CN105861036A - Preparation method of composite demulsifier for crude oil - Google Patents
Preparation method of composite demulsifier for crude oil Download PDFInfo
- Publication number
- CN105861036A CN105861036A CN201610421856.5A CN201610421856A CN105861036A CN 105861036 A CN105861036 A CN 105861036A CN 201610421856 A CN201610421856 A CN 201610421856A CN 105861036 A CN105861036 A CN 105861036A
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- Prior art keywords
- acid
- preparation
- crude oil
- carboxylic acid
- demulsifier
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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
-
- 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
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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 preparation method of composite demulsifier for crude oil and solves the problem that existing demulsifier cannot achieve the ideal demulsification effect. The preparation method includes the steps that 1, C2-C6 carboxylic acid is added to water, then polyoxyethylene poly propylene oxygen block polyether is added under the condition of stirring, and a mixed solution is obtained; 2, the mixed solution is heated to 30-50 DEG C, and hexadecyl sodium sulfonate is added in the heating process; 3, after the temperature reaches 30-50 DEG C, lauramidopropyl betaine is added, the mixture is mixed to be uniform, and the demulsifier is obtained; the composite demulsifier is prepared from, by weight, 48-525% of the polyoxyethylene poly propylene oxygen block polyether, 0.8-1.2% of the hexadecyl sodium sulfonate, 2-5% of the lauramidopropyl betaine, 10-15% of the C2-C6 carboxylic acid and the balance water. The preparation method has the advantages of being high in dewatering rate, high in dewatering degree and the like.
Description
Technical field
The present invention relates to a kind of demulsifier, be particularly used for the preparation method of the composite demulsifying agent of crude oil.
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.
Still there is the problem that can not reach preferable demulsification in existing demulsifier, therefore needs research and development badly a kind of better
It is applicable to the novel demulsifier of crude oil.
Summary of the invention
The technical problem to be solved is: existing demulsifier still exists can not reach asking of preferable demulsification
Topic, it is provided that solve the preparation method of the composite demulsifying agent for crude oil of the problems referred to above.
The present invention is achieved through the following technical solutions:
For the preparation method of the composite demulsifying agent of crude oil, including:
Step one, in water add C2～C6 carboxylic acid, the most under agitation add polyoxyethylene polyoxypropylene block polyether
Prepare mixed solution；
Step 2, is heated to 30～50 DEG C by mixed solution, adds sodium cetanesulfonate in heating process；
Step 3, after temperature reaches 30～50 DEG C, adds lauroylamidopropyl betaine, i.e. makes breakdown of emulsion after mix homogeneously
Agent；
Above-mentioned polyoxyethylene polyoxypropylene block polyether is 48～52wt%, and sodium cetanesulfonate is 0.8～1.2wt%, Laurel
Amido propyl betaine 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%, lauroylamidopropyl betaine be 3wt%, C2～C6 carboxylic acid be 15wt%.
The present invention compared with prior art, has such advantages as and beneficial effect:
1, the demulsifier of the present invention has the advantage that rate of water loss is fast, degree of dehydration is high；
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
For the preparation method of the composite demulsifying agent of crude oil, including:
Step one, in water add C2～C6 carboxylic acid, the most under agitation add polyoxyethylene polyoxypropylene block polyether
Prepare mixed solution；
Step 2, is heated to 30～50 DEG C by mixed solution, adds sodium cetanesulfonate in heating process；
Step 3, after temperature reaches 30～50 DEG C, adds lauroylamidopropyl betaine, i.e. makes breakdown of emulsion after mix homogeneously
Agent；
Above-mentioned polyoxyethylene polyoxypropylene block polyether is 48～52wt%, and sodium cetanesulfonate is 0.8～1.2wt%, Laurel
Amido propyl betaine 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 moon
Osmanthus amido propyl betaine be 3wt%, C2～C6 carboxylic acid be 15wt%；C2～C6 carboxylic acid is 1,3-propanedicarboxylic acid；Described polyoxyethylene polyoxy
Polypropylene 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%, lauroyl
Amine CAB be 2wt%, 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%, lauramide
CAB 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%, lauroyl
Amine CAB be 8wt%, C2～C6 carboxylic acid be 6wt%；Remaining is water.
The demulsifier utilizing the present invention to prepare carries out contrast test, experimental temperature 50 to argillaceous composition oil well produced liquid
DEG C, demulsifier adding consistency 10ppm, the dehydration rate (%) of each embodiment finished product demulsifier under the different dewatering time of detection, by de-
Water rate (%) judges the quality of demulsifier, and concrete testing result is as shown in table 1, and blank group in table 1 below is without demulsifier
Time result of the test.
Table 1
The moisture content (%) of emulsifying liquid layer after detection separates simultaneously, concrete testing result is as shown in table 2,
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.
