FIELD: chemistry.
SUBSTANCE: invention relates to a technology for the production of goethite of a phase α-FeOOH and its use. Goethite has i) aspect ratio AR of less than 1.5; ii) value CIELAB L* from 58 to 59; iii) value CIELAB b* from 43 to 47; iv) value Δb* of less than 0.6, which is the difference between corresponding values of b* determined before and after grinding by a method, which is goethite processing carried out using an agate ball with a diameter of 10 mm in a vibrating ball mill at a frequency of 2000 min-1 for 2 min.
EFFECT: obtained goethite has an increased value of a yellow index b* and stable saturated color.
6 cl, 2 tbl, 4 ex
| Title | Year | Author | Number |
|---|---|---|---|
| RED IRON OXIDE PIGMENTS WITH IMPROVED COLOR PARAMETERS | 2015 |
|
RU2701032C2 |
| OBTAINING RED IRON OXIDE PIGMENTS | 2015 |
|
RU2697460C2 |
| OBTAINING RED IRON OXIDE PIGMENT | 2015 |
|
RU2697459C2 |
| METHOD OF PRODUCING PIGMENT FERRUM (III) OXIDE HAVING @@@-MODIFICATION | 0 |
|
SU1809833A3 |
| METHOD OF PRODUCTION OF THE FERRIC OXIDES | 2003 |
|
RU2318730C2 |
| COATED PIGMENTS FOR COLOURING POLYVINYL CHLORIDE | 2015 |
|
RU2697446C2 |
| FIRE RETARDANTS | 2011 |
|
RU2573507C2 |
| MIXTURE OF COATED PIGMENTS WITH FATTY ACID SALTS FOR COLOURING POLYVINYL CHLORIDE | 2015 |
|
RU2691717C2 |
| MAGNETIC MACHINE-READABLE PAINTS FIXED IN OXIDATION, USED IN INTAGLIO PRINTING | 2017 |
|
RU2720421C2 |
| MODIFIED CARBONIZED RED SLUDGE | 2014 |
|
RU2645511C2 |
