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Process for preparing detergent builder zeolite - A from kimberlite tailings

A technology of tailings and zeolite, applied in the direction of detergent compounding agent, detergent composition, chemical instruments and methods, etc.

Inactive Publication Date: 2007-12-19
COUNCIL OF SCI & IND RES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The limitation of this method is the need to add organic compounds

Method used

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  • Process for preparing detergent builder zeolite - A from kimberlite tailings
  • Process for preparing detergent builder zeolite - A from kimberlite tailings

Examples

Experimental program
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Effect test

Embodiment 1

[0109] Under reflux conditions and continuous stirring, 500 g of kimberlite tailings were digested in a round bottom flask with 100 g of NaOH and 1280 g of tap water at boiling temperature for 5 hours. After the digestion is complete, the sodium silicate is isolated by filtration. To prepare the 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. For gel formation, 62 g of sodium silicate (with 2.93% Na 2 O and 7.75% SiO 2 ) into a stainless steel container, and the sodium aluminate solution was added to the container at a controlled rate at ambient temperature with stirring. It was then transferred to a closed reactor and crystallized at 95°C for 2.5 hours. After crystallization, the product slurry was filtered and washed with deionized water until the pH of the filtrate was ~10.5. The wet cake was dried in an oven at 110°C for 6 hours. X-ray diffraction analysis of this produc...

Embodiment 2

[0111] Under reflux conditions and continuous stirring, 500 g of kimberlite tailings were digested in a round bottom flask with 100 g of NaOH and 1280 g of tap water at boiling temperature for 5 hours. After the digestion is complete, the sodium silicate is isolated by filtration. To prepare the 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. For gel formation, 62 g of sodium silicate (with 2.93% Na 2 O and 7.75% SiO 2 ) into a stainless steel container, and the sodium aluminate solution was added to the container at a controlled rate at ambient temperature with stirring. It was then transferred to a closed reactor and crystallized at 95°C for 1.0 hour. After crystallization, the product slurry was filtered and washed with deionized water until the pH of the filtrate was ~10.5. The wet cake was dried in an oven at 110°C for 6 hours. X-ray diffraction analysis revealed that t...

Embodiment 3

[0113] Under reflux conditions and continuous stirring, 72 g of kimberlite tailings were digested in a round bottom flask with 20 g of NaOH and 200 g of tap water at boiling temperature for 5 hours. After the digestion is complete, the sodium silicate is isolated by filtration. To prepare the 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. For gel formation, 25.20 g of sodium silicate (with 8.62% Na 2 O and 19.05% SiO 2 ) into a stainless steel container, and the sodium aluminate solution was added to this container at a controlled rate at ambient temperature with stirring. After preparation of the gel, 100 mg of Zeolite-A was added as seed crystals. It was then transferred to a closed reactor and crystallized at 95°C for 1.0 hour. After crystallization, the product slurry was filtered and washed with deionized water until the pH of the filtrate was ~10.5. The wet cake wa...

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Abstract

The present invention provides a process for the preparation of detergent builder Zeolite-A from Kimberlite tailing generated as solid waste during diamond mining is disclosed. The process comprises, reacting an acid treated Kimberlite tailing with alkali solution to obtain sodium silicate and reacting it with alkaline aluminium source at room temperature and crystallizing at higher temperature to obtain Zeolite-A. The product is useful as builder in detergent formulation.

Description

technical field [0001] The invention relates to a method for preparing detergent builder zeolite-A from Kimberlite tailings. More particularly, the present invention relates to the use of the active silica content of kimberlite tailings for the preparation of detergent builder Zeolite-A in a manner which allows the preparation of sodium silicate and further soluble aluminate in the form of water Salt interaction to obtain Zeolite-A. Background technique [0002] Zeolites are made from SiO 4 - and AlO 4 - Crystalline aluminosilicates with a regular three-dimensional porous lattice structure composed of tetrahedrons, in which negative charges are compensated by mono- or polyvalent cations. These cations can be exchanged without disrupting the lattice structure. Their application as water softeners is mainly due to this property. Hard water contains calcium and / or magnesium salts which greatly reduce the surfactant effectiveness of soaps and detergents. Hard water is so...

Claims

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Application Information

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IPC IPC(8): C01B39/14
CPCC01B33/14C11D3/128
Inventor 拉克希・维尔・贾斯拉R・S・索马里H・M・莫迪H・C・巴贾杰J・R・丘纳瓦纳埃马尔・兰帕纳迪普提・巴罗奇亚德文德拉・盖拉尼苏雷什・钱德拉M・K・达尔凯沙夫・拉奥坎列什・库马尔
Owner COUNCIL OF SCI & IND RES
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