Calcium stearate and preparation process thereof
A calcium stearate and preparation technology, which is applied in the chemical industry, can solve the problems of substandard detection indicators, serious environmental pollution, high free acid content, etc., and achieve the effects of low production cost, good color and low free acid content
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Embodiment 1
[0026] The preparation of embodiment 1 calcium stearate
[0027] S1: Take glyceryl tristearate, stir while feeding, keep the temperature at 100°C, add catalyst A, antioxidant and water after the glyceryl tristearate is completely melted, at a temperature of 140°C, and a pressure of 0.7MPa Carry out hydrolysis reaction under the condition of condition, hydrolyzate stands still 45min, oil and water are separated, and oil phase pressure filtration reclaims catalyst and promptly obtains stearic acid;
[0028] Wherein, by mass ratio, in catalyst A, calcium hydroxide: Al 2 o 3 -MgO is 1:9, its dosage is 6% of the mass of glyceryl tristearate, Al 2 o 3 -MgO is prepared by precipitation method, in molar ratio, Al 2 o 3 :MgO is 2:1;
[0029] In terms of mass ratio, in antioxidants, antioxidant DLTDP: antioxidant T501 is 0.55: 1, and its consumption is 0.3% of the glyceryl tristearate quality;
[0030] By mass ratio, glyceryl tristearate: water is 1: 0.5;
[0031] S2: Add the st...
Embodiment 2
[0036] The preparation of embodiment 2 calcium stearate
[0037] S1: Take glyceryl tristearate, stir while feeding, keep the temperature at 90°C, add catalyst A, antioxidant and water after the glyceryl tristearate is completely melted, at a temperature of 130°C, a pressure of 0.8MPa Carry out hydrolysis reaction under the condition of condition, hydrolyzate stands still 50min, oil-water separation, oil phase pressure filtration reclaims catalyst and promptly obtains stearic acid;
[0038] Wherein, by mass ratio, in catalyst A, calcium hydroxide: Al 2 o 3 -MgO is 1:10, its dosage is 5% of the mass of glyceryl tristearate, Al 2 o 3 -MgO is prepared by precipitation method, in molar ratio, Al 2 o 3 :MgO is 2.5:1;
[0039] In terms of mass ratio, in antioxidants, antioxidant DLTDP: antioxidant T501 is 0.45: 1, and its consumption is 0.4% of tristearin quality;
[0040] By mass ratio, glyceryl tristearate: water is 1: 0.6;
[0041] S2: Add the stearic acid in S1 into the c...
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