Allene type acid fracturing corrosion inhibitor and preparation method thereof
A technology of corrosion inhibitor and allene, which is applied in the field of allene type acid pressure corrosion inhibitor and its preparation, can solve the problems such as no reports of allene type acid pressure corrosion inhibitor, achieve good corrosion inhibition effect, increase hydrogen evolution Resistance, the effect of reducing the corrosion rate
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Embodiment 1
[0030] Example 1: Preparation of 2-hydroxymethyl-4-phenyl-2,3-dienebutanol
[0031] (1) Dissolve 10mmol of phenylacetyl chloride in 50mL of tetrahydrofuran at 0°C, add 13mmol of triethylamine and 15mmol of 3-acetoxy-2-triphenylphosphine ylide propionate in sequence, stir well, and react at room temperature for 12 hours , the system was concentrated and then separated by column chromatography to obtain 2.1 g of the intermediate product 2-acetoxymethyl-4-phenyl-2,3-dienebutanoic acid methyl ester with a yield of 85%.
[0032](2) Dissolve 6.0mmol of the intermediate product 2-acetoxymethyl-4-phenyl-2,3-dienebutanoic acid methyl ester in 60mL of toluene, and add 22mmol of diisobutylaluminum hydride solution dropwise at 0°C (1M hexane), 15min was added dropwise, warmed up to room temperature and reacted for 6h, sequentially added 60mL saturated potassium sodium tartrate aqueous solution and 50mL water, stirred for 30min, separated the water phase, extracted twice with 50mL diethyl ...
Embodiment 2
[0033] Example 2: Preparation of 2-hydroxymethyl-4-phenyl-2,3-diene N-methylbutylamine
[0034] (1) Dissolve 10mmol of phenylacetyl chloride in 50mL of tetrahydrofuran at 0°C, add 15mmol of triethylamine and 13mmol of 3-acetoxy-2-triphenylphosphine ylide N-methylpropionamide in turn, stir well, and react at room temperature After 12 hours, the system was concentrated and separated by column chromatography to obtain 1.91 g of the intermediate product 2-acetoxymethyl-4-phenyl-2,3-diene N-methylbutanamide, with a yield of 78%;
[0035] (2) Dissolve 5.0mmol of the intermediate product 2-acetoxymethyl-4-phenyl-2,3-diene N-methylbutyramide in 50mL of toluene, and add 12.5mmol of diisobutyl Aluminum hydride solution (1M hexane), 10-15min to complete dropwise, warm up to room temperature and react for 4-6h, add 50mL saturated potassium sodium tartrate aqueous solution and 50mL water successively, stir for 30min, separate the water phase, and extract twice with 30mL ether , the organi...
Embodiment 3
[0037] The allene type compound 2-hydroxymethyl-4-phenyl-2,3-diene butanol prepared in Example 1 was dissolved in ethanol, and configured as a solution with a mass concentration of 30wt%, and then adding a mass concentration of Allene type acid pressure corrosion inhibitor A is prepared as a mixed synergist of 20 wt% propynyl alcohol and 5 wt% antimony trioxide.
[0038] Take the allene type acid pressure corrosion inhibitor A prepared above, and use "SY / T5405-1996 Corrosion Inhibitor Performance Test Method and Evaluation Index for Acidification" to evaluate its appearance and compatibility. The results are shown in Table 1.
[0039] The corrosion inhibition performance of the acid pressure corrosion inhibitor prepared above was evaluated (see Table 2 for the evaluation conditions), and the results are shown in Table 2.
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