Acidic oil extraction medium corrosion inhibitor

A technology of corrosion inhibitor and mass ratio, applied in the field of acid oil production medium corrosion inhibitor, can solve the problems of high price, low yield and difficult preparation, and achieve the effect of meeting the requirements of corrosion resistance

Inactive Publication Date: 2014-05-21
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a corrosion inhibitor with low price, environmental protection and safety, and good corrosion inhibition effect, so as to overcome the difficulties in preparation, low yield, high price, environmental protection and safety in the industrial application process of corrosion inhibitors in oil production environment The problem;

Method used

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  • Acidic oil extraction medium corrosion inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: Research on the corrosion inhibition performance of different corrosion inhibitors

[0019] (1) Turn on the constant temperature water bath and set the temperature of the water bath to 80°C;

[0020] (2) First number 7 N80 steel sheets 1, 2, 3, 4, 5, 6, 7, and then put them all into a 100ml beaker, pour 100ml petroleum ether into the beaker, and soak the N80 steel sheets for 10 minutes , after taking it out, wipe off the dirt on the surface, dry it at 30°C, weigh it three times, and calculate the average value;

[0021] (3) Put the above-mentioned treated N80 steel sheets into 7 conical flasks respectively, add 70ml of ammonium persulfate solution with a mass fraction of 8% in each conical flask, and then add 0.500g of imidazoline, 0.400g of sulfur Add urea, 0.100g hexamethylenetetramine, 0.050g potassium dichromate, 0.050g sodium nitrite, 0.500g sodium hydroxide and 0.500g urea to Erlenmeyer flasks No. 1, 2, 3, 4, 5 and 6 respectively , No. 7 as a blank...

Embodiment 2

[0026] Example 2: Research on corrosion inhibition performance of different proportioning corrosion inhibitors

[0027] (1) Turn on the constant temperature water bath and set the temperature of the water bath to 80°C;

[0028] (2) First, take out 7 pieces of N80 steel sheets numbered 1, 2, 3, 4, 5, 6, 7, and then put them all into a 100ml beaker, pour 100ml of petroleum ether into the beaker, soak the N80 steel sheets for 10 After taking it out, wipe off the dirt on the surface, dry it at 30°C, weigh it three times, and calculate the average value;

[0029] (3) Put the above-mentioned treated N80 steel sheets into 7 Erlenmeyer flasks respectively, add 70ml of ammonium persulfate solution with a mass fraction of 8% in each Erlenmeyer flask respectively, then add 0.500g thiourea, 0.450g sulfur Urea and 0.050g hexamethylenetetramine, 0.400g thiourea and 0.100g hexamethylenetetramine, 0.350g thiourea and 0.150g hexamethylenetetramine, 0.300g thiourea and 0.200g hexamethylenetetr...

Embodiment 3

[0034] Embodiment 3: Research on the corrosion inhibition performance of corrosion inhibitors with different additions

[0035] (1) Turn on the constant temperature water bath and set the temperature of the water bath to 80°C;

[0036] (2) First, take out 7 pieces of N80 steel sheets numbered 1, 2, 3, 4, 5, 6, 7, and then put them all into a 100ml beaker, pour 100ml of petroleum ether into the beaker, soak the N80 steel sheets for 10 After taking it out, wipe off the dirt on the surface, dry it at 30°C, weigh it three times, and calculate the average value;

[0037] (3) the above-mentioned processed N80 steel sheets are put into 7 conical flasks respectively, add the ammonium persulfate solution of 70ml mass fraction 8% in each conical flask respectively, then 2.400g thiourea and 0.600g six Methylenetetramine, 0.800g thiourea and 0.200g hexamethylenetetramine, 0.560g thiourea and 0.140g hexamethylenetetramine, 0.400g thiourea and 0.100 hexamethylenetetramine, 0.320g sulfur U...

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Abstract

The invention discloses an acidic oil extraction medium corrosion inhibitor, which contains thiourea and hexamethylenetetramine, wherein the mass ratio of thiourea to hexamethylenetetramine is 1:4-10:1. The acidic oil extraction medium corrosion inhibitor disclosed by the invention is high in corrosion inhibition, especially applicable to the corrosion prevention of N80 steel in an acidic oil extraction medium, namely, an ammonium persulfate solution, in an oilfield, wherein the mass concentration of ammonium persulfate is 2-10% (wt.), and the corrosion temperature is set at 10-80 DEG C; the acidic oil extraction medium corrosion inhibitor is low in toxicity, and especially suitable for the occasions with high environmental requirements.

Description

technical field [0001] The invention relates to a corrosion inhibitor for acidic oil recovery medium. Background technique [0002] In order to ensure high-efficiency oil recovery, industrial oil recovery equipment is operating in the ammonium persulfate solution environment for a long time. At present, most of the corrosion inhibitors used in ammonium persulfate system in oil production enterprises are imidazoline or strong oxidizing corrosion inhibitors. Among them, the imidazoline corrosion inhibitor is obtained by the condensation reaction of organic acid and polyethylene polyamine in organic solution. The preparation process of this type of corrosion inhibitor is complicated, the yield is low, the price is expensive, and the corrosion inhibition effect of the corrosion inhibitor Generally (the corrosion inhibition rate of N80 steel is about 93.32%), it cannot be used in places with strict anti-corrosion requirements for equipment; the other type belongs to corrosion in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/04
CPCC23F11/04
Inventor 王玉琪邹永强袁伟健郑岚姚瑞清
Owner NORTHWEST UNIV
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