Sulfuric acid found in history discovered in the 8th century AD. Arab alchemist Jabir sulfate obtained by dry distillation of ferrous sulfate crystals. Some of the early research on the chemistry of people, such as Lacy, Jaber et al., Also wrote about the classified list of sulfuric acid and associated minerals; others, such as Ibn Sina that physician, is more attention to the type of sulfuric acid and their value in medicine. In the 17th century, the German chemist Johann Rudolf Glauber sulfur and potassium nitrate mixed steam heating system out of sulfuric acid plant in Ningbo, in this process, potassium nitrate and sulfur decomposition makes it can be mixed with water and becomes sulfuric trioxide sulfur (SO3). Thus, in 1736, Joshua Ward London pharmacists to develop large-scale use of this method of production of sulfuric acid. In 1746, John Roebuck then apply this principle, lead chamber method to create a more cost-effective mass production of sulfuric acid. After repeated improvements, this method has been used in industry for nearly two centuries. In the early 18th century, the production of sulfuric acid are dependent on the following methods: pyrite (FeS2) is burned into ferrous sulfate (FeSO4), and then is burned into the iron oxide can be decomposed into at 480 ℃ and can be used to make any concentration of sulfuric acid ferric trioxide [Fe2 (SO4) 3]. Unfortunately, the huge cost of this procedure prevented widespread use of concentrated sulfuric acid. By John Dalton in 1808 to draw early molecular sulfuric acid figure shows there is a sulfur atom in the center and the establishment of a covalent bond with three oxygen atoms. Later, in 1831, the British vinegar merchant Peregrine Phillips thought the contact method, can be manufactured at lower cost sulfur trioxide and sulfuric acid, this method has been widely used in today. In ancient China sulfuric acid plant, sulfuric acid is known as 'green vitriol oil'. In AD 650 to 683 years (Tang Emperor), the alchemists solitary just the child in his book "Yellow Emperor Shen Dan Jiuding by tactic" Juanjiu on the records of the 'Lianshi gall extract law', that carbonization gall stone (vitriol ) to obtain sulfuric acid. ① strong oxidizing metal reaction at room temperature, concentrated sulfuric acid to make iron, aluminum and other metals passivation. The main reason is the molecule of sulfuric acid and compounds of these metal atoms to form a dense oxide film, to prevent hydrogen ion or molecule with a metal sulfate to continue the reaction, such as iron is generally believed to generate Fe3O4. ② When heated, concentrated sulfuric acid, the reaction can be all metal except iridium, ruthenium, generating high metal sulfate itself is generally reduced to SO2. Hot concentrated sulfuric acid can be carbon, sulfur, phosphorus and other non-metallic elemental to its high oxidation state of oxide or oxygen-containing sulfuric acid plant in Tianjin itself is reduced to SO2. In this type of reaction, concentrated sulfuric acid showed only oxidation. ⑶ with other reducing reacting concentrated sulfuric acid with strong oxidizing, laboratory preparation of H2S, HBr, HI and other reducing gas can not use concentrated sulfuric acid to make desiccant. Hardly volatile (high boiling) hydrogen chloride, nitric acid, etc. (principle: hardly volatile acid from volatile acid) as, with solid sodium chloride and concentrated sulfuric acid from the reaction of hydrogen chloride gas. Again Hebei sulfuric acid plant, with concentrated hydrochloric acid and concentrated sulfuric acid can be prepared by hydrogen chloride gas. Use of the dehydration of concentrated sulfuric acid, concentrated hydrochloric acid in off the water. Acid system fertilizer, such as nitrogen, phosphorus and the like. Hebei sulfuric acid plant, sulfuric acid plant, Zhengzhou Longda Chemical provided by Zhengzhou Longda Chemical Products Limited. Zhengzhou Longda Chemical Products Co., Ltd. (www.longdahuagong.com/) strong, credible, in Zhengzhou, Henan chemicals industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Zhengzhou Ronda chemicals and you hand into the brilliant, for a better future!