process mapping example

The solution containing the mixture is taken in a china dish and heated gently. Gradually the solvent evaporates and the solution containing the dissolved solute becomes thicker. The semi-solid mass left on the china dish is slowly heated to dryness. Fig: 1.3 - Evaporation of a soluti..

. Differential extraction becomes more effective if the process is repeated a number of times using a small volume of the organic solvent each time, than by using the whole solvent in one lot, i.e. multiple extraction is more efficient than single extraction. For example, iodine..

A magnet is moved over the mixture containing the magnetic substance e.g., iron filings. These get attracted to the magnet. The process is repeated until the magnetic material is completely separated from the mixture. Fig: 1.4 - Separation of a magnetic substance by a magn..

The clay is first washed with water in wash mill to remove the foreign materials. Powdered lime is added to clay and the mixture is finely ground and homogenised. The clay-lime slurry (40% water present) or the dry pulverized mixture (in the case of dry process) is introduced into..

The mixture is taken in a container and allowed to stand for sometime. The solid particles settle down with time. Settling down of the particles leaves the upper layers of the liquid clearer. Bigger particles settle down faster than the finer particles. Sometimes the sedimentation process..

The mixture is taken in a china dish covered with a wire guaze. An inverted glass funnel is placed on this to collect the vapors. Sometimes a perforated asbestos sheet is placed between the china dish and the funnel. The stem of the funnel is plugged with a little cotton and the sides are kept coo..

The process of electroplating involves the following steps: Before electroplating the metal surface is cleaned thoroughly. Firstly, an alkaline solution is used to remove grease and then it is treated with acid to remove any oxide layer. It is then washed with water. The article to ..

The Bessemer converter is turned into a horizontal position and molten pig iron is poured into it. A blast of hot air is sent through the tuyeres. The converter is rotated so that it is vertical and hot air is blown continuously. In its upward travel through the converter, the air oxidises the im..

The metal to be refined is placed over the sloping hearth of a furnace The temperature of the furnace is maintained slightly above the melting point of the metal Pure metal melt and flow down Impurities, having higher melting point, are left behin..

A block of impure metal is made the anode of an electrolytic cell containing an aqueous solution of the metal salt A thin sheet of pure metal is made the cathode of the electrolytic cell When electric current of a suitable voltage is passed, metal ions from the electrolyte get deposited on ..