Alkyl tetramine synthesis method, alkyl tetramine product and shale inhibitor thereof
A technology of alkyltetramine and synthesis method, which is applied in the field of oil and gas field drilling, and achieves the effects of stable and reliable technology, high yield and improved inhibition performance
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Embodiment 1
[0042] Adopt the following ratio and steps to synthesize alkyltetramines, the steps are as follows:
[0043] S1, the synthesis of amino acids
[0044] S1.1. Dissolve 0.2 mol of sodium metal in absolute ethanol, add the sodium ethoxide solution dropwise into 0.2 mol of acetamidodiethylmalonate ethanol solution, and stir at a constant speed for 1 h;
[0045] S1.2. Add 0.1 mol of 1,2-dibromoethane dropwise to the solution prepared in step S1.1, and reflux for 5.5 hours. After the reaction is completed, filter and rotary evaporate;
[0046] S1.3. Add 100 ml of 46% hydrogen bromide solution to the solution prepared in step S1.2, and reflux for 7 hours;
[0047] S1.4. Remove the hydrogen bromide solution in the solution obtained in S1.3 by rotary evaporation, dissolve the crude product in ethanol, then add 55% ethanol pyridine solution according to the volume ratio, let stand for 12 hours, and filter with suction;
[0048] S2, esterification reaction
[0049] S2.1. Take 5 mmol of...
Embodiment 2
[0063] Adopt the following ratio and steps to synthesize alkyltetramines, the steps are as follows:
[0064] S1, the synthesis of amino acids
[0065] S1.1. Dissolve 0.21 mol of sodium metal in absolute ethanol, add the sodium ethoxide solution dropwise to 0.2 mol of acetamidodiethyl malonate in ethanol, and stir at a constant speed for 1.5 h;
[0066] S1.2. Add 0.11 mol of 1,3-dibromopropane dropwise to the solution prepared in step S1.1, and reflux for 7 hours. After the reaction is completed, filter and rotary evaporate;
[0067] S1.3. Add 100 ml of 49% hydrogen bromide solution to the solution prepared in step S1.2, and reflux for 8 hours;
[0068] S1.4. Remove the hydrogen bromide solution in the solution prepared in S1.3 by rotary evaporation, dissolve the crude product in ethanol, then add 65% ethanol pyridine solution according to the volume ratio, let stand for 12 hours, and filter with suction;
[0069] S2, esterification reaction
[0070] S2.1. Take 5 mmol of the...
Embodiment 3
[0084] Adopt the following ratio and steps to synthesize alkyltetramines, the steps are as follows:
[0085] S1, the synthesis of amino acids
[0086] S1.1. Dissolve 0.202 mol of sodium metal in absolute ethanol, add the sodium ethoxide solution dropwise to 0.2 mol of acetamidodiethyl malonate in ethanol, and stir at a constant speed for 1 hour;
[0087] S1.2. Add 0.105 mol of 1,4-dibromobutane dropwise to the solution prepared in step S1.1, and reflux for 6 hours. After the reaction is completed, filter and rotary evaporate;
[0088] S1.3. Add 100 ml of 48% hydrogen bromide solution to the solution prepared in step S1.2, and reflux for 7 hours;
[0089] S1.4. Remove the hydrogen bromide solution in the solution obtained in S1.3 by rotary evaporation, dissolve the crude product in ethanol, then add 60% ethanol pyridine solution according to the volume ratio, let stand for 12h, and filter with suction ;
[0090] S2, esterification reaction
[0091] S2.1. Take 5 mmol of the ...
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