CN105524647A - Compounding type oil field emulsion breaker preparation method - Google Patents
Compounding type oil field emulsion breaker preparation method Download PDFInfo
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Abstract
The present invention discloses a high-performance compounding type oil field emulsion breaker preparation method, which comprises: preparing polyether emulsion breakers with different molecular weights to obtain a polyether emulsion breaker A with a molecular weight of 300-500, a polyether emulsion breaker B with a molecular weight of 700-900, a high molecular weight polyether emulsion breaker C with a molecular weight of 1500-2000, a high molecular weight polyether emulsion breaker D with a molecular weight of 4000-5000, and a high molecular weight polyether emulsion breaker E with a molecular weight of 8000-10000; and compounding various polyether emulsion breakers with different molecular weights according to a certain ratio so as to prepare the high-performance emulsion breaker. According to the present invention, the prepared high-performance emulsion breaker can be used for emulsion breaking dewatering of the oil field crude oil, and has advantages of good broad spectrum and less consumption.
Description
Technical field
The present invention relates to emulsion splitter of a kind of crude oil processed and preparation method thereof, specifically a kind of preparation method of complex oilfield demulsifier.
Background technology
Often be mixed into moisture in oil Jian Bian process, first will pass through dehydration, to reduce transportation cost before Crude Oil Transportation.Free-water in crude oil is easy to separation removal, the emulsified water removed in crude oil generally then needs to add emulsion splitter to carry out, current domestic use based on polyethers emulsion splitter, such emulsion splitter is mostly take active hydrogen compounds as initiator, under base metal catalysts effect, carry out negatively charged ion Jian cyclopolymerization react with olefin oxide, obtained polyoxyethylene poly-oxygen propylene aether class emulsion splitter.Polyethers emulsion splitter single variety molecular weight prepared by this technique is in certain comparatively close limit, and dehydrating effect of emulsion breaker is undesirable, to the wide spectrum bad adaptability of different crude oils oil product.
Oil composition is complicated, and containing different sorts material, molecular weight also varies, and the polyethers emulsion splitter of different molecular weight has special-effect to the material within the scope of certain molecular weight respectively.
Summary of the invention
In order to overcome existing single polyethers emulsion splitter Problems existing, the object of this invention is to provide a kind of preparation method of complex oilfield demulsifier, what the method obtained is the composite emulsion breaker of a kind of relative molecular weight distribution in each different range, the polyethers of various different molecular weight has special breaking emulsion and dewatering effect for different substances in crude oil respectively, and dehydrating effect is desirable, broad spectrum is good.
The object of the invention is to be achieved through the following technical solutions
:
A preparation method for complex oilfield demulsifier, is characterized in that: the method take polyethylene polyamine as initiator, react with propylene oxide, ethylene oxide under K0H catalyst action prepare molecular weight lower than 1000 polyethers emulsion splitter; By molecular weight be 500 polyoxypropylene polyether polyvalent alcohol react with propylene oxide under bimetallic catalyst effect, prepare the polyoxypropylene polyether polyvalent alcohol of molecular weight more than 4000, then basic catalyst is added, react with ethylene oxide under basic catalyst effect, prepare high molecular weight polyether emulsion splitter; By molecular weight lower than 1000 polyethers emulsion splitter mix with high molecular weight polyether emulsion splitter, obtain complex oilfield demulsifier; Specific as follows
:
Take polyethylene polyamine as initiator, reacting with propylene oxide, ethylene oxide under K0H catalyst action and prepare molecular weight lower than the polyethers emulsion splitter of 1000, preparing molecular weight respectively at 300-500 and the molecular weight polyethers emulsion splitter at 700-900 by controlling ingredient proportion; Preparation process is as follows:
Polyethylene polyamine and K0H add in reactor, heat temperature raising, control to pass into propylene oxide at 120 140 ° of C, pressure maintains below 0.3MPa, and make it fully react, and then pass into ethylene oxide, pressure maintains below 0.3MPa, and make it fully react, by control ingredient proportion respectively obtained molecular weight at the polyethers emulsion splitter A of 300-500 and the molecular weight polyethers emulsion splitter B at 700-900.
When preparing polyethers A, wherein part by weight is, with polyethylene polyamine, propylene oxide and ethylene oxide for total amount, polyethylene polyamine accounts for the 46-77% of total amount, and propylene oxide accounts for the 15-32% of total amount, and ethylene oxide accounts for the 8-22% of total amount; K0H catalyst levels is the 1.5-3.5% of total amount.
