专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4064217A Process for recovering aluminum from alunite ore 失效
标题翻译：从褐铁矿中回收铝的工艺
公开(公告)号：US4064217A
公开(公告)日：1977-12-20
申请号：US728215
申请日：1976-09-30
申请人： George J. Hartman , Michael G. Darland
发明人： George J. Hartman , Michael G. Darland
IPC分类号： C01D5/00 , C01F7/06
CPC分类号： C01F7/0686 , C01D5/008
摘要： An improvement in the process for recovering aluminum from alunite ore disclosed in U.S. Pat. Nos. 3,890,425 and 3,890,426, the improvement being in the recovery of potassium sulfate by crystallization from the leaching solution resulting from potassium hydroxide leaching of the roasted ore, the improvement consisting of adding potassium hydroxide to the concentrated leach liquor prior to crystallization to increase the concentration of the potassium ion so that increased recoveries of potassium sulfate are obtained at a given temperature over those obtained when this procedure is not used. By this procedure a yield is obtained at a temperature below that which is required to obtain the same yield when potassium hydroxide is not used so that the high temperatures formerly necessary to hold enough potassium sulfate in solution for an economic crystallization are avoided. The improvement is particularly adapted to the process of the patents using potassium hydroxide as the leaching agent and in which the mother liquor is recycled to the leach as potassium hydroxide in an amount up to that required for the leaching step can be added in the crystallization step so that the potassium hydroxide serves both as a crystallization aid and as a leachant.
摘要翻译：美国专利中公开的从铝酸钙矿中回收铝的方法的改进。编号3,890,425和3,890,426，其改进在于通过从焙烧矿石的氢氧化钾浸出得到的浸出溶液中结晶回收硫酸钾，其改进包括在结晶之前向浓缩浸出液中加入氢氧化钾以提高浓度的钾离子，使得在给定温度下获得的硫酸钾的回收率提高超过不使用该方法时获得的那些。通过该方法，在低于当不使用氢氧化钾时获得相同产率所需的温度下获得的产率是可以获得的，因此避免了先前在用于经济结晶的溶液中保持足够的硫酸钾所需的高温。该改进特别适用于使用氢氧化钾作为浸出剂的专利的方法，并且其中母液再循环至浸出液中，其中氢氧化钾的量可以达到浸出步骤所需的量，可以在结晶步骤中加入使得氢氧化钾既用作结晶助剂又用作浸出剂。

2. 发明授权

US3996334A Process for recovering aluminum from alunite 失效
标题翻译：从铝酸钠中回收铝的工艺
公开(公告)号：US3996334A
公开(公告)日：1976-12-07
申请号：US582806
申请日：1975-06-02
申请人： George J. Hartman , Vernon R. Ewing
发明人： George J. Hartman , Vernon R. Ewing
IPC分类号： C01F7/02 , B01J39/02 , B01J39/04 , B01J41/04 , C01D5/00 , C01F7/06
CPC分类号： B01J41/043 , B01J39/02 , B01J39/043 , C01D5/008 , C01F7/0686
摘要： An improvement in processes for recovering aluminum from alunite ore which processes include roasting the ore to remove water of hydration, removing sulfur and potassium compounds from the roasted ore by a procedure including a final leaching step resulting in a residue and a solution containing potassium sulfate, effecting partial recovery of potassium sulfate from the solution by crystallization with some potassium sulfate being bled off from the mother liquor, converting aluminum values in the residue to alkali metal aluminates by digesting the residue with alkali metal hydroxide including a substantial amount of sodium hydroxide, removing silicon from the alkali metal aluminates leaving a waste desilication product, recovering aluminum values from the desilicated aluminates by precipitation, circulating the mother liquor from the precipitation step to digestion as contaminated sodium hydroxide is bled off, the improvement which comprises enhancing the economics of the overall process by introducing therein an ion exchange procedure in which potassium hydroxide for the first leaching step is produced through ion exchange by use of potassium sulfate and sodium hydroxide, a further improvement being the use of the desilication product as the ion exchange agent.
摘要翻译：从铝酸钙矿石中回收铝的方法的改进包括焙烧矿石以除去水合水，通过包括残留物的最终浸出步骤和含有硫酸钾的溶液的方法从焙烧的矿石中除去硫和钾化合物，通过用母液中的一些硫酸钾结晶从溶液中部分地回收硫酸钾，通过用包括大量氢氧化钠的碱金属氢氧化物将残留物消化，将残余物中的铝转化成碱金属铝酸盐，除去来自碱金属铝酸盐的硅离开废弃的脱硅产物，通过沉淀从脱铝的铝酸盐中回收铝的值，将母液从沉淀步骤循环到被污染的氢氧化钠的消解中，其改进包括提高整体的经济性过程通过在其中引入离子交换方法，其中通过使用硫酸钾和氢氧化钠通过离子交换产生用于第一浸出步骤的氢氧化钾，进一步改进的是使用脱硅产物作为离子交换剂。

