CN102453116B - Redox initiator system, acrylamide polymer and preparation method and application of acrylamide polymer - Google Patents
Redox initiator system, acrylamide polymer and preparation method and application of acrylamide polymer Download PDFInfo
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- CN102453116B CN102453116B CN201010526266.1A CN201010526266A CN102453116B CN 102453116 B CN102453116 B CN 102453116B CN 201010526266 A CN201010526266 A CN 201010526266A CN 102453116 B CN102453116 B CN 102453116B
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Abstract
The invention provides a redox initiator system which comprises persulfates and sulfites. The redox initiator system also comprises compounds shown in the formula I, wherein in the formula I, R is one of H, linear or branched alkyl with carbon atom number being 1-5, amino-alkyl with carbon atom number being 1-5 and NH2. The invention also provides an acrylamide polymer and a preparation method and application thereof. The initial initiation temperature of the redox initiator system provided by the invention is low, and the acrylamide polymer which has high molecular weight and has high apparent viscosity in a solution can be obtained.
Description
Technical field
The present invention relates to a kind of redox initiator system and acrylamide polymer and its preparation method and application.More specifically, the present invention relates to a kind of redox radical polymerization initiator system, use the preparation method of the acrylamide polymer of this redox free radical polyalcohol initiator system, the acrylamide polymer of being prepared by the method and application thereof.
Background technology
In recent years, along with the increasing of oilfield exploitation difficulty, the polymer oil-displacing agent that the polyacrylamide solution of take is representative has excellent performance in the tertiary oil recovery of oil field one class, two class oil reservoirs, for vital role has been brought into play in oilfield stable production, volume increase.Along with the minimizing gradually of a class, two class oil reservoir workable reserve, three class oil reservoirs (refer to that temperature is that 80-95 ℃ and salinity are 1 * 10
4the oil reservoir of mg/L) exploitation is imperative, but its harsh geologic condition to POLYACRYLAMIDE FLOODING agent the tolerance under high temperature, high salt have higher requirement.Industrial application has promoted the research and development upsurge of polyacrylamide, and wherein improving the molecular weight of polyacrylamide the temperature resistant antisalt performance of Reinforced Polypropylene acid amides is the main direction of studying at present.
Polymerization of aqueous solution of acrylamide has three large features: (1) speed of response is fast; (2) thermal discharge is large; And the product gel poor thermal conductivity of (3) formation.In practical application in industry, adopt autoclave aqueous solution polymerization to produce polyacrylamide more.The equipment of autoclave polymerization technique is simple, and less investment is the first-selection that current domestic enterprise produces anion-polyacrylamide.Because industrial autoclave polymerization scale is large, in the process of polymerization, do not take again cooling provision, the boundary member proportion of polymkeric substance is very little, can regard " adiabatic polymerisation " as, and the temperature in system significantly raises with the carrying out of polyreaction.Yet generally speaking, in Raolical polymerizable, temperature directly affects speed of response and quality product, temperature is higher, and polymerization rate is faster, and the molecular weight of the polymkeric substance obtaining is lower.Therefore,, in the autoclave polyreaction of acrylamide, one of the key that improves the molecular weight of polyacrylamide is to select the low and active high initiator system of initial kick off temperature.Yet, the polymerization of using existing initiator system to carry out acrylamide is difficult to obtain has the more polyacrylamide of high molecular, the more important thing is, though the polymerization of using existing initiator system to carry out acrylamide can not obtain at high temperature and the water of high salinity in still there is the polyacrylamide of high apparent viscosity.
Therefore, feature for polyacrylamide industrialized autoclave polymerization, the low initiator system of initial kick off temperature of development of new, when guaranteeing high monomer transformation efficiency, make in system most of reaction carry out gently in low temperature range, thus obtain high molecular more, at high temperature and the polyacrylamide still in the water of high salinity with high apparent viscosity be a technical problem urgently to be resolved hurrily.
Summary of the invention
The object of the invention is to overcome very difficult acquisition of polymerization of using existing redox initiation system to carry out acrylamide and there is higher molecular weight, at high temperature and in the water of high salinity, still there is the deficiency of the acrylamide polymer of high apparent viscosity, a kind of redox initiator system and acrylamide polymer and preparation method thereof and the application in polymer oil-displacing agent are provided, use this redox initiator system to carry out the acrylamide polymer that polymerization not only can obtain having higher molecular weight, and this acrylamide polymer at high temperature, in the water of high salinity, there is high apparent viscosity.
The invention provides a kind of redox initiator system, this redox initiator system contains persulphate and sulphite, and wherein, described redox initiator system also contains the compound shown in formula I,
In formula I, R is H, the carbonatoms straight or branched alkyl that is 1-5, aminoalkyl group and the NH that carbonatoms is 1-5
2in a kind of.
The present invention also provides a kind of preparation method of acrylamide polymer, the method is included under the existence of initiator and mineral alkali, acrylamide and temperature resistant antisalt monomer are carried out to polymerization in water, and wherein, described initiator contains redox initiator system provided by the invention.
The present invention also further provides a kind of acrylamide polymer, and this acrylamide polymer is prepared by method provided by the invention.
The present invention also further provides the application of aforesaid propylene amide polymer in polymer oil-displacing agent.
High and initial kick off temperature is low according to the activity of redox initiator system of the present invention, the polyreaction of can be between 0-20 ℃ acrylamide triggered and temperature resistant antisalt monomer, stable polymerization reaction is carried out, thereby be suitable for preparing and thering is the more acrylamide polymer of high molecular by autoclave polymerization.And composition that can also be by changing initiator system according to redox initiator system of the present invention is to regulating and controlling the inductive phase of polymerization system.
Adopt not only can obtaining and there is the more acrylamide polymer of high molecular according to the preparation method of acrylamide polymer of the present invention of redox initiator system provided by the invention, and the acrylamide polymer obtaining at high temperature, still have high apparent viscosity in the aqueous solution of high salinity, in concentration, be that the aqueous solution of 1500 mg/litre and the salinity acrylamide polymer that is 10000mg/L can reach 20.4-28.3mPas the apparent viscosity of 95 ℃.
And, acrylamide polymer according to the present invention has excellent temperature resistant antisalt performance, concentration is that the aqueous solution of 1500 mg/litre and the salinity acrylamide polymer that is 10000mg/L carries out the weathering test of 1 month in the oxygen-free environment of 95 ℃, apparent viscosity conservation rate is more than 90%, carry out the weathering test of 3 months, apparent viscosity conservation rate is more than 80%.
Accompanying drawing explanation
Fig. 1 is the temperature variant curve comparison figure of apparent viscosity of the aqueous solution (concentration is 1500mg/L, and salinity is 10000mg/L) of the acrylamide polymer of the product of embodiment 1 and embodiment 6 preparations and trade mark FP934PH, the FP6030 of French SNF company production and FP3640.
Embodiment
The invention provides a kind of redox initiator system, this redox initiator system contains persulphate and sulphite, and wherein, described redox initiator system also contains the compound shown in formula I,
In formula I, R is H, the carbonatoms straight or branched alkyl that is 1-5, aminoalkyl group and the NH that carbonatoms is 1-5
2in a kind of.
Redox initiation system according to the present invention contains the compound based on piperidines shown in formula I, this compound not only can be used as reductive agent in redox initiator system and participates in initiated polymerization, can also participate in polyreaction as chain extension agent, promote the chainpropagation in acrylamide polymerization reaction.
