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Researchers: Abd Rahman Abd Aziz and Nasharuddin Isa

In conventional practice to produce PCC, the carbonation process is carried out by batches in a huge tank at one time. However, it takes longer times to carry out the carbonation process by batches due to low solubility of the calcium hydroxide in water. This would lead to low amount of produced PCC and also time consuming, that is less suitable for commercial production purpose. Therefore, this apparatus was designed for continuous process of producing PCC. Basically, the apparatus consists of a recarbonation cylindrical chamber with small orifices on the side of the cylinder to create air turbulence in the chamber. The solution of calcium ions (lime solution) was introduced into the reaction chamber using atomizing spray to convert the solution into atomizing droplets or mist which may speed up the recarbonation process. Compressed air will create air turbulence when it enters  into the reaction chamber through the orifices making the recarbonation process to complete within shorter times.

Advantages: The apparatus is able to continuously produce precipitated calcium carbonate.

Novelty: Reaction chamber for producing PCC almost instantly.

Invention: Filing the Patent with IP No. Pl 2012004692

Commercialisation: Ready to be commercialised.

Contact:

Dr. Rohaya Othman

Tel. : +605 - 5477052
Fax : +605 - 5477185

Researchers: Abd Rahman Abd Aziz and Nasharuddin Isa

User Rating: 2 / 5

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In-situ technique is a process where the carbonation to produce precipitated calcium carbonate (PCC) and the impregnation step to introduce PCC to the pulp occur simultaneously. PCC is a wel-known filler to be used in paper besides clay, Si02 and ground calcium carbonate (GCC). Generally, high grade limestone is required to manufacture PCC and need to be produced initially before impregnation process in paper making. In in-situ technique the ionic solution is required to produce PCC where it can be prepared by using any form of calcium-based material that mixed together with sucrose solution and the undissolved solids are filtered to get the ionic solution. In this study, the calcium-based industrial waste such as carbide lime is used as raw material in preparing the ionic solution and subsequently to produce PCC. This technique is predicted to be popular in future, hence create more new players in the industries.

Advantages: Combined steps that reduce total time and cost and unlimited grad'e of limestone resources to be used as raw material as well as calcium-based industrial waste.

Novelty: The in-situ technique in preparing PCC loaded pulp for paper making.

Invention: Filing the Paten with IP number Pl 2014703714

Commercialisation: Ready to be commercialised.

Contact:

Dr. Rohaya Othman

Tel. : +605 - 5477052
Fax : +605 - 5477185

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