公开(公告)号：US20050180912A1

公开(公告)日：2005-08-18

申请号：US11077775

申请日：2005-03-11

Applicant: Djamschid Amirzadeh-Asl ,  Jurgen Bauml ,  Udo Selter

Inventor： Djamschid Amirzadeh-Asl ,  Jurgen Bauml ,  Udo Selter

IPC: C01F11/46 ,  C01F5/42

CPC classification number: C01F11/462 ,  C01P2004/10 ,  C01P2004/20 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2004/62

Abstract: This patent describes the use of barium sulfate as filler for thermosetting and thermoplastic plastics, elastomers, sealants, adhesives, fillers, varnishes, paints, paper, glass and as substrate for coloured pigment formulations as well as for single-layer or multilayer coatings consisting of metal oxides, metal oxide mixtures and/or metal compounds, as a nucleus of crystallisation for lead sulfate in the negative electrode paste of lead accumulators and as an X-ray contrast medium, the barium sulfate being produced by a continuous process wherein a barium salt solution and a sulfate solution are simultaneously and continuously brought together in equimolar quantities in a precipitating suspension at a temperature of 30 to 90° C., with constant stirring, the precipitating suspension is withdrawn continuously in a steady volume and the barium sulfate precipitate is filtered, washed and optionally dried, wherein the barium salt solution has a concentration of 0.1 to 0.8 Ba2+ mol/l and the sulfuric acid has a concentration of 0.1 to 2.0 SO42− mol/l, and the flow rate and stirring speed are controlled, at a constant precipitation volume, in such a way that a pH value of 1 to 5 is obtained in the precipitating suspension, and the lamellar barium sulfate particles produced as result of the precipitation are 0.1 to 50 μm wide, 0.1 to 50 μm long and 0.1 to 2 μm thick and the needle-shaped particles produced as result of the precipitation are 1 to 50 μm long and 0.1 to 2 μm thick, the ratio of length or width to the thickness being 3:1 to 500:1.

Abstract translation: 该专利描述了硫酸钡作为热固性和热塑性塑料，弹性体，密封剂，粘合剂，填料，清漆，油漆，纸，玻璃以及用作有色颜料配方的底物以及用于单层或多层涂料的填料的使用 金属氧化物，金属氧化物混合物和/或金属化合物，作为铅蓄电池的负极糊料中硫酸铅的结晶核和作为X射线造影剂，所述硫酸钡通过连续方法制备，其中钡盐 溶液和硫酸盐溶液以等摩尔量在沉淀悬浮液中在30至90℃的温度下同时并连续地连续，在恒定搅拌下，将沉淀的悬浮液以稳定的体积连续取出，并将硫酸钡沉淀物过滤 洗涤并任选地干燥，其中钡盐溶液的浓度为0.1至0.8巴2 + mol / l，硫酸的浓度为0.1〜2.0SO 2 - 2 - / - mol / l，流速和搅拌速度控制在恒定的沉淀 体积，使得在沉淀悬浮液中得到1〜5的pH值，由沉淀产生的层状硫酸钡粒子为0.1〜50μm，宽0.1〜50μm，0.1〜2μm 由于沉淀而产生的针状颗粒长度为1〜50μm，厚度为0.1〜2μm，长度或宽度的比例为3:1〜500:1。

公开(公告)号：US07501110B2

公开(公告)日：2009-03-10

申请号：US11077775

申请日：2005-03-11

Applicant: Djamschid Amirzadeh-Asl ,  Jürgen Bäuml ,  Udo Selter

Inventor： Djamschid Amirzadeh-Asl ,  Jürgen Bäuml ,  Udo Selter

IPC: C01F5/42

CPC classification number: C01F11/462 ,  C01P2004/10 ,  C01P2004/20 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2004/62

Abstract: This patent describes the use of barium sulfate as filler for thermosetting and thermoplastic plastics, elastomers, sealants, adhesives, fillers, varnishes, paints, paper, glass and as substrate for colored pigment formulations as well as for single-layer or multilayer coatings consisting of metal oxides, metal oxide mixtures and/or metal compounds, as a nucleus of crystallization for lead sulfate in the negative electrode paste of lead accumulators and as an X-ray contrast medium, the barium sulfate being produced by a continuous process wherein a barium salt solution and a sulfate solution are simultaneously and continuously brought together in equimolar quantities in a precipitating suspension at a temperature of 30 to 90° C., with constant stirring, the precipitating suspension is withdrawn continuously in a steady volume and the barium sulfate precipitate is filtered, washed and optionally dried, wherein the barium salt solution has a concentration of 0.1 to 0.8 Ba2+ mol/l and the sulfuric acid has a concentration of 0.1 to 2.0 SO42− mol/l, and the flow rate and stirring speed are controlled, at a constant precipitation volume, in such a way that a pH value of 1 to 5 is obtained in the precipitating suspension, and the lamellar barium sulfate particles produced as result of the precipitation are 0.1 to 50 μm wide, 0.1 to 50 μm long and 0.1 to 2 μm thick and the needle-shaped particles produced as result of the precipitation are 1 to 50 μm long and 0.1 to 2 μm thick, the ratio of length or width to the thickness being 3:1 to 500:1.

Abstract translation: 该专利描述了硫酸钡作为热固性和热塑性塑料，弹性体，密封剂，粘合剂，填料，清漆，油漆，纸，玻璃以及用作有色颜料配方的底物以及用于单层或多层涂层 金属氧化物，金属氧化物混合物和/或金属化合物，作为铅蓄电池的负极糊料中的硫酸铅的结晶核，作为X射线造影剂，所述硫酸钡是通过连续方法生产的，其中钡盐 溶液和硫酸盐溶液以等摩尔量在沉淀悬浮液中在30至90℃的温度下同时并连续地连续，在恒定搅拌下，将沉淀的悬浮液以稳定的体积连续取出，并将硫酸钡沉淀物过滤 洗涤并任选地干燥，其中钡盐溶液的浓度为0.1至0.8Ba 2 + mol / l和th e硫酸的浓度为0.1〜2.0 SO42- mol / l，流速和搅拌速度以恒定的沉淀体积控制，使得在沉淀悬浮液中获得1〜5的pH值 ，沉淀结果产生的层状硫酸钡粒子为0.1〜50μm，宽度为0.1〜50μm，厚度为0.1〜2μm，由于沉淀而生成的针状粒子长度为1〜50μm， 0.1至2μm厚，长度或宽度与厚度之比为3:1至500:1。