CN1226076C - Depressor for colloidal state substance depositing on water-oil interface in electric dehydrator and method for preparing the same - Google Patents
Depressor for colloidal state substance depositing on water-oil interface in electric dehydrator and method for preparing the same Download PDFInfo
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- CN1226076C CN1226076C CN03142681.6A CN03142681A CN1226076C CN 1226076 C CN1226076 C CN 1226076C CN 03142681 A CN03142681 A CN 03142681A CN 1226076 C CN1226076 C CN 1226076C
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Abstract
The present invention relates to an inhibitor for colloidal substances depositing on an oil-water interface in an electric dehydrator and a preparing method thereof. The recipe of the current demulsifying agent can not solve the problem of a transition layer generated by colloidal substance particles on the oil-water interface. The present invention is characterized in that 1 wt% to 30 wt% of SP type nonionic surface active agent, 40 wt% to 96 wt% of AE type nonionic surface active agent, 0.1 wt% of 10 wt% of succinate sodium sulfonate, 1 wt% to 40 wt% of polyoxyethylene-polyoxypropylen alkyl phenol formaldehyde1 resin, 0.1 wt% to 10 wt% of glacial acetic acid are mixed and heated to 50 to 90 DEG C; the mixture is stirred for 2 hours at constant temperature and cooled to 30 to 40 DEGC; products are discharged; the inhibitor of final products is obtained. The inhibitor can effectively inhibit the transition layer generated by the colloidal substances on the oil-water interface, ensure the stable operation of the electric dehydrator and reduce the influence of the colloidal substances on a water treating system containing oil sewage; as a result, the quality of reinjected water is qualified; the inhibitor has the characteristics of low cost of wetting, demulsification and dehydration and high stability.
Description
Technical field:
The present invention relates to the used a kind of oilfield chemistry agent of dehydration of crude oil technology, belong to and prevent that colloidal materials is at inhibitor of electric dehydrator oil-water interfaces depositions and preparation method thereof.
Background technology:
The water content in crude oil of extraction is very high, to carry out the dehydration of crude oil at each multi-purpose station, one of method is to adopt electric dehydrator, electric dehydration utensil dehydration temperaturre is low, the advantage that treating capacity is big, under the effect of electric field, coalescent and the dipole coalescence of vibration takes place in the globule in the emulsified crude oil, reach the purpose of dehydration, sometimes owing to there being colloidal materials to produce transition zone in electric dehydrator oil-water interfaces deposition, this transition zone raises dehydration current, causes the electric field phenomenon that collapses when serious, and electric field recovers difficulty, the colloidal materials particle that collapses in the oil-polluted water deviate from the electric dehydrator behind the electric field also causes the oil-containing sewage treatment system intractability to strengthen re-injection water overproof water quality; The transition zone that non-colloidal materials produces at oil-water interfaces in the electric dehydrator, it mainly is water-oil emulsion, emulsion is that part water is dispersed in the crude oil with liquid pearl form and forms, water in the emulsion depends merely on sedimentation or other physical methods can not separate it, usually to add demulsifier and make its breaking emulsion and dewatering, method is to add a certain amount of demulsifier, through stirring, demulsifier is arrived on the oil-water interfaces of crude oil emulsion, reduce the absorption film strength, destroy emulsified state, the globule behind the breakdown of emulsion coalescent and sedimentation separation is mutually deviate from, and the transition zone that colloidal materials forms can't be removed with this demulsifier.
Summary of the invention:
Can not eliminate by the deficiency of colloidal materials particle in order to overcome existing demulsifier prescription at the transition zone of oil-water interfaces generation, the invention provides a kind of colloidal materials at electric dehydrator oil-water interfaces deposition inhibitor and preparation method thereof, this inhibitor can effectively suppress the transition zone that colloidal materials produces at oil-water interfaces, guarantee electric dehydrator stable operation, reducing colloidal particles influences oil-containing sewage treatment system, make re-injection water water quality qualified, have that wetting, breakdown of emulsion, dehydration, cost are low, the characteristics of good stability.
The technical solution adopted for the present invention to solve the technical problems is: this colloidal materials is achieved in that by weight percentage with SP type non-ionic surface active agent 1%～30% at electric dehydrator oil-water interfaces deposition inhibitor and preparation method thereof, AE type non-ionic surface active agent 40%～96%, succinate sodium sulfonate 1%～10%, polyoxyethylene polyoxypropylene alkylphenol formaldehyde resin 1%～40%, glacial acetic acid 1%～10% 5 kind of a mixing of materials is heated to 50～90 ℃, constant temperature stirred 2 hours, and discharging got the inhibitor of final products when temperature was reduced between 30～40 ℃.
