H2S corrosion resistant ground gathering system corrosion inhibitor and preparation method thereof
A technology for gathering and transportation systems and corrosion inhibitors. It is applied in the protection of metal materials and the field of corrosion inhibitors for ground gathering and transportation systems. It can solve problems such as easy hydrolysis, short validity period, and unpleasant smell, and achieve less dosage and uniform adsorption film. Dense, easy and quick results to produce
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Embodiment 1
[0021] The preparation of the corrosion inhibitor is divided into two steps: the first step is the synthesis of the main agent N-benzyl-N'-phenylpiperazine, and the second step is the preparation of the corrosion inhibitor.
[0022] Pour N-phenylpiperazine and benzyl chloride into a three-necked flask at a molar ratio of 1.3:1, stir and mix uniformly, heat up to 170°C, keep warm and react for 8 hours to obtain N-benzyl-N′-phenylpiper Azine.
[0023] Then the mass percentage of 40% N-benzyl-N'-phenylpiperazine, 7% methoxypropylamine, 7% hydroxyethylene diphosphate, 7% monomethylamine, 7% trimethyl Amine, 8% octylphenol polyoxyethylene ether, 24% dimethylformamide are mixed and stirred evenly to prepare an inhibitor of H 2 S is a corrosion inhibitor for ground gathering and transportation pipelines, code-named TG530-Z I.
[0024] In order to test the corrosion inhibitor-TG530-Z I vs. H 2 The protection effect of S corrosion is evaluated by using the high temperature autoclave produced...
Embodiment 2
[0035] Pour N-phenylpiperazine and benzyl chloride into a three-necked flask with a molar ratio of 1.3:1, stir and mix uniformly, heat up to 140°C, keep warm and react for 8 hours; then add 20% N-benzyl chloride by mass -N'-phenylpiperazine, 10% methoxypropylamine, 7.5% hydroxyethylene diphosphate, 7% dimethylamine, 7% trimethylamine, 7% octylphenol polyoxyethylene Ether, 10% dimethylformamide and 31.5% methanol are mixed and stirred evenly to prepare an inhibitor of H 2 S is a corrosion inhibitor for ground gathering pipelines, code-named TG530-Z II.
[0036] Through the high temperature and high pressure test, the working conditions of Table 1 and Table 2 in Example 1 are simulated. Under the condition of the test period of 7 days, when the amount of corrosion inhibitor -TG530-Z II is 100mg / L, the corrosion rate is It is 0.0831mm / a, and the corrosion inhibition rate reaches 90.82%.
[0037] Macro photo of specimen corrosion figure 1 , figure 2 It can be seen from the comparison...
Embodiment 3
[0039] First, the preparation of N-benzyl-N'-phenylpiperazine is carried out. Pour N-phenylpiperazine and benzyl chloride into a three-necked flask at a molar ratio of 1.3:1, stir and mix uniformly, heat up to 140°C, keep warm and react for 8 hours.
[0040] Then, the mass percentage of 40% N-benzyl-N'-phenylpiperazine, 10% methoxypropylamine, 7% hydroxyethylene diphosphate, 7% monomethylamine, 7% Ethylene oxide condensate, 10% dimethylformamide and 19% methanol are mixed and stirred evenly to obtain an inhibitory H 2 S is a corrosion inhibitor for ground gathering and transportation pipelines, code-named TG530-Z III.
[0041] Through the high temperature and high pressure simulation test, the corrosion rate of coupons with corrosion inhibitor-TG530-Z III is shown in Table 4.
[0042] Table 4 Corrosion rate under different amounts of corrosion inhibitor
[0043] Dosage of corrosion inhibitor, mg / L Corrosion rate, mm / a Corrosion inhibition rate,% 0 0.9052 / 50 0.0799 91.1...
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