Litharge (PbO)

Litharge (PbO)

Litharge, PbO, exists in a reddish alpha form up to 489 0C; it then transforms to a yellow beta form (massicot), which is stable at high temperatures. Lead oxides are produced industrially by thermal processes in which lead is directly oxidized with air.

In the ball mill process, metallic lead balls are tumbled in air to produce a “leady” oxide, which typically contains 20 – 35% free lead.

The Barton pot process oxidizes droplets of molten lead at ca. 430 0C to produce either litharge or leady litharge.

We have manufacturing plant based on both the above mentioned processes to manufacture litharge.

Packing Specifications
Litharge is available in 25 kg HDPE bags.

Uses

Litharge is used:

– in the manufacture of pastes for the grids used in lead – acid batteries.

– in optical, electrical, and electronic glasses, as well as in glazes for fine tableware.

– in rubber as a vulcanizing agent

– in lead soaps employed as driers

– in varnishes

vin high-temperature lubricants

– as a neutralizing agent in organic syntheses

– as a heat stabilizer in plastics

– as a starting material in the production of pigments

Technical Specifications

S.No.
Properties
Litharge
1.
 Chemical Formula
 PbO
2.
 Colour
 Canary Yellow
3.
 Crystal Structure
 Orthorohmbic
4.
 Apparent Density (Scott.) gm/Cm3
 1.8-22
5.
 Residue on 63 micron Sieve Max.
 0.1%
6.
 Specific Gravity 9.6-9.9
7.
 Wt / Volume ml. / gms. 0.4-0.45
8.
 Petrol Subsidence ml./gm. 0.45-0.42
9.
 Water Absorption mg./gm. 90-100
10.
 Acid Absorption mg./gm. 80-100
11.
 Volatile Matter, Max. 0.1%
12.
 Insoluble in Acetic Acid, Max 0.01%
13.
 Total Lead Oxide, Min. 99.7%
14.
 Free Lead, Max. 0.01%
15.
 PbO2 Max. 0.001%
16.
 Pb3O4 Max. 0.01%
17.
 Moisture Content, Max 0.05%