When preparing polyethers B, wherein part by weight is, with polyethylene polyamine, propylene oxide and ethylene oxide for total amount, polyethylene polyamine accounts for the 25-33% of total amount, and propylene oxide accounts for the 25-45% of total amount, and ethylene oxide accounts for the 25-45% of total amount; K0H catalyst levels is the 1.5-3.5% of total amount.
Prepare high molecular weight polyether, by molecular weight be 500 polyoxypropylene polyether polyvalent alcohol react with propylene oxide under bimetallic catalyst effect, prepare the polyoxypropylene polyether polyvalent alcohol of molecular weight more than 1000, then basic catalyst is added, react with ethylene oxide under basic catalyst effect, prepare high molecular weight polyether; Molecular weight is prepared respectively at 1500-2000, molecular weight at 4000-5000 and the molecular weight high-molecular-weight poly ethers emulsion splitter at 8000-10000 by controlling ingredient proportion; Prepare high-molecular-weight poly ether type emulsion splitter step as follows
:
Prepare the high-molecular-weight poly ethers emulsion splitter C of molecular weight at 1500-2000:
1. PPG500 adds in reactor, heat temperature raising, controls to vacuumize 2 hours at 120 140 ° of C, add bimetallic catalyst, then pass into propylene oxide, control temperature is at 130 200 ° of C, pressure maintains below 0.3MPa, and makes it fully react, and obtains polyethers M; Wherein part by weight is, PPG500 accounts for the 40-60% of PPG500 and propylene oxide total amount, and propylene oxide accounts for the 40-60% of PPG500 and propylene oxide total amount, and bimetallic catalyst consumption is 30-200ppm, with PPG500 and propylene oxide total amount.
2. with polyethers M for raw material, add basic catalyst, heat temperature raising, pass into ethylene oxide, control temperature is at 120 160 ° of C, and pressure maintains below 0.3MPa, and makes it fully react, obtained high-molecular-weight poly ether type emulsion splitter C.
Wherein part by weight is, polyethers M accounts for the 44-83% of polyethers M and ethylene oxide total amount.Ethylene oxide accounts for the 17-56% of polyethers M and ethylene oxide total amount.Basic catalyst consumption is 0.2-2%, and with polyethers M and ethylene oxide total amount, basic catalyst is the one in potassium hydroxide or sodium hydroxide.
Prepare the high-molecular-weight poly ethers emulsion splitter D of molecular weight at 4000-5000:
1. PPG500 adds in reactor, heat temperature raising, controls to vacuumize 2 hours at 120 140 ° of C; add bimetallic catalyst, then pass into propylene oxide, control temperature is at 130 200 ° of C; pressure maintains below 0.3MPa, and makes it fully react, and obtains polyethers M; Wherein part by weight is, PPG500 accounts for the 20-30% of PPG500 and propylene oxide total amount, and propylene oxide accounts for the 70-80% of PPG500 and propylene oxide total amount, and bimetallic catalyst consumption is 30-200ppm, with PPG500 and propylene oxide total amount.
2. with polyethers M for raw material, add basic catalyst, heat temperature raising, pass into ethylene oxide, control temperature is at 120 160 ° of C, and pressure maintains below 0.3MPa, and makes it fully react, obtained high-molecular-weight poly ether type emulsion splitter C;
Wherein part by weight is, polyethers M accounts for the 37-67% of polyethers M and ethylene oxide total amount.Ethylene oxide accounts for the 20-50% of polyethers M and ethylene oxide total amount.Basic catalyst consumption is 0.2-2%, and with polyethers M and ethylene oxide total amount, basic catalyst is the one in potassium hydroxide or sodium hydroxide.
Prepare the high-molecular-weight poly ethers emulsion splitter E of molecular weight at 8000-10000:
1. PPG500 adds in reactor, heat temperature raising, controls to vacuumize 2 hours at 120 140 ° of C; add bimetallic catalyst, then pass into propylene oxide, control temperature is at 130 200 ° of C; pressure maintains below 0.3MPa, and makes it fully react, and obtains polyethers M; Wherein part by weight is, PPG500 accounts for the 8_10% of PPG500 and propylene oxide total amount, and propylene oxide accounts for the 90-92% of PPG500 and propylene oxide total amount, and bimetallic catalyst consumption is 30_200ppm, with PPG500 and propylene oxide total amount.
