Resin-specific adsorption of gold
Indicator Parameter
Functional group -N+(CH3) 2H2O
Appearance Milky white opaque sphere
Finished form CLˉ
Moisture content % 45-55
Weight whole exchange capacity mmol/g ≥5.0
Volume whole exchange capacity mmol/ml ≥1.50
Wet density g/ml 1.05-1.1
Wet real density g/ml 0.68-0.75
Particle size range % (0.6-1.80mm)≥95%
Granularity （<0.6mm）≤1.0
Uniformity coefficient 1.5
Sphere rate after abrasion % ≥95%
Indicator Parameter
Regeneration concentration HCl:2-4%；/NaOH:2-4%
pH range 1-10
Highest use temperature℃ OH-100/Cl-40
Expansion rate (OHˉ→Clˉ)% ≤15-20%
Operational flow speed m/h 10-30
Desorption ： "Resin adsorption of gold thiourea with 9% + 3% sulfuric acid analysis, analytical dosage of 6-8 times the bed volume, contact time with Resin for 2h or more.
"
Regeneration process： Resin after resolution after washing, rinse with 2-3 times the bed volumeNaOH, about 1 hour, then rinse renewable HCl solution, the dosage is 2 times the bed volume, time is about 1.5h, washed clean and odor can be the last. (Regeneration concentration reference Reference of indicator)
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Coconut shell activated carbon |
Item Index
Iodine value(mg/g) ≥ 900
Filling density(g/cm3) 0.45
Loss on drying(%) ≤ 10
Strength(%) ≥ 97
PH value 6-8
Granularity (ey... |
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Potassium dichromate |
Item Index
Potassium dichromate （K2Cr2o7） % ≥ 99.7
Chlorides (Cl)% ≤ 0.05
Insoluble ≤ 0.02
Sulfates ( SO4-2) % ≤ 0.02
Na+ % ≤ 0... |
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Sulphuric acid |
Item Index
Concentrated sulfuric acid Fuming sulfuric acid
Sulphuric acid(H2SO4)％ ≥ 92.5or98.0 -
Free sulfur trioxide(SO4)％ ≥ - 20.0or25.... |
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Toluene-2,4-diisocyanate |
Test items Index
Isocyanate ％ ≥99.0
Saponifiable chlorine ％ ≤0.01
Chlorine ％ ≤0.04
Crystallizing point℃ ％ 5.0-6.5
Chromaticity （Hazen... |
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DL-Methionine |
Project Name Quality indicators
Superior grade First grade
Shape White or light gray powder
DL-Methionine% ≥ 99 98.5
Loss on drying% &le... |
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