You can enable unlimited amount of completely separate catalogs. Each catalog will have separate product categories, WordPress menu and settings.
To set the number of additional product catalogs to enable please go to Product Settings > Multiple Catalogs and set the number in the first section.
Press Update button when you set the desired number of additional product catalogs. After the Number of additional catalogs is set the settings will appear below the field.
The settings allow to set catalog name, separate product listing page, categories parent URL, breadcrumbs for every product catalog.