2. with polyethers M for raw material, add basic catalyst, heat temperature raising, pass into ethylene oxide, control temperature is at 120 160 ° of C, and pressure maintains below 0.3MPa, and makes it fully react, obtained high-molecular-weight poly ether type emulsion splitter C.
Wherein part by weight is, polyethers M accounts for the 22-50% of polyethers M and ethylene oxide total amount.Ethylene oxide accounts for the 20-50% of polyethers M and ethylene oxide total amount.Basic catalyst consumption is 0.2-2%, and with polyethers M and ethylene oxide total amount, basic catalyst is the one in potassium hydroxide or sodium hydroxide.
[0008]
3) A, B, C, D, E5 kind emulsion splitter composite mixing obtained complex oilfield demulsifier afterwards in proportion will prepared above; The weight ratio of A, B, C, D, E5 kind emulsion splitter is: 1-2:1-2:1-2:1-2:1-2.
Bian K0H catalyzer of the present invention prepare respectively 2 kinds of molecular weight lower than 1000 polyethers emulsion splitter, Bian effective catalyst and special process prepare the high-molecular-weight poly ether type emulsion splitter of 3 kinds of molecular weight more than 1000,5 kinds of different molecular weight polyethers demulsifier compounds obtain high performance emulsion splitter, the polyethers of various different molecular weight has special breaking emulsion and dewatering effect for different substances in crude oil respectively, and dehydrating effect is desirable, broad spectrum is good.
Embodiment
Example 1
A preparation method for complex oilfield demulsifier, specifically comprises the following steps: 1) prepare the polyethers emulsion splitter A of molecular weight at 200-400:
200 parts of polyethylene polyamines and 4 parts of K0H add in reactor, heat temperature raising, control to pass into propylene oxide 80 parts at 120 140 ° of C, pressure maintains below 0.3MPa, and make it fully react, and then pass into ethylene oxide 70 parts, pressure maintains below 0.3MPa, and make it fully react, final obtained polyethylene polyamine class polyether type demulsifying agent A.
2) the polyethers emulsion splitter B of molecular weight at 700-900 is prepared:
200 parts of polyethylene polyamines and 4 parts of K0H add in reactor, heat temperature raising, control to pass into propylene oxide 450 parts at 120 140 ° of C, pressure maintains below 0.3MPa, and make it fully react, and then pass into ethylene oxide 350 parts, pressure maintains below 0.3MPa, and make it fully react, and final obtained polyethylene polyamine class polyether type demulsifying agent 3) prepare the polyethers emulsion splitter C of molecular weight at 1500-2000.
500 grams of PPG500 (polyoxypropylene polyether polyvalent alcohols are added in reactor, molecular weight 500), heat temperature raising, control to vacuumize 2 hours at 120 140 ° of C, add 0.2 gram of bimetallic catalyst, bimetallic catalyst adopts the polyethers catalyst prod of Nantong Huike Polyurethane Research & Development Co., Ltd.Then pass into 900 grams of propylene oxides, control temperature is at 130 200 ° of C, and pressure maintains below 0.3MPa, and makes it fully react.In reactor, add 4 grams of potassium hydroxide again, pass into 500 grams of ethylene oxides, control temperature is at 120 160 ° of C, and pressure maintains below 0.3MPa, and makes it fully react, and obtained molecular weight is at the polyethers emulsion splitter C of 1500-2000.
4) the polyethers emulsion splitter D of molecular weight at 4000-5000 is prepared:
500 grams of PPG500 (polyoxypropylene polyether polyvalent alcohols are added in reactor, molecular weight 500), heat temperature raising, control to vacuumize 2 hours at 120 140 ° of C, add 0.3 gram of bimetallic catalyst, the bimetallic catalyst Bian polyethers catalyst prod of Nantong Huike Polyurethane Research & Development Co., Ltd.Then pass into 2700 grams of propylene oxides, control temperature is at 130 200 ° of C, and pressure maintains below 0.3MPa, and makes it fully react.In reactor, add 12 grams of potassium hydroxide again, pass into 1400 grams of ethylene oxides, control temperature is at 120 160 ° of C, and pressure maintains below 0.3MPa, and makes it fully react, and obtained molecular weight is at the polyethers emulsion splitter D of 4000-5000.
