CN1253984A - Multicomponent crude oil demulsification dehydration additive - Google Patents

Multicomponent crude oil demulsification dehydration additive Download PDF

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CN1253984A
CN1253984A CN 98114465 CN98114465A CN1253984A CN 1253984 A CN1253984 A CN 1253984A CN 98114465 CN98114465 CN 98114465 CN 98114465 A CN98114465 A CN 98114465A CN 1253984 A CN1253984 A CN 1253984A
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component
additive
content
crude oil
add
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CN1106443C (en
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黎元生
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Sinopec Fushun Research Institute of Petroleum and Petrochemicals
China Petrochemical Corp
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Sinopec Fushun Research Institute of Petroleum and Petrochemicals
China Petrochemical Corp
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Abstract

The present invention discloses a crude oil demulsification additive using water-soluble organic cationic polymer and inorganic polymerized aluminium salt as main active components and its method for crude oil demulsification and dehydration. Said additive can be compounded with existent crude oil demulsifer polyoxyethylene polyoxypropylene high-grade alcohol ether, it not only can reduce the cost of demulsifer, but also can raise its demulsification and dehydration capacity by 10-30%.

Description

A kind of multicomponent crude oil demulsification dehydration additive
The present invention relates to a kind of preparation and using method of crude oil demulsification dehydration additive.
Oil is often sneaked into large quantity of moisture in recovery process.Especially the application of displacement of reservoir oil by filling water and other secondary oil recovery, tertiary oil recovery technology makes in the extraction crude oil moisture more.Well head crude oil is told the emulsified water that generally still contains 10～30w% behind the free-water, and the existence of big water gaging increases the transportation of crude oil and tooling cost, so crude oil is being carried and first being processed is wanted earlier to make water-content reach prescribed value through dewatering.The breaking emulsion and dewatering of crude oil is an important step of field produces always.
The emulsified water that removes in the crude oil needs elder generation with the emulsion of crude oil breakdown of emulsion, and the breakdown of emulsion process generally need add emulsion splitter.Therefore the emulsion splitter of developing economical and efficient is one of focus of oilfield chemistry worker concern always.Crude oil demulsification generally adopts the polyethers emulsion splitter, and traditional senior alcohol ether of emulsion splitter polyoxyethylene polyoxypropylene (commercial disignation SP169) still extensively adopts in the oil field so far.Shortcomings such as the SP169 price is higher, and it is incomplete to exist breakdown of emulsion, and the low consumption of efficient is big.Simultaneously, many novel emulsion splitters are continually developed out and are applied in some oil fields, and for example Nalco company proposes to obtain the polyphosphazene polymer ether derivant as crude oil demulsifier with high-molecular weight resol and oxyethane or propylene oxide addition reaction in U.S. Pat 5460750.Petrolite company then proposes many ethyls polyamines polyoxyethylene poly-oxygen propylene aether mixed with two kinds of polyethers (polyoxyethylene polyoxypropylene alkyl diol ether and polyoxyethylene polyoxypropylene alkyl phenol ether) in U.S. Pat 4626379 and carries out product after the part condensation as crude oil demulsifier.These emulsion splitter prices are more expensive, and its price significantly increases the crude oil demulsification dehydration cost up to tens thousand of units/ton.
The objective of the invention is to find a kind of high efficiency crude oil demulsification method, adopt this method can under the prerequisite that the crude oil demulsification cost is reduced, improve breaking emulsion and dewatering efficient.Another object of the present invention is a kind of composite additive of preparation, and this additive can significantly improve the demulsification of polyethers crude oil demulsifier and reduce the breakdown of emulsion cost.
