Abstract
For the purpose of preventing alkaline scale from the concentration of sea water, the effect of 13 kinds of additives on the formation of alkaline scale was studied under the following conditions:(1) Apparatus; small evaporator,(2) Brine concentration; CF 2,(3) Temperature; 101°C (1 atm., b. p.). The results were as follows:
1) Sodium poly phosphate and sodium poly acrylate pruned to be effective on the scale prevention, and this effect was brought about by their inhibition of scale forming constituents.
2) The effect of sodium poly acryl ate for preventing alkaline scale was changed by the polymerisation grade, and the low polymerisation grade such as p. g. 75,100 pruned to be most effective.
