CN102093526B - Preparation method of demulsifier for oil fields - Google Patents
Preparation method of demulsifier for oil fields Download PDFInfo
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- CN102093526B CN102093526B CN2010105586957A CN201010558695A CN102093526B CN 102093526 B CN102093526 B CN 102093526B CN 2010105586957 A CN2010105586957 A CN 2010105586957A CN 201010558695 A CN201010558695 A CN 201010558695A CN 102093526 B CN102093526 B CN 102093526B
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Abstract
The invention discloses a preparation method of a demulsifier for oil fields. In the method, fatty alcohol is used as a raw material, and the demulsifier is prepared by crosslinking and modifying after reacting the fatty alcohol with oxirane and epoxypropane. First, the fatty alcohol is used as an initiator, and a polyether demulsifier A is prepared by reacting the fatty alcohol with propylene oxide and ethylene oxide in the presence of a basic catalyst. Then, a product B is prepared by carrying out self-crosslinking reaction on the polyether demulsifier A with polycarboxylic acid under the action of the catalyst. Finally, a final product, i.e. the high-performance demulsifier, is prepared by carrying out self-crosslinking reaction on the polyether demulsifier A and the product B in a solvent with adoption of toluene diisocynate. The demulsifier prepared with the method has the advantages of high relative molecular weight, ideal dewatering effect and good broad spectrum property, and can be used for demulsifying and dewatering oil field crude oil. Separated water is clear, and the use amount of the demulsifier is small.
Description
Technical field
The present invention relates to a kind of preparation method of emulsion splitter, the oil field that the defeated processed of specifically a kind of crude oil collection is used is with the preparation method of emulsion splitter.
Background technology
Often sneak into moisture in the oil production process, will be before Crude Oil Transportation earlier through dehydration, to reduce transportation cost.Free-water in the crude oil is easy to separation removal; Removing emulsified water in the crude oil generally then need add emulsion splitter and carry out; Present domestic use be main with the polyethers emulsion splitter; Such emulsion splitter mostly is to be initiator with the active hydrogen compounds, under the base metal catalysts effect, carries out the anionic ring-opening polymerization reaction with olefin oxide, makes polyoxyethylene poly-oxygen propylene aether class emulsion splitter.The side reaction when preparation higher molecular weight polyethers of this technology is more, and the pfpe molecule amount that makes is lower, and dehydrating effect of emulsion breaker is undesirable, to the wide spectrum bad adaptability of different crude oils oil product.
Summary of the invention
In order to overcome the problem that existing polyethers emulsion splitter exists; The object of the present invention is to provide the preparation method of a kind of oil field with emulsion splitter; The present invention is on the basis of preparing the polyethers emulsion splitter; Polyethers emulsion splitter with preparation adopts polycarboxylic acid to carry out the esterification and crosslinking reaction again, and then the product that makes is made with tolylene diisocyanate and the reaction of polyethers emulsion splitter.The emulsion splitter that obtains is the high-performance emulsion splitter that a kind of relative molecular weight is higher, dehydrating effect is desirable, broad spectrum is good.
The objective of the invention is to realize through following technical scheme:
A kind of oil field is characterized in that with the preparation method of emulsion splitter this method may further comprise the steps:
1) preparation polyethers emulsion splitter A; With the aliphatics alcohols is initiator, in the presence of basic catalyst, makes polyethers emulsion splitter A with propylene oxide and ethylene oxide reaction; The wherein wt ratio does; As total amount, polyethylene polyamine accounts for the 0.2-1% of total amount in polyethylene polyamine, propylene oxide and ethylene oxide, and propylene oxide accounts for the 49-79.8% of total amount; Ethylene oxide accounts for the 20-50% of total amount, and the basic catalyst consumption is the 0.2-2% of total amount; The aliphatics alcohols is one or more mixtures in methyl alcohol, ethanol, propyl alcohol, butanols, octadecanol, terepthaloyl moietie, Ucar 35, butyleneglycol, USP Kosher, TriMethylolPropane(TMP), the tetramethylolmethane.
2) preparation product B; Under catalyst action, adopt polycarboxylic acid that polyethers emulsion splitter A is carried out self-crosslinking reaction, make product B.Wherein catalyzer can be Witco 1298 Soft Acid or p-methyl benzenesulfonic acid, preferred p-methyl benzenesulfonic acid.Polycarboxylic acid can be oxalic acid, Succinic Acid or hexanodioic acid, preferred Succinic Acid.
