I presume that your son is a rising junior, so he will have essentially a year and a half to visit colleges. I agree with the poster above about visiting colleges when they are in session, so your son can see each respective study body and determine whether he can see himself as part of that student body. So you should have your Fall Break, President’s Day weekend, and Spring Break of junior year, plus Fall Break of senior year, in which to get your on-site visiting done. Not knowing which state you live in, it’s hard to say where you should start your travels. Here are some links that might be helpful in this regard: http://collegeapps.about.com/od/choosingacollege/tp/8-Tips-for-a-Campus-Visit.htm; http://youngadults.about.com/od/collegeprep/a/collegevisit.htm
In terms of what other schools to consider, here is a site that might be helpful: http://best-engineering-colleges.com/chemical-engineering. There are links on the site to other subfields of engineering, also. I know nothing about the methodology of the ranking system on this site either; but it may give you some ideas for other schools to investigate which someone has identified as having good chemical engineering programs.
As the above poster also mentioned, any guesses on whether your son would stand a chance of admission and/or financial assistance (merit or otherwise) at the schools you identified would, at this point, be only that – guesses – without more information about his SAT/ACT scores.
FInally, you will need to consider the financial aspect very carefully, in terms of how much your family can afford versus what you are looking to the college to fund.