CN102363886A - Preparation of corrosion inhibitor for oil field reinjection water - Google Patents
Preparation of corrosion inhibitor for oil field reinjection water Download PDFInfo
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- CN102363886A CN102363886A CN2010105862571A CN201010586257A CN102363886A CN 102363886 A CN102363886 A CN 102363886A CN 2010105862571 A CN2010105862571 A CN 2010105862571A CN 201010586257 A CN201010586257 A CN 201010586257A CN 102363886 A CN102363886 A CN 102363886A
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Abstract
The invention discloses preparation of a corrosion inhibitor for oil field reinjection water. Raw materials consist of the following components in parts by weight: 70-80 parts of 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA), 5-10 parts of alkynol, 0.5-1.0 part of potassium iodide and 10-20 parts of propanol or ethanol. The preparation comprises the following steps of: adding the 2-phosphonobutane-1,2,4-tricarboxylic acid and the alkynol into a reactor in sequence; magnetically stirring at normal temperature and under normal pressure and adding the potassium iodide after mixture is uniform; adding isopropyl alcohol or ethanol solvent after complete reaction; and continuously reacting for 20-30 minutes to obtain a corrosion inhibitor finished product. The PBTCA is prepared by the following steps of: adding 20 parts of dialkyl phosphite, 20 parts of dialkyl maleate and 10 parts of acrylate into a reactor in sequence and stirring; adding 10 parts of NaOH to stir after color of solution becomes transparent; and reacting for 20 minutes to obtain a finished product of the PBTCA, wherein the yield is 87.7 percent; the acid value of the product is less than 5.0mg/L, and the pH value is 0-2.0; and when the concentration of the agent is 50mg/L, the corrosion inhibition performance is higher.
Description
Technical field
The present invention relates to sanitas, be specially adapted to the anticorrosion of oilfield sewage pipeline, waterflood-transmission line and injection well tubing surface through selected inhibiter.
Background technology
Corrosion is the material destruction of under various environmental activities, taking place and rotten, and especially the metal problem spreads all over each department of national economy and national defense construction, has caused tremendous loss to country.Add up according to investigations, account for the 2%-4% of the national economy output value owing to the financial loss that metallic corrosion causes every year.The annual at present Direct Loss that cause because of corrosion of China account for 2% of the gross output value of industry and agriculture.
The harm of metallic corrosion is not in the loss of metal itself but the destruction of its goods.In industrial production, outstanding
It is in the Chemical Manufacture, because equipment corrosion damages, phenomenons such as run, drip, leak takes place, and contaminate environment worsens labor condition, and the harm health of human body influences quality product, even causes the accident, and its loss is unable to estimate especially.The importance of research anticorrosive metal problem is conspicuous.
Literature search discloses: (1) " Huadong Chemical College journal " is about " research of organic phosphoric acid carboxylic acid type water quality stabilizer ", and having disclosed organophosphorus is the application of water stabilizer under various condition of water quality; (2) number be the patent of CN00109688.5 " a kind of oil field reinjection water inhibiter ", having disclosed tetrahydroglyoxaline is the application of re-injection water inhibiter aspect oil field reinjection water; (3) number be the patent of 2004100256207 " high-efficient corrosion inhibitors ", disclosed the effect of inhibiter monomer after composite.
In sum: this research is to have abandoned single in the past use imidazolines re-injection water corrosion inhibitor formula with the difference of foregoing invention, and the science preparation of enforcement promptly is beneficial to production simply again, and result of use is superior to like product.
Summary of the invention
The objective of the invention is: the product that provides is specially adapted to the oil field reinjection water system, and the most outstanding advantage is under comparatively complicated water quality situation, anti-preferably corrosion mitigating effect to be arranged.
The objective of the invention is to realize like this: a kind of oil field reinjection water is with the preparation of inhibiter; Raw material is prepared with weight part; By 70-80 part 2-phosphate-1,2,4-tri carboxyl butane (PBTCA), 5-10 part alkynol, 0.5-1.0 part potassiumiodide, 10-20 part propyl alcohol or ethanol are formed; Through preparing: with 2-phosphate-1,2,4-tri carboxyl butane, alkynol add reactor drum successively; Through magnetic agitation, evenly the back adds potassiumiodide at normal temperatures and pressures, and question response adds Virahol or alcohol solvent fully; Continue reaction 20-30min again, promptly get the inhibiter finished product;
2-phosphate-1,2 wherein, 4-tri carboxyl butane synthetic chemical structure of general formula is:
Its PBTCA preparation: with 20 parts of dialkyl phosphites, 20 parts of maleic acid dialkyls, alkyl acrylate adds reactor drum successively for 10 parts and stirs; When treating that solution colour is transparence, the NaOH that adds 10 parts stirs, behind the reaction 20min; Promptly get its finished product, production yield rate is 87.7%.
The preparation of said inhibiter, the acid number of this product is lower than 5.0mg/L, and the pH value is 0-2.0; The concentration of agent is when 50mg/L, and corrosion inhibition is better.
Raw material that the preparation of said inhibiter, product are selected for use and preparation 2-phosphate-1,2, the raw material of 4-tri carboxyl butane is the commercially available prod.
The present invention is a raw material for 10 parts with dialkyl phosphites, maleic acid dialkyl, alkyl acrylate, through catalyzed reaction, and the 2-phosphate-1 that is obtained; 2,4-tri carboxyl butane (PBTCA) raw material, the inhibiter that is used to produce; Make product be more suitable in time under the effect of low usage quantity, also realizing control to re-injection aqueous corrosion property high temperature, high hard, high-alkali reaching in the high concentration multiple operation; It is big, alkaline big to have solved water hardness simultaneously; Cl ions and sulfate ion increase fast, and water quality drawback rambunctious shows technical progress.
