Hydrate inhibitor and its application
A hydrate inhibitor and inhibitor technology, which is applied in drilling compositions, chemical instruments and methods, pipeline systems, etc., can solve the problems of high cost, large amount of consumption, and environmental pollution, so as to reduce consumption and reduce environmental pollution. Harm, cost reduction effect
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[0037] According to a preferred embodiment of the method of the present invention, the mixing method is as follows: under the condition of a water bath, dimethylalkylamine is added dropwise to the epichlorohydrin; preferably, the temperature of the water bath is 35- 55° C.; the completion time of dropwise addition is in the range of 20-50 min; the reaction time is determined according to the reaction temperature, and according to a preferred embodiment of the present invention, the reaction time is 7-8 h. By the aforementioned technical means, the inhibitory effect on hydrate can be further improved.
[0038] According to the method of the present invention, in order to further improve the inhibitory effect on hydrate, the alkyl group in the dimethylalkylamine is selected from C4-C12 straight-chain alkyl groups.
[0039] According to a preferred embodiment of the method of the present invention, the molar ratio of epichlorohydrin to dimethylalkylamine is: 0.4-2:1; preferably 0...
preparation example 1
[0045] Preparation of N-2,3-epoxypropyldimethylbutylammonium chloride: add epichlorohydrin to a three-necked flask, add N,N-dimethyl-n-butylamine dropwise in a water bath at 45°C, 20min was added dropwise; the molar mass ratio of epichlorohydrin and dimethyl-n-butylamine was 1:1.2. The reaction time was 7.5h. With the progress of the reaction, the solution gradually changed from a transparent liquid to a pale yellow liquid, and finally turned into a yellow gum. After cooling to room temperature, it was purified with acetone, and the target product was obtained after vacuum drying.
preparation example 2
[0047] The preparation method of N-2,3-epoxypropyl dimethyl dodecyl ammonium chloride: add epichlorohydrin to a three-necked flask, and dropwise add dodecyl dimethyl tert Amine was added dropwise in 50 min; the molar mass ratio of epichlorohydrin and dodecyldimethyl tertiary amine was 1:1. The reaction time was 8h. With the progress of the reaction, the solution gradually changed from a transparent liquid to a yellow liquid, and finally turned into a yellow gum. After cooling to room temperature, it was purified with acetone, and the target product was obtained after vacuum drying.
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