3. 发明授权

US4427235A Method of solution mining subsurface orebodies to reduce restoration activities 失效
标题翻译：解决矿山开采地下矿体的方法，减少修复活动
公开(公告)号：US4427235A
公开(公告)日：1984-01-24
申请号：US226122
申请日：1981-01-19
申请人： George J. Hartman
发明人： George J. Hartman
IPC分类号： E21B43/28
CPC分类号： E21B43/28
摘要： A method of solution mining wherein a lixiviant containing both leaching and oxidizing agents is injected into the subsurface orebody. The composition of the lixiviant is changed by reducing the level of oxidizing agent to zero so that soluble species continue to be removed from the subsurface environment. This reduces the uranium level of the ground water acquifier after termination of the lixiviant injection.
摘要翻译：一种溶液开采方法，其中将含有浸出和氧化剂的浸滤剂注入地下矿体。通过将氧化剂的水平降低至0来改变浸出物的组成，使得可溶性物质继续从地下环境中除去。这样可以降低浸出液终止后的地下水铀浓度。

4. 发明授权

US4230678A Process for recovering aluminum from alunite 失效
标题翻译：从铝酸钠中回收铝的工艺
公开(公告)号：US4230678A
公开(公告)日：1980-10-28
申请号：US12181
申请日：1979-02-14
申请人： George J. Hartman , Vernon R. Ewing
发明人： George J. Hartman , Vernon R. Ewing
IPC分类号： C01F7/06 , C01F7/47 , C01F7/14
CPC分类号： C01F7/47 , C01F7/0686
摘要： An improvement in processes for recovering aluminum from alunite ore which processes include roasting the ore to remove water of hydration, removing sulfur and potassium compounds from the roasted ore by a procedure including a first leaching step resulting in a residue and a solution containing potassium sulfate, effecting partial recovery of potassium sulfate from the solution by crystallization with some potassium sulfate being bled off from the mother liquor, converting aluminum values in the residue to alkali metal aluminates by digesting the residue with alkali metal hydroxide including a substantial amount of sodium hydroxide, removing silicon from the alkali metal aluminates leaving a waste desilication product, recovering aluminum values from the desilicated aluminates by precipitation, circulating the mother liquor from the precipitation step to digestion as contaminated sodium hydroxide is bled off, the improvement which comprises enhancing the economics of the overall process by introducing therein an ion exchange procedure in which potassium hydroxide for the first leaching step is produced through ion exchange by use of potassium sulfate and sodium hydroxide, a further improvement being the use of the desilication product as the ion exchange agent.
摘要翻译：从铝酸钙矿石中回收铝的方法的改进包括焙烧矿石以除去水合水，通过包括残留物的第一浸出步骤和含有硫酸钾的溶液的方法从焙烧的矿石中除去硫和钾化合物，通过用母液中的一些硫酸钾结晶从溶液中部分地回收硫酸钾，通过用包括大量氢氧化钠的碱金属氢氧化物将残留物消化，将残余物中的铝转化成碱金属铝酸盐，除去来自碱金属铝酸盐的硅离开废弃的脱硅产物，通过沉淀从脱铝的铝酸盐中回收铝的值，将母液从沉淀步骤循环到被污染的氢氧化钠的消解，其改进包括提高整体的经济性过程通过在其中引入离子交换方法，其中通过使用硫酸钾和氢氧化钠通过离子交换产生用于第一浸出步骤的氢氧化钾，进一步改进的是使用脱硅产物作为离子交换剂。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式