EP2516596A2 - Emulsification of hydrocarbon gas oils to increase efficacy of water based hydrogen sulfide scavengers - Google Patents

Emulsification of hydrocarbon gas oils to increase efficacy of water based hydrogen sulfide scavengers

Info

Publication number
EP2516596A2
EP2516596A2 EP10770692A EP10770692A EP2516596A2 EP 2516596 A2 EP2516596 A2 EP 2516596A2 EP 10770692 A EP10770692 A EP 10770692A EP 10770692 A EP10770692 A EP 10770692A EP 2516596 A2 EP2516596 A2 EP 2516596A2
Authority
EP
European Patent Office
Prior art keywords
heavy oil
scavenger
aqueous
hydrogen sulfide
processing equipment
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Withdrawn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
EP10770692A
Other languages
German (de)
French (fr)
Inventor
Larry John Karas
Craig Anderson
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of EP2516596A2 publication Critical patent/EP2516596A2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • C10G29/00—Refining of hydrocarbon oils, in the absence of hydrogen, with other chemicals
    • C10G29/20—Organic compounds not containing metal atoms
    • C10G29/22—Organic compounds not containing metal atoms containing oxygen as the only hetero atom
    • C10G29/24—Aldehydes or ketones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • 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
    • C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
    • C10G2300/20—Characteristics of the feedstock or the products
    • C10G2300/201—Impurities
    • C10G2300/207—Acid gases, e.g. H2S, COS, SO2, HCN
    • 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
    • C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
    • C10G2300/40—Characteristics of the process deviating from typical ways of processing
    • C10G2300/4075—Limiting deterioration of equipment