In formula I, R can be H, the carbonatoms straight or branched alkyl that is 1-5, aminoalkyl group and the NH that carbonatoms is 1-5
2in a kind of.In the present invention, what the straight or branched alkyl that carbonatoms is 1-5 can be in methyl, ethyl, n-propyl, sec.-propyl, normal-butyl, sec-butyl, isobutyl-, the tertiary butyl, n-pentyl, isopentyl, tert-pentyl and neo-pentyl is a kind of.In the present invention, the amino in the aminoalkyl group that carbonatoms is 1-5 can be that primary amino, secondary amino group or uncle are amino, is specifically as follows: CH
2nH
2, CH
2cH
2nH
2, CH
2cH
2cH
2nH
2, CH
2cH (CH
3) NH
2, C (CH
3)
2nH
2, CH
2cH
2cH
2cH
2nH
2, CH (CH
3) CH
2cH
2nH
2, CH
2cH (CH
3) CH
2nH
2, CH
2cH
2cH (CH
3) NH
2, CH
2cH
2cH
2cH
2cH
2nH
2, CH
2cH
2cH
2cH (CH
3) NH
2, CH
2cH
2cH (CH
3) CH
2nH
2, CH
2cH (CH
3) CH
2cH
2nH
2, CH (CH
3) CH
2cH
2cH
2nH
2, C (CH
3)
2cH
2cH
2nH
2, CH
2nHCH
3, CH
2cH
2nHCH
3, CH (CH
3) NHCH
3, CH
2cH
2cH
2nHCH
3, CH (CH
3) CH
2nHCH
3, CH
2cH (CH
3) NHCH
3, CH
2cH
2cH
2cH
2nHCH
3, CH (CH
3) CH
2cH
2nHCH
3, CH
2cH (CH
3) CH
2nHCH
3, CH
2cH
2cH (CH
3) NHCH
3, C (CH
3)
2cH
2nHCH
3, CH
2c (CH
2)
2nHCH
3, CH
2cH
2nHCH
2cH
3, CH
2cH
2nHCH
2cH
2cH
3, CH
2cH
2cH
2nHCH
2cH
3, CH (CH
3) CH
2nHCH
2cH
3, CH
2cH (CH
3) NHCH
2cH
3, CH
2n (CH
3)
2, CH
2cH
2n (CH
3)
2, CH
2cH
2cH
2n (CH
3)
2, CH (CH
3) CH
2n (CH
3)
2, CH
2cH (CH
3) N (CH
3)
2and C (CH
3)
2n (CH
3)
2in a kind of.
Under preferable case, in formula I, R is H, CH
3, C
2h
5, NH
2, (CH
2)
2nH
2(CH
2)
2nH
2in a kind of.
Under preferable case, the compound shown in formula I is
In the present invention, the compound shown in formula I can be commercially available, and also can adopt the known method in organic synthesis field synthetic.
The present invention is by obtain the low and active high redox initiator system of initial kick off temperature with the compound shown in formula I in redox initiator system, thereby therefore preparation high molecular and have the acrylamide polymer of high apparent viscosity in solution can be this area conventional various water-soluble sulfites and persulphate according to sulphite in redox initiator system of the present invention and persulphate.
Preferably, described sulphite is one or more in ammonium sulphite, potassium sulfite, S-WAT, ammonium bisulfite, Potassium hydrogen sulfite and sodium bisulfite.More preferably, described sulphite is one or more in ammonium sulphite, potassium sulfite and sodium bisulfite.Most preferably, described sulphite is sodium bisulfite.
Preferably, described persulphate is one or more in ammonium persulphate, Sodium Persulfate and Potassium Persulphate.More preferably, described persulphate is ammonium persulphate and/or Potassium Persulphate.Most preferably, described persulphate is ammonium persulphate.
The present inventor finds in research process, and the sulphite in redox initiator system is sodium bisulfite, and persulphate is ammonium persulphate, and the compound shown in formula I is
According to redox initiator system of the present invention, the content of the compound shown in described persulphate, sulphite and formula I can carry out appropriate selection according to concrete service requirements.Preferably, in described redox initiator system, the content of described persulphate is 4-85 % by weight, and the weight ratio of the compound shown in described persulphate, sulphite and formula I is 1: 0.1-10: 0.1-10.When the content of the compound shown in described persulphate, sulphite and formula I is within above-mentioned scope, low and active high according to the initial kick off temperature of redox initiator system of the present invention, and adopt polymerization that redox initiator system according to the present invention is carried out acrylamide to obtain to have more high molecular and in solution, there is high apparent viscosity and the acrylamide polymer of apparent viscosity conservation rate.More preferably, in described redox initiator system, the content of described persulphate is 12-72 % by weight, and the weight ratio of the compound shown in described persulphate, sulphite and formula I is 1: 0.2-2: 0.2-5.Further preferably, in described redox initiator system, the content of described persulphate is 25-56 % by weight, and the weight ratio of the compound shown in described persulphate, sulphite and formula I is 1: 0.4-1: 0.4-2.
According to each component in redox initiator system of the present invention, separately deposit before use, add in reaction system separately or jointly in use.
The present invention also provides a kind of preparation method of acrylamide polymer, the method is included under the existence of initiator and mineral alkali, acrylamide and temperature resistant antisalt monomer are carried out to polymerization in water, and wherein, described initiator contains redox initiator system provided by the invention.
Acrylamide polymer in the present invention refers to by acrylamide is reacted under condition of copolymer to the polymkeric substance obtaining with temperature resistant antisalt monomer, comprises the structural unit being formed by acrylamide and the structural unit being formed by temperature resistant antisalt monomer.
According to the preparation method of acrylamide polymer of the present invention, adopt redox initiator system provided by the invention, can carry out polyreaction with low initial kick off temperature, thereby can prevent well that the local temperature causing due to polymerization exotherm from raising, stable polymerization reaction is carried out, and then can access high molecular, in solution, there is high apparent viscosity and at high temperature there is the acrylamide polymer of high apparent viscosity conservation rate.
According to the preparation method of acrylamide polymer of the present invention, under the existence of initiator and mineral alkali, the method for acrylamide and temperature resistant antisalt monomer being carried out in water to polymerization can be the ordinary method of this area.Under preferable case; under the existence of initiator and mineral alkali; the method of acrylamide and temperature resistant antisalt monomer being carried out in water to polymerization comprises: by compound and mineral alkali shown in formula I and contain described acrylamide and the aqueous solution of temperature resistant antisalt monomer; under protection of inert gas, after being mixed with the mixture obtaining, described sulphite and persulphate carry out polymerization.
Because the present invention contains the compound shown in formula I by use to make to realize object of the present invention at the lower initial polymerization reaction temperature of being aggregated in of acrylamide and temperature resistant antisalt monomer, therefore according to the preparation method of acrylamide polymer of the present invention, for the consumption of described redox-catalyst system, being not particularly limited, can be the conventional amount used of this area.Under preferable case, the 100 weight part acrylamides of take are benchmark, and the consumption of the persulphate in described redox initiator system is 0.001-0.1 weight part.More preferably, the 100 weight part acrylamides of take are benchmark, and the consumption of the persulphate in described redox initiator system is 0.001-0.03 weight part.Further preferably, the 100 weight part acrylamides of take are benchmark, and the consumption of the persulphate in described redox initiator system is 0.004-0.025 weight part.
Adopt redox initiator system provided by the invention, according to aforesaid method, acrylamide and temperature resistant antisalt monomer are carried out to polymerization in water, can give full play to the feature of redox initiator system of the present invention, and then obtain and to there is high molecular weight, in solution, there is high apparent viscosity and at high temperature to there is the acrylamide polymer of high apparent viscosity conservation rate.
More preferably, according to the initiator in the preparation method of acrylamide polymer of the present invention, also contain water-soluble azo series initiators.The decomposition temperature of azo series initiators is generally 40-60 ℃, because the polyreaction of acrylamide polymer is a thermopositive reaction, and in industrialized autoclave polyreaction, conventionally do not take cooling provision, so the temperature of the polymerization system of acrylamide polymer is by carrying out and raise gradually with polyreaction.According to the present inventor's research, with regard to redox initiator system provided by the invention, the temperature of acrylamide polymerization system generally can reach 60 ℃ of left and right, therefore azo series initiators is combined with redox initiator system of the present invention, can bring into play the low feature of initial kick off temperature of redox initiator system of the present invention on the one hand, with lesser temps, carry out initiated polymerization, azo is that initiator system can produce the polymerization that free radical causes unreacted monomer in polymerization reaction late stage on the other hand, thereby further improve the transformation efficiency of monomer.
According to the present invention, described water-soluble azo series initiators can be the various water-soluble azo based compounds that are suitable for use as radical polymerization initiator.Under preferable case, described water-soluble azo series initiators is 2,2 '-azo (2-amidine propane) dihydrochloride, 2,2 '-azo (2-tetrahydroglyoxaline propane) dihydrochloride and 4, one or more in 4 '-azo two (4-cyanopentanoic acid).
