    • C10G75/02Inhibiting corrosion or fouling in apparatus for treatment or conversion of hydrocarbon oils, in general by addition of corrosion inhibitors
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10GCRACKING 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
    • C10G7/00Distillation of hydrocarbon oils
    • C10G7/02Stabilising gasoline by removing gases by fractioning
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS 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
    • C10L1/00Liquid carbonaceous fuels
    • C10L1/10Liquid carbonaceous fuels containing additives
    • C10L1/14Organic compounds
    • C10L1/24Organic compounds containing sulfur, selenium and/or tellurium

Definitions

  • the present invention relates to the field of the treatment of acidic crude oils in refineries. More specifically, it relates to a process for combating corrosion of refining units which process acid crudes, including the use of specific poly sulfide compounds. Petroleum refineries can face a serious corrosion problem when they have to process certain so-called acid crudes. These crude acids contain essentially naphthenic acids which are at the origin of this very particular corrosion phenomenon, since it occurs in a liquid medium which does not conduct electric current. These naphthenic acids correspond to saturated cyclic hydrocarbons carrying one or more carboxylic groups. The acidity of a crude oil is described by a standardized measurement according to standard ASTM D 664-01.
  • TAN Total Acid Number
  • EP 742277 describes the inhibitory action of a combination of a trialkyl phosphate and an organic polysulfide.
  • US patent 5552085 recommends the use of thiophosphorus compounds such as organo thiophosphates or thiophosphites.
  • the patent AU 693975 discloses as an inhibitor a mixture of trialkyl phosphate and phosphoric esters of sulfurized phenol neutralized with lime.
  • organophospores are very delicate to handle, due to their high toxicity. They are also poisons for the hydro-treatment catalysts installed to purify the hydrocarbon fractions from atmospheric distillations and under vacuum. For these two reasons at least, their use in the refining field is not desirable.
  • the subject of the invention is therefore a method of combating corrosion by naphthenic acids of the metal walls of a refining unit, characterized in that it comprises the addition to the hydrocarbon stream to be treated by the unit d '' an effective amount of one or more hydrocarbon compound (s) of formula:
  • - n is an integer between 2 and 15, and - the symbols R x and R 2 , identical or different, each represent an alkyl radical, linear or branched, comprising between 2 and 5 carbon atoms, these radicals possibly containing one or more heteroatoms such as oxygen or sulfur; or - R 1 and R 2 , identical or different, each represent a cycloalkyl radical comprising between 3 and 5 carbon atoms, these radicals possibly containing one or more heteroatoms such as oxygen or sulfur.
  • the polysulphides of formula (I) are prepared according to methods known per se, such as those described in patents US2708199, US3022351 and US3038013. Some are commercial products.
  • R 1 and R 2 are alkyl radicals, linear or branched, and n is between 2 and 6.
  • the radicals R and R are identical, due to improved stability for the compound of corresponding formula (I).
  • ditertiobutyl polysulphides are used as mixture of compounds of formula (I).
  • These products, of industrial origin, are for example derived from the reaction of sulfur with ter-butyl mercaptan. The reaction conditions make it possible to prepare industrial products composed of a mixture of polysulphides with a number of sulfur atoms varying between 3 and 10, and having a number average value between 2 and 6.
  • the quantity of compound (s) of formula (I) to be added to the hydrocarbon stream to be treated by the refining unit generally corresponds to a concentration, expressed in equivalent weight of sulfur of said compound relative to the weight of the hydrocarbon stream , between 1 and 5000 ppm, preferably between 5 and 500 ppm.
  • a concentration, expressed in equivalent weight of sulfur of said compound relative to the weight of the hydrocarbon stream between 1 and 5000 ppm, preferably between 5 and 500 ppm.
  • the method according to the invention advantageously makes it possible to treat hydrocarbon streams, in particular crude oils, whose TAN is greater than 0.2, and preferably greater than 1.
  • the temperature for implementing the method corresponds to that at which occur the reactions of corrosion by naphthenic acids, and is generally between 200 and 450 ° C, and more particularly between 250 and 350 ° C.
  • the addition of the compound of formula (I) in the hydrocarbon stream can be carried out very close to where the corrosion reaction takes place or else, at a lower temperature, upstream of the process of said unit. This addition can be carried out by any means known to a person skilled in the art, ensuring control of the injection rate and good dispersion of the additive in the hydrocarbon, for example by means of a nozzle or a mixer. .
  • metal walls of the refining unit means all the walls capable of being in contact with the stream of acidic hydrocarbon to be treated. It can therefore be both the internal wall proper of units such as atmospheric and vacuum distillation towers, as the surface of the internal elements thereof as their trays or linings, or even peripheral elements to these, like their withdrawal and inlet lines, pumps, preheating furnaces, or heat exchangers, as soon as these elements are brought to a local temperature of between 200 and 450 ° C.
  • a hydrocarbon stream to be treated in accordance with the process according to the invention there is petroleum crude oil, the residue from atmospheric distillation, the diesel fractions from atmospheric and vacuum distillation, as well as the distillate and vacuum from vacuum distillation.
  • This test uses an iron powder simulating a metallic surface, and a mineral oil in which a mixture of naphthenic acids is dissolved, simulating a stream of acid crude.
  • the characteristics of these reagents are as follows: - white mineral oil having a density of 0.838 - powder of spherical iron particles, with a particle size of -40 + 70 mesh (i.e. approximately 212 to 425 ⁇ m) - mixture of naphthenic acids having from 10 to 18 carbon atoms, a boiling point between 270 and 324 ° C and an average molar mass of 244 g / mol.
  • the following are introduced into a 150 ml glass reactor, equipped with a dropping funnel and a water cooler, and provided with a stirring and temperature measurement system: - 70 ml (i.e. 58.8 g) mineral oil, - 2 g of iron powder, - 2.8 g of the mixture of naphthenic acid.
  • the initial TAN of the reaction mixture is equal to 10.
  • These reagents are kept in contact for 2 hours at a temperature of 250 ° C., under a dry nitrogen atmosphere to avoid oxidation reactions.
  • the concentration of dissolved iron in the medium is determined by a conventional method implementing a mineralization of a sample, taking up the residue in acidified water and dosing by a plasma torch . This concentration of dissolved iron (expressed in ppm) is directly proportional to the rate of corrosion of the iron powder generated by the mixture of naphthenic acids present in the mineral oil.
  • Example 1 is repeated by adding different types of alkyl polysulphides to the mineral oil when the reactor is charged. The added amount of these derivatives is calculated so as to obtain a concentration of 500 ppm expressed in equivalent weight of sulfur in the mineral oil present in the reactor.
  • Table II The results obtained in Table II below are obtained.

