Publishing a work which is not related to the work done in the company
I used "Independent Researcher" and personal email address two times for my papers: published at good venues without any affiliation-related problems.

And depending on your local laws, the company policies, nature of your research, how you conducted it (normal working hours or weekends, use of company equipment) you may not own the research results and may need to work with the company on publishing it using the company's affiliation.