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The Company is making definite contribution to the national economic development by producing the Import Substitute Pigment - Anatase Titanium Di-oxide. Besides R & D efforts are on to produce more value-added Titanium Pigment and bye-products.

We manufacture following products :
  • Titanium Dioxide (Anatase Grade)
  • Ferrous Sulphate Hepthahydrate (Copperas)
Titanium Dioxide ( Anatase Grade)  
A vital ingredient for diverse industrial applications, Titanium Dioxide is the most commonly-used white pigment in the world. More than four million tonnes are used annually for a variety of industrial applications like manufacturing of Paint, Rubber, Paper, Detergents, Cosmetics, Printing Inks, Textiles, Plastics among other products.

Titanium Dioxide is produced from Ilmenite, a mineral found in rich abundance in beach sands and hard rock. This material is treated to produce the Titanium Dioxide which is then milled to produce fine particles. A white powder that makes it possible to render true-to-life colours.

Titanium Dioxide
Titanium Dioxide (Percent by Mass) 98.0 (min) 98.25
Volatile Matter (Percent by Mass) 0.30 (max) 0.25
Matter Soluble in Water (Percent by Mass) 0.35 (max) 0.27
pH of Water Suspension (20% Slurry) 6.5 to 8.0 7.50
Specific Gravity 3.80 3.80
Oil Absorption g/100g 20 to 30 24
Tinting Strength 1200 (min) 1240
Residue on 325 Mesh (Percent by Mass) 0.1 (max) 0.08
Fe (ppm) 100 50
Dispersibility Freely Dispersible In Aqueous & Non-Aqueous Media
ferrous sulphate hepthahydrate (Copperas)  

Kilburn Chemicals Ltd is the major producer of copperas, with over a decade of experience supplying to various user industries.

Kilburn Chemicals produces Titanium Dioxide (Anatase) through sulphate process and copperas is produced as a bye-product after crystallization and separation from the process liquor.

ferrous sulphate hepthahydrate
Copperas is used as an additive in cement to minimize the risks of the harmful hexavalent chromium contained in cement. Kilburn Chemicals is able to supply copperas to cement manufacturers fulfilling the requirements of EU directive 76/769/EEC, 26th amendment. The directive demands the reduction of hexavalent chromium content to below 2 pm.

Copperas is also widely used as a coagulant in water treatment chemicals, and as a raw material for iron oxide pigments.

Ferrous Sulphate - Copperas Product Dry Product Drier
pH (5% of slurry) 3.10 (min) 3.10 (min)
Moisture (Percent by Mass) 0.50 (max) 0.40 (max)
Iron (Percent by Mass) 19.88 (min) 19.90 (min)
Purity as FSH (Percent by Mass) 98.70 (min) 98.80 (min)
Ferric Iron (Percent by Mass) 0.20 (max) 0.15 (max)
Free Acid (Percent by Mass) 0.30 (max) 0.25 (max)

COPPERAS - Advantages

Copperas is suggested for usage in the Cement Industry in order to reduce the hexavalent chromium content to below 2 ppm. To this effect, an EU directive has already come into force to protect workers during possible skin contact with hydrated cement.

Chromates can cause allergic dermatitis among workers coming into contact with the material. By adding copperas, the chromium is reduced to its trivalent, non-soluble form eliminating the harmful effects of chromium eczema.

Copperas is used as a coagulant in water treatment. Also it is used as a micro-nutrient via the fertilizer application in the Agriculture Industry.

How to use Copperas in Cement
  • Addition to grinding (Dose 0.3 - 0.6%) which gives uniform distribution. The addition is weight controlled.
  • Addition to grinding mill feed (Dose 0.5 - 1.00%). The addition is made separately or mixed with clinker or with other feed components.
  • Addition before packing (Dose ~ 0.5%) requires good or excellent mixing and is used in dry mortar and other cement preparation demands fine dust size particles of iron sulphate.
  • Wear normal protection
  • Store in a dry covered place
  • Avoid rain or moist conditions
  • Avoid dusting
  • Avoid high temperatures, melts at 650C
  • Classified as harmful, Xn, R22
  • Slightly acidic, corrosion possible
  • Changes colour as result of oxidation
  • Non-hazardous for transport on land
  • Non-IMO class on waters
  • Soluble in water
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