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A kind of production method of high near-infrared reflection ratio titanium brown

A technology of infrared reflection and production method, which is applied in the fields of chemical instruments and methods, fibrous fillers, dyed low-molecular organic compound treatment, etc. It can solve problems such as unstable product quality, achieve excellent near-infrared reflection ability, simple process and low cost cheap effect

Active Publication Date: 2019-03-05
JIANGSU TOP FINE NEW RAW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The more mature titanium brown products on the market mostly use the solid-phase process, with titanium dioxide as the main raw material. Although the process is relatively simple and the cost is low, because titanium dioxide is already a stable crystal structure, a higher temperature is required for solid oxidation Mixed and calcined products, resulting in unstable product quality

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  • A kind of production method of high near-infrared reflection ratio titanium brown

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Embodiment 1

[0022] Take the hydrolyzed titanium dioxide hydrate prepared by the sulfuric acid method titanium dioxide production process, the sedimentation rate is 155mm / 20min, wash the hydrated titanium dioxide with tap water at 55-60°C, and the iron content (calculated as Fe) in the once-washed wastewater is 95mg / L; The hydrated titanium dioxide obtained by washing once with water is added with tap water to make a slurry, the concentration is 322g / L, the temperature is at 60-65°C, and sulfuric acid (with H 2 SO 4 Calculated) is 48g / L, trivalent titanium (as Ti 2 o 3 Calculated) is 0.6g / L, after treatment for 1 hour to account for the TiO contained in the slurry to be treated 2 In terms of mass fraction of the amount, adding orthotitanic acid sol calcined seed crystals (in the form of TiO 2 Calculated), the addition ratio is 2%; the acid-treated hydrated titanium dioxide is washed with desalted water at 60-65°C, and the iron content in the secondary washing wastewater (measured as Fe ...

Embodiment 2

[0024] Take the hydrolyzed titanium dioxide hydrate prepared by the sulfuric acid method titanium dioxide production process, the sedimentation rate is 195mm / 20min, wash the hydrated titanium dioxide with tap water at 60-65°C, and the iron content (calculated as Fe) in the wastewater of one washing is 85mg / L; The hydrated titanium dioxide obtained by washing once with water is added with tap water to make a slurry, the concentration is 375g / L, the temperature is 55~60°C, and sulfuric acid (with H 2 SO 4 Calculated) is 32g / L, trivalent titanium (as Ti 2 o 3 Calculated) is 1.5g / L, after 2 hours of treatment to account for the TiO contained in the slurry to be treated 2 In terms of the mass fraction of the amount, add orthotitanic acid sol calcined seed crystals (calculated as TiO2), and the addition ratio is 7%; the acid-treated hydrated titanium dioxide is washed with 60-65°C desalted water, and the iron in the wastewater is washed twice. content (as Fe 2 o 3 Total) is 10m...

Embodiment 3

[0026] Take the hydrolyzed hydrated titanium dioxide prepared by the sulfuric acid method titanium dioxide production process, the sedimentation rate is 170mm / 20min, wash the hydrated titanium dioxide with tap water at 55-60°C, and the iron content (calculated as Fe) in the once-washed wastewater is 85mg / L; The hydrated titanium dioxide obtained by washing once with water is added with tap water to make a slurry, the concentration is 352g / L, the temperature is 65~70°C, and sulfuric acid (with H 2 SO 4 Calculated) is 35g / L, trivalent titanium (as Ti 2 o 3 ) was 1.1g / L, and after 1.5 hours of treatment, it was based on the mass fraction of TiO contained in the slurry to be treated, and the orthotitanic acid sol was added to calcined seed crystals (in the form of TiO 2 Calculated), the addition ratio is 5%; the acid-treated hydrated titanium dioxide is washed with desalted water at 55-60°C, and the iron content in the secondary washing wastewater (measured as Fe 2 o 3 Total) ...

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Abstract

The invention discloses a production method for titanium brown with high near-infrared reflectivity. The method comprises the following steps: based on high reaction activity of nano-scale hydrous titanium dioxide, selecting suitable nano-scale hydrous titanium dioxide, adding additives, such as, n-titanic acid sol, zinc element, antimony oxide, phosphoric acid and chromic oxide, calcining under high temperature, crushing and removing salt, thereby acquiring the titanium brown with high near-infrared reflectivity. The product has obvious characteristics of reasonable size distribution, moderate color, easiness in dispersing and high near-infrared reflectivity and is an ideal product for a brown near-infrared reflection functional material.

Description

technical field [0001] The invention relates to a method for preparing titanium brown, in particular to a production method for preparing titanium brown with high near-infrared reflectance by using suitable nano-scale hydrated titanium dioxide. Background technique [0002] At present, more and more attention is paid to energy-saving technology at home and abroad, and improving the direct reflection ability of solar radiation is a simple and easy technical route. From the perspective of the energy distribution of the sun, the wavelength of the solar radiant energy that can be received on the earth is mainly distributed in the range of 250-2500nm, which can be divided into three parts. The wavelength range and occupied energy of each part are respectively: The ultraviolet region less than 380nm accounts for about 3% of the total energy; the visible region of 380-780nm accounts for about 45% of the total energy; the near-infrared region greater than 780nm accounts for about 52...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/36C09C3/04C09C3/06C09C3/08C09C3/12
CPCC09C1/3692C09C3/006C09C3/04C09C3/06C09C3/08C09C3/12
Inventor 王玲谢宏伟廖向阳杨伟伟
Owner JIANGSU TOP FINE NEW RAW MATERIAL CO LTD