1.Benzylidene acetone exports accounted for first in the country.

1.苄的出口量占全国第一。

2.Benzaldehyde and acetone used as materials,the benzylidene acetone is synthesized in the presence of potassium fluoride on alumina.

2.以苯甲和为原料,氟钾氧铝剂合成了苄。