Patent ID: 8916127

Claim:
A method for making sulfuric acid, suitable for producing a sulfuric acid product, comprising the following steps: a. providing solid sulfur; b. melting the solid sulfur in a sulfur melting tank to form liquid sulfur; c. burning the liquid sulfur to generate at least a sulfur product; d. recycling high order heat energy generated from burning the liquid sulfur; e. providing the high order heat energy to a first distillation tower or a second distillation tower; f. recycling low order heat energy generated from burning the liquid sulfur; g. providing the low order heat energy to the sulfur melting tank; h. providing hydrogen peroxide or sulfuric acid containing hydrogen peroxide into an absorption-reaction tower to react with the sulfur product to produce the sulfuric acid product; i. concentrating the sulfuric acid product to improve the concentration of the sulfuric acid product; j. purifying the sulfuric acid product to improve the purity of the sulfuric acid product; k. removing sulfur dioxide in the sulfuric acid product by a stripping tower if sulfur dioxide content in the sulfuric acid product is too high; and l. bottling and storing each grade sulfuric acid product.