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Yellow organic dye and preparation thereof

A technology of inorganic pigments and yellow pigments, applied in the fields of inorganic pigment processing, inorganic chemistry, chemical instruments and methods, etc., can solve the problems of cost, unsatisfactory color performance in industrial applications, and long time.

Inactive Publication Date: 2008-09-10
COUNCIL OF SCI & IND RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some problems in its synthetic method
Heating conditions must be precisely controlled to synthesize cerium thiosilicate and the method is too time consuming (minimum 13 days)
[0013] Although some alternative yellow pigments based on cerium oxide and other transition metal oxides have been reported, their color properties are unsatisfactory for industrial applications (see T.Masui, H.Tategaki, N.Imanaka, J. Mater. Sci. 2004, 39, 4909-4911; Imanaka et al., Chem. Lett. 2005, 34, 1322-1323; T. Masui, S. Furukawa and N. Imanaka, Chem. Lett. 2006, 35, 1032-1033 )

Method used

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  • Yellow organic dye and preparation thereof
  • Yellow organic dye and preparation thereof
  • Yellow organic dye and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] PR 2 MoO 6 Preparation of yellow pigment

[0051] This example involves Pr 2 MoO 6 Pigment preparation. Pr 6 o 11 (purity 99.9%) and (NH 4 ) 6 Mo 7 o 24 4H 2 O (purity 99.9%) was mixed well in an agate mortar and pestle in a stoichiometric ratio. The mixture was calcined at 1050° C. for 9 hours in air. The powder obtained was examined by means of X-ray powder diffraction (XRD) with Ni-filtered CuKα1 radiation with a Philips X'pert Pro diffractometer. figure 1 The XRD pattern of the compound shown in is in good agreement with Powder X-ray Diffraction Archive: PDF No. 24-913. Morphological analysis was performed by means of a scanning electron microscope with a JEOL JSM-5600LV SEM. The particle size of the pigments varies in the range of 1-2 μm. The optical reflectance of the powder measured with a UV-Vis spectrophotometer (Shimadzu, UV-2450) with barium sulfate as a reference is shown in figure 2 middle. The chromaticity coordinate determined by the CIE...

Embodiment 2

[0053] PR 2 MtO 8 Preparation of (Tm=Ti or Zr) Yellow Pigment

[0054] This example describes the Pr 2 MtO 8 Synthesis of (Tm=Ti or Zr). TiO 2 (purity 99.9%), ZrO 2 (purity 99.9%), Pr 6 o 11 (purity 99.9%) and (NH 4 ) 6 Mo 7 o 24 4H 2 O (purity 99.9%) was mixed well in an agate mortar and pestle in a stoichiometric ratio. The mixture was calcined at 1100° C. for 9 hours in air. The powder obtained was examined by means of X-ray powder diffraction (XRD) with Ni-filtered CuKα1 radiation with a Philips X'pert Pro diffractometer. image 3 The XRD pattern of the compound shown in is in good agreement with Powder X-ray Diffraction File: PDF No. 49-0601. Morphological analysis was performed by means of a scanning electron microscope with a JEOL JSM-5600LV SEM. The particle size of the pigment powder was found to vary in the range of 1-5 μm. The optical reflectance of the powder measured with a UV-Vis spectrophotometer (Shimadzu, UV-2450) with barium sulfate as a refe...

Embodiment 3

[0058]A Pr 2 MoO 7 (A=Mg, Ca, Sr or Ba) Preparation of Yellow Pigment

[0059] This example relates to APr 2 MoO 7 Synthesis of (A = Mg, Ca, Sr or Ba). MgCO 3 (purity 99.9%), CaCO 3 (purity 99.9%), SrCO 3 (purity 99.9%), BaCO 3 (purity 99.9%), Pr 6 o 11 (purity 99.9%) and (NH 4 ) 6 Mo 7 o 24 4H 2 O (purity 99.9%) was mixed well in an agate mortar and pestle in a stoichiometric ratio. The mixture was calcined at 950° C. for 6 hours in air. The powder obtained was examined by means of X-ray powder diffraction (XRD) with Ni-filtered CuKα1 radiation with a Philips X'pert Pro diffractometer. The XRD pattern of the compound is shown in Figure 5 middle. This XRD pattern can be compiled into the phases associated with yttrium niobite. Morphological analysis was performed by means of a scanning electron microscope with a JEOL JSM-5600LV SEM. The particle size of the pigments varies in the range of 1-5 μm. The optical reflectance of the powder measured with a UV-Vi...

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Abstract

The invention provides a yellow inorganic dyestuff which includes praseodymium, oxide of transition metal selected from molybdenum, titanium, zirconium and the combination, molybdenum is necessary, and alkaline-earth metal is random selected. The yellow inorganic dyestuff has formulation A: Pr2MoTmxO6+eta (Tm=Ti or Zr, and x=0 or 1, eta having value that lies on X and satisfies valency of the formula). A high-purity chemical, for example MgCO3, CaCo3, SrCO3, BaCO3, TiO2, ZrO2 and (NH4)6Mo7O24.4H2O and Pr6O11, is weighed with stoichiometric proportion, is ball milled and is calcined 3-12 hours in range of 900-1200 DEG C. Powder that is milled and calcined fully is used for representing dyestuff. Phase purity and optical performance of the prepared dyestuff are researched.

Description

field of invention [0001] The present invention relates to yellow inorganic pigments comprising oxides of alkaline earth metals, praseodymium and transition metals. More specifically, the present invention relates to having the general formula A Pr 2 lm w x o 6+η (Tm=Ti or Zr, and x=0 or 1, n has a value depending on the value of x to satisfy the valence in the formula), wherein A is optional and selected from one or more alkaline earth metals [A = Mg, Ca, Sr or Ba]. The present invention also relates to the general formula A Pr 2 lm w x o 6+η (Tm=Ti or Zr, and x=0 or 1, n has a value depending on the value of x to satisfy the valence in the formula), wherein A is optional and selected from one or more An alkaline earth metal [A=Mg, Ca, Sr or Ba]. The yellow pigments are very suitable for coloring applications of numerous substrates such as paints, varnishes, plastics, ceramics and the like. Background technique [0002] Inorganic pigments are widely used in various...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C09C3/00
CPCC01P2002/84C01G39/00C01P2006/63C01G39/006C01P2002/72C01P2006/64C01P2006/62C01P2004/61
Inventor 帕达拉·普拉巴卡·拉奥穆德拉普迪·拉克希米巴迪·雷迪
Owner COUNCIL OF SCI & IND RES