Non-toxic and non-corrosive heating water odorant
An odorant, non-corrosive technology, applied in water treatment sites, descaling and water softening, complex/solubilizer treatment, etc., can solve problems such as increased maintenance, hidden dangers of safe operation of heating boilers, and increased corrosion , to reduce costs and fuel consumption costs, avoid damage to heating equipment, and improve odor persistence
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[0024] In a preferred embodiment, the preparation method of the cross-linked starch comprises the steps of:
[0025] (1) Take 50g of cornstarch, add 75mL of NaCl solution with a mass fraction of 1wt%, and stir evenly, put it in a constant temperature water bath at 300°C, add 5mL of NaOH solution with a mass fraction of 15%, and after stirring evenly, gradually Add epichlorohydrin dropwise and react for 8 hours to obtain crosslinked starch slurry;
[0026] (2) Pour the synthesized cross-linked starch slurry into the Buchner funnel for suction filtration, add distilled water to wash the precipitate, and adjust it to neutrality with 1mol / L dilute hydrochloric acid, wash with distilled water 4 times, and then wash with absolute ethanol 3 times, and finally put the washed precipitate into a vacuum drying oven at 60°C, dry to constant weight, grind and sieve to obtain the cross-linked starch.
[0027] The cornstarch is food-grade cornstarch, purchased from Jinan Xinshengda Chemical...
Embodiment 1
[0060] Embodiment 1 provides a non-toxic and non-corrosive heating water odorant. In parts by weight, the heating water odorant includes 40 parts of starch, 10 parts of allicin, 10 parts of mercaptan, 5 parts of thiosulfate parts, 25 parts of alkaline agent, 15 parts of water;
[0061] Described starch is corn starch; Described corn starch is cross-linked starch; The preparation method of described cross-linked starch comprises the steps:
[0062] (1) Take 50g of cornstarch, add 75mL of NaCl solution with a mass fraction of 1wt%, and stir evenly, put it in a constant temperature water bath at 300°C, add 5mL of NaOH solution with a mass fraction of 15%, and after stirring evenly, gradually Add epichlorohydrin dropwise and react for 8 hours to obtain crosslinked starch slurry;
[0063] (2) Pour the synthesized cross-linked starch slurry into the Buchner funnel for suction filtration, add distilled water to wash the precipitate, and adjust it to neutrality with 1mol / L dilute hyd...
Embodiment 2
[0073] Embodiment 2 provides a non-toxic and non-corrosive heating water odorant. In parts by weight, the heating water odorant includes 60 parts of starch, 20 parts of allicin, 15 parts of mercaptan, and 10 parts of thiosulfuric acid , 35 parts of alkali agent, 25 parts of water;
[0074] Described starch is corn starch; Described corn starch is cross-linked starch; The preparation method of described cross-linked starch comprises the steps:
[0075] (1) Take 50g of cornstarch, add 75mL of NaCl solution with a mass fraction of 1wt%, and stir evenly, put it in a constant temperature water bath at 300°C, add 5mL of NaOH solution with a mass fraction of 15%, and after stirring evenly, gradually Add epichlorohydrin dropwise and react for 8 hours to obtain crosslinked starch slurry;
[0076] (2) Pour the synthesized cross-linked starch slurry into the Buchner funnel for suction filtration, add distilled water to wash the precipitate, and adjust it to neutrality with 1mol / L dilute...
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