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63 条记录 (耗时 0.026 秒)

    Process for the production of sodium dichromate
    22.
    发明授权
    Process for the production of sodium dichromate 失效
    生产重铬酸钠的方法

    公开(公告)号：US5250274A

    公开(公告)日：1993-10-05

    申请号：US824682

    申请日：1992-01-21

    申请人： Norbert Lonhoff ,  Bernhard Spreckelmeyer ,  Hans-Dieter Block ,  Rainer Weber ,  Jost Halstenberg ,  Bernd Rosenow

    发明人： Norbert Lonhoff ,  Bernhard Spreckelmeyer ,  Hans-Dieter Block ,  Rainer Weber ,  Jost Halstenberg ,  Bernd Rosenow

    IPC分类号： C01G37/14 ,  C01G37/00

    CPC分类号： C01G37/14

    摘要： The invention relates to a process for the production of sodium dichromate and sodium dichromate solutions by oxidative roasting of chrome ores under alkaline conditions, leaching of the furnace clinker obtained with water or an aqueous chromate-containing solution, adjustment of the pH to from 7 to 9.5, removal of the insoluble constituents by filtration, a sodium monochromate solution being obtained, conversion of the monochromate ions of this solution into dichromate ions by acidification and crystallization of sodium dichromate by concentration of this solution, characterized in that the acidification is carried out with carbon dioxide under pressure with removal of sodium hydrogen carbonate, the remaining solution is then very largely freed from sodium monochromate by cooling to a temperature below 10.degree. C. and filtration, any monochromate ions still present in the remaining solution are converted into dichromate ions by addition of an acid and the sodium monochromate filtered off is added to the sodium monochromate solution before conversion with carbon dioxide into a sodium dichromate solution.

    摘要翻译： 本发明涉及一种通过在碱性条件下对铬矿进行氧化焙烧生产重铬酸钠和重铬酸钠溶液的方法，用水或含铬酸盐水溶液浸取得到的炉渣，将pH调节至7至 9.5，通过过滤除去不溶性成分，得到单色钠溶液，通过浓缩该溶液酸化并重结晶重铬酸钠，将该溶液的单色离子转化为重铬酸根离子，其特征在于酸化是用 二氧化碳在压力下除去碳酸氢钠，剩余的溶液然后通过冷却到低于10℃的温度非常大地从单色钠中除去并过滤，剩余溶液中仍然存在的任何单色离子被转化成重铬酸根离子 加入酸和过滤的单色钠 在将二氧化碳转化成重铬酸钠溶液之前，将f加入到单色钠溶液中。

    Process for the preparation of chromic acid
    23.
    发明授权
    Process for the preparation of chromic acid 失效
    制备色素的方法

    公开(公告)号：US5181994A

    公开(公告)日：1993-01-26

    申请号：US625715

    申请日：1990-12-11

    申请人： Norbert Lonhoff ,  Ludwig Schmidt ,  Hans-Dieter Block ,  Rainer Weber

    发明人： Norbert Lonhoff ,  Ludwig Schmidt ,  Hans-Dieter Block ,  Rainer Weber

    IPC分类号： C25B1/00 ,  B01J47/12 ,  C01G37/033 ,  C25B1/22 ,  C25B15/08 ,  C25C1/10

    CPC分类号： C25C1/10 ,  C01G37/033 ,  C25B1/22

    摘要： A process for the production of chromic acid, comprisinga) dissolving ferrochrome in sulphuric acid, optionally with the addition of catholyte and/or anolyte overflow from the electrolysis,b) removing undissolved constituents by filtration,c) adding a reducing agent in a quantity more than equivalent to the quantity of iron(III) and chromium(IV) in the solution,d) precipitating chromium(III) hydroxide by raising the pH to about 4-6 by the addition of a base while maintaining the reducing conditions in the solution,e) separating the precipitated chromium hydroxide while maintaining the reducing conditions,f) working up the aqueous solution containing iron by oxidation; precipitating iron(III) hydroxide or iron(III) oxide and optionally isolating the sulphate in the solution as sodium sulphate, ammonium sulphate or calcium sulphate,g) dissolving the separated chromium hydroxide in chromic acid and optionally sulphuric acid where either a single solution in chromic acid is produced or two solutions are produced, one in chromic acid and another in sulphuric acid,h) separating the solution(s) from undissolved constituents andi) employing the chromium hydroxide solution in chromic acid as anolyte in the electrolytic production of chromic acid in an electrolytic cell divided by a membrane, and either using the same solution as catholyte in the electrolytic cell divided by a membrane or using the chromium hydroxide solution in sulphuric acid as catholyte in the electrolytic cell divided by a membrane, hydrogen and/or metallic chromium being deposited electrolytically at the cathode and/or chromium(II) ions being produced electrolytically.

