How can I stop Facebook sending friend suggestions to my business account from my personal friend list, as both are on my iphone &I switch?

Between the two. Now many on my friends list have been sent requests which I never wanted to happen. Really annoying! How can this be stopped as I'm not even friends with my business page Facebook account?

You can't. Your business page is attached to your personal account. Facebook requires people to have personal page in order to start a business page for administrative reasons. If your personal page is active then Facebook will use its friend list to promote activity to your business page.