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51 条记录 (耗时 0.026 秒)

    Neutral hydrocarboxycarbonyl thionocarbamate sulfide collectors
    12.
    发明授权
    Neutral hydrocarboxycarbonyl thionocarbamate sulfide collectors 失效

    公开(公告)号：US4584097A

    公开(公告)日：1986-04-22

    申请号：US641657

    申请日：1984-08-17

    申请人： Yun-Lung Fu ,  Samuel S. Wang

    发明人： Yun-Lung Fu ,  Samuel S. Wang

    IPC分类号： B03D1/001 ,  B03D1/012 ,  B03D1/02

    CPC分类号： B03D1/012 ,  B03D2201/02 ,  B03D2203/02

    摘要： New and improved collector compositions for use in froth flotation processes for the beneficiation of mineral values from base metal sulfide ores are disclosed. The collector compositions comprise at least one hydrocarboxycarbonyl thionocarbamate compound selected from compounds of the formula: ##STR1## wherein R.sup.1 and R.sup.2 are each, independently, selected from saturated and unsaturated hydrocarbyl radicals, alkyl polyether radicals and aromatic radicals, or such radicals optionally substituted by polar groups selected from halogen, nitrile and nitro groups. The use of the hydrocarboxycarbonyl thionocarbamate collectors provides excellent metallurgical recoveries of sulfide mineral values in froth flotation processes conducted over a broad range of pH conditions including acid, neutral and mildly alkaline pH.

    Novel process of alkoxy and aryloxy isothiocyanate preparation
    17.
    发明授权
    Novel process of alkoxy and aryloxy isothiocyanate preparation 失效
    烷氧基和芳氧基异硫氰酸酯制备的新工艺

    公开(公告)号：US4778921A

    公开(公告)日：1988-10-18

    申请号：US821302

    申请日：1986-01-22

    申请人： Morris E. Lewellyn ,  Samuel S. Wang ,  Peter J. Strydom

    发明人： Morris E. Lewellyn ,  Samuel S. Wang ,  Peter J. Strydom

    IPC分类号： C07C331/32 ,  C07C125/04 ,  C07C125/06

    CPC分类号： C07C331/32

    摘要： Alkoxy and aryloxy isothiocyanates are produced by the reaction of a haloformate and an alkali or alkaline earth metal thiocyanate in the presence of water and a catalyst comprising a six membered mononuclear or ten membered fused polynuclear aromatic, heterocyclic compound having 1 or 2 nitrogen atoms as the only hetero atoms in the ring.

    摘要翻译： 烷氧基和芳氧基异硫氰酸酯通过卤代甲酸酯和碱金属或碱土金属硫氰酸盐在水和催化剂的存在下反应来制备，所述催化剂包含具有1或2个氮原子的六元单核或十元稠合多核芳族杂环化合物作为 环中只有杂原子。

    Froth flotation process
    18.
    发明授权
    Froth flotation process 失效
    泡沫浮选工艺

    公开(公告)号：US4532031A

    公开(公告)日：1985-07-30

    申请号：US487363

    申请日：1983-04-21

    申请人： Samuel S. Wang ,  Michael J. Scanlon

    发明人： Samuel S. Wang ,  Michael J. Scanlon

    IPC分类号： B03D1/01 ,  B03D1/012 ,  B03D1/14

    CPC分类号： B03D1/01 ,  B03D1/012 ,  B03D2201/04 ,  B03D2203/02

    摘要： A process for the recovery of mineral values by froth flotation in an aqueous medium employing a novel frother. Frothers prepared by Michael addition between alpha, beta-unsaturated ethylenic compounds and either alcohols, amines or mercaptans or by the condensation of HCN, aldehydes/ketones with either alcohols, amines or mercaptans have been found to be effective in the froth flotation system and capable of reducing the required collector consumption.

    摘要翻译： 在采用新型起泡剂的水性介质中通过泡沫浮选回收矿物值的方法。 已经发现通过在α，β-不饱和烯烃化合物与醇，胺或硫醇之间的迈克尔加成制备的或通过HCN，醛/酮与醇，胺或硫醇的缩合制备的发泡剂在泡沫浮选体系中是有效的，并且具有 减少所需的收集器消耗。

    Addition agent composition
    19.
    发明授权
    Addition agent composition 失效
    添加剂组成

    公开(公告)号：US4360615A

    公开(公告)日：1982-11-23

    申请号：US241908

    申请日：1981-03-09

    申请人： Samuel S. Wang ,  Morris E. Lewellyn

    发明人： Samuel S. Wang ,  Morris E. Lewellyn

    IPC分类号： C08L93/00 ,  C09F1/04 ,  C08L95/00 ,  C21C7/04 ,  C22B9/00

    CPC分类号： C09F1/04 ,  C08L93/00

    摘要： Modified tall oil pitch is blended with a metallurgical addition agent and briquetted, extruded, molded, pelletized, or tabletized into a unitary composition. The tall oil pitch is modified chemically to increase the molecular weight and improve the binding properties.

    摘要翻译： 将改性的妥尔油沥青与冶金添加剂混合并压块，挤出，模塑，造粒或成片成一体成分。 妥尔油沥青经化学改性以提高分子量并提高粘合性能。