1. Allyl isothiocyanate can also be liberated by dry distillation of the seeds.

2. — actual methylene, that is to say raw methyl alcohol produced from the dry distillation of wood and containing at least 10 % by weight of acetone,

3. This method includes the following steps: mixing the waste grease from which the impurity has been removed by pressure filtration and diesel oil according to certain ratio to obtain mixed fuel which can be used as the fuel of dry distillation, dry distilling the biochemical sludge under the airproof condition of no oxygen, no combustion and high temperature.

4. Biallyl has been prepared by the action of sodium 5 or aluminum 6 on allyl iodide; from allyl mercuric iodide by dry distillation 7 or by the action of potassium cyanide solution; 8 by the action of magnesium on allyl bromide, 4, 9 allyl chloride, 4, 10 allyl iodide, 11 or 1,2,3-tribromopropane; 12 and from diallyl ether by the action of sodium