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
  • C10G33/00—Dewatering or demulsification of hydrocarbon oils
  • C10G33/04—Dewatering or demulsification of hydrocarbon oils with chemical means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
  • B01D17/02—Separation of non-miscible liquids
  • B01D17/04—Breaking emulsions
  • B01D17/047—Breaking emulsions with separation aids
• • 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
  • C10G31/00—Refining of hydrocarbon oils, in the absence of hydrogen, by methods not otherwise provided for
  • C10G31/08—Refining of hydrocarbon oils, in the absence of hydrogen, by methods not otherwise provided for by treating with water
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2256/00—Main component in the product gas stream after treatment
  • B01D2256/24—Hydrocarbons
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2257/00—Components to be removed
  • B01D2257/80—Water

Definitions

• Additive composition for demulsification of water-in-oil emulsion, and method of use thereof, and method of demulsification are added to water-in-oil emulsion, and method of use thereof, and method of demulsification.
• the present invention relates to additive composition for demulsification of water-in-oil emulsion.
• the present invention relates to additive composition for demulsification of water-in-oil emulsion caused by mixing of wash water and crude oil.
• the present invention relates to additive composition for demulsification of water-in-oil emulsion caused by mixing of wash water and crude oil in the desalter unit of the refinery.
• the present invention relates to additive composition for demulsification of water-in-oil emulsion caused by mixing of wash water and crude oil in the desalter unit of the refinery, wherein the additive composition comprises:
• a a compound selected from the group comprising glyoxal, neutralized glyoxal and mixture thereof;
• the present invention relates to a method of demulsification of water-in-oil emulsions, particularly of water-in-oil emulsions caused by mixing of wash water and crude oil, more particularly of water-in-oil emulsions caused by mixing of wash water and crude oil in the desalter unit of the refinery.
• the present invention relates to a method of using the additive composition of the present invention for demulsification of water-in-oil emulsions, particularly of water-in-oil emulsions caused by mixing of wash water and crude oil, more particularly of water-in-oil emulsions caused by mixing of wash water and crude oil in the desalter unit of the refinery.
• the water-in-oil emulsions are formed in various industrial operations, and are responsible for substantial loss of various industrial ingredients including difficulties in separation of oil. Therefore, breaking of water-in-oil emulsions during the processing of oil is the requirement of the industry, particularly of the crude oil refinery industry wherein the wash water gets mixed with crude oil in the desalter unit of the refinery and forms water-in-oil emulsion.
• the water-in-oil emulsion caused by mixing of wash water and crude oil is broken by addition of demulsifier to the wash water.
• the main problem of using the demulsifiers is that these are to be used in higher amounts and required continuously through the processing of crude oil, which results in substantial increase in cost of processing of crude oil.
• demulsifiers are expensive, which also results in substantial increase in cost of processing of crude oil.
• demulsifiers are condensation product of nonyl phenols, and presently, there is a need to reduce consumption of nonyl phenols in view of their cost and environmental adverse effects.
• the present invention aims at providing a solution to above-described existing industrial problems by providing:
• Hi method for demulsification of water-in-oil emulsions by employing the additive composition.
• the main object of the present invention is to provide:
• an additive composition for demulsification of water-in-oil emulsions particularly of water-in-oil emulsions caused by mixing of wash water and crude oil, more particularly of water-in-oil emulsions caused by mixing of wash water and crude oil in the desalter unit of the refinery.
• the other object of the present invention is to provide:
• a method of demulsification of water-in-oil emulsions by employing an additive composition of the present invention particularly of water-in-oil emulsions caused by mixing of wash water and crude oil, more particularly of water-in-oil emulsions caused by mixing of wash water and crude oil in the desalter unit of the refinery.
• Another object of the present invention is to provide:
• Hi a method of using the additive composition of the present invention for demulsification of water-in-oil emulsions, particularly of water-in-oil emulsions caused by mixing of wash water and crude oil, more particularly of water-in-oil emulsions caused by mixing of wash water and crude oil in the desalter unit of the refinery.
• an object of the present invention is to provide an additive composition for demulsification of water-in-oil emulsions, which is preferably caused by mixing of wash water and crude oil, more preferably for demulsification of the water-in-oil emulsions caused by mixing of wash water and crude oil in the desalter unit of the refinery so as to reduce the amount of the presently used demulsifiers, which are condensation product of nonyl phenols, and hence, to reduce consumption of nonyl phenols, and thereby to reduce cost of processing and associated environmental adverse effects.