Definitions

  • This invention relates generally to processing heavy oil, and more particularly, to methods for removing hydrogen sulfide in heavy oil with an aqueous- based scavenger/oil emulsion.
  • H 2 S hydrogen sulphide
  • Hydrogen sulfide scavengers can be used to remove hydrogen sulfide from heavy oil. It is known to be possible to reduce the hydrogen sulphide content present in aqueous mediums by using aqueous solutions of aldehydes such as formaldehyde, glyoxal, and glutaraldehyde (see for example the U.S. Pat. Nos. 4,680, 127 and 5,284,635). However, simple addition of water-based hydrogen sulfide scavengers to heavy oil provides poor results.
  • aldehydes such as formaldehyde, glyoxal, and glutaraldehyde
  • water-based scavengers such as glyoxal will eventually settle out of the heavy oil into an acidic aqueous phase and settle to the bottom of processing equipment.
  • This aqueous phase may run along the bottom of the processing or refinery equipment as small tributaries in pipelines or stagnate at the bottom of holding tanks.
  • This acidic aqueous phase is highly corrosive and can cause troughing in the processing or refinery equipment.
  • the invention is directed to a method for reducing the amount of hydrogen sulfide present in heavy oil and reducing the amount of corrosion in processing equipment contacting the heavy oil.
  • the method includes the steps of adding an aqueous-based scavenger containing one or more aldehydes to the heavy oil using a static mixer injection system and creating an aqueous-based scavenger/heavy oil emulsion using a high shear/high velocity pump.
  • the method further includes diverting a portion of the heavy oil into a scavenger addition branch, adding the aqueous-based scavenger to the portion of the heavy oil and forming the emulsion in the addition branch, and adding the aqueous-based scavenger/oil emulsion to the heavy oi l in the processing equipment.
  • the aqueous-based scavenger is glyoxal.
  • FIG. 1 is a schematic diagram of an aqueous-based scavenger addition system for use with hydrocarbon media processing equipment.
  • a hydrogen sulfide scavenger addition system 10 is fluidically connected to processing equipment 12 for hydrocarbon media.
  • the scavenger system 10 reduces the amount of hydrogen sulfide present in the hydrocarbon media, such as heavy oils, by adding an aqueous-based scavenger in a manner so as to desirably avoid causing significant corrosion to processing equipment 1 2.
  • Aqueous- based scavengers are useful for the elimination of hydrogen sulphide present in various fluids and notably are particularly effective at eliminating the hydrogen sulphide present in heavy oi ls which can ex ist in the form of water in oi l or oil in water emulsions.
  • the processing equipment 12 in contact with the heavy oi l may be any type of equipment that can be used for processing the hydrocarbon media, such as pipelines and holding tanks. Processing equipment 1 2 subject to corrosion is general ly processing equipment made of carbon steel, but any type of processing equipment may be protected.
  • the heavy oi l may be any type of heavy oi l containing hydrogen sulfide.
  • the heavy oil includes, but is not limited to, gas oi l, naphtha, FCC slurry, diesel fuel, fuel oi l, jet fuel, gasoline, kerosene or vacuum residua.
  • the heavy oil may be at an elevated temperature to aid in transport in the processing equipment 1 2. For example, the heavy oil may be at a temperature of from about ambient to about 1 50 °C. Typically, the temperatures required to move the heavy oil in the processing equipment 12 is about 80 °C.
  • a portion of the heavy oil flowing through the processing equipment 12 is diverted from the processing equipment 12 into the scavenger addition system 10 via a scavenger addition branch 14.
  • a static mixer 1 6 is used to initially mix the scavenger with the portion of heavy oil flowing through the system 10.
  • the static mixer 16 comprises an injection quill dispersion system 18.
  • the scavenger is added to the diverted heavy oil flow in a continuous manner with the injection quill 1 8 located generally at the center of the addition branch 14 in the direction of the heavy oil flow.
  • the injection quill 18 desirably has an open-ended tube (not shown) cut at about a 45° angle with a slot.
  • the scavenger injection rate is controlled with an injection pump 20 or shut-off valve 22 in addition line 24.
  • a suitable injection quill 1 8 is available from Metal Samples Corrosion Monitoring Systems of Munford, AL.
  • the scavenger may be injected into the heavy oil by any conventional inline injection system and may be injected at any point in-line suitable to allow the scavenger to mix with the heavy oil.
  • an aqueous-based scavenger/oil micro-emulsion is formed using a high shear/high velocity mixer or pump 30.
  • a high shear/high velocity mixer or pump 30 such as one available from Silverson Machines, Inc. of East Longmeadow, MA.
  • the diverted portion of the heavy oil flow in the scavenger addition system 10, now containing the micro-emulsion, is then returned to the heavy oil flow in the processing equipment 12.
  • the scavenger may be added to the heavy oil flowing through the processing equipment without diverting a portion of the flow such that the entire heavy oil flow flows through the scavenger addition system 10.
  • the scavenger is a dispersed aqueous phase containing about 20 to 70% of one or more aldehydes chosen from the group constituted by formaldehyde, glyoxal, glutaraldehyde, glycolaldehyde or glyoxylic acid.
  • the water-based scavenger added to the heavy oil to reduce the hydrogen sulfide is Glyoxal.
  • Glyoxal is a water-soluble aldehyde and may include oligomers of glyoxal.
  • Glyoxal is commercially available as a 40 weight percent aqueous solution.
  • the scavenger may also contain an enhancing additive to catalyze the reaction of actives with the hydrogen sulfide.
  • the enhancing catalyst is a quaternary ammonium salt.
  • the quaternary ammonium salt desirably is added in an amount of about 2.5 wt %.
  • the glyoxal is added to the heavy oil in an amount sufficient to reduce the levels of hydrogen sulfide in the heavy oil.
  • glyoxal may be added in an amount of from about I ppm to about 2000 ppm, and desirably between about I ppm and about 500 ppm by volume, based on the velocity of the heavy oil through the processing equipment and the concentration of hydrogen sulfide.
  • glyoxal may be added in an amount of from about 10 ppm to about 200 ppm by volume. Any amount of hydrogen sulfide in the heavy oil may be reduced and the actual amount of residual hydrogen sulfide will vary depending on the starting amount.
  • the hydrogen sulfide levels are reduced to 1 50 ppm by volume or less, as measured in the vapor phase, based on the volume of the heavy oil. In another embodiment, the hydrogen sulfide levels are reduced to 100 ppm by volume or less, as measured in the vapor phase, based on the volume of the heavy oil. In another embodiment, the hydrogen sulfide levels are reduced to 50 ppm by volume or less, as measured in the vapor phase, based on the volume of the heavy oil. In another embodiment, the hydrogen sulfide levels are reduced to 20 ppm by volume or less, as measured in the vapor phase, based on the volume of the heavy oil.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Abstract

A hydrogen sulfide scavenging process for heavy oil that reduces hydrogen sulfide while minimizing corrosion to processing equipment. The method includes the steps of adding an aqueous-based scavenger containing one or more aldehydes, such as giyoxal, Io the heavy oil using a static mixer injection system and creating an aqueous-based scavenger/heavy oil emulsion using a high shear/high velocity pump. The aqueous- based scavenger may be added in a scavenger addition branch, with the emulsion being formed in the addition branch and then returned to the processing equipment.

