The chief executive of Bulknet.com will shortly close a $25-$30 million round of financing for his month-old Internet site, which he hopes will dominate online bookings for chemicals shipping. Mark Bitting said the financing, following an initial round that raised less than $1 million, should give the company a big head start on Internet competitors hoping to capture some of the multi-billion dollar chemical shipping market. "We're the only ones in this industry that have attacked e-commerce," he said, but added that he expects steep competition down the road given the number of other "dot-com" companies out there putting money into systems. The company has signed up 41 of the largest U.S.