Composite additive of the present invention is to be mixed with component C by component A, B component to add lower alcohol dilution again and obtain.Wherein component A has general formula
Figure A9811446500051
Cationic polymers, R wherein 1Can be C 1-3Hydroxyalkyl, also can be C 1-3Alkyl or hydrogen; R 2Be C 1～6Alkylidene; R 3Be C 2～3Hydroxyalkyl; R 4Be the C that contains hydroxyalkyl 2～3Alkylidene, R 4Carbonatoms can and R 3Identical, also can be different, n=10～20.B component has following general formula
R 1 R 2-N=CR 3-NH-CN-R 4 nR 1The nitrogen containing polymer water-soluble polymers.R wherein 1Be C 1～3Alkyl or hydrogen; R 2Be methyne or the ethylidine that has hydroxyl; R 3Can be an amido, also can be a hydroxyl or methyl; R 4Also be methyne or the ethylidine that has hydroxyl, R 4Can and R 2Identical, also can be different, n=10～20.Component C then is inorganic polyaluminium salts, can be polymerize aluminum chloride, also can be polyaluminium sulfate.
In the compound demulsifying additive of the present invention, the content of component A is 0.01～10w%, is preferably 0.1～5w%, is preferably 0.2～2w%; The content of B component is 0.01～15w%, is preferably 0.5～10w%, is preferably 1～5w%; The content of component C is 0.1～15w%, is preferably 1～10w%, is preferably 2～8w%; The lower alcohol thinner is equal amount (supplying 100%).Lower alcohol as thinner can be a methyl alcohol, also can be ethanol.This additive is joined composite use in the SP169 emulsion splitter, and add-on is 3～40w%, is preferably 5～30w%, is preferably 10～20w%.
Compound demulsifying additive preparation process of the present invention comprises:
At first in a reactor that has a stirring system, synthesize a kind of linear low-molecular weight polymer of amine that has a plurality of hydroxy functional groups.Building-up process is: add polyamines type organic R in reactor 1-N-R 2-NR 1(compound a) adds epoxy compounds (compound b) when being heated to 20～60 ℃, as propylene oxide, oxyethane etc., at 30-150 ℃, reacted 1-24 hour, and 50～100 ℃ were reacted 3～8 hours down more fortunately, formed intermediate product and replaced amine R 1-N (R 3)-R 2-N (R 3)-R 1(compound c).Add again and have general formula X-R 4The bifunctional organism (compound d) of-Y, wherein X and Y can be chlorine, bromine, also can be epoxy group(ing) or thiazolinyl, X and Y cannot be identical, R 4Be C 1～3Alkylidene.Reacting 1～24 hour down at 50～180 ℃ after adding compound d, better is 70-150 ℃ of reaction 4-12 hour, gets component A.Various material mole proportionings are a: b=1: 0.1～10, and better be 1: 0.5～5, c: d=1: 0.1～10, better be 1: 0.5-3.
The another kind of organic cationic polymer B component that the present invention relates to is that wherein R is methyne or the ethylidine that has amido by the condensation product of amine-containing compound NR-NH-CN (compound f) with formaldehyde.Get the formaldehyde and the compound f of specified amount when synthetic, the two molar ratio is 1: 0.5～10, better is 1: 1～5, reacts 2～10 hours down at 30～150 ℃, better is 60～110 ℃ of reactions 3～6 hours.
Component A, B, C and lower alcohol are mixed in proportion, obtain the compound demulsifying additive.Wherein the content of component A is 0.01～10w%, is preferably 0.1～5w%, is preferably 0.2～2w%; The content of B component is 0.01～15w%, is preferably 0.5～10w%, is preferably 1～5w%; The content of component C is 0.1～15w%, is preferably 1～10w%, is preferably 2～8w%.This additive is joined composite use in the SP169 emulsion splitter, and add-on is 3～40w%, is preferably 5～30%, is preferably 10～20w%.
Advantage of the present invention is to have adopted three kinds of demulsifier compounds of the performance complement that can play breakdown of emulsion, throwing out simultaneously, and the additive that obtains is used with polyether demulsification agent again, and breakdown of emulsion efficient is greatly improved.Another advantage of the present invention be the cost of this additive far below the SP169 emulsion splitter, use the present invention when improving breaking emulsion and dewatering efficient, total cost significantly to be reduced.
