Abstract
As already reported, for the manufacture of fish oil into a chlorination product an oil after polymerization is rather suited, insofar as it remaines soluble in organic solvents, as compared with an oil before polymerization. In this point of view, the conditions that favor the polymerization were studied through experiments wherein a few kinds of fish oil were heated at 150-1700°C under reflux in the application of di-t-butyl peroxide as polymerizing agent.
From the results obtained it was inferred that some volatile matters usually present in raw fish oil, including a small amount of water, are possible to obstruct the rise of reaction temperature and hence the advance of polymerization. This inference made a good hit when polymerization was actually carried out with success by using samples of fish oil previously well aerated with air and/or nitrogen gas.
Since aeration with air gave rise to increases of acid value and peroxide value, which also proved in this study to do no good to the polymerization, aeration with nitrogen is considered as a recommendable method of removing the volatile matters from the fish oil to be chlorinated.
