CN105885927A - Method for preparing demulsifier for sour crude oil - Google Patents
Method for preparing demulsifier for sour crude oil Download PDFInfo
- Publication number
- CN105885927A CN105885927A CN201610415749.1A CN201610415749A CN105885927A CN 105885927 A CN105885927 A CN 105885927A CN 201610415749 A CN201610415749 A CN 201610415749A CN 105885927 A CN105885927 A CN 105885927A
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- CN
- China
- Prior art keywords
- demulsifier
- acid
- carboxylic acid
- preparation
- mixed solution
- Prior art date
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Classifications
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- 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
-
- 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
- C10G2300/10—Feedstock materials
- C10G2300/1033—Oil well production fluids
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- 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
The invention discloses a method for preparing a demulsifier for sour crude oil to solve the problems that existing demulsifiers can not be well applied to sour crude oil, and an ideal demulsification effect can not be realized. The method comprises the steps of 1, adding C2-C6 carboxylic acid to water, and then adding hexadecylsulfonic acid sodium salt while stirring to obtain a mixed solution; 2, heating the mixed solution to 30-50 DEG C, and adding polyoxyethylene polyoxypropylene block polyether to the mixed solution during heating; 3, adding d-limonene after uniform mixing and temperature reaches 30-50 DEG C, so that the demulsifier is obtained after uniform mixing, wherein polyoxyethylene polyoxypropylene block polyether accounts for 48-52 wt%, hexadecylsulfonic acid sodium salt accounts for 0.8-1.2 wt%, d-limonene accounts for 2-5 wt%, and C2-C6 carboxylic acid accounts for 10-15 wt%, and the balance is water. The demulsifier has the advantages of being high in dehydration rate and dehydration degree and the like.
Description
Technical field
The present invention relates to a kind of demulsifier, be specifically related to the preparation method of the demulsifier of sour crudes.
Background technology
At present, offshore oilfield is in crude oil extraction enters into exploitation late stage, along with improving constantly of moisture content, such as mud
Slurry is equally muddy, and clay content reaches about 5%, and owing to the particle diameter of clay is little, the surface area of granule is big, so absorbability is very
By force, in in-place oil reservoir, along with the stirring of the oil extraction pump in recovery process, particle surface can wrap up one layer of crude oil, enters
And form new emulsification system, referred to as " oil-mineral aggregates structure " (oil mineral aggregates, OMA).This knot
The emulsification system of structure, in entering into crude Treatment system, can cause oil-water interfaces in each section of separator of crude oil unclear, three-phase separate
From the device aqueous height of isolated oil phase, aqueous phase contains innage, and in some primary separator, the corrugated plating of design also results in blocking,
Causing system " to be paralysed " eventually, sewage disposal system is too high owing to the oil droplet carried and clay are mixed in composition, causes processing load mistake
Weight, there is " STOP " in the serious sewage operations system that also results in.
This fine insoluble solid particle has important effect to the stability of the new emulsification system of production fluid, typically
Think that the clay particle of these different nominal particle size can form space net structure on profit molecular interface film, this of formation
Plant structure and the coalescence between profit drop is played machinery inhibition, be that this OMA new system emulsion stability strengthens.For a long time
The clay particle contacted with crude oil can adsorb the colloid in crude oil, asphalitine, makes surface of clay have a slightly water-wet, thus shadow
Ring the stability of crude oil production fluid.
Existing demulsifier can not well be applicable to sour crudes, and still existence can not reach asking of preferable demulsification
Topic, therefore needs a kind of better novel demulsifier being applicable to crude oil of research and development badly.
Summary of the invention
The technical problem to be solved is: existing demulsifier can not well be applicable to sour crudes, and still
The problem that existence can not reach preferable demulsification, it is provided that solve the preparation side of the demulsifier of the sour crudes of the problems referred to above
Method.
The present invention is achieved through the following technical solutions:
The preparation method of the demulsifier of sour crudes, including:
Step one, in water add C2～C6 carboxylic acid, the most under agitation add sodium cetanesulfonate obtain mixing molten
Liquid；
Step 2, is heated to 30～50 DEG C by mixed solution, again by polyoxyethylene polyoxypropylene block polyether in heating process
Add in mixed solution and mix；
Step 3, after mix homogeneously and after temperature reaches 30～50 DEG C, adds dextrorotation limonene mix homogeneously and makes breakdown of emulsion
Agent；
Above-mentioned polyoxyethylene polyoxypropylene block polyether is 48～52wt%, and sodium cetanesulfonate is 0.8～1.2wt%, dextrorotation
Limonene is 2～5wt%, C2～C6 carboxylic acid is 10～15wt%, and remaining is water.