Following application example further specifies advantage of the present invention.
Embodiment 1
At a volume that has stirring system, thermometer, condensing reflux is in the there-necked flask of 1L, add the quadrol of 60 grams and the propylene oxide of 116 grams, temperature is controlled at 60 ℃, and reaction was carried out 4 hours to such an extent that intermediate product replaces amine, this product is a colourless transparent liquid, add 92.5 gram Epicholorohydrins then, temperature is 70 ℃, after reaction is carried out 5 hours, make it be cooled to room temperature, and then adding 120 gram hydrochloric acid, products therefrom is to be component A for combining the look dope 1
Embodiment 2
In a there-necked flask that has stirring system, thermometer and a prolong, add triethylenetetramine 73.12 grams, add simple function group compound oxyethane 88 grams, temperature maintenance is at 120 ℃, reaction was carried out 12 hours, add bifunctional compound Ethylene Dichloride 40 grams then, reacted 18 hours down at 150 ℃, add technical hydrochloric acid 67 grams at last, obtain component A 2
Embodiment 3
With a volume is that three mouthfuls of reaction flasks of 1000ml place water-bath, add the hexanediamines of 116 grams and make warming-in-water to 40 ℃, add 116 gram propylene oxide again, temperature is controlled at 80 ℃ and keeps reaction in 7 hours, obtain compound c, and then add epoxy chloropropane 73.9 grams of bifunctional, make temperature of reaction be controlled at 110 ℃ and continue 10 hours, add 120 gram hydrochloric acid at last, and make its cool to room temperature promptly get component A 3
Embodiment 4
Add Dyhard RU 100 80 grams in a there-necked flask that has stirring system, thermometer and a prolong, formaldehyde 78 grams 75 ℃ of reactions 5 hours, obtain B component 1
Embodiment 5
Add trimeric cyanamide 84 grams in a there-necked flask that has stirring system, thermometer and a prolong, formaldehyde 51 grams add 31 gram ammonium chlorides then and make catalyzer, 112 ℃ of reactions 5 hours, obtain B component 2Embodiment 6～19
Component A, B and polyaluminium sulfate C that above-mentioned each example is obtained mix by different ratios, add diluent ethanol again, obtain embodiment 6～12 additives.Component A, B and polymerize aluminum chloride C that example 1 and example 2 are obtained mix by different ratios, add thinner methyl alcohol again, obtain embodiment 13～19 additives.Embodiment 7～12 additive formulations see Table 1, and embodiment 13～19 additives see Table 2.Table 1 embodiment 6～12 additive formulations
Embodiment Component A, w% B component, w% Component C (polyaluminium sulfate), w% Thinner (ethanol), w%
????6 A 1?0.08 B 1??3.56 ?????1.33 ????95
????7 A 1?0.84 B 2??8.05 ?????13.11 ????78
????8 A 2?1.91 B 1??2.66 ?????5.00 ????90
????9 A 2?2.66 B 2??7.32 ?????1.78 ????88
????10 A 3?3.56 B 1??1.06 ?????3.56 ????92
????11 A 3?4.54 B 2??6.11 ?????0.44 ????89
????12 A 3?1.23 B 1??4.44 ?????6.22 ????88
Table 2 embodiment 13～19 additive formulations
Embodiment Component A, w% B component, w% Component C (polymerize aluminum chloride), w% Thinner (methyl alcohol), w%
????13 A 1??6.20 ????B 1??2.67 ?????8.00 ????83
????14 A 1??7.12 ????B 2??0.10 ?????0.89 ????90
????15 A 2??1.06 ????B 1??11.22 ?????2.67 ????85
????16 A 2??2.00 ????B 2??5.25 ?????14.0 ????79
????17 A 3??3.40 ????B 1??3.43 ?????4.00 ????89
????18 A 3??0.24 ????B 2??2.02 ?????6.00 ????91
????19 A 3??10.05 ????B 1??1.00 ?????6.00 ????83
Embodiment 20～33, Comparative Examples 1
Embodiment 20～33 explanations breaking additive of the present invention can improve the breaking emulsion and dewatering ability of polyether demulsification agent.Experimentation is as follows: the emulsion of crude oil of the 10mL moisture 16% that packs in the 10mL graduated cylinder, add SP169 emulsion splitter and a certain proportion of additive of the present invention (embodiment 20～26), or the SP169 emulsion splitter of mixed additive (embodiment 27～33) in proportion, SP169 emulsion splitter and additive of the present invention adding total amount in emulsion of crude oil is 100 μ g/g.Add and put into 80 ℃ of thermostat containers after emulsion