. Extraction dehydration hydrazine hydrate solution fractionated distilled water associated oxygen factory, until the water, hydrazine up azeotrope (68% hydrazine) linking oxygen reducing agent, the solution was the second fractionation, aniline to change its boiling point linking oxygen organic dye, will aniline and water evaporated from the water condensate recovered aniline can return recycled, secondary fractionation was then fractionated by three times to prepare anhydrous hydrazine. For the manufacture of isoniazid, photographic developing agent, jet fuel, rocket fuel, antioxidants, reducing agents, high-pressure boiler feed water hydrazine deoxidizer: A Brief History of editing nitrogen found in 1772 by the Swedish chemist Scheler found after determined by the French scientist Lavoisier is an element. 1787 by the Lavoisier and other French scientists, the English name of nitrogen nitrogen, is' composed by saltpeter "means. China in the late Qing Dynasty chemist enlightenment Shou first time nitrogen translated into Chinese had written as" light gas "oxygen-linked, meaning that it" dilutes "the oxygen in the air. Element name comes from the Greek, meaning" saltpeter. "United oxygen _ Connaught Chemical pesticides (certified) _ United oxygen by the Qingdao-Connaught Chemical Limited. Qingdao Connaught Chemical Co., Ltd. (www.qdweinuo.com) is in Qingdao, Shandong, chemical products leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Connaught Chemical leadership with the staff warmly welcome all inquiries negotiations to create Connaught chemical better future.