公开(公告)号：WO2016115386A1

公开(公告)日：2016-07-21

申请号：PCT/US2016/013469

申请日：2016-01-14

Applicant: IMERYS PIGMENTS, INC.

Inventor： PAYNTER, Christopher ,  STOVALL, Kalena ,  WICKS, Douglas ,  BUTLER-LEE, Gavin ,  GOLBAYANI, Parvin ,  JARVIS, Nigel, Victor ,  PRING, Graham, M ,  TAYLOR, David ,  PEREZ, Ricardo, M.

IPC: D21H17/67 ,  C08C1/02 ,  C01F11/18

CPC classification number: C01F11/181 ,  B01D53/501 ,  B01D2251/404 ,  B01D2251/606 ,  C01F5/24 ,  C01F5/40 ,  C01F11/182 ,  C01F11/183 ,  C01F11/185 ,  C01F11/464 ,  C01F11/468 ,  C01P2004/03 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/12 ,  C01P2006/80 ,  C04B14/28 ,  C09C1/021 ,  D21H17/67 ,  D21H17/675

Abstract: A process for converting gypsum into precipitated calcium carbonate including reacting a mixture comprising gypsum and a seed, a mineral acid, or both with at least one carbonate source, whereby precipitated calcium carbonate is produced in the form of calcite and/or aragonite directly without conversion from a vaterite polymorph. Also, a process for converting gypsum into precipitated calcium carbonate including providing a mixture comprising i) gypsum ii) a seed, a mineral acid, or both iii) at least one additive selected from the group consisting of ammonium sulfate, an organic acid, or an iron material, and reacting the mixture with at least one carbonate source to produce precipitated calcium carbonate in the form of vaterite.

Abstract translation: 一种将石膏转化成沉淀碳酸钙的方法，包括使包含石膏和种子，无机酸或两者的混合物与至少一种碳酸盐源反应，由此沉淀的碳酸钙以方解石和/或文石的形式直接生成而不转化 来自球霰多晶型 另外，一种将石膏转化为沉淀碳酸钙的方法，包括提供混合物，其包括i）石膏ii）种子，无机酸或两者，iii）至少一种选自硫酸铵，有机酸或 铁材料，并使混合物与至少一种碳酸盐源反应，以产生球霰石形式的沉淀碳酸钙。