Sharplex Filters [India] Pvt. Ltd. Offers Molten Sulphur Filter. Sharplex Filters [India] Pvt. Ltd. Is a BS EN ISO 9001:2000 certified company. The Molten Sulphur Filter is used for Molten Sulphur Filtration used in sulphuric acid and sulphonation plants. This filter is available in two designs like Shell retraction design and Bundle retraction design. This Molten Sulphur Filter features filtration area ranging from 5 m² to 200 m².