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Thermal stabilization type ponceau 2R intercalation hydrotalcite dye and preparation method thereof

A thermally stable and hydrotalcite technology, applied in the direction of organic dyes, can solve problems such as complex preparation methods, and achieve the effects of simple process, good thermal stability, and mild reaction conditions

Inactive Publication Date: 2012-08-01
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its disadvantage is that the preparation method is complex

Method used

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  • Thermal stabilization type ponceau 2R intercalation hydrotalcite dye and preparation method thereof
  • Thermal stabilization type ponceau 2R intercalation hydrotalcite dye and preparation method thereof
  • Thermal stabilization type ponceau 2R intercalation hydrotalcite dye and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Step A: Take MgCl 2 ·6H 2 O (13.55g, 0.066mol), AlCl 3 ·6H 2 O (8.04g, 0.033mol) was dissolved in 200ml to remove CO 2 of deionized water in a 250ml three-necked bottle. Another 20.96ml of concentrated ammonia water with a concentration of 25-28wt% was dissolved in 83.84ml of deionized water. in N 2 Slowly drip the diluted ammonia solution into the mixed salt solution under protection, stir for 10 minutes, and let stand for 45 minutes. The suspension was filtered and washed until pH = 8-9, and the obtained sol was peptized at 80° C. for 24 hours, and dried to obtain a hydrotalcite-like precursor.

[0039] Step B: Weigh Ponceau 2R (1.92g, 0.004mol) according to the ratio of Ponceau 2R to the hydrotalcite precursor molar ratio of 2, dissolve in 100ml to remove CO 2 of deionized water.

[0040] Step C: Mix 0.002 mol of the hydrotalcite-like precursor in Step A and the Ponceau 2R solution in Step B in an airtight container, stir and react at 70°C for 48 hours, filte...

Embodiment 2

[0045] Step A: Take MgCl 2 ·6H 2 O (15.23g, 0.075mol), AlCl 3 ·6H 2 O (6.03g, 0.025mol) was dissolved in 200ml to remove CO 2 of deionized water in a 250ml three-necked bottle. Another 20.21ml of concentrated ammonia water was dissolved in 80.84ml of deionized water. in N 2 Slowly drip the diluted ammonia solution into the mixed salt solution under protection, stir for 15 minutes, and let stand for 45 minutes. The suspension was filtered and washed until pH = 8-9, and the obtained sol was peptized at 80° C. for 24 hours, and dried to obtain a hydrotalcite-like precursor.

[0046] Step B: Same as Example 1.

[0047] Step C: Mix 0.002 mol of hydrotalcite-like precursor and Ponceau 2R solution in an airtight container, stir and react at 70°C for 36 hours, filter and wash until the pH value is about 7, and dry at 70°C for 18 hours to obtain Ponceau Chunhong 2R anion intercalation hydrotalcite-like material.

[0048] Mg prepared in step A 2+ / Al 3+ XRD of the precursor o...

Embodiment 3

[0050] Step A: Take MgCl 2 ·6H 2 O (16.26g, 0.08mol), AlCl 3 ·6H 2 O (4.82g, 0.02mol) was dissolved in 200ml to remove CO 2 of deionized water in a 250ml three-necked bottle. Another 19.75ml of concentrated ammonia water was dissolved in 79.00ml of deionized water. in N 2 Slowly drip the diluted ammonia solution into the mixed salt solution under protection, stir for 10 minutes, and let stand for 60 minutes. The suspension was filtered and washed until pH = 8-9, and the obtained sol was peptized at 80° C. for 24 hours, and dried to obtain a hydrotalcite-like precursor.

[0051] Step B: Same as Example 1.

[0052] Step C: Mix 0.002 mol of hydrotalcite-like precursor and Ponceau 2R solution in an airtight container, stir and react at 70°C for 96 hours, filter and wash until the pH value is about 7, and dry at 65°C for 24 hours to obtain Ponceau Chunhong 2R anion intercalation hydrotalcite-like material.

[0053] Mg prepared in step A 2+ / Al 3+ XRD of the precursor of ...

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Abstract

The invention relates to thermal stabilization type ponceau 2R intercalation hydrotalcite dye and a preparation method thereof. A structural formula is [M2+1-xM3+x(OH)2](C18H12N2Na4O13S4)2-x / 2-mH2O, wherein 0.1<x<0.5, 0.2<(x / 1-x)<0.5, and m=1-3x / 2. M2+ is one or two of Mg2+, Zn2+, Fe2+, Ni2+ or Cu2. M3+ is a trivalent metal ion AL3+, Fe3+ or Cr3+. A hydrotalcite-like precursor with a negative ion C1-, NO3- or SO42- is prepared by adopting a co-precipitation method. Ponceau 2R negative ions with large ionic radius replace intercalation negative ions and enter hydrotalcite intercalation through a hydrothermal ion exchange method to produce ponceau 2R negative ion intercalation hydrotalcite. The ponceau 2R intercalation hydrotalcite dye has good thermal stability and can serve as novel dye to be used.

Description

technical field [0001] The invention relates to a heat-stable ponceau 2R intercalation hydrotalcite-like dye and a preparation method thereof. Background technique [0002] Ponceau 2R (ponceau 2R) is a dark red azo organic dye, which is widely used in the fields of biological dyeing and analytical chemistry. Due to its poor heat resistance, its application range and use effect are greatly limited, so it is of great significance to improve the heat resistance of Ponceau 2R. [0003] Hydrotalcites, also known as layered double hydroxides (LDHs for short), are hydroxides with a hydrotalcite layered structure composed of divalent metal ions and trivalent metal ions. Its structural features: first, it has a layered crystal structure, and the layers have structural positive charges; second, there are exchangeable anions between the layers. Due to its intercalation and assembly properties, some functional species can be inserted into the hydrotalcite-like layers by using this pro...

Claims

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Application Information

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IPC IPC(8): C09B67/02C09B67/00
Inventor 刘建强付兴琦宋箭叶冷明哲
Owner SHANDONG UNIV
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