    摘要翻译： 一种生产铬酸的方法，包括：a）将铬铁溶解在硫酸中，任选地从电解中加入阴极电解液和/或阳极电解液溢出物，b）通过过滤除去未溶解的组分，c）加入一定量的还原剂 大于等于溶液中铁（III）和铬（IV）的量，d）通过加入碱将pH升高至约4-6，沉淀出氢氧化铬（III），同时保持其中的还原条件 e）在保持还原条件的同时分离沉淀的氢氧化铬，f）通过氧化处理含铁的水溶液; 沉淀氧化铁（III）或氧化铁（III），并任选地将溶液中的硫酸盐分离为硫酸钠，硫酸铵或硫酸钙，g）将分离的氢氧化铬溶解在铬酸和任选的硫酸中， 产生铬酸或产生两种溶液，一种在铬酸中，另一种在硫酸中，h）将溶液与未溶解的组分分离，以及i）在铬酸的电解生产中使用铬酸中的氢氧化铬溶液作为阳极电解液 在电解槽中除以膜，在电解槽中用阴离子电解液分隔膜或使用硫酸中的氢氧化铬溶液作为阴极电解液，在电解槽中被膜，氢和/或 阴极电解沉积的金属铬和/或电解产生的铬（II）离子。

    Electrochemical process for the production of chromic acid
    26.
    发明授权
    Electrochemical process for the production of chromic acid 失效
    电化学工艺生产氯酸

    公开(公告)号：US5068015A

    公开(公告)日：1991-11-26

    申请号：US393733

    申请日：1989-08-15

    申请人： Hans-Dieter Block ,  Norbert Lonhoff ,  Bernd Makowka ,  Helmut Klotz ,  Rainer Weber ,  Bernhard Spreckelmeyer

    发明人： Hans-Dieter Block ,  Norbert Lonhoff ,  Bernd Makowka ,  Helmut Klotz ,  Rainer Weber ,  Bernhard Spreckelmeyer

    IPC分类号： C25B1/00 ,  C25B1/22 ,  C25B15/08

    CPC分类号： C25B1/22

    摘要： A process for the production of chromic acid by the multistage electrolysis of dichromate and/or monochromate solutions in two-compartment electrolysis cells, of which the anode and cathode compartments are separated by cation exchanger membranes, at temperatures in the range from 50.degree. to 90.degree. C., the dichromate and/or monochromate solutions being obtained by the digestion of chrome ores and leaching, the improvement wherein, optionally after the removal of aluminum, vanadium and other impurities, the monochromate solution obtained after leaching is adjusted at 20.degree. to 110.degree. C. to a pH value of from 8 to 12 by the addition and/or in situ formation of carbonate in a quantity of from 0.01 to 0.18 mol/l (for 300 to 500 g/l Na.sub.2 CrO.sub.4, converted with CO.sub.2 under pressure into a dichromate-containing solution, the dichromate-containing solution is introduced into the anode compartment of the electrolysis cell, a solution containing chromic acid, in which the molar ratio of Na ions to chromic acid is from 0.45:0.55 to 0.30:0.70, is electrolytically produced and the chromic acid is worked up by crystallization, washing and drying.

    摘要翻译： 通过在两室电解池中的重铬酸盐和/或单色溶液的多级电解生产铬酸的方法，其中阳极和阴极室由阳离子交换膜分离，温度范围为50至90℃ ℃，通过铬矿和沥滤的消解获得的重铬酸盐和/或单色溶液，其中任选地在除去铝，钒和其它杂质之后，将浸出后获得的单色溶液调节至20℃至 通过加入和/或原位形成量为0.01至0.18mol / l的碳酸盐（对于300至500g / l的Na 2 CrO 4，在压力下用CO 2转化），将pH值为8至12 将含有重铬酸盐的溶液引入电解槽的阳极室中，将含有铬酸的溶液与Na离子的摩尔比 欧米酸为0.45:0.55-0.30:0.70，经电解生产，铬酸通过结晶，洗涤和干燥处理。

    Aromatic polyphosphonates and a process for their production
    29.
    发明授权
    Aromatic polyphosphonates and a process for their production 失效
    芳香族聚膦酸酯及其生产工艺

