According to the volatile hydrogen chloride is easy soluble in water characteristics test dilute hydrochloric acid and ferrous chloride in hydrochloric acid solution, the solubility of the law, the use of indirect steam heating, vacuum evaporation concentration process, the gas produced by the evaporation condenser condensed into dilute hydrochloric acid dilute hydrochloric acid, again returns pickling plant; spent acid is concentrated by evaporation ferrous chloride concentration reaches a certain soda dilute hydrochloric acid, concentrated liquid is cooled so that crystals in the form of ferrous chloride to precipitate, and then centrifuged to obtain chloride ferrous crystals. 1. The use of vacuum evaporation process hydrochloric acid pickle liquor, technically sound, economically viable, suitable for medium and small-scale iron and steel enterprises hydrochloric acid waste utilization. 2. Due to the reduced evaporation temperature vacuum evaporation, so the purchase of equipment to extend the service life of diluted hydrochloric acid, reducing repair and maintenance costs of the equipment. 3. The energy consumption of less value hydrochloric acid regeneration recovery process may be set off against the cost, so that the processing system can continue to run. The small number of necessary equipment, low investment, and the operation is simple, it is suitable for use in hydrochloric acid pickling, cold-rolled strip of small businesses. Cyproterone ethinyl Chinese name: cyproterone acetylene English name: Cyclopropyl acetylene Synonyms: No. CyclopropylacetyleneCAS: 6746-94-7 Formula: C5H6 Molecular Weight: 66.10 Physical and chemical properties Density: 0.85 g / cm3 Boiling point: 31.4 ℃ at 760 mmHg Flash point: -5 ℃ medicinal dilute hydrochloric acid | Zhengzhou Longda Chemical | dilute hydrochloric acid provided by the Zhengzhou Longda Chemical Products Limited. Zhengzhou Longda Chemical Products Co., Ltd. (www.longdahuagong.com/) is a leader in Zhengzhou, Henan Province, chemical reagents, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Zhengzhou Longda Chemical leadership with the staff warmly welcome all inquiries negotiations to create the Zhengzhou Longda Chemical better future.