When described initiator also contains water-soluble azo series initiators, the amount of described water-soluble azo series initiators can be carried out appropriate selection according to concrete application scenario, can make monomer conversion meet the demands, is as the criterion.Under preferable case, the 100 weight part acrylamides of take are benchmark, and the amount of described water-soluble azo series initiators is preferably 0.0005-0.05 weight part.When the amount of described water-soluble azo series initiators is within above-mentioned scope, can obtain gratifying transformation efficiency.More preferably, the 100 weight part acrylamides of take are benchmark, and the amount of described water-soluble azo series initiators is preferably 0.001-0.01 weight part.More preferably, the 100 weight part acrylamides of take are benchmark, and the amount of described water-soluble azo series initiators is preferably 0.001-0.0025 weight part.
When described initiator also contains water-soluble azo series initiators; under the existence of initiator and mineral alkali; the method of acrylamide and temperature resistant antisalt monomer being carried out in the aqueous solution to polymerization comprises: by the compound shown in formula I, mineral alkali and water-soluble azo series initiators and the aqueous solution that contains described acrylamide and temperature resistant antisalt monomer; under protection of inert gas, after being mixed with the mixture obtaining, described sulphite and persulphate carry out polymerization.
According to the preparation method of acrylamide polymer of the present invention, comprise acrylamide and temperature resistant antisalt monomer are carried out to polymerization under initiator exists in water.Acrylamide and temperature resistant antisalt monomer are carried out to the temperature resistant antisalt that polymerization can significantly improve the acrylamide polymer obtaining.Described temperature resistant antisalt monomer can be given the monomer of acrylamide polymer with temperature resistant antisalt for various, and described temperature resistant antisalt monomer also should have good Copolymerization activity in addition.
The present inventor finds in research process, at described temperature resistant antisalt monomer, be 2-acrylamide-2-methylpro panesulfonic acid, NVP and N, during one or more in N-DMAA, can obtain the acrylamide polymer that temperature resistant antisalt performance significantly improves.More preferably, described temperature resistant antisalt monomer is 2-acrylamide-2-methylpro panesulfonic acid.
According to the present invention, the amount of described heatproof antioxygen monomer can be carried out appropriate selection according to the kind of selected temperature resistant antisalt monomer.Under preferable case, the 100 weight part acrylamides of take are benchmark, and the amount of described temperature resistant antisalt monomer is 5-400 weight part.When the amount of described temperature resistant antisalt monomer is within above-mentioned scope, can obtain the acrylamide polymer with good temperature resistant antisalt performance.Guaranteeing under the prerequisite of temperature resistant antisalt performance, consumption from further reduction temperature resistant antisalt monomer, and then the angle of cost that further reduces the preparation method of acrylamide polymer of the present invention is set out, the 100 weight part acrylamide monomers of take are benchmark, and the consumption of described temperature resistant antisalt monomer is 10-300 weight part.
According to the preparation method of acrylamide polymer of the present invention, be included under the existence of initiator and mineral alkali, acrylamide and temperature resistant antisalt monomer are carried out to polymerization.Described mineral alkali is for regulating the pH value of polymerization system.Described mineral alkali can be the conventional various basic cpds that can realize above-mentioned purpose in this area.Under preferable case, described mineral alkali is one or more in sodium hydroxide, potassium hydroxide and sodium carbonate.The consumption of described mineral alkali can carry out appropriate selection according to the composition of polymerization system, so that the pH value of polymerization system meets service requirements, is as the criterion.
The present inventor finds in research process, take acrylamide described in 100 weight parts, it is benchmark, the amount of described mineral alkali is preferably 0.05-80 weight part, like this can be so that within the scope of the pH value of polymerization system in 4-10, thus can make polyreaction to carry out more stably.From the angle of the stability of further polyreaction, the 100 weight part acrylamides of take are benchmark, and the amount of described mineral alkali is 0.1-30 weight part more preferably, so that the scope of the pH value of polymerization system in 5-9.
According to the preparation method of acrylamide polymer of the present invention, being aggregated in water of described acrylamide and temperature resistant antisalt monomer carried out.According to the preparation method of acrylamide polymer of the present invention, for the amount of water, being not particularly limited, can be the conventional amount used of this area.Under preferable case, the 100 weight part acrylamides of take are benchmark, and the amount of water is 200-4000 weight part.When the amount of water is within above-mentioned scope, can further avoid local superheating, thereby it is too fast to be easier to prevent that polymerization system from heating up.More preferably, the 100 weight part acrylamides of take are benchmark, and the amount of water is 200-900 weight part.
According to the preparation method of acrylamide polymer of the present invention, owing to having adopted according to redox initiator system of the present invention, thereby can at lower temperature, carry out polymerization by trigger monomer.Usually, according to the preparation method's of acrylamide polymer of the present invention polymerization initiation temperature, can be 0-20 ℃.More preferably, according to the preparation method's of acrylamide polymer of the present invention polymerization initiation temperature, be 0-10 ℃.
According to the preparation method of acrylamide polymer of the present invention, the time of described polymerization can be carried out appropriate selection according to the monomer conversion of the kind of the temperature resistant antisalt monomer of described use and consumption and expection.Under preferable case, the time of described polymerization is 3-10 hour.More preferably, the time of described polymerization is 4-6 hour.
According in the preparation method of acrylamide polymer of the present invention, being aggregated under protection of inert gas of acrylamide and temperature resistant antisalt monomer carried out.In the present invention, described rare gas element refers to the gas that can not participate in polyreaction, for example: one or more in nitrogen and the periodic table of elements in neutral element gas, neutral element gas argon gas for example in the described periodic table of elements.
According to the preparation method of acrylamide polymer of the present invention, can also comprise that the product that polymerization is obtained carries out slaking at 50-80 ℃.At 50-80 ℃, carry out slaking and can further optimize the performance of acrylamide polymer of the present invention.Preferably at 60 ℃, carry out described slaking.The time of described slaking is preferably 2-5 hour, more preferably 3 hours.
According to the preparation method of acrylamide polymer of the present invention can also comprise by the product granulation after the product after polymerization or slaking, dry, pulverize and screening, thereby obtain the acrylamide polymer product of powdery.Described granulation, condition dry, that pulverize and sieve are well known to a person skilled in the art.For example: the product after the product after polymerization or slaking can be carried out in tablets press to granulation; and by the pellet obtaining dry 1-6 hour at the temperature of 50-90 ℃; then dry pellet is pulverized at pulverizer; and be the screen cloth of 15-100 micron by sieve diameter, thereby obtain the acrylamide polymer product of powdery.
Of the present invention a kind of preferred embodiment in, the preparation method of described acrylamide polymer comprises the following steps of carrying out successively:
(1) 100 weight part acrylamides, 10-300 weight part temperature resistant antisalt monomer are joined in reactor, add 200-4000 weight parts water to dissolve;
(2) in aforesaid reaction vessel, add 0.1-30 weight part mineral alkali, add 0.0005-0.05 weight parts water dissolubility azo-initiator, the compound shown in 0.001-1 weight part formula I, the pH value of regulation system is 4-10 (being preferably 5-9);
(3) controlling reacting liquid temperature is 0-20 ℃ (being preferably 0-10 ℃), and passes into nitrogen in aforesaid reaction vessel, and deoxygenation is more than 30 minutes;
(4) in aforesaid reaction vessel, add 0.0004-1 weight part sulphite and 0.001-0.1 weight part persulphate, carry out polyreaction, polymerization reaction time is 3-10 hour (being preferably 4-6 hour), obtains gelatin polymer product;
(5) temperature in aforesaid reaction vessel is raised to 50-80 ℃, slaking 3-5 hour (preferably 3 hours); And
(6) product after slaking taken out from reactor and carry out granulation, be dried, pulverize and sieve, thereby obtaining granular acrylamide polymer product.
The present invention also further provides a kind of acrylamide polymer, and this acrylamide polymer is to prepare by method provided by the invention.