of crude oil after the agent shakes up, the mL number of the water yield told in record behind the certain hour, and experimental result sees Table 3.Additive add-on percentage ratio has been represented the ratio with the SP169 emulsion splitter in the table, and for example the additive add-on is 10w%, and expression always adds that additive of the present invention accounts for 10w% in the agent, and the SP169 emulsion splitter accounts for 90w%.Added the SP169 emulsion splitter of 100 μ g/g in Comparative Examples 1 experiment when other condition is all identical, has not added additive of the present invention, branch regimen condition shows it is that branch water speed or minute water inventory all are lower than the embodiment of the invention.Table 3
Embodiment Additive Additive add-on w% 1 hour branch water yield mL 2 hours branch water yield mL
????20 Embodiment 6 ????7 ????1.55 ?????1.57
????21 Embodiment 7 ????5 ????1.50 ?????1.53
????22 Embodiment 8 ????8 ????1.62 ?????1.63
????23 Embodiment 9 ????10 ????1.50 ?????1.53
????24 Embodiment 10 ????10 ????1.80 ?????1.83
????25 Embodiment 11 ????15 ????1.55 ?????1.58
????26 Embodiment 12 ????15 ????1.80 ?????1.81
????27 Embodiment 13 ????20 ????1.60 ?????1.62
????28 Embodiment 14 ????20 ????1.55 ?????1.56
????29 Embodiment 15 ????25 ????1.50 ?????1.54
????30 Embodiment 16 ????25 ????1.85 ?????1.85
????31 Embodiment 17 ????30 ????1.80 ?????1.82
????32 Embodiment 18 ????30 ????1.44 ?????1.50
????33 Embodiment 19 ????35 ????1.40 ?????1.46
Comparative Examples 1 ????0 ????1.31 ?????1.45
Embodiment 34～35, and Comparative Examples 2～5 embodiment 34～35 and Comparative Examples 2～5 explanations additive of the present invention join and be used for the water-content that dehydrating of crude oil can significantly reduce crude oil under the same conditions in the emulsion splitter.
The experimentation of embodiment 34～35 and Comparative Examples 2～5 is as follows: the 200mL emulsion of crude oil of packing in the 250mL separating funnel, the emulsion splitter and the additive that add specified amount, put into 80 ℃ of thermostat containers after shaking up, take out after one hour, bleed off the moisture of telling, press the GB260 method then and survey content of residual water in the oil, experimental result sees Table 4.Used emulsion of crude oil is taken from the Liaohe Oil Field.Test-results when table 4 additive is used for SP169 emulsion splitter processing crude oil
Embodiment SP169 emulsion splitter add-on μ g/g Additive add-on μ g/g The moisture w% of dehydrated oil
Embodiment 34 ????85 ????15 ?????2.41
Embodiment 35 ????85 ????15 ?????3.00
Comparative Examples 2 ????100 ????0 ?????6.30
Comparative Examples 3 ????85 ????0 ?????7.10
Comparative Examples 4 ????100 ????0 ?????7.90
Comparative Examples 5 ????85 ????0 ?????9.01
Embodiment 36～40, Comparative Examples 6
Though embodiment 36～40 and Comparative Examples 6 explanations additive of the present invention be deposit separately or with deposit the ability that does not influence additive enhancing demulsification after emulsion splitter mixes.
Embodiment 36～40 and Comparative Examples 6 experimentations are as follows: the additive that makes 5Kg the present invention in the laboratory, taking out a part mixes with SP169, obtain homogeneous de-emulsifier SP 169, additive of the present invention and emulsion splitter 169 separated deposit are done the breakdown of emulsion evaluation test again after 10 days and 30 days.It is 100 μ g/g (comprising additive) that the evaluation test emulsion splitter adds total amount, and test oil is a Liaohe River viscous crude emulsion, and test-results sees Table 5.The shelf test result of table 5 additive
Embodiment The emulsion splitter Storage Format Additive level, w% Shelf-time, day The moisture w% of dewatered oil
Embodiment 36 Deposit behind the mixing additive ????15 ????10 ?????2.91
Embodiment 37 Deposit behind the mixing additive ????20 ????10 ?????3.21
Embodiment 38 Deposit behind the mixing additive ????15 ????30 ?????2.94
Embodiment 39 Deposit behind the mixing additive ????20 ????30 ?????3.26
Embodiment 40 Additive is deposited to test and is added in the emulsion splitter ????15 ????10 ?????2.87
Comparative Examples 6 ????0 ?????8.12

