Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
An iron oxide brown and oxygen technology, applied in the direction of iron oxide, iron oxide/iron hydroxide, etc., can solve the problems of unstable product quality and uneven hue, and achieve the effects of convenient operation, pure shade and stable quality.
Inactive Publication Date: 2012-06-20
ANHUI MINGZHU PIGMENT TECH
View PDF4 Cites 6 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0003] The traditional iron oxide brown is made by physical blending of iron black, iron yellow and iron red. The quality of the product is unstable and there is a lack of uneven hue. Therefore, the direct synthesis of iron brown products is superior to physical mixing in performance. The product
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0020] A kind of preparation method of iron oxide brown, it is characterized in that: comprise the following steps:
[0021] (1), in the reaction kettle, the ferrous sulfate solution with the concentration of 38-42% and the liquid caustic soda with the concentration of 40-45% are mixed into a slurry in a mass ratio of 1: 0.25-0.3, and water is added to make the slurry The concentration is adjusted to 10-12%, and the temperature is raised to 80-85°C;
[0022] (2), slowly add sodium nitrite according to the ratio of 36KG per ton of product input, and feed oxygen at the same time, and then open the spray equipment to fully mix the slurry, oxygen and the NO produced in the reaction process;
[0023] (3) During the reaction process, keep sampling and comparing with the standard sample, the color of the product is similar to that of the standard sample with yellow-brown or reddish-brown shade, and then stop the reaction, and the taken out slurry is filtered, washed, dried, and broke...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention discloses a preparation method of iron oxide brown, comprising the following steps of: adding ferrous sulfate and liquid caustic soda into a closed reaction kettle to be mixed to form a material slurry; adding water to adjust the concentration of the material slurry to 10-12%; raising a temperature to a value in a range of 80-85 DEG C and then slowly adding sodium nitrite while introducing oxygen, then starting spraying equipment to sufficiently mix the material slurry, the oxygen and NO which is generated in a reaction process; continuously sampling in the reaction process and comparing with a standard sample; stopping the reaction after the color light of a product is approximate to that of the standard sample; and carrying out filter pressing on the fetched material slurry, washing, drying and crushing to obtain the product. Iron oxide brown produced by the method of the invention has the advantages of stable quality, pure color light, simple synthesis method and convenience for operation.
Description
technical field [0001] The invention relates to a production method of iron brown, in particular to a preparation method of iron oxide brown. Background technique [0002] The molecular formula of iron oxide brown is (Fe 2 o 3 +FeO)·nH 2 O, it is a brown powder, insoluble in water, alcohol, ether, soluble in hot strong acid, at the same time, it has high tinting power and hiding power, good light resistance, alkali resistance, no water permeability and oil permeability. Its hue is divided into yellow-brown, red-brown, black-brown and so on according to different crafts. It is widely used in the coloring of paint, ink, plastic, shoe powder and other products, as well as in the coloring of paint, construction, rubber, plastic, etc. [0003] The traditional iron oxide brown is made by physical blending of iron black, iron yellow and iron red pigments. The quality of the product is unstable and there is a lack of uneven hue. Therefore, the direct synthesis of iron brown prod...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more