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1. 发明公开

EP0140644A2 Calcium carbonate in a platelet-like particulate form and a method for the preparation thereof 失效
标题翻译： Plättchenartiges，teilchenförmigesCalciumkarbonat und Verfahren zu seiner Herstellung。
公开(公告)号：EP0140644A2
公开(公告)日：1985-05-08
申请号：EP84307106.9
申请日：1984-10-17
申请人： OKUTAMA KOGYO KABUSHIKI KAISHA
发明人： Tanaka, Hiroichi , Matsukawa, Masanori , Takeshi, Akira
IPC分类号： C01F11/18 , C09C1/02
CPC分类号： C01F11/181 , C01P2004/20 , C01P2004/62 , C01P2006/22 , C09C1/021
摘要： A method for the preparation of a calcium carbonate powder of which the particles have a platelet-like particulate configuration and which is useful as a pigment or filler in various products with superiority to kaolin clays and mica powders. The method is a two-step carbonation method of a milk of lime of which the first step is performed by blowing carbon dioxide into the milk of lime until 10 to 70% of the calcium hydroxide is carbonated and the second step is performed by admixing the thus partially carbonated milk of lime with an aqueous carbonating solution containing an alkali metal carbonate or ammonium carbonate and an alkali metal hydroxide or ammonium hydroxide in specified concentrations to complete the carbonation of the calcium hydroxide. The first step carbonation is preferably preceded by a pretreatment of the milk of lime in which the milk of lime is subjected to shearing disintegration of the calcium hydroxide particles to cause a substantial increase of the viscosity up to a specified extent.
摘要翻译：一种制备碳酸钙粉末的方法，其中颗粒具有片状颗粒构型，并且可用于具有优于高岭土和云母粉末的各种产品中的颜料或填料。该方法是石灰乳的两步碳酸化方法，其中第一步是通过将二氧化碳吹入石灰乳中进行，直到10至70％的氢氧化钙被碳酸化，第二步是通过混合从而将含有碱金属碳酸盐或碳酸铵的碳酸氢盐水溶液和特定浓度的碱金属氢氧化物或氢氧化铵的含水碳酸酯溶液部分碳酸化，以完成氢氧化钙的碳酸化。优选首先进行碳酸化之前，其中对石灰乳进行预处理，其中石灰乳进行氢氧化钙颗粒的剪切分解，使粘度显着增加至特定程度。

2. 发明公开

EP0140644A3 Calcium carbonate in a platelet-like particulate form and a method for the preparation thereof 失效
标题翻译：类似片状碳酸钙的碳酸钙及其制备方法
公开(公告)号：EP0140644A3
公开(公告)日：1987-01-21
申请号：EP84307106
申请日：1984-10-17
申请人： OKUTAMA KOGYO KABUSHIKI KAISHA
发明人： Tanaka, Hiroichi , Matsukawa, Masanori , Takeshi, Akira
IPC分类号： C01F11/18 , C09C01/02
CPC分类号： C01F11/181 , C01P2004/20 , C01P2004/62 , C01P2006/22 , C09C1/021
摘要： A method for the preparation of a calcium carbonate powder of which the particles have a platelet-like particulate configuration and which is useful as a pigment or filler in various products with superiority to kaolin clays and mica powders. The method is a two-step carbonation method of a milk of lime of which the first step is performed by blowing carbon dioxide into the milk of lime until 10 to 70% of the calcium hydroxide is carbonated and the second step is performed by admixing the thus partially carbonated milk of lime with an aqueous carbonating solution containing an alkali metal carbonate or ammonium carbonate and an alkali metal hydroxide or ammonium hydroxide in specified concentrations to complete the carbonation of the calcium hydroxide. The first step carbonation is preferably preceded by a pretreatment of the milk of lime in which the milk of lime is subjected to shearing disintegration of the calcium hydroxide particles to cause a substantial increase of the viscosity up to a specified extent.

3. 发明授权

EP0140644B1 Calcium carbonate in a platelet-like particulate form and a method for the preparation thereof 失效
标题翻译：类似片状碳酸钙的碳酸钙及其制备方法
公开(公告)号：EP0140644B1
公开(公告)日：1990-07-11
申请号：EP84307106.9
申请日：1984-10-17
申请人： OKUTAMA KOGYO KABUSHIKI KAISHA
发明人： Tanaka, Hiroichi , Matsukawa, Masanori , Takeshi, Akira
IPC分类号： C01F11/18 , C09C1/02
CPC分类号： C01F11/181 , C01P2004/20 , C01P2004/62 , C01P2006/22 , C09C1/021

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