公开(公告)号：US4394357A

公开(公告)日：1983-07-19

申请号：US321575

申请日：1981-11-16

申请人： Diana M. Mounsey ,  David B. Mobbs

发明人： Diana M. Mounsey ,  David B. Mobbs

IPC分类号： B01D20060101 ,  C01G20060101 ,  C01G51/00 ,  C01G51/04 ,  C01G53/00 ,  C01G53/10 ,  C07F15/04 ,  C22B20060101 ,  C22C19/00 ,  C25C1/20

CPC分类号： C22B23/0484

摘要： The invention relates to the preferential precipitation of cobalt from aqueous acidic sulphate solutions of nickel and cobalt.The separation is carried out by introducing at least a stoichiometric amount of Caro's Acid containing no more than a small amount of hydrogen peroxide into the nickel/cobalt solution progressively over a period of at least an hour, while maintaining the solution of a pH from 3.1 or 3.5 up to 4.7 by addition of an alkali metal hydroxide carbonate or bicarbonate, or at 4.3 to 4.7 with the corresponding ammonium compound, and, thereafter separating the precipitate from the aqueous cobalt depleted solution.In preferred features, the Caro's Acid solution used contains hydrogen peroxide in a mole ratio to peroxomonosulphuric acid of not more than 1:10; the Caro's Acid solution is introduced continuously or in increments of less than 1% of the total over a period of at least an hour; the Caro's Acid is produced by reaction between 93-98% sulphuric acid and 65-72% aqueous hydrogen peroxide in a mole ratio of 2.7:1 to 3.5:1; the Caro's Acid solution is diluted before use; and particular amounts of Caro's Acid are used depending upon the nature of the nickel/cobalt solution, the mode of treatment, and the nature of the neutralizing agent. Further separation can be effected by subsequent water and particularly not acid washing of the precipitate.

摘要翻译： 本发明涉及钴从镍和钴的酸性硫酸盐水溶液中优先沉淀。 通过在至少1小时的时间内将至少含有不超过少量过氧化氢的化学计量量的Caro酸向镍/钴溶液中逐渐引入，同时保持pH为3.1的溶液来进行分离 或通过加入碱金属氢氧化物碳酸盐或碳酸氢盐，或在4.3至4.7℃下加入相应的铵化合物，然后从含钴贫化溶液中分离出沉淀物，3.5至4.7。 在优选的特征中，所用Caro's酸溶液含有与过氧二硫酸的摩尔比不大于1:10的过氧化氢; Caro酸溶液在至少一小时内持续或以小于总量的1％的增量引入; 卡罗酸是通过93-98％硫酸和65-72％过氧化氢水溶液之间的摩尔比为2.7:1至3.5:1的反应产生的; 使用前将Caro's Acid溶液稀释; 并且根据镍/钴溶液的性质，处理方式和中和剂的性质，使用特定量的Caro酸。 进一步的分离可以通过随后的水进行，特别是不是酸洗该沉淀物。

公开(公告)号：US5218132A

公开(公告)日：1993-06-08

申请号：US738667

申请日：1991-07-31

申请人： David B. Mobbs ,  David Shaw ,  Simon Pollard

发明人： David B. Mobbs ,  David Shaw ,  Simon Pollard

IPC分类号： B01J20/20 ,  B01J20/30

CPC分类号： B01J20/20

摘要： Adsorbents suitable for use to remove aromatic or polyaromatic hydrocarbons from liquids such as oils may be produced from an acid-activated siliceous clay containing adsorbed oil by treating to carbonize the oil and to activate the carbon so produced on the surface of the clay. The carbonization and activation steps may be conducted by heating in the presence of an activating agent which may be zinc chloride. Preferably zinc chloride activated material is subsequently steam-treated.The invention is particularly useful to reduce the content of hazardous polyaromatic hydrocarbons, such as benzo(a)pyrene, from edible oils.

公开(公告)号：US4770808A

公开(公告)日：1988-09-13

申请号：US899895

申请日：1986-08-25

申请人： Colin F. McDonogh ,  David B. Mobbs

发明人： Colin F. McDonogh ,  David B. Mobbs

IPC分类号： C01B15/037 ,  C23C22/06 ,  C23C22/77 ,  C23F3/06 ,  C23G1/00 ,  C23G1/02

CPC分类号： C23F3/06 ,  C01B15/037 ,  C23G1/02

摘要： Unless aqueous acidic hydrogen peroxide solutions are stabilized, an excessive rate of decomposition of hydrogen peroxide precludes their use for treatment of metal surfaces, such as of copper and copper alloys, during which use substantial concentrations of decomposition catalysts build-up in solution. Regular monitoring of the solutions for residual stabilizer content would demand sophisticated analytical equipment beyond the reach of many users.The invention provides a stabilizer in the form of a block of sparingly soluble material, whereby monitoring can be simply and readily effected visually or by a simple electrical or mechanical detection system. For copper/copper alloys preferred stabilizers are p-hydroxybenzoic acid and triphenyl carbinol.

摘要翻译： 除非水性酸性过氧化氢溶液稳定，否则过氧化氢分解速度过高会阻止其用于处理金属表面，如铜和铜合金，在此期间，溶液中会堆积大量的分解催化剂。 定期监测残留稳定剂含量的解决方案将需要复杂的分析设备，超出许多用户的范围。 本发明提供了一种易溶性材料块形式的稳定剂，从而可以通过目视或简单的电或机械检测系统简单且容易地进行监测。 对于铜/铜合金，优选的稳定剂是对羟基苯甲酸和三苯基甲醇。

公开(公告)号：US4729835A

公开(公告)日：1988-03-08

申请号：US910969

申请日：1986-09-24

申请人： Alastair McNeillie ,  David B. Mobbs

发明人： Alastair McNeillie ,  David B. Mobbs

IPC分类号： C02F1/72

CPC分类号： C02F1/725 ,  C02F1/722 ,  Y10S210/916

摘要： Organic sulphides are extremely malodorous compounds that are found in gaseous or aqueous effluents from many industries such as paper and pulp manufacture, hydrocarbon refinering, tanneries, and in the synthesis of organic sulphur compounds. Their removal is necessary before such effluents can be discharged into the environment.In the present invention their removal is effected using hydrogen peroxide at a pH controlled to pH 8.5 to 11.5 and in the presence of a catalytic amount of a soluble tungstate. Such a process is especially applicable to the removal of dialkyl disulphides, which are regarded as being especially difficult to remove oxidatively. In especially preferred conditions, the pH is about pH 11 and about 3-4 moles H.sub.2 O.sub.2 is used per mole equivalent of sulphur, in the presence of at least 20 ppm sodium tungstate (as W).

摘要翻译： 有机硫化物是在许多行业的气态或水性流出物中发现的非常恶臭的化合物，例如纸和纸浆制造，烃精炼，制革厂和有机硫化合物的合成。 在将这些废水排放到环境中之前，必须拆除它们。 在本发明中，使用过氧化氢在pH值控制在pH 8.5至11.5，并在催化量的可溶性钨酸盐存在下进行除去。 这种方法特别适用于去除被认为特别难以氧化去除的二烷基二硫化物。 在特别优选的条件下，在至少20ppm钨酸钠（如W）存在下，pH为约11，并且每摩尔当量硫使用约3-4摩尔H 2 O 2。