Method for analyzing chlorine hydride in hydrochloric acid
A technology for hydrogen chloride and hydrogen chloride gas, which is applied in the field of analyzing hydrogen chloride, can solve the problems such as the discharge of hydrochloric acid waste liquid, and achieve the effects of reducing production accidents, saving investment and reducing costs.
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[0015] Example
[0016] A chemical plant with an annual output of 20,000 tons of trichlorosilane project uses hydrochloric acid deep analysis process to produce hydrogen chloride. Take dilute hydrochloric acid with a mass fraction of 18% and mix it with a calcium chloride solution with a mass fraction of 45% in the high temperature analysis tower, and heat the mixed solution to 120℃~130℃ through a reboiler, and obtain saturated water at the top of the tower The hydrogen chloride gas is cooled and dried to obtain the required hydrogen chloride gas; a mixture of 1% by mass dilute hydrochloric acid and 20% by mass calcium chloride is obtained at the bottom of the tower; 1% dilute hydrochloric acid and 1% by mass are obtained from the bottom of the tower The 20% calcium chloride mixture was pumped into the concentration kettle, and calcium hydroxide solution was added to the concentration kettle, adjusted to PH=7~10, heated to 145°C for concentration, evaporated water, and concentrate...
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