CN106435598A - Prescription and production process of metal corrosion inhibitor added with fluorine-containing surfactant - Google Patents
Prescription and production process of metal corrosion inhibitor added with fluorine-containing surfactant Download PDFInfo
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- CN106435598A CN106435598A CN201510474708.5A CN201510474708A CN106435598A CN 106435598 A CN106435598 A CN 106435598A CN 201510474708 A CN201510474708 A CN 201510474708A CN 106435598 A CN106435598 A CN 106435598A
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Abstract
The invention provides a prescription and a production process of a metal corrosion inhibitor added with a fluorine-containing surfactant. The prescription of the metal corrosion inhibitor comprises the following components in percentage by weight: 20% to 25% of fluorine-containing octylic imidazoline, 5% to 8% of hexamethylenetetramine, 5% of propargyl alcohol and the balance water. The production process comprises the following steps: adding the octylic imidazoline and triethylamine in a reaction kettle according to a proportion, slowly heating to the temperature of 55 DEG C, and stirring at a constant temperature; dropwise adding the fluorine-containing surfactant into the reaction kettle according to a proportion, performing constant-temperature stirring for 20 h after the fluorine-containing surfactant is added, ending the reaction to obtain the fluorine-containing octylic imidazoline, and sampling for inspection; and adding the fluorine-containing octylic imidazoline, the hexamethylenetetramine, the propargyl alcohol and the water into the reaction kettle according to a proportion, heating to the temperature of 45 DEG C, stirring for 2 h until a uniform solution is obtained, and naturally cooling to obtain a final product, wherein the final product is a metal corrosion inhibitor which has high temperature resistance and is added with the fluorine-containing surfactant. The metal corrosion inhibitor has the characteristics of being simple in production process, nontoxic, harmless, safe, environmentally friendly, larger than 90% in corrosion inhibition rate under a temperature of 150 DEG C, and applicable to corrosion prevention of a high-temperature oil well.
Description
Technical field
The present invention relates to oilfield chemistry technical field of anticorrosion, especially a kind of metal inhibitor formula and processing technology adding fluorine-containing surfactant.
Background technology
Seriously corroded has influence on the normal exploitation in oil field, shortens the service life of oil field equipment and gathering line, causes down-hole and ground installation pipeline or even Oil/gas Well to stop production or scrap.Strengthen the corrosion and protection research in this field, huge economic loss can be avoided.The use condition of oil field equipment is mainly carrying and environment, carries the chemical property of fluid, harsh use environment, makes corrosion become topmost failure mode.The corrosive medium of oilfield exploitation is mainly the H under high-temperature and high-pressure conditions2S、CO2、O2、Cl-, microorganism, water etc..With increasingly sharpening of oil field development system corrosion condition, oil extraction in oil field, gathering system have been done step-by-step and have commonly used corrosion inhibiter.With the raising of oilfield exploitation technology, the exploitation of Temperature Deep well has become trend.The fluid temperature (F.T.) having a lot of high temperature wells reaches 150 DEG C, now uses up to 100 DEG C of corrosion inhibiter heat resistance, when 150 DEG C, substantially loses corrosion inhibition.For the corrosion of oil field equipment pipeline under 150 DEG C of high-temperature conditions of effective control, the hardware from source is to the condition of high temperature protects, and improves service life, has carried out research and the application of this project.
Content of the invention
It is an object of the invention to provide a kind of metal inhibitor formula and processing technology adding fluorine-containing surfactant, make hardware facility under 150 DEG C of high-temperature conditions, corrosion inhibition can be kept, metal is effectively protected, increase the maintenance of equipment cycle, improve service life of equipment.Because fluorine is that in all elements, electronegativity is maximum, and Van der Waals atomic radius is minimum in addition to hydrogen, and atomic polarizability is minimum again, the singly-bound that the singly-bound that fluorine atom is formed is formed with other atoms than carbon atom is good for can be big, strong length, leads to fluorine-containing surfactant to have higher heat stability and high chemical stability.It is added in metal inhibitor, corrosion inhibition rate can be kept to be more than 90%, reach preferable resistance to elevated temperatures at 150 DEG C.
