Procedure for the simultaneous Recovery and use of sulfuric acid and Gypsum is obtained in the production of Phosphoric Acid from phosphate and sulfuric acids.

• 1. 回收利用钛白粉生产过程中产生的废硫酸、酸性废水生产磷酸的方法 [P] . 中国专利： CN113292055A . 2021-08-24
• 2. 一种利用氰尿酸生产过程中的废酸液回收硫酸铵的工艺及其使用的设备 [P] . 中国专利： CN101734813B . 2012.01.11
• 3. Process for the recovery and the simultaneous use of sulphuric acid obtained in the state of the gypsum during the manufacture of phosphoric acid from of phosphates and sulfuric acid. [P] . 法国专利： FR672811A . 1930-01-07

  机译： 在由磷酸盐和硫酸制造磷酸的过程中，回收并同时使用以石膏状态获得的硫酸的方法。

• 4. process for the production of phosphoric acid and sulphuric acid from calciumphosphaten under recovery and reclamation of the waste sulfuric acid and gypsum. [P] . 瑞士专利： CH143694A . 1930-11-30

  机译： 回收废硫酸和石膏的过程中，由磷酸钙生产磷酸和硫酸的方法。

• 5. Method of purification of residual gypsum from the production of phosphoric acid by sulfuric acid digestion of natural phosphates [P] . BE660216A . 1965-06-16

  机译： 通过天然磷酸的硫酸消化从磷酸生产中纯化残留石膏的方法

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• 5. Extraction Behavior of Technetium(VII) From Chromate Solutions of Sulfuric, Perchloric and Phosphoric Acids into Bis (2-Ethylhexyl) Hydrogen Phosphate (HDEHP) [R] . Wood, R. A., Wakakuwa, S. T., MacDonald, N. S. 1972

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