A kind of method that dihydrate calcium sulfate whisker is prepared with mirabilite and calcium water
A technology of calcium sulfate dihydrate and Glauber's salt, applied in chemical instruments and methods, single crystal growth, single crystal growth, etc., can solve the problems of polluting fresh water resources, high impurities in Glauber's salt, low utilization rate, etc., and achieve uniform reaction system, The effect of completely uniform mass transfer and uniform morphology
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Embodiment 1
[0032] The concrete steps of the method for preparing calcium sulfate dihydrate crystal whisker with Glauber's salt and calcium water of the present invention are as follows:
[0033] (1) Purification of calcium aqueous solution:
[0034] Add it to industrial calcium water under normal temperature conditions (the amount is to remove impurities (Ba 2+ 、Sr 2+ ) 1.05 times of required amount) concentration is 10~30wt% sulfuric acid, stirs 20min, centrifuges solid-liquid then, obtains relatively pure calcium aqueous solution;
[0035] (2) Preparation of raw material solution:
[0036] Add calcium chloride or water to the calcium water to adjust the concentration of calcium water to 0.6mol / L;
[0037] Prepare an aqueous solution of Glauber's salt with a concentration of 1.6mol / L, the volume ratio of the Glauber's salt solution to the calcium aqueous solution is 0.4:1, and add 0.5wt% surfactant to the prepared Glauber's salt solution;
[0038] Then preheat the calcium water and ...
Embodiment 2
[0047] The concrete steps of the method for preparing calcium sulfate dihydrate crystal whisker with Glauber's salt and calcium water of the present invention are as follows:
[0048] (1) Purification of calcium aqueous solution:
[0049] Adding sulfuric acid with a concentration of 10-30wt% to industrial calcium water under normal temperature conditions, the amount of addition is Ba 2+ 、Sr 2+1.10 times the required amount, stirred for 50 minutes, and then centrifuged to separate the solid and liquid to obtain a relatively pure calcium aqueous solution;
[0050] (2) Preparation of raw material solution:
[0051] Add calcium chloride or water to the calcium water to adjust the concentration of calcium water to 1.6mol / L;
[0052] Prepare an aqueous solution of Glauber's salt with a concentration of 0.6 mol / L, the volume ratio of the Glauber's salt solution to the calcium aqueous solution is 1.2:1, and add 1wt% surfactant to the prepared Glauber's salt solution;
[0053] Then...
Embodiment 3
[0062] The concrete steps of the method for preparing calcium sulfate dihydrate crystal whisker with Glauber's salt and calcium water of the present invention are as follows:
[0063] (1) Purification of calcium aqueous solution:
[0064] Adding sulfuric acid with a concentration of 10-30wt% to industrial calcium water under normal temperature conditions, the amount of addition is Ba 2+ 、Sr 2+ 1.08 times the required amount, stirred for 30 minutes, and then centrifuged to separate the solid and liquid to obtain a relatively pure calcium aqueous solution;
[0065] (2) Preparation of raw material solution:
[0066] Add calcium chloride or water to the calcium water to adjust the concentration of calcium water to 1.0mol / L;
[0067] Prepare an aqueous solution of Glauber's salt with a concentration of 1.0mol / L, the volume ratio of Glauber's salt solution to calcium aqueous solution is 0.8:1, and add 0.8wt% surfactant to the prepared Glauber's salt solution;
[0068] Then prehe...
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