3) in solvent, adopt tolylene diisocyanate to carry out self-crosslinking reaction polyethers emulsion splitter A and product B, obtain final product high-performance emulsion splitter; The wherein wt ratio does, as total amount, polyethers emulsion splitter A accounts for the 20-40% of total amount with polyethers emulsion splitter A and product B, and product B accounts for the 60-80% of total amount, solvent load be total amount 0.3-3 doubly, the tolylene diisocyanate consumption is the 0.5-6% of total amount.
Preparation polyethers emulsion splitter A concrete steps are following:
Aliphatic polyol and basic catalyst add in the reactor drum, and heat temperature raising feeds propylene oxide; Controlled temperature is at 115～165 ℃, and pressure maintains below the 0.6MPa, and it is fully reacted; Vacuum 1 hour feeds ethylene oxide again, and controlled temperature is at 115～165 ℃; Pressure maintains below the 0.3MPa, and it is fully reacted, and makes polyethers emulsion splitter A.The wherein wt ratio does; As total amount, aliphatic polyol accounts for the 0.2-1% of total amount in aliphatic polyol, propylene oxide and ethylene oxide, and propylene oxide accounts for the 49-79.8% of total amount; Ethylene oxide accounts for the 20-50% of total amount; In total amount, the basic catalyst consumption is 0.2-2%, the preferred Pottasium Hydroxide of basic catalyst.
Preparation product B concrete steps are following:
The polyethers emulsion splitter A of step 1 preparation is added in the reactor drum, add catalyzer, heat temperature raising; Controlled temperature is at 85～115 ℃, and normal pressure adds polycarboxylic acid down, reacts 2 hours; Vacuum 1 hour, process control temp make product B after filtering at 85～115 ℃.The wherein wt ratio does, as total amount, polyethers emulsion splitter A accounts for the 97-99.5% of total amount with polyethers emulsion splitter A and polycarboxylic acid, and polycarboxylic acid accounts for the 0.5-3% of total amount, the preferred Succinic Acid of polycarboxylic acid.In total amount, catalyst levels is 400-4000ppm, the preferred p-methyl benzenesulfonic acid of catalyzer.
Preparation final product high-performance emulsion splitter concrete steps are following:
The polyethers emulsion splitter A of step preparation and the product B of preparation are added in the reactor drum; Add solvent, heat temperature raising, controlled temperature is at 75～85 ℃; Normal pressure drips tolylene diisocyanate down; Process control temp is at 75～85 ℃, drips to finish to keep 75～85 ℃ and it was fully reacted in 1 hour, makes purpose product high-performance emulsion splitter after filtering.The wherein wt ratio does, as total amount, polyethers emulsion splitter A accounts for the 20-40% of total amount with polyethers emulsion splitter A and product B, and product B accounts for the 60-80% of total amount, solvent load be total amount 0.3-3 doubly, the tolylene diisocyanate consumption is the 0.5-6% of total amount.
The present invention at first synthesizes the polyethers emulsion splitter by aliphatic polyol; Adopt polycarboxylic acid esterification self-crosslinking then; Be dissolved in fatty alcohol type polyethers emulsion splitter and the product that adopts polycarboxylic acid esterification self-crosslinking to obtain in the solvent jointly again; Adopt the tolylene diisocyanate crosslinking reaction, obtain the oil field emulsion splitter.The high performance emulsion splitter relative molecular weight that makes is higher, and broad spectrum is good, can make the rapid breaking emulsion and dewatering of crude oil, and it is clear to deviate from water quality, and dehydrating effect is desirable.
The present invention is synthesizing polyether class emulsion splitter at first, adopts polycarboxylic acid esterification self-crosslinking then, is dissolved in polyethers emulsion splitter and the product that adopts polycarboxylic acid esterification self-crosslinking to obtain in the solvent jointly again; Adopt the tolylene diisocyanate crosslinking reaction, obtain the oil field emulsion splitter, the high performance emulsion splitter that makes; Relative molecular weight is higher, and broad spectrum is good, can make the rapid breaking emulsion and dewatering of crude oil; It is clear to deviate from water quality, and dehydrating effect is desirable.
Embodiment
Through specific embodiment the present invention is further specified below, but embodiment is not a limitation of the present invention.
