发明名称 |
PROCEDE DE SEPARATION DU CARBONATE DE CALCIUM CONTENU DANS DES BOUES DE DESENCRAGE |
摘要 |
<p>The process enables the reuse of calcium carbonate from recycled (white water) from manufacturing machines, filtration and treatment with carbon dioxide to form the bicarbonate for subsequent re-precipitation as crystalline calcium carbonate.- DETAILED DESCRIPTION - A new process for obtaining calcium carbonate coated fibers in which the fibers are contacted with CO2 generators and a composition containing Ca++ ions which reacts with CO2 to form a fine precipitate of CaCO3 in situ on the fiber. It comprises: - (1) a stage of production of a primary composition containing Ca(HCO3)2 - (2) a stage of production of a secondary composition containing Ca(OH)2; - (3) a mixing stage of the compositions and the fibers to be treated to form a CaCO3 precipitate.- INDEPENDENT CLAIMS are also included for the new paper product obtained</p> |
申请公布号 |
FR2775197(B1) |
申请公布日期 |
2001.08.03 |
申请号 |
FR19980002096 |
申请日期 |
1998.02.20 |
申请人 |
L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE |
发明人 |
RICHARD CHRISTIAN |
分类号 |
C01F11/18;D21C5/02;D21C9/00;D21H17/67;D21H17/70;(IPC1-7):B01D11/02 |
主分类号 |
C01F11/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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