• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Chromium values may be recovered from the chromium bearing ores or sources by subjecting the chromium bearing source to a roast in the presence of sulfuric acid and an oxidant which contains manganese compounds at temperatures ranging from about 200 DEG to about 500 DEG C. followed by leaching, separation and solvent or ion exchange extraction whereby chromium is selectively extracted and recovered.
    公开号:SU793409A3
    申请号:SU772453397
    申请日:1977-02-18
    公开日:1980-12-30
    发明作者:Кларк Стаутер Джон；Тае-Сунг Юм Ричард
    申请人:Юоп, Инк (Фирма)；
    IPC主号:
    专利说明:

    This invention relates to a process for extracting chromium from ores,
    Methods are known for extracting chromium from ores, consisting in the intersection of chromite with sodium carbonate, followed by leaching, acidification, crystallization of sodium bichromate and reduction to metallic chromium 1
    The prototype of the invention is a method for extracting chromium by decomposing the ore with sulfuric acid by heating and leaching with water to transfer the chromium to solution 2.
    The disadvantage of this method is the insufficient efficiency of the process, the low extraction of chromium.
    The aim of the invention is to increase the efficiency of the process and the possibility of simultaneous extraction of manganese.
    This goal is achieved by the fact that the decomposition is carried out with the introduction of manganese raw materials containing manganese dioxide at a temperature of 200-500 ° C and maintaining the ratio of chromite ore to manganese raw material and sulfuric acid from 1: 1: 1 to 1: 2: 10, and the solution after leaching is treated with an organic solvent or ion exchange resin for the extracted chromium, and manganese is extracted from the aqueous phase; and also the fact that 5 amines are used as an organic solvent, and an exchanger resin is used as an ion exchange resin.
    The essence of the method is illustrated by the following examples,
    Example. South chromite ore containing 10.4% chromium and 8% iron, together with 10 g of marine nodules containing 4.1% iron, 1.2% nickel, 0.9% meth, 0.2% cobalt, 23.2% manganese (17.9% manganese as manganese dioxide) and 2.32% water were ground to 15 but 65 mesh and combined. Thereafter, 30 cm of sulfuric acid (concentrated) is added and the mixture is heated at about 400 ° C for 10 μm. Then the mixture is cooled to BOS and above 20 lacquered with 250 g of water with stirring for 3 hours and at a temperature of 60 ° C. The solution is then filtered and 8 g of a mixture of chromite ore and marine nodules are added to oxidize the remaining three-halo
    chromium ions. The resulting mixture is placed in a separatory funnel and 250 cm of opraiffl4ecKoro containing 5% by volume of ticaryl tertiary amine solution, 5% by volume of tributyl phosphate (which is added as a demulsifier) and 90% by volume of kerosene are added. The mixture is stirred for 1 min and section 1 ") t. The aqueous phase is separated from the organic, containing extracted chromium ions, and the organic phase is then washed with water to remove trapped manganese and iron. The aqueous phase is further separated from the organic layer and then the last 939394
    250 cm W / s of ammonium hydroxide is dissolved. The analysis determined
    that B-extraction extracted 93,17s of chromium from the ore contained in the ore.
    EXAMPLE 2: An illustration of the need for the presence of a manganese-containing dino junction in which the manganese is in the +4 valence state and is present in a weight ratio of from about 1: 1 to 1: 2 to the weight of the chromite ore. A mixture of chromite ore and marine nodules was processed as in Example 1. The results of these experiments are listed in the table.
    权利要求:
    Claims (3)
    [1]
    Claim
    1. A method for extracting chromium from chromite ore, including decomposition of the ore with sulfuric acid when heated and leaching with water with the transfer of chromium into a solution different in heme, which, in order to increase the efficiency of the process and the possibility of simultaneous extraction of manganese, decomposes. The burning is carried out with the introduction of manganese raw materials containing manganese dioxide at a temperature of 200-500 ° C and maintaining the ratio of chromite ore to manganese raw materials and sulfuric acid from 1: 1: 1 to 1:
    [2]
    2:10, and the solution after leaching is treated with an organic solvent or ion exchange resin to extract chromium, and manganese is extracted from the aqueous phase.
    45 2. The method according to π. 1, characterized in that amines are used as an organic solvent.
    [3]
    3 '. Pop Method 1, characterized in that anion exchange resin is used as the ion exchange resin 50 .
    类似技术:
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    同族专利:
    公开号 | 公开日
    PH15813A|1983-03-25|
    AU506814B2|1980-01-24|
    NO146957C|1983-01-05|
    FR2341657A1|1977-09-16|
    BR7700964A|1977-11-01|
    AU2241777A|1978-08-24|
    NO146957B|1982-09-27|
    US4029734A|1977-06-14|
    AR212194A1|1978-05-31|
    NO770542L|1977-08-22|
    ZA77525B|1977-12-28|
    JPS52113313A|1977-09-22|
    CA1094813A|1981-02-03|
    FR2341657B1|1979-09-07|
    JPS5531090B2|1980-08-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1279110A|1918-02-02|1918-09-17|Haslup & Peacock Inc|Process of producing manganese sulfate.|
    US2176774A|1929-04-29|1939-10-17|Gen Manganese Corp|Process of extracting manganese from ore|
    US2601306A|1948-02-24|1952-06-24|Rex R Lloyd|Method for dissolution of chromium from chromite ores|
    GB798326A|1955-01-24|1958-07-16|Jeanie Faulds Burstall|Improvements in or relating to the recovery of anions|
    US3085875A|1960-01-04|1963-04-16|Howe Sound Co|Treatment of manganese ores|
    US3082080A|1960-05-02|1963-03-19|Freeport Sulphur Co|Leaching of chromium, nickel, cobalt and manganese from ores|
    US3106451A|1960-11-01|1963-10-08|United Internat Res Inc|Method of producing manganese sulfate|
    US3244513A|1962-07-25|1966-04-05|Sherritt Gordon Mines Ltd|Process for the treatment of lateritic ores to obtain cobalt and nickel values|
    DE2150785C2|1971-10-12|1973-07-12|Preussag Ag|Process for the extraction of a manganese oxide concentrate, metallic copper, nickel and cobalt from manganese ores|US4144145A|1976-04-15|1979-03-13|Solex Research Corporation|Process for recovery of reusable chromic acid from the waste chromic acid solution containing impurities|
    US4230677A|1978-11-30|1980-10-28|Union Carbide Corporation|Recovery of Cr2 O3 from a chromium bearing solution|
    US4207295A|1979-02-13|1980-06-10|Union Carbide Corporation|Processing of chromium ore|
    FR2502136B1|1981-03-18|1985-07-26|Krebs Cie Sa|PROCESS AND SOLVENT FOR EXTRACTING CHROMATES PRESENT IN AN AQUEOUS SOLUTION|
    JPS60152895U|1984-03-21|1985-10-11|
    JPH022158Y2|1984-03-21|1990-01-18|
    US4956154A|1988-03-09|1990-09-11|Unc Reclamation|Selective removal of chromium, nickel, cobalt, copper and lead cations from aqueous effluent solutions|
    WO2010126593A1|2009-04-30|2010-11-04|World Resources Company|Process for recovering metals and metal compounds from mined ore and other metal-bearing raw source materials|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/659,390|US4029734A|1976-02-19|1976-02-19|Recovery of chromium values|
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