Above-mentioned colloidal materials is at electric dehydrator oil-water interfaces deposition inhibitor, each composition and best proportioning are as follows by weight percentage: SP type non-ionic surface active agent 20%, AE type non-ionic surface active agent 50%, succinate sodium sulfonate 5%, polyoxyethylene polyoxypropylene alkylphenol formaldehyde resin 20%, glacial acetic acid 5%; Five kinds of mixing of materials heating optimum temperatures are 60 ℃; The general formula of SP type non-ionic surface active agent is:
Degree of polymerization m in the formula
1Be 10～40, k
1Be 200～400, m
2Be 5～20;
The general formula of AE type non-ionic surface active agent is:
A represents the block polymerization ether of expoxy propane oxirane in the formula, and its structural formula is:
Polymerization degree n is 4～9 in the formula, m is 10～100, k is 10～50;
The general formula of succinate sodium sulfonate is:
R in the formula
2Alkyl for carbon number 4～20;
The general formula of polyoxyethylene polyoxypropylene alkylphenol formaldehyde resin is:
R is that alkyl, the m of carbon number 4～20 are 10～40 in the formula, n is 10～50, x is 200～400.
The invention has the beneficial effects as follows, in electric dehydrator, add the surface wettability that this inhibitor can change original colloidal materials particle,, realize suppressing colloidal materials forms the profit transition zone at the electric dehydrator oil-water interfaces effect away from oil-water interfaces; In this inhibitor, also be added with an amount of demulsifier composition in addition, in dehydration of crude oil process, need not to add again demulsifier after adopting this inhibitor; This inhibitor guarantees electric dehydrator stable operation, and reducing colloidal particles influences oil-containing sewage treatment system, makes re-injection water water quality qualified.
The specific embodiment
The present invention is further illustrated below in conjunction with contrast experiment and embodiment:
To have general formula (1) SP type non-ionic surface active agent 1%～30% by weight percentage, have general formula (2) and (3) combination AE type non-ionic surface active agent 40%～96%, have general formula (4) succinate sodium sulfonate 1%～10%, have general formula (5) polyoxyethylene polyoxypropylene alkylphenol formaldehyde resin 1%～40%, glacial acetic acid 1%～10% 5 kind of a mixing of materials is heated to 50～90 ℃, preferred temperature is 60 ℃, constant temperature stirred 2 hours, and discharging got the inhibitor of final products when temperature was reduced between 30～40 ℃.
The trade names of above-mentioned SP type non-ionic surface active agent are the crude oil demulsifier product of SP169, and this demulsifier is that alcohol compound is the block polyether class of initiator, preferably its degree of polymerization m
1Be 35, k
1Be 273, m
2Be 10, the preferred weight percentage composition is 20%, have dispersion, breakdown of emulsion, dehydration, can make the colloidal materials dissolving on the oil-water interfacial film of crude oil or disperse, away from the interface, with the composite back of AE type non-ionic surface active agent better effects if, make electric dehydrator dehydration production process efficient height, the clean oil quality is good, production cost is low; AE type non-ionic surface active agent is that trade names are the crude oil demulsifier product of AE1910, this demulsifier product is that polyethylene polyamine is the demulsifier of initiator, preferred its polymerization degree n is 4, m is 85, k is 27, the preferred weight percentage composition is 50%, have dispersion, demulsification, effective with the composite back of SP type non-ionic surface active agent, make electric dehydrator dehydration production process efficient height, the clean oil quality is good, production cost is low; Succinate sodium sulfonate preferred weight percentage composition is 5%, has wetting action, the succinate sodium sulfonate can adsorb on the colloidal materials particle surface, the adsorption layer that formation aligns, reduce interfacial free energy, thereby change the wetting property of colloidal materials particle surface effectively,, the profit transition zone is played inhibitory action away from oil-water interfaces; The poly-making of polyoxyethylene used; The polyoxyethylene polyoxypropylene alkylphenol formaldehyde resin, preferably its degree of polymerization m is 13, k is 25, x is 330, the preferred weight percentage composition is 20%, effectively changes the wetability of colloidal materials particle, and the profit transition zone is played inhibitory action; Glacial acetic acid plays inhibitory action to the profit transition zone; Therefore this inhibitor has breakdown of emulsion, dispersion, wetting action, can effectively suppress inhibitor and produce transition zone at the electric dehydrator oil-water interfaces; Glacial acetic acid preferred weight percentage composition is 5%.
The contrast experiment:
Experiment effect of the present invention is that the crude oil that contains the colloidal materials particle with Daqing oil field is medium, measures this inhibitor to the demulsification performance of water-in-oil type crude oil emulsion with to profit transition zone inhibitory action; When action effect was measured, as comparing with reference to the contrast sample, TA1031 was the widely used a kind of crude oil demulsifier in domestic each oil field with TA1031 type crude oil demulsifier.
Under 45 ℃ of conditions of temperature, be that demulsifier joins respectively in the water-in-oil type crude oil emulsion that moisture content is 50% the Daqing oil field that contains the colloidal materials particle (adding dose is 50mg/l) with inhibitor of the present invention and TA1031, the dehydration bottle that the 100g crude oil emulsion is housed is placed in the water-bath dehydrating amount and profit transition zone amount when measuring 30min, and comparing result sees Table 1:
Table 1, contrast experiment's effect table
By contrast table as can be seen, inhibitor of the present invention is to the demulsification performance of the water-in-oil type crude oil emulsion of the Daqing oil field that contains the colloidal materials particle and obvious to the inhibitory action of profit transition zone, and is more effective than existing demulsifier.
