Cation fenugreek-humic acid sand curing agent and preparation method thereof
A technology of fenugreek gum and cations, applied in chemical instruments and methods, other chemical processes, applications, etc., can solve problems such as soil improvement and poor effect, and achieve the effects of low cost, convenient use and simple preparation process
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Embodiment 1
[0040] (1) Starch cationic modification
[0041] Weigh 20 parts of starch, make a starch emulsion with an ethanol solution made of 25.5 parts of ethanol and 4.5 parts of water, pour it into a four-neck flask, stir, heat in a water bath to 70°C, and add 0.075mol / L sodium hydroxide ethanol solution Adjust the pH of the starch emulsion to be alkaline, add dropwise an etherification agent made of 1.4 parts of 3-chloro-2 hydroxypropyltrimethylammonium chloride and 0.6 parts of water, and control the system with 0.075 mol / L sodium hydroxide ethanol solution The pH is constant. After the reaction, the pH of the system is adjusted to 6 with 2.0 mol / L hydrochloric acid, and the quaternary ammonium salt type cationic starch product is obtained through dehydration, alcohol washing, drying and sieving.
[0042] (2) Synthesis of Hydrophobic Association Cationic Starch Solution
[0043] Add 15 parts of dried cationic starch and 28 parts of ethanol to a three-necked flask with a stirring de...
Embodiment 2
[0049] (1) Starch cationic modification
[0050] Weigh 20 parts of starch, make a starch emulsion with an ethanol solution made of 25.5 parts of ethanol and 4.5 parts of water, pour it into a four-neck flask, stir, heat in a water bath to 70°C, and add 0.075mol / L sodium hydroxide ethanol solution Adjust the pH of the starch emulsion to be alkaline, add an etherification agent made of 1.3 parts of 3-chloro-2 hydroxypropyltrimethylammonium chloride and 0.7 parts of water dropwise, and control the system with 0.075mol / L sodium hydroxide ethanol solution The pH is constant. After the reaction, the pH of the system is adjusted to 6 with 2.0 mol / L hydrochloric acid, and the quaternary ammonium salt type cationic starch product is obtained through dehydration, alcohol washing, drying and sieving.
[0051] (2) Synthesis of Hydrophobic Association Cationic Starch Solution
[0052] Add 15 parts of dried cationic starch and 28 parts of ethanol to a three-necked flask with a stirring devic...
Embodiment 3
[0058] (1) Starch cationic modification
[0059] Weigh 20 parts of starch, make a starch emulsion with an ethanol solution made of 25.5 parts of ethanol and 4.5 parts of water, pour it into a four-neck flask, stir, heat in a water bath to 70°C, and add 0.075mol / L sodium hydroxide ethanol solution Adjust the pH of the starch emulsion to be alkaline, add an etherification agent made of 1.35 parts of 3-chloro-2 hydroxypropyltrimethylammonium chloride and 0.65 parts of water dropwise, and control the system with 0.075 mol / L sodium hydroxide ethanol solution The pH is constant. After the reaction, the pH of the system is adjusted to 6 with 2.0 mol / L hydrochloric acid, and the quaternary ammonium salt type cationic starch product is obtained through dehydration, alcohol washing, drying and sieving.
[0060] (2) Synthesis of Hydrophobic Association Cationic Starch Solution
[0061] Add 15 parts of dried cationic starch and 28 parts of ethanol to a three-necked flask with a stirring ...
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