The technical solution adopted in the present invention is：
Add the formula of the metal inhibitor of fluorine-containing surfactant, the percentage by weight proportioning of its each component is：Fluorine-containing octanoic acid imidazoline 20%～25%, hexamethylenetetramine 5%～8%, propilolic alcohol 5%, remaining is water.
Wherein, synthesis each component molar ratio of fluorine-containing octanoic acid imidazoline is：Sad imidazoline：Fluorine-containing surfactant：Triethylamine=1:0.6:0.4.
Production technology of the present invention is：
（1）, sad imidazoline, triethylamine are proportionally added in reactor, be to slowly warm up to 55 DEG C, constant temperature stir；
（2）, in proportion toward Deca fluorine-containing surfactant in reactor, after completion of dropping, constant temperature stir 20 hours, terminate reaction, obtain fluorine-containing octanoic acid imidazoline, pick test；
（3）, above-mentioned fluorine-containing octanoic acid imidazoline, hexamethylenetetramine, propilolic alcohol, water are proportionally put in reactor, it is warming up to 45 DEG C, to homogeneous solution, Temperature fall, final product is a kind of metal inhibitor of addition fluorine-containing surfactant with high temperature resistant property within 2 hours for stirring.
Main physico-chemical parameter according to the fluorine-containing metal inhibitor of the high temperature resistance of this technique gained（See Fig. 1）.
Fluorine-containing octanoic acid imidazoline synthetic reaction equation（See Fig. 2）.
Compared with prior art, it is characteristic of the invention that：
（1）, due to synthesized fluorine-containing octanoic acid imidazoline, this metal inhibitor outstanding feature is exactly temperature tolerance, and under 150 DEG C of environment, corrosion inhibition rate can reach more than 90%, and the corrosion inhibition rate when 150 DEG C for the common metal corrosion inhibiter can only achieve 20%；
（2）, this metal inhibitor be Compositional type medicament, synergism can be produced, have inhibition, antiscale, sterilization multi-effect, one multipotency；
（3）, this metal inhibitor can form the layer adsorbed film of stable densification, tightly stick to metal surface, effective protection metal surface, effectively protection cycle are long；
（4）, simple production process, yield height, low cost, degradable, Nonpoisonous, non-environmental-pollution safety and environmental protection, easy to use；
（5）, to highly corrosive, high salinity liquid, there is significant corrosion mitigating effect, conventional corrosion inhibiter is better than to temperature, salinity, acid adaptability；
（6）, be applied to Temperature Deep well equipment installation protection, be the preferable aseptic production of oil field high temperature well development.
Brief description
Fig. 1 is the main physico-chemical parameter figure of corrosion inhibiter of the present invention；
Fig. 2 is the present invention fluorine-containing octanoic acid imidazoline synthetic reaction equation figure.
Specific embodiment
1. static metal hanging slice test：
Lacing film is processed with reference to China PetroChemical Corporation's company standard Q/SHCG40-2012《Oil field produced water process inhibiter technology requires》.Add people's corrosion inhibiter in corrosion system, put into lacing film, calculate corrosion rate and corrosion inhibition rate.
Experimental condition：150 DEG C, 7 days lacing film time, adding consistency 30ppm.
Result：Fluorine-containing metal inhibitor shows preferable corrosion mitigating effect, corrosion rate 0.0275mm/a, corrosion inhibition rate 92%.
2. compatibility test
And antisludging agent compatibility (1)：The fluorine-containing metal inhibitor of 30ppm and antisludging agent are added separately in corrosive medium, to determine that fluorine-containing metal inhibitor has or not the effect offsetting each inorganic agent effect and each inorganic agent has or not the effect offsetting fluorine-containing metal inhibitor effect.Scale inhibition performance evaluation adopts China PetroChemical Corporation company standard Q/SH 0356-2010《Oil field extracted water scale preventative technical requirements》.
Result：When adding fluorine-containing metal inhibitor, scale inhibition performance increases by 5%.This shows that fluorine-containing metal inhibitor does not affect, in the scale inhibition effect with antisludging agent, to have synergy with antisludging agent simultaneously, enhance scale inhibition effect.
And demulsifier compatibility (2)：50mL corrosive medium and 49mL corrosive medium and the fluorine-containing metal inhibitor of 1mL is added respectively in the color-comparison tube of 2 50mL, be separately added into again 100ppm scene demulsifier, vibration 100 times, standing 1min, 3min, observe the situation of oil phase, aqueous phase and oil-water interfaces after 5min, 10min and read corresponding volume.