Description

EMULSIFICATION OF HYDROCARBON GAS OILS TO INCREASE EFFICACY OF WATER BASED HYDROGEN SULFIDE SCAVENGERS
BACKGROUND OF THE INVENTION
Field of the Invention
|0001 1 This invention relates generally to processing heavy oil, and more particularly, to methods for removing hydrogen sulfide in heavy oil with an aqueous- based scavenger/oil emulsion.
Description of Related Art
[0002] Fossil products, and notably heavy oil, often contain significant quantities of hydrogen sulphide, H2S, which is a toxic, highly corrosive, inflammable and explosive gas. The risk of exposure to hydrogen sulfide from handling heavy oil is a health and safety concern during storage, transportation (shipping, truck or pipeline) and processing.
[00031 Hydrogen sulfide scavengers can be used to remove hydrogen sulfide from heavy oil. It is known to be possible to reduce the hydrogen sulphide content present in aqueous mediums by using aqueous solutions of aldehydes such as formaldehyde, glyoxal, and glutaraldehyde (see for example the U.S. Pat. Nos. 4,680, 127 and 5,284,635). However, simple addition of water-based hydrogen sulfide scavengers to heavy oil provides poor results. Additionally, when dispersed in a heavy oil, water-based scavengers such as glyoxal will eventually settle out of the heavy oil into an acidic aqueous phase and settle to the bottom of processing equipment. This aqueous phase may run along the bottom of the processing or refinery equipment as small tributaries in pipelines or stagnate at the bottom of holding tanks. This acidic aqueous phase is highly corrosive and can cause troughing in the processing or refinery equipment.
[0004| What is needed is an improved method for removing hydrogen sulfide from hydrocarbon media without causing corrosion to processing equipment.
I SUMMARY OF THE INVENTION
(0005) In one aspect, the invention is directed to a method for reducing the amount of hydrogen sulfide present in heavy oil and reducing the amount of corrosion in processing equipment contacting the heavy oil. The method includes the steps of adding an aqueous-based scavenger containing one or more aldehydes to the heavy oil using a static mixer injection system and creating an aqueous-based scavenger/heavy oil emulsion using a high shear/high velocity pump. In one embodiment, the method further includes diverting a portion of the heavy oil into a scavenger addition branch, adding the aqueous-based scavenger to the portion of the heavy oil and forming the emulsion in the addition branch, and adding the aqueous-based scavenger/oil emulsion to the heavy oi l in the processing equipment. In one desirable embodiment, the aqueous-based scavenger is glyoxal. The various embodiments provide an improved hydrogen sulfide scavenging process for heavy oil that reduces hydrogen sulfide while minimizing corrosion to processing equipment.
[0006] The present invention and its advantages over the prior art will become apparent upon reading the following detailed description and the appended claims with reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[00071 The above mentioned and other features of this invention will become more apparent and the invention itself will be better understood by reference to the following description of embodiments of the invention taken in conjunction with the accompanying drawings, wherein:
[0008] FIG. 1 is a schematic diagram of an aqueous-based scavenger addition system for use with hydrocarbon media processing equipment.
DETAILED DESCRIPTION OF THE INVENTION
|0009] The invention will now be described in the following detailed description with reference to the drawings, wherein preferred embodiments are described in detail to enable practice of the invention. Although the invention is described with reference to these specific preferred embodiments, it will be understood that the invention is not l imited to these preferred embodiments. But to the contrary, the invention includes numerous alternatives, modifications and equivalents as will become apparent from consideration of the following detailed description.
|0010| The singular forms "a," "an" and "the" include plural referents unless the context clearly dictates otherwise. The endpoints of all ranges reciting the same characteristic are independently combinable and inclusive of the recited endpoint. All references are incorporated herein by reference.
|001 1 ] The modifier "about" used in connection with a quantity is inclusive of the stated value and has the meaning dictated by the context (e.g., includes the tolerance ranges associated with measurement of the particular quantity).
[00121 "Optional" or "optionally" means that the subsequently described event or circumstance may or may not occur, or that the subsequently identified material may or may not be present, and that the description includes instances where the event or circumstance occurs or where the material is present, and instances where the event or circumstance does not occur or the material is not present.
|0013] Turning now to Figure 1 , a hydrogen sulfide scavenger addition system 10 is fluidically connected to processing equipment 12 for hydrocarbon media. The scavenger system 10 reduces the amount of hydrogen sulfide present in the hydrocarbon media, such as heavy oils, by adding an aqueous-based scavenger in a manner so as to desirably avoid causing significant corrosion to processing equipment 1 2. Aqueous- based scavengers are useful for the elimination of hydrogen sulphide present in various fluids and notably are particularly effective at eliminating the hydrogen sulphide present in heavy oi ls which can ex ist in the form of water in oi l or oil in water emulsions. The processing equipment 12 in contact with the heavy oi l may be any type of equipment that can be used for processing the hydrocarbon media, such as pipelines and holding tanks. Processing equipment 1 2 subject to corrosion is general ly processing equipment made of carbon steel, but any type of processing equipment may be protected. The heavy oi l may be any type of heavy oi l containing hydrogen sulfide. In one embodiment, the heavy oil includes, but is not limited to, gas oi l, naphtha, FCC slurry, diesel fuel, fuel oi l, jet fuel, gasoline, kerosene or vacuum residua. In one embodiment, the heavy oil may be at an elevated temperature to aid in transport in the processing equipment 1 2. For example, the heavy oil may be at a temperature of from about ambient to about 1 50 °C. Typically, the temperatures required to move the heavy oil in the processing equipment 12 is about 80 °C.