Acrylamide polymer according to the present invention has adopted redox initiator system of the present invention in polymerization process, acrylamide and temperature resistant antisalt monomer are carried out to polymerization, can carry out polymerization with low initial polymerization reaction temperature, and stable polymerization reaction, thereby the molecular weight of the acrylamide polymer obtaining and the apparent viscosity in solution and apparent viscosity conservation rate all higher, and there is excellent temperature resistant antisalt performance.Wherein, according to the viscosity-average molecular weight of acrylamide polymer of the present invention, can reach more than 1,000 ten thousand, concentration is that the aqueous solution of 1500 mg/litre and the salinity acrylamide polymer that is 10000mg/L is 20-30mPas the apparent viscosity of 95 ℃.Acrylamide polymer according to the present invention has excellent temperature resistant antisalt performance, concentration is that the aqueous solution of 1500 mg/litre and the salinity acrylamide polymer that is 10000mg/L carries out the weathering test of 1 month in the oxygen-free environment of 95 ℃, apparent viscosity conservation rate is more than 90%, carry out the weathering test of 3 months, apparent viscosity conservation rate is more than 80%.As can be seen here, acrylamide polymer according to the present invention has high molecular weight, in solution, there is high apparent viscosity and apparent viscosity conservation rate, and there is excellent temperature resistant antisalt performance, be particularly useful for making polymer oil-displacing agent, be specially adapted to three class oil reservoirs and (refer to that temperature is that 80-95 ℃ and salinity are 3 * 10
4the oil reservoir of mg/L) Flooding Agent for EOR.
Below with reference to embodiment, describe the present invention in detail.
In following examples, according to the method for stipulating in GB12005.1-89, measure the intrinsic viscosity of acrylamide polymer; According to the method for stipulating in GB12005.10-92, adopt formula M=([η]/K)
1/ αcalculate the viscosity-average molecular weight of acrylamide polymer, wherein, K=4.75 * 10
-3, α=0.80, [η] is intrinsic viscosity.
In following examples, the testing method of the viscosity conservation rate of the acrylamide polymer aqueous solution comprises: the concentration by acrylamide polymer with 1500mg/L is dissolved in the salt solution of salinity 10000mg/L, solution deoxygenation to oxygen level is less than to 1mg/L, by the aqueous solution obtaining at 95 ℃ of temperature, aging 1 month or after 3 months, by the apparent viscosity of 25 ℃ of the above-mentioned aqueous solution of Brookfield viscometer determining, with following formula, calculate apparent viscosity conservation rate:
Apparent viscosity * 100% of the apparent viscosity/aging front acrylamide polymer aqueous solution of the acrylamide polymer aqueous solution after apparent viscosity conservation rate=aging.
In following examples; on the tablets press that to be purchased from the triumphant model that reaches bulk material equipment company limited of Beijing victory be SLG (J)-120, carry out granulation; on the pulverizer that to be purchased from the triumphant model that reaches bulk material equipment company limited of Beijing victory be DGF, pulverize; the pellet that granulation is obtained is dried at the temperature of 70 ℃, by the acrylamide polymer product after pulverizing, is the screen cloth of 15-100 micron by sieve diameter.
In following examples, 2-acrylamide-2-methylpro panesulfonic acid is purchased from Sam Wing International Ltd., 2,2 '-azo (2-amidine propane) dihydrochloride is purchased the company from Aldrich, NVP is purchased from Jiaozhuo Zhong Wei Chemical Co., Ltd., N,N-DMAA is purchased from Beijing Rui Bolong petroleum science and technology Development Co., Ltd.
Embodiment 1
The present embodiment is used for explanation according to redox initiator system of the present invention and acrylamide polymer and preparation method thereof.
23.75 kilograms of acrylamides and 26.25 kilograms of 2-acrylamide-2-methylpro panesulfonic acids are put into the polymerization reaction kettle with surface thermocouple, add 128.35 kilograms of deionized waters, stir down to dissolving completely.Slowly adding mass concentration is 20 kilograms of 25% sodium hydroxide solutions, add mass concentration be 0.05% 2,1.0 kilograms of 2 '-azo (2-amidine propane) dihydrochloride aqueous solution, compound PD-1 (concrete structure is in Table 1) shown in 5 grams of formula I, the pH value of system is 7.0, after letting nitrogen in and deoxidizing 30 minutes, reacting liquid temperature is reduced to 4 ℃.Adding mass concentration is 5.0 kilograms of 0.05% sodium sulfite solution, mass concentration is 5.0 kilograms of 0.1% ammonium persulfate aqueous solutions, 15 minutes rear surface thermopairs show that polymerization system starts to heat up, start timing, polyreaction was carried out after 6 hours, temperature in the kettle is raised to 60 ℃, slaking 3 hours, obtain gum polymers product, through granulation, dry, pulverize, screening obtains acrylamide polymer.The limiting viscosity of the acrylamide polymer obtaining, viscosity-average molecular weight, is that apparent viscosity and apparent viscosity conservation rate in the salt solution of 95 ℃ and when concentration is 1500mg/L is as shown in table 2 in salinity 10000mg/L, temperature.
Embodiment 2
The present embodiment is used for explanation according to redox initiator system of the present invention and acrylamide polymer and preparation method thereof.
23.75 kilograms of acrylamides and 26.25 kilograms of 2-acrylamide-2-methylpro panesulfonic acids are put into the polymerization reaction kettle with surface thermocouple, add 128.35 kilograms of deionized waters, stir down to dissolving completely.Slowly adding mass concentration is 20 kilograms of 25% sodium hydroxide solutions, add mass concentration be 0.05% 2,1.0 kilograms of 2 '-azo (2-amidine propane) dihydrochloride aqueous solution, compound PD-2 (concrete structure is in Table 1) shown in 5 grams of formula I, the pH value of system is 7.0, after letting nitrogen in and deoxidizing 30 minutes, reacting liquid temperature is reduced to 4 ℃.Adding mass concentration is 5.0 kilograms of 0.05% sodium sulfite solution, mass concentration is 5.0 kilograms of 0.1% ammonium persulfate aqueous solutions, 8 minutes rear surface thermopairs show that polymerization system starts to heat up, start timing, polyreaction was carried out after 6 hours, temperature in the kettle is raised to 60 ℃, slaking 3 hours, obtain gum polymers product, through granulation, dry, pulverize, screening obtains acrylamide polymer.The limiting viscosity of the acrylamide polymer obtaining, viscosity-average molecular weight, is that apparent viscosity and apparent viscosity conservation rate in the salt solution of 95 ℃ and when concentration is 1500mg/L is as shown in table 2 in salinity 10000mg/L, temperature.
Embodiment 3
The present embodiment is used for explanation according to redox initiator system of the present invention and acrylamide polymer and preparation method thereof.
23.75 kilograms of acrylamides and 26.25 kilograms of 2-acrylamide-2-methylpro panesulfonic acids are put into the polymerization reaction kettle with surface thermocouple, add 128.35 kilograms of deionized waters, stir down to dissolving completely.Slowly adding mass concentration is 20 kilograms of 25% sodium hydroxide solutions, add mass concentration be 0.05% 2,1.0 kilograms of 2 '-azo (2-amidine propane) dihydrochloride aqueous solution, compound PD-3 (concrete structure is in Table 1) shown in 5 grams of formula I, the pH value of system is 7.0, after letting nitrogen in and deoxidizing 12 minutes, reacting liquid temperature is reduced to 4 ℃.Adding mass concentration is 5.0 kilograms of 0.05% sodium sulfite solution, mass concentration is 5.0 kilograms of 0.1% ammonium persulfate aqueous solutions, 10 minutes rear surface thermopairs show that polymerization system starts to heat up, start timing, polyreaction was carried out after 6 hours, temperature in the kettle is raised to 60 ℃, slaking 3 hours, obtain gum polymers product, through granulation, dry, pulverize, screening obtains acrylamide polymer.The limiting viscosity of the acrylamide polymer obtaining, viscosity-average molecular weight, is that apparent viscosity and apparent viscosity conservation rate in the salt solution of 95 ℃ and when concentration is 1500mg/L is as shown in table 2 in salinity 10000mg/L, temperature.
Embodiment 4
The present embodiment is used for explanation according to redox initiator system of the present invention and acrylamide polymer and preparation method thereof.