• the inventor has found that when a compound selected from the group comprising glyoxal, neutralized glyoxal, glyoxal derivative and a mixture thereof is added to one or more demulsifiers, the said compound, surprisingly and unexpectedly, results in substantial improvement of demulsification efficiency of the demulsifier, and thereby, results in substantial reduction of requirement of amount of the demulsifier, which results in substantial decrease in cost of processing of crude oil, and associated environmental adverse effects.
• glyoxal and neutralized glyoxal are less expensive than the demulsifiers, it further results in substantial decrease in cost of processing of the crude oil.
• the present invention relates to a demulsification composition for demulsification of water-in-oil emulsion caused due to wash water in the crude oil, wherein the composition comprises: a. a compound selected from the group comprising glyoxal, neutralized glyoxal, glyoxal derivative and a mixture thereof; and
• the neutralized glyoxal is glyoxal having pH neutral to basic.
• the inventor has observed that the glyoxal is very acidic, and therefore, it may cause corrosion. Accordingly, neutralizing the glyoxal till its pH is neutral to basic avoids corrosion of crude oil processing unit, and still improves demulsification efficiency of the demulsifier.
• the neutralized glyoxal is obtained by neutralizing the glyoxal with an amine or alkaline medium.
• the amine may include (or comprises) triethanol amine (TEA).
• TAA triethanol amine
• the alkaline medium may include (or comprises) sodium hydroxide aqueous solution.
• the neutralized glyoxal may also include (or comprise) neutralized derivative of glyoxal. Therefore, in the present invention, the term “neutralized glyoxal” or the term “neutralized derivative of glyoxal” have one and same meaning unless otherwise explicitly described.
• the pH neutral to basic includes a pH varying from about 7 to about 12.
• the glyoxal derivative may include (or comprise) methanol, ethanol, butanol, ethylene glycol derivatives of glyoxal, or a mixture thereof.
• the demulsifier is selected from the group comprising condensation product of:
• the demulsifier is selected from the group comprising condensation product of: i) cardanol, nonyl phenol and amyl phenol, and formaldehyde;
• the above-described condensation product is oxyalkylated.
• the demulsifier is selected from the group comprising oxyalkylated condensation product of:
• the demulsifier is selected from the group comprising oxyalkylated condensation product of:
• the above-described condensation products is oxyalkylated with ethylene oxide, propylene oxide, butylene oxide or their mixtures to result in oxyalkylated copolymers or oxyalkylated polymers thereof. Therefore, in accordance with one of the embodiments of the present invention, the demulsifier is selected from the group comprising:
• the demulsifier may be selected from a group comprising:
• copolymer means a polymer made from two different phenols and the term “polymer” means a polymer made from one phenol.
• the molecular weight of the demulsifier of the present invention may vary from about 2000 to about 20000 daltons as measured by Gel Permeation Chromatography using the tetrahydro furan (THF) as solvent.
• the composition comprises:
• the composition may comprise: a) about 0.1 ppm to about 1000 ppm of the compound selected from the group comprising glyoxal, neutralized glyoxal, glyoxal derivative and a mixture thereof; and
• the additive composition may be added to the crude oil phase or to the desalter wherein wash water is mixed with crude oil and forms a water-in-oil emulsion.
• the present invention relates to
• the present demulsification composition comprising:
• a a compound selected from the group comprising glyoxal, neutralized glyoxal, glyoxal derivative and a mixture thereof;
• the present invention relates to
• a a compound selected from the group comprising glyoxal, neutralized glyoxal, glyoxal derivative and a mixture thereof;
• the 'blank' is without any additive
• compound 'A' is demulsifier, which is base catalysed nonylphenol formaldehyde resin and used for comparison;
• compositions comprise
• compositions comprise:
• ⁇ ' a compound selected from glycolic acid, glyoxylic acid, DL-malic acid, benzaldehyde, or glutaraldehyde.
• the compound 'A' (the demulsifier) is 50% active, the glyoxal is 40% active, the neutralized glyoxal comprises 40% active glyoxal neutralized with 100% active triethanol amine (TEA); the glycolic acid, the glyoxylic acid and the DL-malic acid are 40% active.
• TEA triethanol amine
• the present additive composition and the prior art or comparative additive composition was added to the water-in-oil emulsion of water and crude oil formed after mixing of water and crude oil.
• test was carried out in portable electric desalter (PED) or electrostatic separator at 130°C, with water-in-oil emulsion comprising 5% by vol of wash water (pH of wash water was 6.6), and 95% by vol of crude oil from Western part of India.
• PED portable electric desalter
• electrostatic separator at 130°C
• the second component which is either the glyoxal or the neutralized glyoxal (as per the present invention); or the glycolic acid, the glyoxylic acid; the DL-malic acid; the benzaldehyde; or the glutaraldehyde (for the purpose of comparison).
• the present compositions are more economical and environmental friendly.

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• 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)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
• Colloid Chemistry (AREA)
• Detergent Compositions (AREA)

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Citations (4)

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• 2016
  • 2016-06-13 HR HRP20200810TT patent/HRP20200810T1/hr unknown
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