|0014| In the illustrated embodiment, a portion of the heavy oil flowing through the processing equipment 12 is diverted from the processing equipment 12 into the scavenger addition system 10 via a scavenger addition branch 14. A static mixer 1 6 is used to initially mix the scavenger with the portion of heavy oil flowing through the system 10. In one embodiment, the static mixer 16 comprises an injection quill dispersion system 18. The scavenger is added to the diverted heavy oil flow in a continuous manner with the injection quill 1 8 located generally at the center of the addition branch 14 in the direction of the heavy oil flow. The injection quill 18 desirably has an open-ended tube (not shown) cut at about a 45° angle with a slot. It utilizes the turbulence created to achieve distribution of the injected scavenger into the heavy oil flow in the addition branch 14. The scavenger injection rate is controlled with an injection pump 20 or shut-off valve 22 in addition line 24. A suitable injection quill 1 8 is available from Metal Samples Corrosion Monitoring Systems of Munford, AL. Alternately, the scavenger may be injected into the heavy oil by any conventional inline injection system and may be injected at any point in-line suitable to allow the scavenger to mix with the heavy oil.
[0015] After addition of the scavenger to the heavy oil, an aqueous-based scavenger/oil micro-emulsion is formed using a high shear/high velocity mixer or pump 30. In one embodiment, an inline high shear pump 30 such as one available from Silverson Machines, Inc. of East Longmeadow, MA. The diverted portion of the heavy oil flow in the scavenger addition system 10, now containing the micro-emulsion, is then returned to the heavy oil flow in the processing equipment 12. Alternately, the scavenger may be added to the heavy oil flowing through the processing equipment without diverting a portion of the flow such that the entire heavy oil flow flows through the scavenger addition system 10.
|0016| According to the invention, the scavenger is a dispersed aqueous phase containing about 20 to 70% of one or more aldehydes chosen from the group constituted by formaldehyde, glyoxal, glutaraldehyde, glycolaldehyde or glyoxylic acid. In one desirable embodiment, the water-based scavenger added to the heavy oil to reduce the hydrogen sulfide is Glyoxal. Glyoxal is a water-soluble aldehyde and may include oligomers of glyoxal. Glyoxal is commercially available as a 40 weight percent aqueous solution. The scavenger may also contain an enhancing additive to catalyze the reaction of actives with the hydrogen sulfide. In one embodiment, the enhancing catalyst is a quaternary ammonium salt. The quaternary ammonium salt desirably is added in an amount of about 2.5 wt %.
[0017] The glyoxal is added to the heavy oil in an amount sufficient to reduce the levels of hydrogen sulfide in the heavy oil. In one embodiment, glyoxal may be added in an amount of from about I ppm to about 2000 ppm, and desirably between about I ppm and about 500 ppm by volume, based on the velocity of the heavy oil through the processing equipment and the concentration of hydrogen sulfide. In another embodiment, glyoxal may be added in an amount of from about 10 ppm to about 200 ppm by volume. Any amount of hydrogen sulfide in the heavy oil may be reduced and the actual amount of residual hydrogen sulfide will vary depending on the starting amount. In one embodiment, the hydrogen sulfide levels are reduced to 1 50 ppm by volume or less, as measured in the vapor phase, based on the volume of the heavy oil. In another embodiment, the hydrogen sulfide levels are reduced to 100 ppm by volume or less, as measured in the vapor phase, based on the volume of the heavy oil. In another embodiment, the hydrogen sulfide levels are reduced to 50 ppm by volume or less, as measured in the vapor phase, based on the volume of the heavy oil. In another embodiment, the hydrogen sulfide levels are reduced to 20 ppm by volume or less, as measured in the vapor phase, based on the volume of the heavy oil. It is believed that emulsification of the water-based scavenger in the hydrocarbon media greatly increases the surface area of the aqueous phase. This increased surface area in combination with the temperature required to move the hydrocarbon media in the pipeline allows for efficient transfer of actives into the hydrocarbon phase. This effective application of the scavenger reduces the amount of chemical that is needed to be added to the hydrocarbon media. Additionally, aided by turbulent flow in the pipeline, the water-based scavenger/oil micro-emulsion takes several hours to separate. Typically, this allows sufficient time for the heavy oil to flow through the processing equipment 1 2 and into a suitable storage facility, thus, reducing any corrosion effects on the processing equipment 12.
[0018] While the disclosure has been illustrated and described in typical embodiments, it is not intended to be limited to the details shown, since various modifications and substitutions can be made without departing in any way from the spirit of the present disclosure. As such, further modifications and equivalents of the disclosure herein disclosed may occur to persons skilled in the art using no more than routine experimentation, and all such modifications and equivalents are believed to be within the scope of the disclosure as defined by the following claims.