Further, described C2～C6 carboxylic acid is ethanedioic acid, malonic acid, butanoic acid, succinic acid, 1,3-propanedicarboxylic acid, adipic acid, citric acid
In one or more.
Further, described C2～C6 carboxylic acid is made up of the 1,3-propanedicarboxylic acid that weight ratio is 1: 2 and citric acid.
Preferably, described polyoxyethylene polyoxypropylene block polyether is the polyoxyethylene polyoxy of the numbered 9003-11-6 of CAS
Propylene ether.
As optimal effectiveness, described polyoxyethylene polyoxypropylene block polyether is 51wt%, sodium cetanesulfonate is
0.8wt%, dextrorotation limonene be 6wt%, C2～C6 carboxylic acid be 15wt%.
The present invention compared with prior art, has such advantages as and beneficial effect:
1, the present invention can be effective to the breakdown of emulsion of sour crudes, and the present invention has that rate of water loss is fast, degree of dehydration advantages of higher；
2, the present invention is with low cost, preparation technology is simple, steady quality.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment, the present invention is made
Further describing in detail, the exemplary embodiment of the present invention and explanation thereof are only used for explaining the present invention, are not intended as this
The restriction of invention.
Embodiment 1
The preparation method of the demulsifier of sour crudes, including:
Step one, in water add C2～C6 carboxylic acid, the most under agitation add sodium cetanesulfonate obtain mixing molten
Liquid；
Step 2, is heated to 30～50 DEG C by mixed solution, again by polyoxyethylene polyoxypropylene block polyether in heating process
Add in mixed solution and mix；
Step 3, after mix homogeneously and after temperature reaches 30～50 DEG C, adds dextrorotation limonene mix homogeneously and makes breakdown of emulsion
Agent；
Above-mentioned polyoxyethylene polyoxypropylene block polyether is 48～52wt%, and sodium cetanesulfonate is 0.8～1.2wt%, dextrorotation
Limonene is 2～5wt%, C2～C6 carboxylic acid is 10～15wt%, and remaining is water.
In the present embodiment this polyoxyethylene polyoxypropylene block polyether be 51wt%, sodium cetanesulfonate be 0.8wt%, the right side
Rotation limonene be 6wt%, C2～C6 carboxylic acid be 15wt%；C2～C6 carboxylic acid is 1,3-propanedicarboxylic acid；Described polyoxyethylene polyoxypropylene block
Polyethers is the polyoxyethylene poly-oxygen propylene aether of the numbered 9003-11-6 of CAS.
Embodiment 2
The present embodiment is with the difference of embodiment 1, and in the present embodiment, C2～C6 carboxylic acid is citric acid.
Embodiment 3
The present embodiment is with the difference of embodiment 1, in the present embodiment C2～C6 carboxylic acid be weight ratio be 1,3-propanedicarboxylic acid and the lemon of 1: 2
Lemon acid.
Embodiment 4
The present embodiment is with the difference of embodiment 3, and in the present embodiment, the ratio of each component is different；
In the present embodiment this polyoxyethylene polyoxypropylene block polyether be 48wt%, sodium cetanesulfonate be 1.2wt%, dextrorotation terpene
Diene be 8wt%, C2～C6 carboxylic acid be 13wt%；Remaining is water.
Embodiment 5
The present embodiment is with the difference of embodiment 3, and in the present embodiment, the ratio of each component is different；
In the present embodiment this polyoxyethylene polyoxypropylene block polyether be 52wt%, sodium cetanesulfonate be 1wt%, dextrorotation terpene two
Alkene be 5wt%, C2～C6 carboxylic acid be 10wt%；C2～C6 carboxylic acid is 1,3-propanedicarboxylic acid；Remaining is water.
Embodiment 6
The present embodiment is the comparative example of embodiment 3-5, and the present embodiment is with the difference of embodiment 3-5, in the present embodiment
The ratio of each component is different；
In the present embodiment this polyoxyethylene polyoxypropylene block polyether be 55wt%, sodium cetanesulfonate be 0.5wt%, dextrorotation terpene
Diene be 10wt%, C2～C6 carboxylic acid be 6wt%；Remaining is water.