By upper table 1, use the proportioning of the present invention, rate of water loss, degree of dehydration can be effectively improved.
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. it is used for the preparation method of the composite demulsifying agent of crude oil, it is characterised in that including:
Step one, in water add C2～C6 carboxylic acid, the most under agitation add polyoxyethylene polyoxypropylene block polyether
Prepare mixed solution；
Step 2, is heated to 30～50 DEG C by mixed solution, adds sodium cetanesulfonate in heating process；
Step 3, after temperature reaches 30～50 DEG C, adds lauroylamidopropyl betaine, i.e. makes breakdown of emulsion after mix homogeneously
Agent；
Above-mentioned polyoxyethylene polyoxypropylene block polyether is 48～52wt%, and sodium cetanesulfonate is 0.8～1.2wt%, Laurel
Amido propyl betaine is 2～5wt%, C2～C6 carboxylic acid is 10～15wt%, and remaining is water.
The preparation method of the composite demulsifying agent for crude oil 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 composite demulsifying agent for crude oil 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 composite demulsifying agent for crude oil described in claim 1 or 2 or 3, it is characterised in that described
Polyoxyethylene polyoxypropylene block polyether is the polyoxyethylene poly-oxygen propylene aether of the numbered 9003-11-6 of CAS.
The preparation method of the composite demulsifying agent for crude oil the most according to claim 4, it is characterised in that described polyoxy second
Alkene oxypropylene block polyethers is 51wt%, sodium cetanesulfonate is 0.8wt%, lauroylamidopropyl betaine is 3wt%, C2
～C6 carboxylic acid is 15wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610421856.5A CN105861036A (en) | 2016-06-15 | 2016-06-15 | Preparation method of composite demulsifier for crude oil |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610421856.5A CN105861036A (en) | 2016-06-15 | 2016-06-15 | Preparation method of composite demulsifier for crude oil |
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| CN105861036A true CN105861036A (en) | 2016-08-17 |
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| CN201610421856.5A Pending CN105861036A (en) | 2016-06-15 | 2016-06-15 | Preparation method of composite demulsifier for crude oil |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103374386A (en) * | 2012-04-13 | 2013-10-30 | 中国石油化工股份有限公司 | Composite demulsifying agent |
| CN103642518A (en) * | 2013-12-10 | 2014-03-19 | 天津亿利科能源科技发展股份有限公司 | High-water-cut heavy oil demulsifier used for oil fields 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 |
| CN104449813A (en) * | 2014-11-10 | 2015-03-25 | 天津亿利科能源科技发展股份有限公司 | Emulsion breaker for oil-water separation by efficiently treating crude oil with high clay component content on offshore oil field |
| CN104818049A (en) * | 2015-04-12 | 2015-08-05 | 无棣华信石油技术服务有限公司 | Environment-friendly type low temperature resistant crude oil demulsifier and preparation method thereof |
| CN105001906A (en) * | 2015-07-30 | 2015-10-28 | 宁波中一石化科技股份有限公司 | Device and method for removing water and metal salt in crude oil |
| 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 |
| CN105087057A (en) * | 2015-07-30 | 2015-11-25 | 宁波中一石化科技股份有限公司 | Device and method for removing water soluble salt in crude oil |
| CN105504143A (en) * | 2014-09-26 | 2016-04-20 | 中国石油化工股份有限公司 | Non-polyether demulsifier and preparation method thereof |
-
2016
- 2016-06-15 CN CN201610421856.5A patent/CN105861036A/en active Pending
Patent Citations (9)
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|---|---|---|---|---|
| CN103374386A (en) * | 2012-04-13 | 2013-10-30 | 中国石油化工股份有限公司 | Composite demulsifying agent |
| 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 |
| CN103642518A (en) * | 2013-12-10 | 2014-03-19 | 天津亿利科能源科技发展股份有限公司 | High-water-cut heavy oil demulsifier used for oil fields and preparation method thereof |
| CN105504143A (en) * | 2014-09-26 | 2016-04-20 | 中国石油化工股份有限公司 | Non-polyether demulsifier and preparation method thereof |
| CN104449813A (en) * | 2014-11-10 | 2015-03-25 | 天津亿利科能源科技发展股份有限公司 | Emulsion breaker for oil-water separation by efficiently treating crude oil with high clay component content on offshore oil field |
| CN104818049A (en) * | 2015-04-12 | 2015-08-05 | 无棣华信石油技术服务有限公司 | Environment-friendly type low temperature resistant crude oil demulsifier and preparation method thereof |
| CN105001906A (en) * | 2015-07-30 | 2015-10-28 | 宁波中一石化科技股份有限公司 | Device and method for removing water and metal salt in crude oil |
| CN105087057A (en) * | 2015-07-30 | 2015-11-25 | 宁波中一石化科技股份有限公司 | Device and method for removing water soluble salt in crude oil |
| 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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| Title |
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