23.75 kilograms of acrylamides and 26.25 kilograms of 2-acrylamide-2-methylpro panesulfonic acids are put into the polymerization reaction kettle with surface thermocouple, add 128.35 kilograms of deionized waters, stir down to dissolving completely.Slowly adding mass concentration is 20 kilograms of 25% sodium hydroxide solutions, add mass concentration be 0.05% 2,1.0 kilograms of 2 '-azo (2-amidine propane) dihydrochloride aqueous solution, compound PD-4 (concrete structure is in Table 1) shown in 5 grams of formula I, the pH value of system is 7.0, after letting nitrogen in and deoxidizing 30 minutes, reacting liquid temperature is reduced to 4 ℃.Adding mass concentration is 5.0 kilograms of 0.05% sodium sulfite solution, mass concentration is 5.0 kilograms of 0.1% ammonium persulfate aqueous solutions, 25 minutes rear surface thermopairs show that polymerization system starts to heat up, start timing, polyreaction was carried out after 6 hours, temperature in the kettle is raised to 60 ℃, slaking 3 hours, obtain gum polymers product, through granulation, dry, pulverize, screening obtains acrylamide polymer.The limiting viscosity of the acrylamide polymer obtaining, viscosity-average molecular weight, is that apparent viscosity and apparent viscosity conservation rate in the salt solution of 95 ℃ and when concentration is 1500mg/L is as shown in table 2 in salinity 10000mg/L, temperature.
The present embodiment is used for explanation according to redox initiator system of the present invention and acrylamide polymer and preparation method thereof.
23.75 kilograms of acrylamides and 26.25 kilograms of 2-acrylamide-2-methylpro panesulfonic acids are put into the polymerization reaction kettle with surface thermocouple, add 128.35 kilograms of deionized waters, stir down to dissolving completely.Slowly adding mass concentration is 20 kilograms of 25% sodium hydroxide solutions, add mass concentration be 0.05% 2,1.0 kilograms of 2 '-azo (2-amidine propane) dihydrochloride aqueous solution, compound PD-5 (concrete structure is in Table 1) shown in 5 grams of formula I, the pH value of system is 7.0, after letting nitrogen in and deoxidizing 30 minutes, reacting liquid temperature is reduced to 4 ℃.Adding mass concentration is 5.0 kilograms of 0.05% sodium sulfite solution, mass concentration is 5.0 kilograms of 0.1% ammonium persulfate aqueous solutions, 30 minutes rear surface thermopairs show that polymerization system starts to heat up, start timing, polyreaction was carried out after 6 hours, temperature in the kettle is raised to 60 ℃, slaking 3 hours, obtain gum polymers product, through granulation, dry, pulverize, screening obtains acrylamide polymer.The limiting viscosity of the acrylamide polymer obtaining, viscosity-average molecular weight, is that apparent viscosity and apparent viscosity conservation rate in the salt solution of 95 ℃ and when concentration is 1500mg/L is as shown in table 2 in salinity 10000mg/L, temperature.
Embodiment 6
The present embodiment is used for explanation according to redox initiator system of the present invention and acrylamide polymer and preparation method thereof.
23.75 kilograms of acrylamides and 26.25 kilograms of 2-acrylamide-2-methylpro panesulfonic acids are put into the polymerization reaction kettle with surface thermocouple, add 128.35 kilograms of deionized waters, stir down to dissolving completely.Slowly adding mass concentration is 53 kilograms of 25% aqueous sodium carbonates, add mass concentration be 0.05% 2,1.0 kilograms of 2 '-azo (2-amidine propane) dihydrochloride aqueous solution, compound PD-6 (concrete structure is in Table 1) shown in 5 grams of formula I, the pH value of system is 7.0, after letting nitrogen in and deoxidizing 30 minutes, reacting liquid temperature is reduced to 4 ℃.Adding mass concentration is 5.0 kilograms of 0.05% sodium sulfite solution, mass concentration is 5.0 kilograms of 0.1% ammonium persulfate aqueous solutions, 5 minutes rear surface thermopairs show that polymerization system starts to heat up, start timing, polyreaction was carried out after 6 hours, temperature in the kettle is raised to 60 ℃, slaking 3 hours, obtain gum polymers product, through granulation, dry, pulverize, screening obtains acrylamide polymer.The limiting viscosity of the acrylamide polymer obtaining, viscosity-average molecular weight, is that apparent viscosity and apparent viscosity conservation rate in the salt solution of 95 ℃ and when concentration is 1500mg/L is as shown in table 2 in salinity 10000mg/L, temperature.
Embodiment 7
The present embodiment is used for explanation according to redox initiator system of the present invention and acrylamide polymer and preparation method thereof.
23.75 kilograms of acrylamides and 2.375 kilograms of 2-acrylamide-2-methylpro panesulfonic acids are put into the polymerization reaction kettle with surface thermocouple, add 47.55 kilograms of deionized waters, stir down to dissolving completely.Slowly adding mass concentration is 1.81 kilograms of 25% sodium hydroxide solutions, add mass concentration be 0.05% 2,0.66 kilogram of 2 '-azo (2-amidine propane) dihydrochloride aqueous solution, compound PD-2 (concrete structure is in Table 1) shown in 5 grams of formula I, the pH value of system is 7.0, after letting nitrogen in and deoxidizing 30 minutes, reacting liquid temperature is reduced to 4 ℃.Adding mass concentration is 3.0 kilograms of 0.05% sodium sulfite solution, mass concentration is 3.0 kilograms of 0.1% ammonium persulfate aqueous solutions, 5 minutes rear surface thermopairs show that polymerization system starts to heat up, start timing, polyreaction was carried out after 6 hours, temperature in the kettle is raised to 60 ℃, slaking 3 hours, obtain gum polymers product, through granulation, dry, pulverize, screening obtains acrylamide polymer.The limiting viscosity of the acrylamide polymer obtaining, viscosity-average molecular weight, is that apparent viscosity and apparent viscosity conservation rate in the salt solution of 95 ℃ and when concentration is 1500mg/L is as shown in table 2 in salinity 10000mg/L, temperature.
Embodiment 8
The present embodiment is used for explanation according to redox initiator system of the present invention and acrylamide polymer and preparation method thereof.
23.75 kilograms of acrylamides and 71.25 kilograms of 2-acrylamide-2-methylpro panesulfonic acids are put into the polymerization reaction kettle with surface thermocouple, add 128.35 kilograms of deionized waters, stir down to dissolving completely.Slowly adding mass concentration is 54.28 kilograms of 25% sodium hydroxide solutions, add mass concentration be 0.05% 2,1.0 kilograms of 2 '-azo (2-amidine propane) dihydrochloride aqueous solution, compound PD-2 (concrete structure is in Table 1) shown in 5 grams of formula I, the pH value of system is 7.0, after letting nitrogen in and deoxidizing 30 minutes, reacting liquid temperature is reduced to 4 ℃.Adding mass concentration is 5.0 kilograms of 0.05% sodium sulfite solution, mass concentration is 5.0 kilograms of 0.1% ammonium persulfate aqueous solutions, 12 minutes rear surface thermopairs show that polymerization system starts to heat up, start timing, polyreaction was carried out after 6 hours, temperature in the kettle is raised to 60 ℃, slaking 3 hours, obtain gum polymers product, through granulation, dry, pulverize, screening obtains acrylamide polymer.The limiting viscosity of the acrylamide polymer obtaining, viscosity-average molecular weight, is that apparent viscosity and apparent viscosity conservation rate in the salt solution of 95 ℃ and when concentration is 1500mg/L is as shown in table 2 in salinity 10000mg/L, temperature.
Embodiment 9
The present embodiment is used for explanation according to redox initiator system of the present invention and acrylamide polymer and preparation method thereof.
23.75 kilograms of acrylamides and 26.25 kilograms of NVPs are put into the polymerization reaction kettle with surface thermocouple, add 128.35 kilograms of deionized waters, stir down to dissolving completely.Slowly adding mass concentration is 0.1 kilogram of 25% sodium hydroxide solution, add mass concentration be 0.05% 2,1.0 kilograms of 2 '-azo (2-amidine propane) dihydrochloride aqueous solution, compound PD-2 (concrete structure is in Table 1) shown in 5 grams of formula I, the pH value of system is 7.0, after letting nitrogen in and deoxidizing 30 minutes, reacting liquid temperature is reduced to 4 ℃.Adding mass concentration is 5.0 kilograms of 0.05% sodium sulfite solution, mass concentration is 5.0 kilograms of 0.1% ammonium persulfate aqueous solutions, 30 minutes rear surface thermopairs show that polymerization system starts to heat up, start timing, polyreaction was carried out after 6 hours, temperature in the kettle is raised to 60 ℃, slaking 3 hours, obtain gum polymers product, through granulation, dry, pulverize, screening obtains acrylamide polymer.The limiting viscosity of the acrylamide polymer obtaining, viscosity-average molecular weight, is that apparent viscosity and apparent viscosity conservation rate in the salt solution of 95 ℃ and when concentration is 1500mg/L is as shown in table 2 in salinity 10000mg/L, temperature.
