refinery

It is said that there are four types of refineries. I have found on the Internet three types/groups, actually those mentioned first, second and fourth in the following passage. Can you perhaps, according to the description guess what is the name of the third refinery? I have translated it literally: the compound type.





Refineries are divided into four main groups, depending on the complexity of technological process, as follows: the simple refinery (only atmospheric destillation, catalytic reforming and the refinement process), the compund type of refinery (atmospheric destillation, catalytic reformning, the refinement process, vacuum destillation and catalytic cracking), the complex refinery (with a wide assortment of products, including the production of lubricating oils), the petrochemical refinery (in addition to everyting else, it includes petrochemical plants, for obtaining, for example, aromatic hydrocarbons.)