    公开(公告)号：US4331614A

    公开(公告)日：1982-05-25

    申请号：US160646

    申请日：1980-06-18

    申请人： Manfred Schmidt ,  Ludwig Bottenbruch ,  Dieter Freitag ,  Klaus Reinking ,  Harry Rohr ,  Hans-Dieter Block

    发明人： Manfred Schmidt ,  Ludwig Bottenbruch ,  Dieter Freitag ,  Klaus Reinking ,  Harry Rohr ,  Hans-Dieter Block

    IPC分类号： C08G79/00 ,  C08G79/02 ,  C08G79/04 ,  C07F9/40

    CPC分类号： C08G79/04

    摘要： Thermoplastic, branched aromatic polyphosphonates with average molecular weights (number average M.sub.n) of from 11,000 to more than 200,000, obtainable by transesterifying (a) from 97 to 100 moles of at least one diaryl phosphonate, and (b) from 0 to 3 moles of at least one triaryl phosphate--the sum of the moled of (a) and (b) being 100--with (c) from 90 to 99 moles of at least one aromatic dihydroxy compound, and (d) from 0 to 3 moles of at least one aromatic trihydroxy or tetrahydroxy compound--with the proviso that at least one of the components (b) and (d) is present in a quantity of at least 0.001 mole and that, where (b) and (d) are used, the maximum limit on the moles is 3.0.

    摘要翻译： 平均分子量（数均Mn）为11,000至大于200,000的热塑性支链芳族聚膦酸酯，可通过（a）97-100摩尔的至少一种二芳基膦酸酯和（b）0-3摩尔的 至少一种磷酸三芳基酯，（a）和（b）的衍生物的总和为100-（c）90-99摩尔的至少一种芳族二羟基化合物，和（d）0-3摩尔的 至少一种芳族三羟基或四羟基化合物 - 条件是组分（b）和（d）中的至少一种以至少0.001摩尔的量存在，并且使用（b）和（d）时， 摩尔数的最大限度为3.0。

    Lower alkyl di propargyl phosphates
    30.
    发明授权
    Lower alkyl di propargyl phosphates 失效
    低级烷基二炔丙基磷酸酯

    公开(公告)号：US4257987A

    公开(公告)日：1981-03-24

    申请号：US76053

    申请日：1979-09-17

    申请人： Gunter Arend ,  Wolfgang Behrenz ,  Hans-Dieter Block

    发明人： Gunter Arend ,  Wolfgang Behrenz ,  Hans-Dieter Block

    IPC分类号： A01N57/00 ,  A01N57/02 ,  A01N57/10 ,  A01N57/12 ,  A01N57/22 ,  C07F9/113 ,  C07F9/12 ,  C07F9/173 ,  C07F9/18 ,  C07F9/32 ,  C07F9/40 ,  A01N57/14 ,  A01N57/16

    CPC分类号： C07F9/4078 ,  A01N57/02 ,  A01N57/12 ,  C07F9/113 ,  C07F9/3217 ,  C07F9/4006 ,  C07F9/4015

    摘要： Synergistic arthropodicidal compositions containing (1) a phosphorus-containing compound of the formula ##STR1## in which R.sup.1, R.sup.2 and R.sup.3 each independently is an optionally substituted alkyl, alkenyl or aryl radical, at least one of R.sup.1, R.sup.2 and R.sup.3 being an optionally substituted alkenyl radical unsaturated in the 2-position,X is oxygen or sulphur, andY and Z each independently is oxygen, sulphur or a direct bond; and if both Y and Z are oxygen or sulphur or a direct bond, then any of R.sup.1, R.sup.2 and R.sup.3 can denote propargyl in addition to the radicals indicated above,and (2) at least one (A) carbamate, (B) carboxylic acid ester, (C) phosphoric acid ester other than (1), (D) halogenocycloalkane or (E) halogenoalkane.

    摘要翻译： 含有（1）式（IMAGE）的含磷化合物的协同节肢动物杀伤组合物，其中R 1，R 2和R 3各自独立地是任选取代的烷基，烯基或芳基，R 1，R 2和R 3中的至少一个是任选的 2-取代的烯基不饱和，X是氧或硫，Y和Z各自独立地是氧，硫或直接键; 并且如果Y和Z都是氧或硫或直接键，则除了上述基团之外，R 1，R 2和R 3中的任一个可以表示炔丙基，和（2）至少一个（A）氨基甲酸酯，（B）羧酸 酸酯，（C）除（1），（D）卤代环烷烃或（E）卤代烷烃以外的磷酸酯。