Claims

What is claimed is: CLAIMS
1 . A method for removal of hydrogen sulphide present in heavy oi l in hydrocarbon media processing equipment, the method comprising the steps of:
adding an aqueous-based scavenger containing one or more aldehydes to the heavy oil using a static mixer injection system; and
creating an aqueous-based scavenger/heavy oi l emulsion using a high shear/high velocity pump.
2. The method of claim 1 further comprising diverting a portion of the heavy oil into a scavenger addition branch, adding said aqueous-based scavenger to the portion of the heavy oil and forming the emulsion in the addition branch, and adding the aqueous-based scavenger/oil emulsion to the heavy oil in the processing equipment.
3. The method of claim 1 wherein the static mixer uses a dispersion quill.
4. The method of claim I wherein the aqueous-based scavenger is glyoxal .
5. The method of claim 1 wherein the processing equipment comprises a pipeline.
EP10770692A 2009-12-23 2010-10-21 Emulsification of hydrocarbon gas oils to increase efficacy of water based hydrogen sulfide scavengers Withdrawn EP2516596A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/646,432 US20110147272A1 (en) 2009-12-23 2009-12-23 Emulsification of hydrocarbon gas oils to increase efficacy of water based hydrogen sulfide scavengers
PCT/US2010/053457 WO2011087540A2 (en) 2009-12-23 2010-10-21 Emulsification of hydrocarbon gas oils to increase efficacy of water based hydrogen sulfide scavengers

Publications (1)

Publication Number Publication Date
EP2516596A2 true EP2516596A2 (en) 2012-10-31

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EP10770692A Withdrawn EP2516596A2 (en) 2009-12-23 2010-10-21 Emulsification of hydrocarbon gas oils to increase efficacy of water based hydrogen sulfide scavengers

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US (1) US20110147272A1 (en)
EP (1) EP2516596A2 (en)
JP (1) JP2013515818A (en)
KR (1) KR20120123348A (en)
CN (1) CN102762696A (en)
AR (1) AR079659A1 (en)
AU (1) AU2010341783A1 (en)
BR (1) BR112012015563A2 (en)
CA (1) CA2785532A1 (en)
CL (1) CL2012001711A1 (en)
MX (1) MX2012007493A (en)
RU (1) RU2012127278A (en)
SG (1) SG181925A1 (en)
TW (1) TW201137108A (en)
WO (1) WO2011087540A2 (en)

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MX2012007493A (en) 2012-08-03
KR20120123348A (en) 2012-11-08
SG181925A1 (en) 2012-07-30
CA2785532A1 (en) 2011-07-21
AR079659A1 (en) 2012-02-08
US20110147272A1 (en) 2011-06-23
TW201137108A (en) 2011-11-01
CL2012001711A1 (en) 2013-04-12
CN102762696A (en) 2012-10-31
WO2011087540A2 (en) 2011-07-21
AU2010341783A1 (en) 2012-07-19
WO2011087540A3 (en) 2011-11-17
BR112012015563A2 (en) 2017-09-05
RU2012127278A (en) 2014-01-27
JP2013515818A (en) 2013-05-09

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