The demulsifier utilizing the present invention to prepare carries out contrast test, experimental temperature 50 DEG C to the Produced Liquid of sour crudes, breaks
Emulsion adding consistency 20ppm, after addition, oil well produced liquid is separated into water layer, emulsifying liquid layer and silt by the effect of demulsifier
Layer, the dehydration rate (%) of each embodiment finished product demulsifier, dehydration rate=water layer volume/overall volume * under the different dewatering time of detection
100%, the quality of demulsifier is judged by the contrast of dehydration rate (%), concrete testing result is as shown in table 1, the sky in table 1 below
White group is without result of the test during demulsifier.
Table 1
Isolating the moisture content (%) of emulsion layer during detection 2h, concrete testing result is as shown in table 2 simultaneously,
Table 2
By upper table 1, table 2, use the proportioning of the present invention, rate of water loss, degree of dehydration can be effectively improved, crude oil after dehydration
Moisture content less.
Above-described detailed description of the invention, has been carried out the purpose of the present invention, technical scheme and beneficial effect further
Describe in detail, be it should be understood that the detailed description of the invention that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, all should comprise
Within protection scope of the present invention.
Claims (5)
1. the preparation method of the demulsifier of sour crudes, it is characterised in that including:
Step one, in water add C2～C6 carboxylic acid, the most under agitation add sodium cetanesulfonate obtain mixing molten
Liquid；
Step 2, is heated to 30～50 DEG C by mixed solution, again by polyoxyethylene polyoxypropylene block polyether in heating process
Add in mixed solution and mix；
Step 3, after mix homogeneously and after temperature reaches 30～50 DEG C, adds dextrorotation limonene mix homogeneously and makes breakdown of emulsion
Agent；
Above-mentioned polyoxyethylene polyoxypropylene block polyether is 48～52wt%, and sodium cetanesulfonate is 0.8～1.2wt%, dextrorotation
Limonene is 2～5wt%, C2～C6 carboxylic acid is 10～15wt%, and remaining is water.
The preparation method of the demulsifier of sour crudes the most according to claim 1, it is characterised in that described C2～C6 carboxylic
Acid is one or more in ethanedioic acid, malonic acid, butanoic acid, succinic acid, 1,3-propanedicarboxylic acid, adipic acid, citric acid.
The preparation method of the demulsifier of sour crudes the most according to claim 2, it is characterised in that described C2～C6 carboxylic
Acid is made up of the 1,3-propanedicarboxylic acid that weight ratio is 1: 2 and citric acid.
4. according to the preparation method of the demulsifier of the sour crudes described in claim 1 or 2 or 3, it is characterised in that described poly-
Oxygen ethylene oxypropylene block polyethers is the polyoxyethylene poly-oxygen propylene aether of the numbered 9003-11-6 of CAS.
The preparation method of the demulsifier of sour crudes the most according to claim 4, it is characterised in that described polyoxyethylene
Oxypropylene block polyethers is 51wt%, sodium cetanesulfonate is 0.8wt%, dextrorotation limonene is that 6wt%, C2～C6 carboxylic acid is
15wt%。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610415749.1A CN105885927A (en) | 2016-06-15 | 2016-06-15 | Method for preparing demulsifier for sour crude oil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610415749.1A CN105885927A (en) | 2016-06-15 | 2016-06-15 | Method for preparing demulsifier for sour crude oil |
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| CN105885927A true CN105885927A (en) | 2016-08-24 |
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| CN201610415749.1A Pending CN105885927A (en) | 2016-06-15 | 2016-06-15 | Method for preparing demulsifier for sour crude oil |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102140365A (en) * | 2010-01-28 | 2011-08-03 | 中国石油化工集团公司 | Acid-containing crude oil demulsifying agent and preparation method thereof |
| US20140360920A1 (en) * | 2013-06-05 | 2014-12-11 | Instituto Mexicano Del Petroleo | Process for demulsification of crude oil in water emulsions by means of natural or synthetic amino acid-based demulsifiers |
| CN105062551A (en) * | 2015-09-16 | 2015-11-18 | 天津亿利科能源科技发展股份有限公司 | Demulsifying agent for treating sand-containing crude oil |
-
2016
- 2016-06-15 CN CN201610415749.1A patent/CN105885927A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102140365A (en) * | 2010-01-28 | 2011-08-03 | 中国石油化工集团公司 | Acid-containing crude oil demulsifying agent and preparation method thereof |
| US20140360920A1 (en) * | 2013-06-05 | 2014-12-11 | Instituto Mexicano Del Petroleo | Process for demulsification of crude oil in water emulsions by means of natural or synthetic amino acid-based demulsifiers |
| CN105062551A (en) * | 2015-09-16 | 2015-11-18 | 天津亿利科能源科技发展股份有限公司 | Demulsifying agent for treating sand-containing crude oil |
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Application publication date: 20160824 |
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