<Li> Lubricants (produces light machine oils, motor oils, and greases, adding viscosity stabilizers as required), usually shipped in bulk to an offsite packaging plant . </Li> <Li> Wax (paraffin), used in the packaging of frozen foods, among others . May be shipped in bulk to a site to prepare as packaged blocks . </Li> <Li> Sulfur (or sulfuric acid), byproducts of sulfur removal from petroleum which may have up to a couple percent sulfur as organic sulfur - containing compounds . Sulfur and sulfuric acid are useful industrial materials . Sulfuric acid is usually prepared and shipped as the acid precursor oleum . </Li> <Li> Bulk tar shipping for offsite unit packaging for use in tar - and - gravel roofing . </Li>

When was last oil refinery built in us