A kind of oil field may further comprise the steps with the preparation method of emulsion splitter:
1. polyethers emulsion splitter A's is synthetic: 50 gram methyl alcohol and 35 gram Pottasium Hydroxide add in the reactor drum, and heat temperature raising feeds 6750 gram propylene oxides, and controlled temperature is at 115～165 ℃; Pressure maintains below the 0.6MPa, and it is fully reacted, vacuum 1 hour; Feed 3200 gram ethylene oxides again, controlled temperature is at 115～165 ℃, and pressure maintains below the 0.3MPa; And it is fully reacted, and make polyethers emulsion splitter A, subsequent use.
The aliphatics alcohols is one or more mixtures in methyl alcohol, ethanol, propyl alcohol, butanols, octadecanol, terepthaloyl moietie, Ucar 35, butyleneglycol, USP Kosher, TriMethylolPropane(TMP), the tetramethylolmethane.Present embodiment adopts methyl alcohol.
Catalyzer is one or more mixtures of Monomethylamine, n n dimetylaniline, Trimethylamine 99, Pottasium Hydroxide, sodium hydroxide, and the best is a Pottasium Hydroxide, for being convenient to use, also can catalyst dissolution be processed liquid catalyst in water.Present embodiment adopts Pottasium Hydroxide.The wherein wt ratio does, as total amount, the aliphatics alcohols accounts for the 0.2-1% of total amount in aliphatics alcohols, propylene oxide and ethylene oxide, and propylene oxide accounts for the 49-79.8% of total amount, and ethylene oxide accounts for the 20-50% of total amount.
The polyethers emulsion splitter A990 gram that 2. will 1. prepare adds in the reactor drum, adds Succinic Acid 10 grams, p-methyl benzenesulfonic acid 1.2 grams, heat temperature raising; Controlled temperature reacted vacuum 1 hour 2 hours at 85～115 ℃; Process control temp makes product B after filtering at 85～115 ℃, and is subsequent use.
Wherein catalyzer can be Witco 1298 Soft Acid or p-methyl benzenesulfonic acid, and present embodiment adopts p-methyl benzenesulfonic acid.Polycarboxylic acid can be oxalic acid, Succinic Acid or hexanodioic acid, and present embodiment adopts Succinic Acid.The wherein wt ratio does, as total amount, polyethers emulsion splitter A accounts for the 97-99.5% of total amount with polyethers emulsion splitter A and polycarboxylic acid, and polycarboxylic acid accounts for the 0.5-3% of total amount.
3. the high-performance emulsion splitter is synthetic:
The polyethers emulsion splitter A300 gram of 1. preparation and product B 700 grams of 2. preparation are added in the reactor drum; Add YLENE 1000 grams; Heat temperature raising, controlled temperature slowly drip tolylene diisocyanate 20 grams at 75～85 ℃; Drip to finish to keep 75～85 ℃ and it was fully reacted in 1 hour, make purpose product high-performance emulsion splitter after filtering.
Solvent is toluene, YLENE or kerosene, and present embodiment adopts YLENE.The wherein wt ratio does, as total amount, polyethers emulsion splitter A accounts for the 20-40% of total amount with polyethers emulsion splitter A and product B, and product B accounts for the 60-80% of total amount, solvent load be total amount 0.3-3 doubly, the tolylene diisocyanate consumption is the 0.5-6% of total amount.
The high performance emulsion splitter that makes, relative molecular weight is higher, and broad spectrum is good, can make the rapid breaking emulsion and dewatering of crude oil, and it is clear to deviate from water quality, and dehydrating effect is desirable.