Embodiment 1: at apricot bigeminy scene, grand celebration the 4th oil recovery factory, in electric dehydrator, use the inhibitor that such scheme 1 is mixed with, adopt subtotal amount dosing pump that former medicine is directly added electric dehydrator and come liquid pipe place, its addition is generally 5～50mg, it is moisture qualified to take off after-purification oil, and electric dehydrator operates steadily, electric dehydrator dehydration current 21A, re-injection water water quality is qualified, deviates from that sulfide content is 15.6mg/l in the water.
Embodiment 2: at apricot bigeminy scene, grand celebration the 4th oil recovery factory, in electric dehydrator, use the inhibitor that such scheme 2 is mixed with, adopt subtotal amount dosing pump that former medicine is directly added electric dehydrator and come liquid pipe place, its addition is generally 5～50mg, it is moisture qualified to take off after-purification oil, and electric dehydrator operates steadily, electric dehydrator dehydration current 18A, re-injection water water quality is qualified, deviates from that sulfide content is 6.4mg/l in the water.
Embodiment 3: at apricot bigeminy scene, grand celebration the 4th oil recovery factory, in electric dehydrator, use the inhibitor that such scheme 3 is mixed with, adopt subtotal amount dosing pump that former medicine is directly added electric dehydrator and come liquid pipe place, its addition is generally 5～50mg, it is moisture qualified to take off after-purification oil, and electric dehydrator operates steadily, electric dehydrator dehydration current 22A, re-injection water water quality is qualified, deviates from that sulfide content is 12.9mg/l in the water.
Owing to implement such scheme, can effectively suppress colloidal materials oil-water interfaces deposition in electric dehydrator and produce transition zone, guarantee electric dehydrator stable operation, can in dehydration of crude oil technology, promote the use of.
Claims (4)
1, a kind of inhibitor that prevents colloidal materials in electric dehydrator oil-water interfaces deposition, it is characterized in that: this inhibitor is five yuan of compounds, each composition and proportioning are as follows by weight percentage: SP type non-ionic surface active agent 1%～30%, AE type non-ionic surface active agent 40%～96%, succinate sodium sulfonate 1%～10%, polyoxyethylene polyoxypropylene alkylphenol formaldehyde resin 1%～40%, glacial acetic acid 1%～10%, wherein: the general formula of SP type non-ionic surface active agent is:
Degree of polymerization m in the formula
1Be 10～40, k
1Be 200～400, m
2Be 5～20, the general formula of AE type non-ionic surface active agent is:
A represents the block polymerization ether of expoxy propane oxirane in the formula, and its structural formula is:
Polymerization degree n is 4～9 in the formula, m is 10～100, k is 10～50, and the general formula of succinate sodium sulfonate is:
R in the formula
2Be the alkyl of carbon number 4～20, the general formula of polyoxyethylene polyoxypropylene alkylphenol formaldehyde resin is:
R is that alkyl, the m of carbon number 4～20 are 10～40 in the formula, n is 10～50, x is 200～400.
2, the inhibitor that prevents colloidal materials in electric dehydrator oil-water interfaces deposition according to claim 1, it is characterized in that: each composition and proportioning are as follows by weight percentage: SP type non-ionic surface active agent 20%, AE type non-ionic surface active agent 50%, succinate sodium sulfonate 5%, polyoxyethylene polyoxypropylene alkylphenol formaldehyde resin 20%, glacial acetic acid 5%.
3, a kind ofly prepare the method that prevents colloidal materials at the inhibitor of electric dehydrator oil-water interfaces depositions as claimed in claim 1, it is characterized in that: by weight SP type non-ionic surface active agent 1%～30%, AE type non-ionic surface active agent 40%～96%, succinate sodium sulfonate 1%～10%, polyoxyethylene polyoxypropylene alkylphenol formaldehyde resin 1%～40%, glacial acetic acid 1%～10% 5 kind of a mixing of materials are heated to 50～90 ℃, constant temperature stirred 2 hours, and discharging got the inhibitor of final products when temperature was reduced between 30～40 ℃.
4, preparation according to claim 3 prevents the method for colloidal materials at the inhibitor of electric dehydrator oil-water interfaces deposition, and it is characterized in that: five kinds of mixing of materials heating-up temperatures are 60 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN03142681.6A CN1226076C (en) | 2003-06-12 | 2003-06-12 | Depressor for colloidal state substance depositing on water-oil interface in electric dehydrator and method for preparing the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN03142681.6A CN1226076C (en) | 2003-06-12 | 2003-06-12 | Depressor for colloidal state substance depositing on water-oil interface in electric dehydrator and method for preparing the same |
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| Publication Number | Publication Date |
|---|---|
| CN1485410A CN1485410A (en) | 2004-03-31 |
| CN1226076C true CN1226076C (en) | 2005-11-09 |
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| CN03142681.6A Expired - Lifetime CN1226076C (en) | 2003-06-12 | 2003-06-12 | Depressor for colloidal state substance depositing on water-oil interface in electric dehydrator and method for preparing the same |
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