5) the polyethers emulsion splitter E of molecular weight at 8000-10000 is prepared:
500 grams of PPG500 (polyoxypropylene polyether polyvalent alcohols are added in reactor, molecular weight 500), heat temperature raising, control to vacuumize 2 hours at 120 140 ° of C, add 0.4 gram of bimetallic catalyst, the bimetallic catalyst Bian polyethers catalyst prod of Nantong Huike Polyurethane Research & Development Co., Ltd.Then pass into 5000 grams of propylene oxides, control temperature is at 130 200 ° of C, and pressure maintains below 0.3MPa, and makes it fully react.In reactor, add 23 grams of potassium hydroxide again, pass into 3500 grams of ethylene oxides, control temperature is at 120 160 ° of C, and pressure maintains below 0.3MPa, and makes it fully react, and obtained molecular weight is at the polyethers emulsion splitter E of 8000-10000.
[0015] 6) 100 parts of emulsion splitter A, 100 parts of emulsion splitter B, 100 parts of emulsion splitter C, 150 parts of emulsion splitter C and 200 part of emulsion splitter E are added in reactor, be uniformly mixed, obtained high-performance complex oilfield demulsifier.
Claims (2)
1. a preparation method for complex oilfield demulsifier, is characterized in that: the method take polyethylene polyamine as initiator, react with propylene oxide, ethylene oxide under K0H catalyst action prepare molecular weight lower than 1000 polyethers emulsion splitter; By molecular weight be 500 polyoxypropylene polyether polyvalent alcohol react with propylene oxide under bimetallic catalyst effect, prepare the polyoxypropylene polyether polyvalent alcohol of molecular weight more than 4000, then basic catalyst is added, react with ethylene oxide under basic catalyst effect, prepare high molecular weight polyether emulsion splitter; By molecular weight lower than 1000 polyethers emulsion splitter mix with high molecular weight polyether emulsion splitter, obtain complex oilfield demulsifier;
Specific as follows
:
Take polyethylene polyamine as initiator, reacting with propylene oxide, ethylene oxide under KOH catalyst action and prepare molecular weight lower than the polyethers emulsion splitter of 1000, preparing molecular weight respectively at 300-500 and the molecular weight polyethers emulsion splitter at 700-900 by controlling ingredient proportion;
Preparation process is as follows:
Polyethylene polyamine and K0H add in reactor, heat temperature raising, control to pass into propylene oxide at 120 140 ° of C, pressure maintains below 0.3MPa, and make it fully react, and then pass into ethylene oxide, pressure maintains below 0.3MPa, and make it fully react, by control ingredient proportion respectively obtained molecular weight at the polyethers emulsion splitter A of 300-500 and the molecular weight polyethers emulsion splitter B at 700-900;
When preparing polyethers A, wherein part by weight is, with polyethylene polyamine, propylene oxide and ethylene oxide for total amount, polyethylene polyamine accounts for the 46-77% of total amount, and propylene oxide accounts for the 15-32% of total amount, and ethylene oxide accounts for the 8-22% of total amount; KOH catalyst levels is the 1.5-3.5% of total amount;
When preparing polyethers B, wherein part by weight is, with polyethylene polyamine, propylene oxide and ethylene oxide for total amount, polyethylene polyamine accounts for the 25-33% of total amount, and propylene oxide accounts for the 25-45% of total amount, and ethylene oxide accounts for the 25-45% of total amount; KOH catalyst levels is the 1.5-3.5% of total amount;
Prepare high molecular weight polyether, by molecular weight be 500 polyoxypropylene polyether polyvalent alcohol react with propylene oxide under bimetallic catalyst effect, prepare the polyoxypropylene polyether polyvalent alcohol of molecular weight more than 1000, then basic catalyst is added, react with ethylene oxide under basic catalyst effect, prepare high molecular weight polyether; Molecular weight is prepared respectively at 1500-2000, molecular weight at 4000-5000 and the molecular weight high-molecular-weight poly ethers emulsion splitter at 8000-10000 by controlling ingredient proportion;
Prepare high-molecular-weight poly ether type emulsion splitter step as follows
:
Prepare the high-molecular-weight poly ethers emulsion splitter C of molecular weight at 1500-2000:
