A kind of preparation method and application of potassium octatitanate whisker

A technology of potassium octatitanate and whiskers, which is applied in the field of adsorbing heavy metal ions with potassium octatitanate, can solve the problems of complex production process of potassium octatitanate, restricted development and high cost, achieve good industrial development prospects and reduce production costs , the effect of less environmental pollution

Inactive Publication Date: 2018-02-27
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Potassium octatitanate whiskers, similar in structure to potassium hexatitanate, have a better adsorption effect on heavy metal ions, but the production process of potassium octatitanate is more complicated and the cost is higher, which limits its development

Method used

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  • A kind of preparation method and application of potassium octatitanate whisker
  • A kind of preparation method and application of potassium octatitanate whisker
  • A kind of preparation method and application of potassium octatitanate whisker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Preparation of potassium octatitanate reaction precursor

[0028] Using metatitanic acid and potassium carbonate as raw materials, potassium carbonate and metatitanic acid (containing TiO 2 , 40wt%) molar ratio [n(K 2 CO 3 ) / n(TiO 2 )] at a ratio of 1:4.5 and mix evenly at room temperature, put it in a drying oven at 150°C, stir regularly, dry for 24 hours to obtain a reaction precursor, and grind it finely for later use.

[0029] (2) Preparation of potassium octatitanate whiskers

[0030] Take 100g of the obtained reaction precursor and put it into a 250ml crucible, put it in a muffle furnace, and use the method of gradient heating to roast (the heating program is: 200°C 1h+300°C 1h+400°C 1h+500°C 1h+600°C 8h ). Put the sample obtained after roasting into an azeotropic water bath and boil for 10 hours. After the product is leached in water, it is filtered, washed and dried to obtain potassium octatitanate whiskers. figure 1 TiO in potassium carbonate and meta...

Embodiment 2

[0044] Potassium octatitanate whiskers are prepared by the same method as in Implementation 1, and the experimental steps for the absorption of heavy metal ions by potassium octatitanate whiskers are the same as in Example 1, changing the ion solution to 80, 120, 160, 200, 300 mg / L of Pb 2+ solution, potassium octatitanate whiskers can be obtained for different concentrations of Pb 2+ Adsorption effect, as shown in Table 3:

[0045] Table 3 Potassium octatitanate whiskers to different concentrations of Pb 2+ Adsorption

[0046]

[0047]

[0048] Note: C 1 Indicates Pb 2+ The initial concentration is 80mg / L; C 2 Indicates Pb 2+ The initial concentration is 120mg / L; C 3 Indicates Pb 2+ The initial concentration is 160mg / L; C 4 Indicates Pb 2+ The initial concentration is 200mg / L; C 5 Indicates Pb 2+ The initial concentration is 300mg / L.

[0049] After 120min of reaction, potassium octatitanate whiskers reacted with different concentrations of Pb 2+ The adsorpt...

Embodiment 3

[0055] Potassium octatitanate whiskers were prepared by the same method as in Implementation 1. The experimental procedure for the adsorption of heavy metal ions by potassium octatitanate whiskers was the same as that in Example 1. The amount of potassium octatitanate whiskers was changed to 1.0 g, and the ion solution was changed to 40, 80, 120, 160, 200mg / L Ni 2+ solution, potassium octatitanate whiskers can be obtained for different concentrations of Ni 2+ Adsorption effect, as shown in Table 5:

[0056] Table 5 Potassium octatitanate whiskers to different concentrations of Ni 2+ Adsorption

[0057]

[0058]

[0059] Note: C 1 means Ni 2+ The initial concentration is 40mg / L; C 2 means Ni 2+ The initial concentration is 80mg / L; C 3 means Ni 2+ The initial concentration is 120mg / L; C 4 means Ni 2+ The initial concentration is 160mg / L; C 5 means Ni 2+ The initial concentration is 200mg / L.

[0060] After 120min of reaction, potassium octatitanate whiskers rea...

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Abstract

The invention discloses a preparation method of potassium octatitanate whiskers and a method for absorbing heavy metal ions. The preparation method uses metatitanic acid and potassium carbonate as raw materials, adopts a sintering method to prepare potassium octatitanate whiskers, and uses It adsorbs Cu2+, Pb2+, Ni2+ or Cr3+ heavy metal ion solution. In the method, potassium octatitanate whiskers are prepared by using metatitanic acid, an intermediate product in the sulfuric acid process titanium dioxide production process, as a raw material, and the production cost is low and the preparation method is simple. The prepared potassium octatitanate whiskers have the advantages of good adsorption effect on heavy metal ions, easy separation, good reusability, low environmental pollution, etc., and have good industrial development prospects.

Description

technical field [0001] The invention belongs to the technical field of potassium octatitanate whisker adsorption of heavy metal ions, in particular refers to the method for preparing potassium octatitanate by sintering method using metatitanic acid and potassium carbonate as raw materials, and also relates to the adsorption of heavy metal ions by potassium octatitanate method. Background technique [0002] With the rapid development of my country's national economy, industries such as mining, smelting, storage batteries, electrolytic plating, and dyes have to discharge a large amount of industrial wastewater and waste residues containing heavy metal ions every year, causing serious environmental pollution. More importantly, heavy metals can pass through the soil. , water, air, especially the food chain, bring serious harm to human health. [0003] At present, the common methods to control heavy metal pollution at home and abroad include ion exchange method, chemical precipit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/06B01J20/30C01G23/00C02F1/28C02F1/62
Inventor 朱晓燕殷恒波
Owner JIANGSU UNIV
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