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    • 3. 发明授权
    • Ore flotation process and use of mixed hydrocarbyl dithiophosphoric
acids and salts thereof
    • 矿石浮选方法和混合烃基二硫代磷酸及其盐的用途
    • US4879022A
    • 1989-11-07
    • US300694
    • 1989-01-19
    • Alan C. ClarkEdward P. RichardsDouglas R. Shaw
    • Alan C. ClarkEdward P. RichardsDouglas R. Shaw
    • B03D1/014B03D1/02B03D1/06
    • B03D1/06B03D1/014B03D1/02B03D1/012B03D2201/02B03D2203/02
    • The present invention relates to an improved process for beneficiating an ore containing sulfide materials with selective rejection of pyrite, pyrrhotite and other metals and gangue. In particular, the process is useful for beneficiating ores and recovering copper from said ores. In one embodiment the process comprises the steps of(A) grinding the ore to an appropriate size range;(B) preparing a slurry comprising(B-1) said ground ore;(B-2) at least one collector which is a water-dispersible or soluble dihydrocarbyldithiodiphosphoric acid or salt having the formula ##STR1## wherein R.sup.1 and R.sup.2 are different hydrocarbyl groups containing up to about 12 carbon atoms, n is an integer equal to the valence of X and X.sup.n+ is a dissociating cation; and(B-3) water;(C) conditioning the slurry with SO.sub.2 under aeration at a pH of about 5.5 to about 7.5;(D) subjecting the conditioned slurry to froth flotation to produce a froth containing a metal rougher concentrate;(E) collecting said froth; and p0 (F) recovering the metal rougher concentrate containing the desired metal values.
    • 本发明涉及一种用于选择性排除黄铁矿,磁黄铁矿和其他金属和脉石的含硫化物材料的改良方法。 特别地,该方法对于选矿和从所述矿石中回收铜是有用的。 在一个实施方案中,该方法包括以下步骤:(A)将矿石研磨至适当的尺寸范围; (B)制备包含(B-1)所述研磨矿石的浆料; (B-2)至少一种作为水分散性或可溶性二烃基二硫代磷酸或具有式(I)的盐的收集剂,其中R 1和R 2是含有至多约12个碳原子的不同烃基,n是整数 等于X的化合价,Xn +是离解的阳离子; 和(B-3)水; (C)在pH 5.5至约7.5的通气条件下用SO 2调节浆料; (D)对经调节的浆料进行泡沫浮选以产生含有金属粗粒料的泡沫; (E)收集所述泡沫; 和p0(F)回收含有所需金属值的金属粗糙浓缩物。
    • 4. 发明授权
    • Process for recovering and purifying unreacted acrylonitrile from the
waste stream in the manufacture of 2-acrylamido-2-methyl propane
sulfonic acid
    • 在制备2-丙烯酰氨基-2-甲基丙磺酸时从废物流中回收和纯化未反应的丙烯腈的方法
    • US4808344A
    • 1989-02-28
    • US154666
    • 1988-02-10
    • Douglas J. HallenburgAlan C. ClarkJames L. Hambrick
    • Douglas J. HallenburgAlan C. ClarkJames L. Hambrick
    • B01D3/10C07C253/34C07C255/08C07C309/15C07C121/32C07C143/02
    • C07C253/34Y10S203/03
    • Excess amounts of a pure form of acrylonitrile are reacted with other reactants in the production of various compounds such as 2-acrylamido-2-methyl propane sulfonic acid. Accordingly, large amounts of acrylonitrile remain unreacted and present with other contaminants. The present invention is directed toward the purification of such unreacted acrylonitrile and the purified acrylonitrile obtained from such a purification process. The purification is carried out by treating the unreacted acrylonitrile with a base and removing salts formed. The treated material is fed to a heat exchanger which heats the material preferably under vacuum to about 120.degree. F. and provides a heated fluid material. This heated fluid material is pumped to a lower area of a distillation tower which is maintained under vacuum and includes a plurality of distillation trays. Purified acrylonitrile has a lower boiling point and is drawn toward the top of the tower by vacuum and removed whereas the remainder of the material which includes contaminants has a higher boiling point and falls to the bottom of the tower. This bottom portion is removed and recycled to the heat exchanger. The purified acrylonitrile removed from the top of the tower by vacuum is capable of, and sufficiently pure for, reuse in the formation of other compounds such as 2-acrylamido-2-methyl propane sulfonic acid. The process provides purified acrylonitrile while avoiding undesirable polymerization. The purified acrylonitrile obtained from the proces and 2-acrylamido-2-methyl propane sulfonic acid produced with the purified acrylonitrile lack undesirable water insoluble polymers and copolymers and have improved and unexpectedly superior storage stability.
