Arkema SA is nearing a deal to acquire a ArrMaz Custom Chemicals Inc., the Mulberry, Fla.-based supplier of mining chemicals from Golden Gate Capital for about $550 million, according to a Bloomberg report, citing people with knowledge of the situation. The French chemical maker’s negotiations with the private equity firm are at an advanced stage and a deal could be announced as early as this week, though it could still fall apart said the sources. Within the fertilizer industry ArrMaz is particularly known for the chemicals it supplies the phosphate industry.