Chemical compound applicable to preparation of cleaning agent for heat-supply and heating system and preparation method thereof
A heating system and compound technology, applied in the field of cleaning agents, can solve the problems of waste of fuel or electricity, thermal expansion and contraction, uneven stress, increased risk of boiler bursting or even explosion, etc., to improve thermal efficiency and reduce scaling speed effect
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Embodiment 1
[0019] Add 10mmol (1.26g) of compound A to 20ml of distilled water, heat to 75°C and stir for 30min. After confirming that the raw material is completely dissolved, add 10ml (25%) of methylamine aqueous solution, the reaction temperature is 90°C, and decolorize with an appropriate amount of activated carbon after 5 hours of reaction , recrystallized to obtain B, ESI-MS, m / e=126.03 ([M+H] + ).
[0020] 8 mmol (1.11 g) of compound B and 9 mmol (0.63 g) of C were dissolved in 20 mL of DMF, stirred, 2.07 g (15 mmol) of potassium carbonate was added, and stirring was continued at 100 degrees Celsius until the raw materials were consumed (about 10 hours). The reaction mixture was poured into 100 mL of ice water, stirred, adjusted to pH=2 with concentrated hydrochloric acid, extracted with 50 mL of dichloromethane, the combined extracts were washed once with brine, dried over anhydrous magnesium sulfate, and the solvent was distilled off in a rotary evaporator to obtain a residue , ...
Embodiment 2
[0026] Static anti-scaling test:
[0027] According to the National Standard GB / T16632-2008 of the People's Republic of China "Measurement Calcium Carbonate Deposition Method for Scale Inhibition Performance of Water Treatment", the static scale inhibition experiment was carried out, and the compound of formula I prepared in Example 1 was formulated into a solution for the experiment, and the test results are as follows Table 1 shows:
[0028] Numbering
[0029] Table 1 Static anti-scaling test results
Embodiment 3
[0031] Mouse Toxicity Test:
[0032] 20 ICR mice (provided by Beijing Weitong Lihua Experimental Animal Technology Co., Ltd.), weighing 25-30 grams, were used for acute toxicity experiments. Mice are divided into two groups at random, i.e. control group, administration group, fasting 12 hours before the experiment, then give the 0.10mol / L aqueous solution of the compound of formula 1 that prepares as embodiment 1 gavage, half lethal dose (LD 50 ) was tested and measured, and the LD 50 >2g / kg, so it can be considered as basically non-toxic. The maximum tolerated dose test was carried out on the administration group. Results: According to the feeding amount of 120ml / kg orally, four times in one day, no mice died within seven days, and no toxic reaction was found in the organs of the sacrificed mice. Significant differences.
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