    • 在制备各种化合物如2-丙烯酰胺基-2-甲基丙磺酸时,过量的纯丙烯腈与其它反应物反应。 因此,大量的丙烯腈保持未反应并与其它污染物一起存在。 本发明涉及纯化这种未反应的丙烯腈和由这种纯化方法得到的纯化丙烯腈。 通过用碱处理未反应的丙烯腈并除去形成的盐来进行纯化。 经处理的材料被送入热交换器,该热交换器优选在真空下将材料加热至约120°F,并提供加热的流体材料。 该加热的流体材料被泵送到蒸馏塔的下部区域,蒸馏塔保持在真空下并且包括多个蒸馏塔板。 纯化的丙烯腈具有较低的沸点并且通过真空被吸引到塔的顶部并除去,而包含污染物的其余材料具有较高的沸点并且落到塔的底部。 该底部被去除并再循环到热交换器。 通过真空从塔的顶部除去的纯化的丙烯腈能够且足够纯,用于形成其它化合物如2-丙烯酰胺基-2-甲基丙磺酸。 该方法提供纯化的丙烯腈,同时避免不期望的聚合。 由纯化丙烯腈生产的丙烯腈和2-丙烯酰氨基-2-甲基丙磺酸得到的纯化丙烯腈缺乏不合需要的水不溶性聚合物和共聚物,并且具有改进和出人意料的优异的储存稳定性。
    • 6. 发明授权
    • Flotation process using metal salts of phosphorus acids
    • 使用磷酸盐金属盐的浮选过程
    • US5082554A
    • 1992-01-21
    • US538959
    • 1990-06-15
    • James H. BushAlan C. Clark
    • James H. BushAlan C. Clark
    • B03D1/014
    • B03D1/014B03D2201/02B03D2203/02
    • The present invention relates to improved process for beneficiating an ore-containing sulfide material. In particular, the process is useful for beneficiating ores and recovering metals such as gold, copper, lead, molybedenum, zinc, etc., from the ores. In one embodiment, the process comprises the steps of:(1) forming a slurry comprising at least one crushed mineral-containing ore, water and a collector which is at least one metal salt of a phosphorus acid represented by the Formula: ##STR1## wherein each R.sub.1 is independently a hydrocarbyl, hydrocarbyloxy or hydrocarbylthio group having from 1 to about 18 carbon atoms, each X is independently oxygen or sulfur, and wherein the metal is i) at least one single metal having a lowest oxidation state of plus two or ii) at least one mixture of metals wherein at least one of the metals has a lowest oxidation state of plus two, provided that when the primary mineral is copper, zinc or silver, the metal (i) is other than zinc.(2) subjecting the slurry from step (1) to froth flotation to produce a froth; and(3) recovering a mineral from the froth.
    • 本发明涉及用于选矿含硫硫化物材料的改进方法。 特别地,该方法可用于从矿石中选矿和回收金属如金,铜,铅,钼,锌等。 在一个实施方案中,该方法包括以下步骤:(1)形成包含至少一种破碎的含矿物矿石,水和收集器的浆料,该矿物质是至少一种由下式表示的磷酸的金属盐: (I)其中每个R 1独立地为具有1至约18个碳原子的烃基,烃氧基或烃硫基,每个X独立地为氧或硫,并且其中金属为i)至少一种具有最低氧化态的单一金属 加上两个或ii)金属的至少一种混合物,其中至少一种金属具有最低的氧化态加二,只要当初级矿物是铜,锌或银时,金属(i)不是锌。 (2)对来自步骤(1)的浆料进行泡沫浮选以产生泡沫; 和(3)从泡沫中回收矿物质。