The present embodiment is used for explanation according to redox initiator system of the present invention and acrylamide polymer and preparation method thereof.
23.75 kilograms of acrylamides and 26.25 kilograms of N,N-DMAAs are put into the polymerization reaction kettle with surface thermocouple, add 128.35 kilograms of deionized waters, stir down to dissolving completely.Slowly adding mass concentration is 0.05 kilogram of 25% sodium hydroxide solution, add mass concentration be 0.05% 2,1.0 kilograms of 2 '-azo (2-amidine propane) dihydrochloride aqueous solution, compound PD-2 (concrete structure is in Table 1) shown in 5 grams of formula I, the pH value of system is 7.0, after letting nitrogen in and deoxidizing 30 minutes, reacting liquid temperature is reduced to 4 ℃.Adding mass concentration is 5.0 kilograms of 0.05% sodium sulfite solution, mass concentration is 5.0 kilograms of 0.1% ammonium persulfate aqueous solutions, 15 minutes rear surface thermopairs show that polymerization system starts to heat up, start timing, polyreaction was carried out after 6 hours, temperature in the kettle is raised to 60 ℃, slaking 3 hours, obtain gum polymers product, through granulation, dry, pulverize, screening obtains acrylamide polymer.The limiting viscosity of the acrylamide polymer obtaining, viscosity-average molecular weight, is that apparent viscosity and apparent viscosity conservation rate in the salt solution of 95 ℃ and when concentration is 1500mg/L is as shown in table 2 in salinity 10000mg/L, temperature.
Embodiment 11
The present embodiment is used for explanation according to redox initiator system of the present invention and acrylamide polymer and preparation method thereof.
By 23.75 kilograms of acrylamides and 13.125 kilograms of 2-acrylamide-2-methylpro panesulfonic acids and 13.125 kilograms of N, N-DMAA is put into the polymerization reaction kettle with surface thermocouple, add 128.35 kilograms of deionized waters, stir down to dissolving completely.Slowly adding mass concentration is 10 kilograms of 25% sodium hydroxide solutions, add mass concentration be 0.05% 2,1.0 kilograms of 2 '-azo (2-amidine propane) dihydrochloride aqueous solution, compound PD-2 (concrete structure is in Table 1) shown in 5 grams of formula I, the pH value of system is 7.0, after letting nitrogen in and deoxidizing 30 minutes, reacting liquid temperature is reduced to 4 ℃.Adding mass concentration is 5.0 kilograms of 0.05% sodium sulfite solution, mass concentration is 5.0 kilograms of 0.1% ammonium persulfate aqueous solutions, 12 minutes rear surface thermopairs show that polymerization system starts to heat up, start timing, polyreaction was carried out after 6 hours, temperature in the kettle is raised to 60 ℃, slaking 3 hours, obtain gum polymers product, through granulation, dry, pulverize, screening obtains acrylamide polymer.The limiting viscosity of the acrylamide polymer obtaining, viscosity-average molecular weight, is that apparent viscosity and apparent viscosity conservation rate in the salt solution of 95 ℃ and when concentration is 1500mg/L is as shown in table 2 in salinity 10000mg/L, temperature.
Embodiment 12
The present embodiment is used for explanation according to redox initiator system of the present invention and acrylamide polymer and preparation method thereof.
23.75 kilograms of acrylamides and 13.125 kilograms of 2-acrylamide-2-methylpro panesulfonic acids and 13.125 kilograms of NVPs are put into the polymerization reaction kettle with surface thermocouple, add 128.35 kilograms of deionized waters, stir down to dissolving completely.Slowly adding mass concentration is 10 kilograms of 25% sodium hydroxide solutions, add mass concentration be 0.05% 2,1.0 kilograms of 2 '-azo (2-amidine propane) dihydrochloride aqueous solution, compound PD-2 (concrete structure is in Table 1) shown in 5 grams of formula I, the pH value of system is 7.0, after letting nitrogen in and deoxidizing 30 minutes, reacting liquid temperature is reduced to 4 ℃.Adding mass concentration is 5.0 kilograms of 0.05% sodium sulfite solution, mass concentration is 5.0 kilograms of 0.1% ammonium persulfate aqueous solutions, 30 minutes rear surface thermopairs show that polymerization system starts to heat up, start timing, polyreaction was carried out after 6 hours, temperature in the kettle is raised to 60 ℃, slaking 3 hours, obtain gum polymers product, through granulation, dry, pulverize, screening obtains acrylamide polymer.The limiting viscosity of the acrylamide polymer obtaining, viscosity-average molecular weight, is that apparent viscosity and apparent viscosity conservation rate in the salt solution of 95 ℃ and when concentration is 1500mg/L is as shown in table 2 in salinity 10000mg/L, temperature.
Embodiment 13
The present embodiment is used for explanation according to redox initiator system of the present invention and acrylamide polymer and preparation method thereof.
23.75 kilograms of acrylamides and 26.25 kilograms of 2-acrylamide-2-methylpro panesulfonic acids are put into the polymerization reaction kettle with surface thermocouple, add 128.35 kilograms of deionized waters, stir down to dissolving completely.Slowly adding mass concentration is 20 kilograms of 25% sodium hydroxide solutions, add mass concentration be 0.05% 2,1.0 kilograms of 2 '-azo (2-amidine propane) dihydrochloride aqueous solution, compound PD-3 shown in compound PD-1 shown in 2.5 grams of formula I and 2.5 grams of formula I, the pH value of system is 7.0, after letting nitrogen in and deoxidizing 30 minutes, reacting liquid temperature is reduced to 4 ℃.Adding mass concentration is 5.0 kilograms of 0.05% sodium sulfite solution, mass concentration is 5.0 kilograms of 0.1% ammonium persulfate aqueous solutions, 5 minutes rear surface thermopairs show that polymerization system starts to heat up, start timing, polyreaction was carried out after 6 hours, temperature in the kettle is raised to 60 ℃, slaking 3 hours, obtain gum polymers product, through granulation, dry, pulverize, screening obtains acrylamide polymer.The limiting viscosity of the acrylamide polymer obtaining, viscosity-average molecular weight, is that apparent viscosity and apparent viscosity conservation rate in the salt solution of 95 ℃ and when concentration is 1500mg/L is as shown in table 2 in salinity 10000mg/L, temperature.
Embodiment 14
The present embodiment is used for explanation according to redox initiator system of the present invention and acrylamide polymer and preparation method thereof.
23.75 kilograms of acrylamides and 26.25 kilograms of 2-acrylamide-2-methylpro panesulfonic acids are put into the polymerization reaction kettle with surface thermocouple, add 128.35 kilograms of deionized waters, stir down to dissolving completely.Slowly adding mass concentration is 20 kilograms of 25% sodium hydroxide solutions, add mass concentration be 0.05% 2,1.0 kilograms of 2 '-azo (2-amidine propane) dihydrochloride aqueous solution, compound PD-5 shown in compound PD-1 shown in 2.5 grams of formula I and 2.5 grams of formula I, the pH value of system is 7.0, after letting nitrogen in and deoxidizing 30 minutes, reacting liquid temperature is reduced to 4 ℃.Adding mass concentration is 5.0 kilograms of 0.05% sodium sulfite solution, mass concentration is 5.0 kilograms of 0.1% ammonium persulfate aqueous solutions, 30 minutes rear surface thermopairs show that polymerization system starts to heat up, start timing, polyreaction was carried out after 6 hours, temperature in the kettle is raised to 60 ℃, slaking 3 hours, obtain gum polymers product, through granulation, dry, pulverize, screening obtains acrylamide polymer.The limiting viscosity of the acrylamide polymer obtaining, viscosity-average molecular weight, is that apparent viscosity and apparent viscosity conservation rate in the salt solution of 95 ℃ and when concentration is 1500mg/L is as shown in table 2 in salinity 10000mg/L, temperature.
The present embodiment is used for explanation according to redox initiator system of the present invention and acrylamide polymer and preparation method thereof.
