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Synthetic Iron Oxide Pigments

This is the largest class of synthetic iron oxide pigments. Synthetic red iron oxide pigment corresponds to the natural mineral hematite. It is prepared by mainly four processes ... [Pg.173]

Frondel (1950) Frondel, C. On paratacamite and some related copper chlorides M/nero/ogica/ Magazine 29 (1950) 34A5 Frondel (1962) Frondel, C. Amer. Min. 47 (1962) 781 Fujita et al. (1977) Fujita, T. Kawada, L. Kato, K. Raspite from Broken Hill cia Crystallographica B33 (1977) 162-163 Fuller (1973) Fuller, C.W Colored Iron Oxide Pigments, Synthetic Pigment Handbook 1 Patton, T.C. (ed.) John Wiley, NewYork (1973) 333-349... [Pg.470]

About 60% of the natural iron oxide pigments is used to color cement and other building materials (qv). About 30% is consumed in the production of paints. For coloring plastics and mbber, synthetic iron oxide pigments are preferred. The main advantage of the natural iron oxide pigments, as compared to the synthetic ones, is cost. However, the quaHty is inferior, and in most cases, they are consumed in close proximity to the mines. As colorants, the natural iron oxides are about 50% weaker than synthetically produced iron oxides. [Pg.11]

Synthetic Iron Oxides. Iron oxide pigments have been prepared synthetically since the end of the seventeenth century. The first synthetic red iron oxide was obtained as a by-product of the production of sulfuric acid from iron sulfate containing slate. Later, iron oxide pigments were produced direcdy by the thermal decomposition of iron sulfates. In the 1990s, about 70% of all iron oxide pigments consumed are prepared synthetically. [Pg.11]

The most important synthetic routes to iron oxide pigments involve either thermal decomposition or aqueous precipitation processes. A method of major importance for the manufacture of a-Fe203, for example, involves the thermal decomposition in air of FeS04-7H20 (copperas) at temperatures between 500 °C and 750 °C. The principal method of manufacture of the yellow a-FeO(OH) involves the oxidative hydrolysis of Fe(n) solutions, for example in the process represented by reaction (1). [Pg.154]

Iron Oxide Red, pigment for plastics, 7 370t Iron oxide reds, synthetic, 19 398-399 Iron Oxide Yellow, pigment for plastics, 7 370t... [Pg.493]

Since then, these materials have been increasingly supplanted by their synthetic analogues. The latter can be produced in very pure form with extremely consistent properties. Today, natural iron oxide pigments account for only around 20% of world consumption. The main producers of natural iron oxide pigments are France, India, Cyprus, Iran, Italy and Australia (Buxbaum Printzen, 1993). [Pg.512]

Like the natural iron oxide pigments, the synthetics are used for colouring concrete, bitumen, asphalt, tiles, bricks, ceramics and glass. They are also used extensively in house and marine paints. Because the shapes of the particles can be accurately controlled and the particle size distribution is narrow, synthetic iron oxides have a greater tinting strength than the natural ones and so, are chosen where paint colour is important, i. e., for top coats. Red iron oxides are used in primers for automobiles and steel structures. [Pg.514]

Watson, I. (1979) Iron oxide pigments. Colour-frd competitors between natural and synthetic. Minerals in Industry, Aug., 43—51 Watson, J.H.L., Cardell, R.R.Jr. Heller, W. (1962) The internal structure of colloidal crystals of P-FeOOH and remarks on their assemblies in Schiller layers. J. Phys. Chem. 66 1757-1763... [Pg.642]

The continually increasing importance of iron oxide pigments is based on their nontoxicity chemical stability wide variety of colors ranging from yellow, orange, red, brown, to black and low price. Natural and synthetic iron oxide pigments consist of well-defined compounds with known crystal structures [3.1] ... [Pg.83]

The economic importance of the natural iron oxide pigments has decreased in recent years in comparison with the synthetic materials. [Pg.85]

Iron oxide pigments produced from pure starting materials may be used as colorants for food and pharmaceutical products [3.42], Synthetic iron oxides do not contain crystalline silica and therefore are not considered to be toxic, even under strict Californian regulations. [Pg.91]

Accurate production figures for natural and synthetic iron oxide pigments are difficult to obtain, because statistics also include nonpigmentary oxides (e.g., red mud from bauxite treatment, intermediate products used in ferrite production). World production of synthetic iron oxides in 1995 was estimated to be 600000 t ... [Pg.93]

Table 24. Main areas of use for natural and synthetic iron oxide pigments... Table 24. Main areas of use for natural and synthetic iron oxide pigments...
Ferric oxide (Fe203) occurs naturally and is often used as a red pigment employed in paints and primers, as well as in rubber formulation. Because of durability, the iron oxide pigments are used in barn and freight car paints. The synthetic pigment is made by heating iron sulfate. [Pg.235]

About 70% of all iron oxide pigments are produced synthetically. Copperas or ferrous sulfate heptahydrate (FeS04-7H20) is the primary source of iron. It is a byproduct of the sulfate process for the manufacture of titanium dioxide as well as a by-product of pickling operations in the steel industry. Other sources of iron include ferric sulfate, ferrous chloride, ferric chloride, and the iron oxide slurry from the production of aniline by nitrobenzene reduction. [Pg.129]

Synthetic iron oxide Pigment red 101 Very slight... [Pg.333]

Will, R., Global Markets for Natural and Synthetic Iron Oxide Pigments, in Intertech Gonference, March, 2002, www.intertechusa.com... [Pg.158]


See other pages where Synthetic Iron Oxide Pigments is mentioned: [Pg.11]    [Pg.11]    [Pg.12]    [Pg.153]    [Pg.153]    [Pg.80]    [Pg.59]    [Pg.514]    [Pg.514]    [Pg.515]    [Pg.515]    [Pg.85]    [Pg.85]    [Pg.93]    [Pg.11]    [Pg.11]    [Pg.12]    [Pg.101]    [Pg.101]    [Pg.110]    [Pg.110]    [Pg.110]   
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