Result：After adding fluorine-containing metal inhibitor, water yield keeps constant, does not affect demulsifier effect, does not produce emulsion layer.Show that this product does not interfere with crude oil demulsification.
Scene application result：This medicament is widely used in Shengli Oil Field, Changqing oilfields, TulufanHami oil field, system in Tahe Oilfield, is made that outstanding contribution for sleeve in oil field, the anti-corrosion of oil pipe, has ensured that the pipeline of frequent perforation normally runs, and obtains the consistent favorable comment of user.Application example：, typically all more than 3000 meters, up to 150 DEG C, sulfide hydrogen, carbon dioxide Mole percent are higher simultaneously for wellbore fluids temperature, and this fluorine-containing metal inhibitor employs 1 year in TulufanHami oil field for the oil well of TulufanHami oil field（2014.2-2015.2）, high-temperature oil well sleeve pipe and profit feed-line do not have corrosion failure phenomenon, the stop production to overhaul event causing because of corrosion yet, and the production of site technique system keeps stable, and corrosion inhibition rate is up to 90.0%.This absolutely proves the efficiency and applicability of this fluorine-containing metal inhibitor evaluation methodology, also indicates that this fluorine-containing metal inhibitor is highly effective to the corrosion protection of high-temperature oil well simultaneously, can meet the protection needs of oil field high temperature well installations and facilities.
Claims (3)
1. a kind of add fluorine-containing surfactant metal inhibitor formula and processing technology it is characterised in that：The percentage by weight of each component is：Fluorine-containing octanoic acid imidazoline 20%～25%, hexamethylenetetramine 5%～8%, propilolic alcohol 5%, remaining is water, and synthesis each component molar ratio of fluorine-containing octanoic acid imidazoline is：Sad imidazoline：Fluorine-containing surfactant：Triethylamine=1:0.6:0.4.
2. according to claim 1 a kind of add fluorine-containing surfactant metal inhibitor formula and processing technology it is characterised in that：Its production technology is：
（1）, sad imidazoline, triethylamine are proportionally added in reactor, be to slowly warm up to 55 DEG C, constant temperature stir；
（2）, in proportion toward Deca fluorine-containing surfactant in reactor, after completion of dropping, constant temperature stir 20 hours, terminate reaction, obtain fluorine-containing octanoic acid imidazoline, pick test；
（3）, above-mentioned fluorine-containing octanoic acid imidazoline, hexamethylenetetramine, propilolic alcohol, water are proportionally put in reactor, it is warming up to 45 DEG C, to homogeneous solution, Temperature fall, final product is a kind of metal inhibitor of addition fluorine-containing surfactant with high temperature resistant property within 2 hours for stirring.
3. according to claim 1 and 2 a kind of add fluorine-containing surfactant metal inhibitor formula and processing technology it is characterised in that：Add fluorine-containing octanoic acid imidazoline.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110042398A (en) * | 2019-05-29 | 2019-07-23 | 中国石油化工股份有限公司 | Imidazoline high temperature resistant corrosion inhibitor and preparation method thereof |
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| WO2011143358A2 (en) * | 2010-05-12 | 2011-11-17 | Jsk Capital Llc | Method for lowering ph using urea sulfate in the presence of corrosion inhibitor |
| CN102732891A (en) * | 2011-03-31 | 2012-10-17 | 武汉润尔华科技有限公司 | Neutral corrosion inhibitor |
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Patent Citations (5)
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| 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 |
| CN101705492A (en) * | 2009-11-16 | 2010-05-12 | 南通飞拓生物科技有限公司 | Steel hydrochloric acid pickling corrosion inhibitor |
| WO2011143358A2 (en) * | 2010-05-12 | 2011-11-17 | Jsk Capital Llc | Method for lowering ph using urea sulfate in the presence of corrosion inhibitor |
| CN102732891A (en) * | 2011-03-31 | 2012-10-17 | 武汉润尔华科技有限公司 | Neutral corrosion inhibitor |
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| CN110042398A (en) * | 2019-05-29 | 2019-07-23 | 中国石油化工股份有限公司 | Imidazoline high temperature resistant corrosion inhibitor and preparation method thereof |
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