| 摘要 |
<p>A high-temperature organic magnetite is prepared in reaction of 1 mole of aqueous ethyl alcoholic solution of 2,3-indolindione-3-thiosemicarbazone heated up to 70 degrees Celsius reacting with 1 mole of an aqueous solution of alk. metal hydroxide. A pH value of the reaction mixture is adjusted to a value of from 11,2 to 12,2. The said mixture is added with 0,5 mole of the ferrous salt in the sulphur or chloride form. The formed coagulum is heated up to from 90 to 95 degrees Celsius in the elapse of 0,5 to 1,5 hours. Once the coagulum is cooled down, it is filtrated and washed with from 50 to 60 percent of the aqueous ethyl alcoholic solution having a pH value from 11,2 to 12,2. The isolated coagulum is recrystallised and dried at temperature of from 105 to 125 degrees Celsius.</p> |