23.75 kilograms of acrylamides and 26.25 kilograms of 2-acrylamide-2-methylpro panesulfonic acids are put into the polymerization reaction kettle with surface thermocouple, add 128.35 kilograms of deionized waters, stir down to dissolving completely.Slowly adding mass concentration is 20 kilograms of 25% sodium hydroxide solutions, add mass concentration be 0.05% 4,1.0 kilograms of two (4-cyanopentanoic acid) aqueous solution of 4 '-azo, compound PD-6 (concrete structure is in Table 1) shown in 5 grams of formula I, the pH value of system is 7.0, after letting nitrogen in and deoxidizing 30 minutes, reacting liquid temperature is reduced to 4 ℃.Adding mass concentration is 5.0 kilograms of 0.05% sodium sulfite solution, mass concentration is 5.0 kilograms of 0.1% ammonium persulfate aqueous solutions, 8 minutes rear surface thermopairs show that polymerization system starts to heat up, start timing, polyreaction was carried out after 6 hours, temperature in the kettle is raised to 60 ℃, slaking 3 hours, obtain gum polymers product, through granulation, dry, pulverize, screening obtains acrylamide polymer.The limiting viscosity of the acrylamide polymer obtaining, viscosity-average molecular weight, is that apparent viscosity and apparent viscosity conservation rate in the salt solution of 95 ℃ and when concentration is 1500mg/L is as shown in table 2 in salinity 10000mg/L, temperature.
Embodiment 16
The present embodiment is used for explanation according to redox initiator system of the present invention and acrylamide polymer and preparation method thereof.
23.75 kilograms of acrylamides and 26.25 kilograms of 2-acrylamide-2-methylpro panesulfonic acids are put into the polymerization reaction kettle with surface thermocouple, add 128.35 kilograms of deionized waters, stir down to dissolving completely.Slowly adding mass concentration is 20 kilograms of 25% sodium hydroxide solutions, add mass concentration be 0.05% 2,1.0 kilograms of 2 '-azo (2-amidine propane) dihydrochloride aqueous solution, compound PD-6 (concrete structure is in Table 1) shown in 5 grams of formula I, the pH value of system is 7.0, after letting nitrogen in and deoxidizing 30 minutes, reacting liquid temperature is reduced to 4 ℃.Adding mass concentration is 5.0 kilograms of 0.05% sodium sulfite solution, mass concentration is 5.0 kilograms of 0.1% persulfate aqueous solutions, 25 minutes rear surface thermopairs show that polymerization system starts to heat up, start timing, polyreaction was carried out after 6 hours, temperature in the kettle is raised to 60 ℃, slaking 3 hours, obtain gum polymers product, through granulation, dry, pulverize, screening obtains acrylamide polymer.The limiting viscosity of the acrylamide polymer obtaining, viscosity-average molecular weight, is that apparent viscosity and apparent viscosity conservation rate in the salt solution of 95 ℃ and when concentration is 1500mg/L is as shown in table 2 in salinity 10000mg/L, temperature.
Embodiment 17
The present embodiment is used for explanation according to redox initiator system of the present invention and acrylamide polymer and preparation method thereof.
23.75 kilograms of acrylamides and 26.25 kilograms of 2-acrylamide-2-methylpro panesulfonic acids are put into the polymerization reaction kettle with surface thermocouple, add 128.35 kilograms of deionized waters, stir down to dissolving completely.Slowly adding mass concentration is 20 kilograms of 25% sodium hydroxide solutions, add mass concentration be 0.05% 2,1.0 kilograms of 2 '-azo (2-amidine propane) dihydrochloride aqueous solution, compound PD-6 (concrete structure is in Table 1) shown in 5 grams of formula I, the pH value of system is 7.0, after letting nitrogen in and deoxidizing 30 minutes, reacting liquid temperature is reduced to 4 ℃.Adding mass concentration is 5.0 kilograms of 0.05% sodium sulfite solutions, mass concentration is 5.0 kilograms of 0.1% ammonium persulfate aqueous solutions, 5 minutes rear surface thermopairs show that polymerization system starts to heat up, start timing, polyreaction was carried out after 6 hours, temperature in the kettle is raised to 60 ℃, slaking 3 hours, obtain gum polymers product, through granulation, dry, pulverize, screening obtains acrylamide polymer.The limiting viscosity of the acrylamide polymer obtaining, viscosity-average molecular weight, is that apparent viscosity and apparent viscosity conservation rate in the salt solution of 95 ℃ and when concentration is 1500mg/L is as shown in table 2 in salinity 10000mg/L, temperature.
Embodiment 18
The present embodiment is used for explanation according to redox initiator system of the present invention and acrylamide polymer and preparation method thereof.
23.75 kilograms of acrylamides and 26.25 kilograms of 2-acrylamide-2-methylpro panesulfonic acids are put into the polymerization reaction kettle with surface thermocouple, add 128.35 kilograms of deionized waters, stir down to dissolving completely.Slowly adding mass concentration is 20 kilograms of 25% sodium hydroxide solutions, add mass concentration be 0.05% 2,1.0 kilograms of 2 '-azo (2-amidine propane) dihydrochloride aqueous solution, compound PD-6 (concrete structure is in Table 1) shown in 0.5 gram of formula I, the pH value of system is 7.0, after letting nitrogen in and deoxidizing 30 minutes, reacting liquid temperature is reduced to 4 ℃.Adding mass concentration is 5.0 kilograms of 0.05% sodium sulfite solution, mass concentration is 5.0 kilograms of 0.1% ammonium persulfate aqueous solutions, 12 minutes rear surface thermopairs show that polymerization system starts to heat up, start timing, polyreaction was carried out after 6 hours, temperature in the kettle is raised to 60 ℃, slaking 3 hours, obtain gum polymers product, through granulation, dry, pulverize, screening obtains acrylamide polymer.The limiting viscosity of the acrylamide polymer obtaining, viscosity-average molecular weight, is that apparent viscosity and apparent viscosity conservation rate in the salt solution of 95 ℃ and when concentration is 1500mg/L is as shown in table 2 in salinity 10000mg/L, temperature.
Embodiment 19
The present embodiment is used for explanation according to redox initiator system of the present invention and acrylamide polymer and preparation method thereof.
23.75 kilograms of acrylamides and 26.25 kilograms of 2-acrylamide-2-methylpro panesulfonic acids are put into the polymerization reaction kettle with surface thermocouple, add 128.35 kilograms of deionized waters, stir down to dissolving completely.Slowly adding mass concentration is 20 kilograms of 25% sodium hydroxide solutions, add mass concentration be 0.05% 2,1.0 kilograms of 2 '-azo (2-amidine propane) dihydrochloride aqueous solution, compound PD-6 (concrete structure is in Table 1) shown in 50 grams of formula I, the pH value of system is 7.0, after letting nitrogen in and deoxidizing 30 minutes, reacting liquid temperature is reduced to 4 ℃.Adding mass concentration is 5.0 kilograms of 0.05% sodium sulfite solution, mass concentration is 5.0 kilograms of 0.1% ammonium persulfate aqueous solutions, 30 minutes rear surface thermopairs show that polymerization system starts to heat up, start timing, polyreaction was carried out after 6 hours, temperature in the kettle is raised to 60 ℃, slaking 3 hours, obtain gum polymers product, through granulation, dry, pulverize, screening obtains acrylamide polymer.The limiting viscosity of the acrylamide polymer obtaining, viscosity-average molecular weight, is that apparent viscosity and apparent viscosity conservation rate in the salt solution of 95 ℃ and when concentration is 1500mg/L is as shown in table 2 in salinity 10000mg/L, temperature.
The present embodiment is used for explanation according to redox initiator system of the present invention and acrylamide polymer and preparation method thereof.
Adopt the method identical with embodiment 2 to prepare acrylamide polymer, different is, do not use 2,2 '-azo (2-amidine propane) dihydrochloride, and the consumption of sodium bisulfite is 0.2g, the consumption of ammonium persulphate is 1g, the consumption of compound PD-2 shown in formula I is 0.2g, the limiting viscosity of the acrylamide polymer obtaining, viscosity-average molecular weight is that apparent viscosity and apparent viscosity conservation rate in the salt solution of 95 ℃ and when concentration is 1500mg/L is as shown in table 2 in salinity 10000mg/L, temperature.
Embodiment 21
The present embodiment is used for explanation according to redox initiator system of the present invention and acrylamide polymer and preparation method thereof.