Claims (5)
1. an oil field is characterized in that with the preparation method of emulsion splitter this method may further comprise the steps:
1) preparation polyethers emulsion splitter A; With the aliphatics alcohols is initiator, in the presence of basic catalyst, makes polyethers emulsion splitter A with propylene oxide and ethylene oxide reaction; The wherein wt ratio does; As total amount, the aliphatics alcohols accounts for the 0.2-1% of total amount in aliphatics alcohols, propylene oxide and ethylene oxide, and propylene oxide accounts for the 49-79.8% of total amount; Ethylene oxide accounts for the 20-50% of total amount, and the basic catalyst consumption is the 0.2-2% of total amount; The aliphatics alcohols is one or more mixtures in methyl alcohol, ethanol, propyl alcohol, butanols, octadecanol, terepthaloyl moietie, Ucar 35, butyleneglycol, USP Kosher, TriMethylolPropane(TMP), the tetramethylolmethane;
2) preparation product B; Under catalyst action, adopt polycarboxylic acid that polyethers emulsion splitter A is carried out self-crosslinking reaction, obtain product B; The wherein wt ratio does, as total amount, polyethers emulsion splitter A accounts for the 97-99.5% of total amount with polyethers emulsion splitter A and polycarboxylic acid, and polycarboxylic acid accounts for the 0.5-3% of total amount, is 400-4000ppm in the total amount catalyst levels;
3) in solvent, adopt tolylene diisocyanate to carry out self-crosslinking reaction polyethers emulsion splitter A and product B, obtain final product high-performance emulsion splitter; The wherein wt ratio does, as total amount, polyethers emulsion splitter A accounts for the 20-40% of total amount with polyethers emulsion splitter A and product B, and product B accounts for the 60-80% of total amount, solvent load be total amount 0.3-3 doubly, the tolylene diisocyanate consumption is the 0.5-6% of total amount.
2. oil field according to claim 1 is characterized in that with the preparation method of emulsion splitter: in the step 1), basic catalyst is one or more mixtures in Monomethylamine, n n dimetylaniline, Trimethylamine 99, Pottasium Hydroxide, the sodium hydroxide.
3. oil field according to claim 2 is characterized in that with the preparation method of emulsion splitter: catalyzer is the liquid catalyst that is dissolved in the water and processes.
4. oil field according to claim 1 is characterized in that: step 2 with the preparation method of emulsion splitter) in, catalyzer is Witco 1298 Soft Acid or p-methyl benzenesulfonic acid; Polycarboxylic acid is oxalic acid, Succinic Acid or hexanodioic acid.
5. oil field according to claim 1 is characterized in that with the preparation method of emulsion splitter: in the step 3), solvent is toluene, YLENE or kerosene.
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| CN104140846A (en) * | 2013-10-29 | 2014-11-12 | 中国石油化工股份有限公司 | Crude oil demulsifier and preparation method thereof |
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| CN102268282B (en) * | 2011-07-08 | 2013-08-07 | 无锡凯恩科特再生能源科技有限公司 | Broad-spectrum demulsifier and preparation method thereof |
| CN102433150B (en) * | 2011-08-03 | 2013-03-20 | 西安长庆化工集团有限公司 | Preparation method of high-flash demulsifier |
| CN102321491B (en) * | 2011-08-25 | 2013-08-28 | 句容宁武高新技术发展有限公司 | Preparation method of oilfield demulsifier by utilizing waste grease |
| CN102417594A (en) * | 2011-10-14 | 2012-04-18 | 滨州市华茂工贸有限公司 | Formula, production technology and application of condensed alcohol atactic polyether |
| EA020481B1 (en) * | 2011-11-03 | 2014-11-28 | Научно-Исследовательский И Проектный Институт Нефти И Газа (Нипинг) | Demulsifier |
| CN102807890A (en) * | 2012-08-31 | 2012-12-05 | 句容宁武高新技术发展有限公司 | Method for preparing demulsifier |
| CN105968369A (en) * | 2016-05-26 | 2016-09-28 | 句容宁武高新技术发展有限公司 | Synthetic method for low-temperature efficient demulsifier |
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| CN110591061A (en) * | 2019-08-27 | 2019-12-20 | 威尔（福建）生物有限公司 | Glycerol polyether ester for emulsifier special for pesticide and preparation method thereof |
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| CN1101238C (en) * | 1998-01-21 | 2003-02-12 | 辽河石油勘探局勘察设计研究院 | Crude de-emulsifier and its preparing process |
| RU2135527C1 (en) * | 1998-03-06 | 1999-08-27 | Закрытое акционерное общество "АТОН" | Method of preparing demulsifier to dehydrate and desalt water-oil emulsions |
| CN1570034A (en) * | 2003-07-11 | 2005-01-26 | 中国石油天然气股份有限公司 | Cross-linking type non-ionic reverse phase demulsifier and its preparation method |
| CN101643665A (en) * | 2009-08-28 | 2010-02-10 | 张振海 | Low-temperature environmental protection crude oil demulsifier |
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| CN104140846A (en) * | 2013-10-29 | 2014-11-12 | 中国石油化工股份有限公司 | Crude oil demulsifier and preparation method thereof |
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