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Method for preparing nano iron oxide yellow

An iron oxide yellow, nano-technology, applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve the problems of low economic benefits, low product added value, environmental pollution, etc., to eliminate environmental pollution, obviously. Social and economic benefits, good dispersion effect

Inactive Publication Date: 2006-03-15
上海工大科技园区环境工程有限公司
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Problems solved by technology

[0004] Titanium dioxide is an important chemical raw material closely related to the national economy. In my country, the sulfuric acid method is mainly used to produce titanium dioxide, and a large amount of waste by-products are produced in the production process. According to statistics, sulfuric acid method is used to produce one ton of titanium dioxide. Iron (green vitriol) solids are 3 to 4 tons. If they are discharged directly without treatment, the environment will be seriously polluted; and the traditional uses of titanium dioxide by-product green vitriol are as water purifiers, fertilizers, and soil conditioners. and ordinary iron oxide pigments, etc., the added value of the product is very low, and the economic benefit is not high, so we should try to make full use of this resource

Method used

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Experimental program
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Embodiment 1

[0026] Take 400ml purified FeSO with a concentration of 15% (g / g) 4 Solution (where Mn 2+ Content is less than 0.065%, Ti 4+ The content is less than 0.01%), add 0.013g / L sodium hexametaphosphate and 0.020g / LOP-10 mixed additives at a stirring speed of 150-250rpm and a temperature of 25-35℃, and then add 10% Na 2 CO 3 Solution to pH 5.5~6.5, with 0.16m 3 / h flow of oxygen, react at 25-35℃, prepare nanometer iron oxide yellow seed crystal; then heat up to 55℃, and then use 0.16m 3 / h flow of oxygen is introduced, and 10% Na is added dropwise to the solution containing seed crystals 2 CO 3 The solution maintains the pH value of 5.5 and reacts for 8 hours to grow the seed crystals. After the reaction, the suspension containing nano-iron oxide yellow is filtered, dried, and pulverized to obtain nano-iron oxide yellow particles that are bright yellow and the crystal form is α- FeOOH structure, good particle dispersion, the radial length of the particles is 100-120nm, and the axial leng...

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Abstract

A process for preparing nano-class iron oxide yellow from refined FeSO4 includes such steps as adding sodium hexametaphosphate and alkylphenol polyoxyvinylether to the solution of refined FeSo4 while stirring, dropping 10% Na2CO3 solution to make pH=3.5-6.5, introducing O2 gas, reaction at 20-40 deg.C to obtain crystal seeds, introducing O2 gas at 50-60 deg, dropping Na2CO3 solution to make pH=3.0-5.5, reaction for 8 hr to grow crystal, filter, drying and pulverizing.

Description

Technical field [0001] The invention discloses a preparation method for preparing nanometer iron oxide yellow, which belongs to the field of compound preparation technology. Background technique [0002] Nano-iron oxide yellow has a transparent and bright coloring effect and strong light resistance and weather resistance. It has a wide range of uses in the fields of car high-grade flash paint coatings, inks, plastics, food, medicine and cosmetics. At the same time, nano-iron oxide yellow is used for synthesis of other Nano iron oxide pigments and important precursors of iron-based magnetic materials. As a highly functional nano-inorganic particle material, its performance is closely related to its morphological structure, including size and distribution, crystal structure and color. [0003] There are various methods for preparing iron oxide yellow. A method for preparing iron oxide yellow is described in Ullmanns Encyclopadie der technischen Chemie (5th Edition, Volume A20, p297...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/24C09C3/00
Inventor 施利毅邢建南
Owner 上海工大科技园区环境工程有限公司
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