Mixed diisopropyl benzene was chose as the materials to compose high purity resorcinol by shapeselective catalysis decomposition and vacuum distillation.
以混合二异丙苯为原料经择形催化裂解和减压蒸馏,制备了高含量的间二异丙苯。
2
Although the number of bones is roughly the same in all breeds, there is considerable variation in the size and shape of individual bones, as the result of selective breeding.