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)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Anti-Oxidant Or Stabilizer Compositions (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
EP05753703A 2004-04-13 2005-04-08 Utilisation de polysulfures organiques contre la corrosion par les bruts acides Withdrawn EP1756251A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0403838A FR2868787B1 (fr) 2004-04-13 2004-04-13 Utilisation de polysulfures organiques contre la corrosion par les bruts acides
PCT/FR2005/000861 WO2005103208A1 (fr) 2004-04-13 2005-04-08 Utilisation de polysulfures organiques contre la corrosion par les bruts acides

Publications (1)

Publication Number Publication Date
EP1756251A1 true EP1756251A1 (fr) 2007-02-28

Family

ID=34944754

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05753703A Withdrawn EP1756251A1 (fr) 2004-04-13 2005-04-08 Utilisation de polysulfures organiques contre la corrosion par les bruts acides

Country Status (16)

Country Link
US (1) US20070163922A1 (no)
EP (1) EP1756251A1 (no)
JP (1) JP2007532745A (no)
KR (1) KR20070005676A (no)
CN (1) CN1973021A (no)
AR (1) AR050242A1 (no)
AU (1) AU2005235761B2 (no)
BR (1) BRPI0509789A (no)
CA (1) CA2562102A1 (no)
EA (1) EA010668B1 (no)
FR (1) FR2868787B1 (no)
MX (1) MXPA06011863A (no)
NO (1) NO20065183L (no)
TW (1) TWI314952B (no)
UA (1) UA84741C2 (no)
WO (1) WO2005103208A1 (no)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104152192B (zh) * 2013-05-13 2016-05-25 刘爱国 一种汽柴油防腐剂
KR101990826B1 (ko) 2019-03-18 2019-06-19 영화진흥위원회 청각장애인의 관람 환경 개선용 시각 제공장치
US20210255609A1 (en) * 2020-02-14 2021-08-19 Exxonmobil Research And Engineering Company Systems and methods for monitoring and predicting a risk state of an industrial process

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2708199A (en) * 1951-10-24 1955-05-10 Continental Oil Co Preparation of organic polysulfides
US3022351A (en) * 1957-03-07 1962-02-20 Phillips Petroleum Co Production of organic polysulfides
US3062612A (en) * 1959-04-25 1962-11-06 Inst Francais Du Petrole Method of protecting metals against electrochemical corrosion of the acidic type
US3038013A (en) * 1959-08-25 1962-06-05 Phillips Petroleum Co Color improvement in synthesis of polysulfides
DE3437936A1 (de) * 1984-10-17 1986-04-17 Peter, Siegfried, Prof.Dr., 8525 Uttenreuth Verfahren und mittel zur bekaempfung der korrosion unter reduzierenden bedingungen
US5182013A (en) * 1990-12-21 1993-01-26 Exxon Chemical Patents Inc. Naphthenic acid corrosion inhibitors
US5500107A (en) * 1994-03-15 1996-03-19 Betz Laboratories, Inc. High temperature corrosion inhibitor
US5457234A (en) * 1994-06-20 1995-10-10 Phillips Petroleum Company Process for treating organic polysulfide compounds
US5552085A (en) * 1994-08-31 1996-09-03 Nalco Chemical Company Phosphorus thioacid ester inhibitor for naphthenic acid corrosion
US5464525A (en) * 1994-12-13 1995-11-07 Betz Laboratories, Inc. High temperature corrosion inhibitor
US5630964A (en) 1995-05-10 1997-05-20 Nalco/Exxon Energy Chemicals, L.P. Use of sulfiding agents for enhancing the efficacy of phosphorus in controlling high temperature corrosion attack
DE69719186T2 (de) * 1996-05-30 2003-11-27 Baker-Hughes Inc., Houston Naphtensäurekorrosionskontrolle mit thiophosphorverbindungen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005103208A1 *

Also Published As

Publication number Publication date
BRPI0509789A (pt) 2007-10-23
AU2005235761B2 (en) 2009-12-17
TW200606246A (en) 2006-02-16
US20070163922A1 (en) 2007-07-19
FR2868787A1 (fr) 2005-10-14
WO2005103208A1 (fr) 2005-11-03
CA2562102A1 (fr) 2005-11-03
FR2868787B1 (fr) 2006-06-23
AU2005235761A1 (en) 2005-11-03
JP2007532745A (ja) 2007-11-15
TWI314952B (en) 2009-09-21
AR050242A1 (es) 2006-10-11
UA84741C2 (ru) 2008-11-25
CN1973021A (zh) 2007-05-30
NO20065183L (no) 2006-11-10
EA200601679A1 (ru) 2007-04-27
EA010668B1 (ru) 2008-10-30
KR20070005676A (ko) 2007-01-10
MXPA06011863A (es) 2007-04-16

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