“Chemical and Process Engineering” has also a (legitimate) website here, on an official PAN domain:
http://cpe.czasopisma.pan.pl/index.php?option=com_content&view=article&id=31&Itemid=136
(Polish version)
Please note differences between contact information:
http://processengineering.net/contact-us/ (hijacked)
http://cpe.czasopisma.pan.pl/index.php?option=com_content&view=article&id=31&Itemid=136#kontakt (legitimate)
The postal address in Warsaw is the same in both cases, but the hijacked version provides (expectedly) different email and, notably, a phone number, which is altogether absent in the legitimate website. Note that first two digits after the country code of the phone number are 42, which is code for the city of Lodz (Łódź), not for Warsaw.