Adopt the method identical with embodiment 2 to prepare acrylamide polymer, different is, the consumption of sodium bisulfite is 2g, the consumption of ammonium persulphate is 1g, the consumption of compound PD-2 shown in formula I is 5g, the limiting viscosity of the acrylamide polymer obtaining, viscosity-average molecular weight, is that apparent viscosity and apparent viscosity conservation rate in the salt solution of 95 ℃ and when concentration is 1500mg/L is as shown in table 2 in salinity 10000mg/L, temperature.
Comparative example 1
Adopt the method identical with embodiment 1 to prepare acrylamide polymer, different, redox initiator system is served as reasons
the redox initiation system of (with reference to Heilongjiang University's natural science journal, 13 (3): in 74-78, disclosed method is synthetic) and Potassium Persulphate and S-WAT composition, wherein (
the consumption of Potassium Persulphate and S-WAT is respectively 5 grams, 5 grams and 2.5 grams, at 40 ℃, acrylamide triggered and 2-acrylamide-2-methylpro panesulfonic acid carries out the polyreaction of 6 hours, then slaking 3 hours at 60 ℃, obtain gum polymers product, through granulation, dry, pulverize, screening obtains acrylamide polymer.The limiting viscosity of the acrylamide polymer obtaining, viscosity-average molecular weight, is that apparent viscosity and apparent viscosity conservation rate in the salt solution of 95 ℃ and when concentration is 1500mg/L is as shown in table 2 in salinity 10000mg/L, temperature.
Comparative example 2
Adopt the method identical with embodiment 1 to prepare acrylamide polymer, different, redox initiator system is served as reasons
(with reference to Heilongjiang University's natural science journal, 13 (3): in 74-78, disclosed method is synthetic), with the redox initiation system of Potassium Persulphate and S-WAT composition, wherein (
, Potassium Persulphate and S-WAT consumption be respectively 5 grams, 5 grams and 2.5 grams, at 4 ℃, acrylamide triggered and 2-acrylamide-2-methylpro panesulfonic acid carries out the polyreaction of 6 hours, then slaking 3 hours at 60 ℃, obtain gum polymers product, through granulation, dry, pulverize, screening obtains acrylamide polymer.The limiting viscosity of the acrylamide polymer obtaining, viscosity-average molecular weight, is that apparent viscosity and apparent viscosity conservation rate in the salt solution of 95 ℃ and when concentration is 1500mg/L is as shown in table 2 in salinity 10000mg/L, temperature.
Table 1
Table 2
From table 2, can see, the acrylamide polymer that adopts redox initiator system provided by the invention to prepare according to the preparation method of acrylamide polymer provided by the invention not only has high molecular weight (wherein, viscosity-average molecular weight is in 1,300 ten thousand-1,640 ten thousand scope), and in solution, there is high apparent viscosity, in concentration, be that the aqueous solution of 1500 mg/litre and the salinity acrylamide polymer that is 10000mg/L reaches 20.4-28.3mPas the apparent viscosity of 95 ℃.
And, acrylamide polymer according to the present invention carries out the weathering test of 1 month in the oxygen-free environment of 95 ℃, apparent viscosity conservation rate is more than 90%, carry out the weathering test of 3 months, apparent viscosity conservation rate is more than 80%, meet the company standard Q/SH10201572-2006 of Shengli Oilfiedld Subsidiary Company Of China Petrochemical Corporation, therefore acrylamide polymer according to the present invention is particularly useful for making three class oil reservoir used for tertiary oil recovery polymer oil-displacing agents.
The temperature variant curve comparison figure of apparent viscosity of the product that Fig. 1 has provided embodiment 1 and embodiment 6 preparations and the aqueous solution (concentration is 1500mg/L, and salinity is 10000mg/L) of trade mark FP934PH, the FP6030 of French SNF company production and the acrylamide polymer of FP3640.As can be seen from Figure 1 molten, according to the aqueous solution of acrylamide polymer of the present invention, in high-temperature zone, (60-95 ℃) still has higher apparent viscosity conservation rate, wherein under the high temperature of 95 ℃, more than the aqueous solution apparent viscosity of the acrylamide polymer of embodiment 1 and embodiment 6 still can reach 20.4mPas, and the aqueous solution of the acrylamide polymer of trade mark FP934PH, FP6030 that French SNF company produces and FP3640 to obtain apparent viscosity be only 8-11.9mPas, show that acrylamide polymer according to the present invention has good temperature resistant antisalt performance.
Claims (16)
1. a redox initiator system, this redox initiator system contains persulphate and sulphite, it is characterized in that, and described redox initiator system also contains the compound shown in formula I,
In formula I, R is that carbonatoms is aminoalkyl group and the NH of 1-5
2in a kind of, wherein, in described redox initiator system, the content of described persulphate is 4-85 % by weight, the weight ratio of the compound shown in described persulphate, sulphite and formula I is 1:0.1-10:0.1-10.
2. redox initiator system according to claim 1, wherein, in formula I, R is NH
2(CH
2)
2nH
2in a kind of.
3. redox initiator system according to claim 1, wherein, described sulphite is one or more in ammonium sulphite, potassium sulfite, S-WAT, ammonium bisulfite, Potassium hydrogen sulfite and sodium bisulfite.
4. redox initiator system according to claim 1, wherein, described persulphate is one or more in ammonium persulphate, Potassium Persulphate and Sodium Persulfate.
5. redox initiator system according to claim 1, wherein, described sulphite is sodium bisulfite, and described persulphate is ammonium persulphate, and the compound shown in formula I is
6. the preparation method of an acrylamide polymer, the method is included under the existence of initiator and mineral alkali, acrylamide and temperature resistant antisalt monomer are carried out to polymerization in water, it is characterized in that, described initiator contains the redox initiator system described in any one in claim 1-5, described temperature resistant antisalt monomer is 2-acrylamide-2-methylpro panesulfonic acid, NVP and N, one or more in N-DMAA, the acrylamide described in 100 weight parts of take is benchmark, the amount of described temperature resistant antisalt monomer is 5-400 weight part, the amount of the persulphate in described redox initiator system is 0.001-0.1 weight part, the amount of described mineral alkali is 0.05-80 weight part, the amount of water is 100-4000 weight part.
7. method according to claim 6; wherein; under the existence of initiator and mineral alkali; the method of acrylamide and temperature resistant antisalt monomer being carried out in water to polymerization comprises: by compound and mineral alkali shown in formula I and contain described acrylamide and the aqueous solution of temperature resistant antisalt monomer; under protection of inert gas, after being mixed with the mixture obtaining, described sulphite and persulphate carry out polymerization.
8. method according to claim 6, wherein, described initiator also contains water-soluble azo series initiators, and the 100 weight part acrylamides of take are benchmark, and the amount of described water-soluble azo series initiators is 0.0005-0.05 weight part.
9. method according to claim 8; wherein; under the existence of initiator and mineral alkali; the method of acrylamide and temperature resistant antisalt monomer being carried out in the aqueous solution to polymerization comprises: by the compound shown in formula I, mineral alkali and water-soluble azo class initiator and the aqueous solution that contains described acrylamide and temperature resistant antisalt monomer; under protection of inert gas, after being mixed with the mixture obtaining, described sulphite and persulphate carry out polymerization.
10. method according to claim 8 or claim 9, wherein, described water-soluble azo series initiators is 4,4 '-azo two (4-cyanopentanoic acid).
11. according to the method described in any one in claim 6,7 and 9, and wherein, described mineral alkali is one or more in sodium hydroxide, potassium hydroxide and sodium carbonate.
12. according to the method described in any one in claim 6,7 and 9, and wherein, described polymerization initiation temperature is 0-20 ℃, and the time of described polymerization is 3-10 hour.
13. methods according to claim 6, wherein, the method also comprises carries out the product obtaining slaking at 50-80 ℃.
14. 1 kinds of acrylamide polymers, this acrylamide polymer is to prepare by the method described in any one in claim 6-13.
15. acrylamide polymers according to claim 14, wherein, concentration is that the aqueous solution of 1500 mg/litre and the salinity acrylamide polymer that is 10000mg/L is 20-30mPas the apparent viscosity of 95 ℃.
The application of acrylamide polymer described in 16. claims 14 or 15 in polymer oil-displacing agent.
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