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1. 发明申请

WO1981000400A1 ALUMINA PRODUCTION BY NITRIC ACID EXTRACTION OF CLAY 审中-公开
标题翻译：氧化铝生产硝酸提取粘土
公开(公告)号：WO1981000400A1
公开(公告)日：1981-02-19
申请号：PCT/US1980000555
申请日：1980-05-09
申请人： REYNOLDS METALS CO
发明人： REYNOLDS METALS CO , SCOTT C , SPOONTS R , DEWEY J , STRATTON C , KANE J , RUSHING J
IPC分类号： C01F07/24
CPC分类号： C01F7/24 , F02B2075/027 , Y10S423/16
摘要： A process for the extraction of aluminum values from clay using nitric acid comprising the steps of pelletizing the clay, calcining the pellets at 1100-1550`F in a fluidized bed reactor, extracting the pellets in about 30-40% nitric acid to produce a basic aluminum nitrate solution, purifying said solution by precipitation of iron oxide, filtering the liquor in the presence of a flocculant to remove silicons impurities, crystalizing aluminum nitrate nonahydrate, decomposing the nonahydrate in at least three steps, calcining the residual metallurgical grade alumina and reconstituting to nitric acid the NO u gases produced.
摘要翻译：一种使用硝酸从粘土中提取铝值的方法，包括以下步骤：在1100-1550°F的流化床反应器中煅烧颗粒，在约30-40％的硝酸中提取沉淀物以产生碱式硝酸铝溶液，通过沉淀氧化铁净化所述溶液，在絮凝剂存在下过滤液体以除去硅杂质，结晶化的硝酸铝九水合物，至少三步分解九水合物，煅烧残余冶金级氧化铝并重构对硝酸产生的NO x产生。

2. 发明申请

WO1981000401A1 DECOMPOSITION OF ALUMINUM NITRATE 审中-公开
标题翻译：硝酸铝的分解
公开(公告)号：WO1981000401A1
公开(公告)日：1981-02-19
申请号：PCT/US1980000552
申请日：1980-05-09
申请人： REYNOLDS METALS CO
发明人： REYNOLDS METALS CO , DEWEY J , RUSHING J , SCOTT C
IPC分类号： C01F07/30
CPC分类号： C01F7/308 , C01P2004/51 , Y10S423/16
摘要： Method for the decomposition of aluminum nitrate crystals to alumina comprising the steps of: (a) melting the aluminum nitrate crystals; (b) evaporating from the melted crystals in a once through evaporator at the boiling temperature of the mixture and for a time sufficient to remove water and associated nitric acid and to provide a fluid having an alumina concentration of at least about 18% by weight; (c) decomposing the product of step (b) at a temperature of between about 150 and about 200`C and recovering the heat of condensation of the resultant vapors; (d) further decomposing the product of step (c) in a fluidized bed decomposer at a temperature of between about 300 and about 400`C to reduce the residual nitrate concentration in the product to between about5 and about 10 weight percent; (e) decomposing the product of step (d) in a fluidized bed decomposer at a temperature of between about 500 and about 800`C to reduce the residual nitrate concentration in the product to below about 3 percent by weight; and (f) calcining the product of step (e) at a temperature of at least about 1000`C.
摘要翻译：将硝酸铝晶体分解成氧化铝的方法包括以下步骤：（a）熔融硝酸铝晶体; （b）在混合物的沸腾温度下在一次性蒸发器中从熔融的晶体中蒸发出足够的时间以除去水和相关的硝酸，并提供氧化铝浓度至少为约18重量％的流体; （c）在约150至约200℃的温度下分解步骤（b）的产物并回收所得蒸气的冷凝热; （d）在流化床分解器中在约300至约400℃的温度下进一步分解步骤（c）的产物以将产物中的残留硝酸盐浓度降低至约5至约10重量％; （e）在流化床分解器中在约500至约800℃的温度下分解步骤（d）的产物以将产物中的残留硝酸盐浓度降低至低于约3重量％; 和（f）在至少约1000℃的温度下煅烧步骤（e）的产物。

3. 发明专利

ZA804108B ALUMINA PRODUCTION BY NITRIC ACID EXTRACTION OF CLAY 未知
公开(公告)号：ZA804108B
公开(公告)日：1981-09-30
申请号：ZA804108
申请日：1980-07-08
申请人： REYNOLDS METALS CO
发明人： DEWEY J , RUSHING J , KANE J , SCOTT C , STRATTON C , SPOONTS R
IPC分类号： C01F7/24 , F02B75/02 , C22B
摘要： Alumina values are extracted from clay by the steps of pelletizing into spherical particles, calcining the pellets in a fluidized bed reactor, extracting the clay in about 30-40% nitric acid, purifying the basic aluminum nitrate produced, crystallizing aluminum nitrate nonahydrate, decomposing the nonahydrate in at least three steps, calcining the produced alumina and reconstituting the NOx gases to nitric acid.

4. 发明专利

ZA8004108B ALUMINA PRODUCTION BY NITRIC ACID EXTRACTION OF CLAY 未知
公开(公告)号：ZA8004108B
公开(公告)日：1981-09-30
申请号：ZA8004108
申请日：1980-07-08
申请人： REYNOLDS METALS CO
发明人： DEWEY J , RUSHING J , KANE J , SCOTT C , STRATTON C , SPOONTS R
IPC分类号： C01F7/24 , F02B75/02 , C22B
CPC分类号： C01F7/24 , F02B2075/027 , Y10S423/16

5. 发明专利

ZA804110B DECOMPOSITION OF ALUMINUM NITRATE 未知
公开(公告)号：ZA804110B
公开(公告)日：1981-09-30
申请号：ZA804110
申请日：1980-07-08
申请人： REYNOLDS METALS CO
发明人： SCOTT C , RUSHING J , DEWEY J
IPC分类号： C01F7/30 , C01F

6. 发明专利

ZA8004110B DECOMPOSITION OF ALUMINUM NITRATE 未知
公开(公告)号：ZA8004110B
公开(公告)日：1981-09-30
申请号：ZA8004110
申请日：1980-07-08
申请人： REYNOLDS METALS CO
发明人： SCOTT C , RUSHING J , DEWEY J
IPC分类号： C01F7/30 , C01F
CPC分类号： C01F7/308 , C01P2004/51 , Y10S423/16

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