Business Account/page

You may create a business account if you don't already have a standard Facebook account. To get started, you will need to first create a Facebook Ad or Facebook Page.

Once you’ve entered in the required information, you will be taken to the "Facebook Login" page and asked if you have a Facebook account. If you do not currently have a Facebook account, then at this point, please select "I do not have a Facebook account." You will then need to enter your email address and date of birth.

Business accounts are designed for individuals who only want to use the site to administer Pages and their ad campaigns. For this reason, business accounts do not have the same functionality as personal accounts. Business accounts have limited access to information on the site. An individual with a business account can view all the Pages and Social Ads that they have created, however they will not be able to view the profiles (timelines) of users on the site or other content on the site that does not live on the Pages they administer. In addition, business accounts cannot be found in search, send or receive friend requests, or create/develop apps. Although they can be LIKED.

Depending upon your business, is a separate page the best thing for you? If it is, read on:

A Page can have multiple administrators. Each Page administrator will need to have their own business account or personal account. Every admin can manage the Page from their own Facebook account using the "Page Manager" application that will appear in the left hand column of the Applications section once they become an admin for a Page. Every admin has equal access to and the same abilities as the other admins for a Page.

So perhaps you want to begin again with your separate business advertisement page.  Do all of your homework first from the above link to Facebook Ads and Business Solutions.  You can find helpful suggestions at Zach's page, Set Up Your Company Facebook Page in 8 Easy Steps.  Just remember this is for a legal business entity.