Process for preparing detergent builder zeolite-a from kimberlite tailings
a technology of detergent builder zeolite and kimberlite, which is applied in the direction of detergent compounding agents, crystalline aluminosilicate zeolites, and silica compounds. it can solve the problems of high temperature alkali fusion of aluminum, process limitations, and large quantity of kimberlite tailings to be generated, and achieve high whiteness index
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example 1
[0108] 500 g of Kimberlite tailing was digested in a round bottom flask with 100 g NaOH and 1280 g of tap water at boiling temperature with continuous stirring for 5 hours under reflux conditions. After completion of the digestion, sodium silicate was separated by filtration. For the preparation of sodium aluminate solution 7.9 g of NaOH and 6.3 g of aluminum trihydrate were dissolved in 17.4 g of water under continuous stirring and heating 62 g of sodium silicate (having 2.93% Na2O and 7.75% SiO2) was taken in a stainless steel vessel and to this sodium aluminate solution was added at the controlled rate and at ambient temperature under continuous stirring for the gel formation. It was then transferred in a closed reactor and crystallized at 95° C. for 2.5 hours. After crystallization, the product slurry was filtered and washed with deionized water till the pH of the filtrate was ˜10.5. Wet cake was dried in oven at 110° C. for 6 hours. X-Ray diffraction analysis of this product sh...
example 2
[0109] 500 g of Kimberlite tailing was digested in a round bottom flask with 100 g NaOH and 1280 g of tap water at boiling temperature with continuous stirring for 5 hours under reflux conditions. After completion of the digestion, sodium silicate was separated by filtration. For the preparation of sodium aluminate solution 7.9 g of NaOH and 6.3 g of aluminum trihydrate were dissolved in 17.4 g of water under continuous stirring and heating. 62 g of sodium silicate (having 2.93% Na2O and 7.75% SiO2) was taken in a stainless steel vessel and to this sodium aluminate solution was added at the controlled rate and at ambient temperature under continuous stirring for the gel formation. It was then transferred in a closed reactor and crystallized at 95° C. for 1.0 hours. After crystallization, the product slurry was filtered and washed with deionized water till the pH of the filtrate was ˜10.5. Wet cake was dried in oven at 110° C. for 6 hours. X-Ray diffraction analysis indicated that th...
example 3
[0110] 72 g of Kimberlite-tailing was digested in a round bottom flask with 20 g NaOH and 200 g of tap water at boiling temperature with continuous stirring for 5 hours under reflux conditions. After completion of digestion, sodium silicate was separated by filtration. For preparing sodium aluminate solution 7.44 g of NaOH and 6.28 g of aluminum trihydrate were dissolved in 54.46 g of water under continuous stirring and heating. 25.20 g of sodium silicate (having 8.62% Na2O and 19.05% SiO2) was taken in a stainless steel vessel and to this sodium aluminate solution was added at a controlled rate and at ambient temperature under continuous stirring for gel formation. After preparation of gel, 100 mg of Zeolite-A crystals were added as seeds. It was then transferred in a closed reactor and crystallized at 95° C. for 1.0 hour. After crystallization, product slurry was filtered and washed with deionized water till pH of filtrate was ˜10.5. Wet cake was dried in oven at 110° C. for 6 hou...
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