Claims (8)

1, a kind of multicomponent crude oil demulsification dehydration additive is characterized in that containing component A, B component, component C and lower alcohol, and wherein component A has general formula Cationic polymers, R 1Can be C 1-3Hydroxyalkyl, also can be C 1-3Alkyl or hydrogen; R 2Be C 1～6Alkylidene; R 3Be C 2～3Hydroxyalkyl; R 4Be the C that contains hydroxyalkyl 2～3Alkylidene, R 4The charcoal atomicity can and R 3Identical, also can be different, n=10～20;
B component is to have general formula
R 1 R 2-N=CR 3-NH-CN-R 4 nR 1The nitrogen containing polymer polymkeric substance, R 1Be C 1～3Alkyl or hydrogen; R 2Be methyne or the ethylidine that has hydroxyl; R 3Can be an amido, also can be a hydroxyl or methyl; R 4Also be methyne or the ethylidine that has hydroxyl, R 4Can and R 2Identical, also can be different, n=10～20;
Component C is a polyaluminium salts, and the content of component A is 0.01～10w% in the additive, and the content of B component is 0.01～15w%, and the content of component C is 0.1～15w%, and lower alcohol is an equal amount.
2, according to the additive of claim 1, wherein the content of component A is 0.1～5w%, and the content of B component is 0.5～10w%, and the content of component C is 0.5～10w%.
3, according to the additive of claim 1, wherein the content of component A is 0.2～2w%, and the content of B component is 1～5w%, and the content of component C is 2～8w%.
4, according to the additive of claim 1, it is characterized in that the preparation method of component A is: in reactor, add polyamines type organic R 1-N-R 2-NR 1, add epoxy compounds when being heated to 20～60 ℃, at 30-150 ℃, reacted 1-24 hour, form intermediate product and replace amine R 1-N (R 3)-R 2-N (R 3)-R 1, adding has general formula X-R again 4The bifunctional organism of-Y, wherein X and Y can be chlorine, bromine, also can be epoxy group(ing) or thiazolinyl, X and Y cannot be identical, R 4Be C 1～3Alkylidene.Add behind the bifunctional organism 50～180 ℃ following reaction 1～24 hour, wherein polyamine compounds and epoxy compounds mole proportioning are 1: 0.1～10, and intermediate product replacement amine and bifunctional organism mole proportioning are 1: 0.1～10.
5,, it is characterized in that being reflected at of polyamine compounds and epoxy compounds carried out under 50～100 ℃ 3～8 hours according to the additive of claim 4.
6,, it is characterized in that intermediate product replaces amine and organic being reflected at of bifunctional carried out under 70～150 ℃ 4～12 hours according to the additive of claim 4.
7,, it is characterized in that polyamine compounds and epoxy compounds reaction mass mole proportioning are 1: 0.5～5 according to the additive of claim 4.
8,, it is characterized in that intermediate product replaces amine and bifunctional organism reaction mass mole proportioning is 1: 0.5～3 according to the additive of claim 4.
CN98114465A 1998-11-13 1998-11-13 Multicomponent crude oil demulsification dehydration additive Expired - Fee Related CN1106443C (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1326589C (en) * 2004-11-23 2007-07-18 北京交通大学 Demulsifier with inorganic-polymer compound structure and its preparing method
CN100355863C (en) * 2003-01-29 2007-12-19 华东理工大学 Composite emulsion-breaking decalcifying agent for hydrocarbon oil
CN101768463A (en) * 2008-12-30 2010-07-07 倪文冰 Diesel caustic washing demulsifying agent composite and synthesis method thereof
CN102876356A (en) * 2011-07-14 2013-01-16 中国石油化工股份有限公司 Demulsifying dehydration method of oilfield produced liquid

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4626379A (en) * 1983-05-02 1986-12-02 Petrolite Corporation Demulsifier composition and method of use thereof
EP0260108B1 (en) * 1986-09-08 1992-10-14 Exxon Research And Engineering Company Hydrophobically functionalized cationic polymers
CN1051474C (en) * 1992-01-29 2000-04-19 大连石油化工公司有机合成厂 Process for preparing demulsifier for high-solidifiability oil
JP3066796B2 (en) * 1996-06-24 2000-07-17 神奈川県 Spicy electrode and method for producing the same
CN1100584C (en) * 1998-01-21 2003-02-05 辽河石油勘探局勘察设计研究院 Polymer type crude oil demulsifier

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100355863C (en) * 2003-01-29 2007-12-19 华东理工大学 Composite emulsion-breaking decalcifying agent for hydrocarbon oil
CN1326589C (en) * 2004-11-23 2007-07-18 北京交通大学 Demulsifier with inorganic-polymer compound structure and its preparing method
CN101768463A (en) * 2008-12-30 2010-07-07 倪文冰 Diesel caustic washing demulsifying agent composite and synthesis method thereof
CN102876356A (en) * 2011-07-14 2013-01-16 中国石油化工股份有限公司 Demulsifying dehydration method of oilfield produced liquid
CN102876356B (en) * 2011-07-14 2015-02-25 中国石油化工股份有限公司 Demulsifying dehydration method of oilfield produced liquid

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