1. PPG500 adds in reactor, heat temperature raising, controls to vacuumize 2 hours at 120 140 ° of C, add bimetallic catalyst, then pass into propylene oxide, control temperature is at 130 200 ° of C, pressure maintains below 0.3MPa, and makes it fully react, and obtains polyethers M; Wherein part by weight is, PPG500 accounts for the 40-60% of PPG500 and propylene oxide total amount, and propylene oxide accounts for the 40-60% of PPG500 and propylene oxide total amount, and bimetallic catalyst consumption is 30-200ppm, with PPG500 and propylene oxide total amount;
2. with polyethers M for raw material, add basic catalyst, heat temperature raising, pass into ethylene oxide, control temperature is at 120 160 ° of C, and pressure maintains below 0.3MPa, and makes it fully react, obtained high-molecular-weight poly ether type emulsion splitter C;
Wherein part by weight is, polyethers M accounts for the 44-83% of polyethers M and ethylene oxide total amount;
Ethylene oxide accounts for the 17-56% of polyethers M and ethylene oxide total amount;
Basic catalyst consumption is 0.2-2%, and with polyethers M and ethylene oxide total amount, basic catalyst is the one in potassium hydroxide or sodium hydroxide;
Prepare the high-molecular-weight poly ethers emulsion splitter D of molecular weight at 4000-5000:
1. PPG500 adds in reactor, heat temperature raising, controls to vacuumize 2 hours at 120 140 ° of C; add bimetallic catalyst, then pass into propylene oxide, control temperature is at 130 200 ° of C; pressure maintains below 0.3MPa, and makes it fully react, and obtains polyethers M; Wherein part by weight is, PPG500 accounts for the 20-30% of PPG500 and propylene oxide total amount, and propylene oxide accounts for the 70-80% of PPG500 and propylene oxide total amount, and bimetallic catalyst consumption is 30-200ppm, with PPG500 and propylene oxide total amount;
2. with polyethers M for raw material, add basic catalyst, heat temperature raising, pass into ethylene oxide, control temperature is at 120 160 ° of C, and pressure maintains below 0.3MPa, and makes it fully react, obtained high-molecular-weight poly ether type emulsion splitter C; Wherein part by weight is, polyethers M accounts for the 37-67% of polyethers M and ethylene oxide total amount; Ethylene oxide accounts for the 20-50% of polyethers M and ethylene oxide total amount;
Basic catalyst consumption is 0.2-2%, and with polyethers M and ethylene oxide total amount, basic catalyst is the one in potassium hydroxide or sodium hydroxide;
Prepare the high-molecular-weight poly ethers emulsion splitter E of molecular weight at 8000-10000:
1. PPG500 adds in reactor, heat temperature raising, controls to vacuumize 2 hours at 120 140 ° of C; add bimetallic catalyst, then pass into propylene oxide, control temperature is at 130 200 ° of C; pressure maintains below 0.3MPa, and makes it fully react, and obtains polyethers M; Wherein part by weight is, PPG500 accounts for the 8_10% of PPG500 and propylene oxide total amount, and propylene oxide accounts for the 90-92% of PPG500 and propylene oxide total amount, and bimetallic catalyst consumption is 30-200ppm, with PPG500 and propylene oxide total amount;
2. with polyethers M for raw material, add basic catalyst, heat temperature raising, pass into ethylene oxide, control temperature is at 120 160 ° of C, and pressure maintains below 0.3MPa, and makes it fully react, obtained high-molecular-weight poly ether type emulsion splitter C;
Wherein part by weight is, polyethers M accounts for the 22-50% of polyethers M and ethylene oxide total amount; Ethylene oxide accounts for the 20-50% of polyethers M and ethylene oxide total amount;
Basic catalyst consumption is 0.2-2%, and with polyethers M and ethylene oxide total amount, basic catalyst is the one in potassium hydroxide or sodium hydroxide;
By A, B, C, D, E5 kind emulsion splitter composite mixing obtained complex oilfield demulsifier afterwards in proportion prepared above, the weight ratio of A, B, C, D, E5 kind emulsion splitter is: 1-2:1-2:1-2:1-2:1-2.
2. the preparation method of complex oilfield demulsifier according to claim 1, is characterized in that: described bimetallic catalyst is the bimetallic cyanide complex catalyst for epoxide ring-opening polymerization.
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