公开(公告)号：US3911079A

公开(公告)日：1975-10-07

申请号：US45145474

申请日：1974-03-15

Applicant: RHONE PROGIL

Inventor： GIELLY JEAN-FRANCOIS

IPC: C01B25/22 ,  C01F11/46 ,  C01F1/00 ,  C01B25/16 ,  C01F5/00

CPC classification number: C01F11/46 ,  C01B25/22

Abstract: The production of phosphoric acid and calcium sulphate by reacting calcium phosphate and sulphuric acid in a continuous operation in a plurality of successively arranged reaction zones with the calcium phosphate and sulphuric acid distributed between the zones, filtering the slurry from each reaction zone and washing the filtered solids with water, returning the major portion of the acidified wash water into the first reaction zone and introducing the filtrate from each reaction zone to the succeeding reaction zone so that the P2O5 concentration increases in the succeeding reaction zones, and then collecting and removing the phosphoric acid product from the last reaction zone.

Abstract translation: 通过在多个连续排列的反应区中连续操作磷酸钙和硫酸生产磷酸和硫酸钙，磷酸钙和硫酸分布在各区之间，从每个反应区过滤浆液并洗涤过滤的 固体用水，将大部分酸化的洗涤水返回到第一反应区，并将滤液从每个反应区引入后续的反应区，使得随后的反应区中的P2O5浓度增加，然后收集和除去磷 最后一个反应区的酸产物。