Embodiment
Below in conjunction with embodiment the present invention is described further.
Embodiment 1
(1) preparation: with 2-phosphate-1,2,70 parts of 4-tri carboxyl butanes, alkynol add reactor drum for 6 parts; Through magnetic agitation, evenly the back adds 0.7 part of potassiumiodide at normal temperatures and pressures, and question response is complete; Add 15 parts of alcohol solvents, continue reaction 30min again, promptly get the inhibiter finished product; Its PBTCA preparation: with 20 parts of dialkyl phosphites, 20 parts of maleic acid dialkyls, alkyl acrylate adds reactor drum successively for 10 parts and stirs; When treating that solution colour is transparence, the NaOH that adds 10 parts stirs, behind the reaction 20min; Promptly get its finished product, production yield rate is 87.7%.
(2) use: above-mentioned inhibiter is mixed with the aqueous solution of 1% concentration, detects its corrosion inhibition and see table 1.
Learnt by last table: density of corrosion inhibitor is when 50mg/L, and corrosion inhibition is better, can satisfy the requirement of oil field reinjection water inhibition.
Embodiment 2
(1) preparation: 2-phosphate-1,2,4-tri carboxyl butane 80g, alkynol 10g, iodide 0.5g, Virahol 10.0g; Having under the rotor magnetic whisking appliance, stirring slowly adding above-mentioned substance, at room temperature reacting 28min, promptly getting the inhibiter finished product; Its PBTCA preparation: with 20 parts of dialkyl phosphites, 20 parts of maleic acid dialkyls, alkyl acrylate adds reactor drum successively for 10 parts and stirs; When treating that solution colour is transparence, the NaOH that adds 10 parts stirs, behind the reaction 20min; Promptly get its finished product, production yield rate is 87.7%.
(2) use: above-mentioned inhibiter is mixed with the aqueous solution of 1% concentration, detects its corrosion inhibition and see table 2.
Learnt by last table: density of corrosion inhibitor is when 50mg/L, and corrosion inhibition is better, can satisfy the inhibition requirement of oil field reinjection water.
Claims (3)
1. an oil field reinjection water is with the preparation of inhibiter, and it is characterized in that: raw material is prepared with weight part, and by 70-80 part 2-phosphate-1,2,4-tri carboxyl butane (PBTCA), 5-10 part alkynol, 0.5-1.0 part potassiumiodide, 10-20 part propyl alcohol or ethanol are formed; Through preparing: with 2-phosphate-1,2,4-tri carboxyl butane, alkynol add reactor drum successively; Through magnetic agitation, evenly the back adds potassiumiodide at normal temperatures and pressures, and question response adds Virahol or alcohol solvent fully; Continue reaction 20-30min again, promptly get the inhibiter finished product;
2-phosphate-1,2 wherein, 4-tri carboxyl butane synthetic chemical structure of general formula is:
Its PBTCA preparation: with 20 parts of dialkyl phosphites, 20 parts of maleic acid dialkyls, alkyl acrylate adds reactor drum successively for 10 parts and stirs; When treating that solution colour is transparence, the NaOH that adds 10 parts stirs, behind the reaction 20min; Promptly get its finished product, production yield rate is 87.7%.
2. according to the preparation of the said inhibiter of claim 1, it is characterized in that: the acid number of this product is lower than 5.0mg/L, and the pH value is 0-2.0; The concentration of agent is when 50mg/L, and corrosion inhibition is better.
3. according to the preparation of the said inhibiter of claim 1, it is characterized in that: raw material that product is selected for use and preparation 2-phosphate-1,2, the raw material of 4-tri carboxyl butane is the commercially available prod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105862571A CN102363886A (en) | 2010-12-14 | 2010-12-14 | Preparation of corrosion inhibitor for oil field reinjection water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105862571A CN102363886A (en) | 2010-12-14 | 2010-12-14 | Preparation of corrosion inhibitor for oil field reinjection water |
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| Publication Number | Publication Date |
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| CN102363886A true CN102363886A (en) | 2012-02-29 |
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| CN2010105862571A Pending CN102363886A (en) | 2010-12-14 | 2010-12-14 | Preparation of corrosion inhibitor for oil field reinjection water |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1277241A (en) * | 2000-06-21 | 2000-12-20 | 中国石油天然气总公司石油管材研究所 | Water injecting corrosion inhibitor for oil field |
| CN101805597A (en) * | 2010-03-11 | 2010-08-18 | 中国石油集团川庆钻探工程有限公司 | Solid corrosion and scale inhibitor for oil field |
| CN102226081A (en) * | 2011-04-19 | 2011-10-26 | 中国海洋石油总公司 | High-temperature acidic corrosion inhibitor and preparation method thereof |
-
2010
- 2010-12-14 CN CN2010105862571A patent/CN102363886A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1277241A (en) * | 2000-06-21 | 2000-12-20 | 中国石油天然气总公司石油管材研究所 | Water injecting corrosion inhibitor for oil field |
| CN101805597A (en) * | 2010-03-11 | 2010-08-18 | 中国石油集团川庆钻探工程有限公司 | Solid corrosion and scale inhibitor for oil field |
| CN102226081A (en) * | 2011-04-19 | 2011-10-26 | 中国海洋石油总公司 | High-temperature acidic corrosion inhibitor and preparation method thereof |
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Application publication date: 20120229 |