I'm not sure if this is a bug or not.
I noticed that the Leaching Plant Recipes for chunks are looking for the base game sulfuric-acid, however all my other recipes are looking for liquid-sulfuric-acid. I made to make the following change to bobsangelthon-refining-recipe.lua.
line: 39
data.raw.recipe["angelsore"..i.."-crystal"].ingredients = {{type="item", name="angels-ore"..i.."-chunk", amount=8}, {type="fluid", name="liquid-sulfuric-acid", amount=0.5}}
Flush recipe:
/c game.player.force.reset_recipes()