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公开(公告)号：US4260846A
公开(公告)日：1981-04-07
申请号：US47448
申请日：1979-06-11
CPC分类号： C07C2/54 , C07C2/62 , C07C2527/054
摘要： An improved cyclic process for the alkylation of isoparaffins with olefins in the presence of a circulating concentrated sulfuric acid catalyst is disclosed. Improvement in the octane rating of the product alkylate is achieved by periodic fortification of the sulfuric acid catalyst with a sulfur trioxide-bearing fortifying agent under conditions wherein the harmful effects caused by contact of the sulfur trioxide with the hydrocarbons in the alkylation zone are minimized. The acid catalyst is fortified during less than about 15% of the cycles of the circulating acid catalyst through the alkylation system to maintain the water content of the acid catalyst in the range of above about 1% and below about 4% by weight. The process effects not only essentially 100% utilization of the fortifying agent for water removal but also improves the octane rating of the product alkylate while simultaneously extending the service life of the acid catalyst by allowing use of the catalyst having higher organic content.
摘要翻译： 公开了一种用于在循环浓硫酸催化剂存在下用烯烃烷基化异链烷烃的改进的循环方法。 烷基化产物的辛烷值的改进是通过在三氧化硫与烷基化区的接触引起的有害影响最小化的条件下，用含三氧化硫的强化剂对硫酸催化剂进行周期性强化来实现的。 酸催化剂在小于循环酸催化剂通过烷基化系统的约15％的循环中被强化，以将酸催化剂的水含量保持在约1％和低于约4％重量的范围内。 该方法不仅实质上利用了除水强化剂的100％，还提高了烷基化产物的辛烷值，同时通过使用具有较高有机含量的催化剂延长了酸催化剂的使用寿命。
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公开(公告)号：US4756899A
公开(公告)日：1988-07-12
申请号：US14422
申请日：1987-02-12
申请人： Theodore J. Jenczewski , Robert L. Sturtevant , Thomas R. Morgan , Barry J. Boghean , Donald C. Butt
发明人： Theodore J. Jenczewski , Robert L. Sturtevant , Thomas R. Morgan , Barry J. Boghean , Donald C. Butt
摘要： A process for manufacturing high purity anhydrous hydrogen fluoride (HF) having low levels of arsenic impurity by contacting anhydrous hydrogen fluoride product, or an intermediate product obtained during the manufacture of HF, with hydrogen peroxide in the presence of a catalyst which comprises effective amounts of molybdenum or an inorganic molybdenum compound and a phosphate compound. The volatile trivalent arsenic impurity in the anhydrous hydrogen fluoride is oxidized to a non-volatile pentavalent arsenic compound and the resultant mixture is distilled to recover high purity anhydrous hydrogen fluoride with reduced levels of arsenic impurity. In one embodiment, an oxidizing agent such as nitric acid or a nitrate salt is added to the reaction mixture to oxidize organic contaminants.
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3.发明授权
公开(公告)号：US4148836A
公开(公告)日：1979-04-10
申请号：US863656
申请日：1977-12-23
CPC分类号： C07C2/62 , C07C2/54 , C07C2527/054
摘要： An improved process for the alkylation of isoparaffins by olefins in the presence of a sulfuric acid catalyst is disclosed. Improvement in the octane rating of the product alkylate is achieved by the periodic fortification of the sulfuric acid catalyst with sulfur trioxide-bearing fortifying agents and the incorporation of a holding time to delay the return of the fortified acid to the alkylation zone. Fortification is employed less than 6% of the time the catalyst is in contact with the hydrocarbons and a preferred water content of between 1.5% and 2.5% is maintained in the acid. By maintaining an optimum water content and fortifying less frequently, lower water and organic build-up rates are observed than previously thought possible. By incorporation of a holding time before the acid is returned to the alkylation reactor, there is essentially complete utilization of the fortifying agent for water removal and no free SO.sub.3 is available for harmful side reactions with the hydrocarbon feeds in the reactor. When the organic impurities dispersed in the recycle acid are more completely removed prior to periodic fortification, a wider range of SO.sub.3 -bearing agents can be applied than previously thought possible. This nondestructive, periodic fortification process effects improvement in the octane rating of the product alkylate while simultaneously extending the service life of the sulfuric acid catalyst by allowing use of the acid to a higher final organic content.
摘要翻译： 公开了一种在硫酸催化剂存在下通过烯烃烷基化异链烷烃的改进方法。 烷基化产物的辛烷值的改进是通过硫酸催化剂与含三氧化硫的强化剂的周期性强化和引入保持时间来延迟强化酸返回到烷基化区来实现的。 在催化剂与烃接触的时间不到6％的情况下使用强化剂，在酸中保持1.5％至2.5％的优选水含量。 通过保持最佳含水量并且不太频繁地加强，观察到比以前认为可能的更低的水和有机物累积速率。 通过在酸返回到烷基化反应器之前加入保留时间，基本上完全利用强化剂去除水分，并且没有游离SO 3可用于与反应器中的烃进料的有害副反应。 当在周期性强化之前分散在再循环酸中的有机杂质更完全除去时，可以应用比以前认为可能的更宽范围的含SO 3的试剂。 这种非破坏性的周期性强化过程可以改善烷基化产物的辛烷值，同时通过允许使用酸达到更高的最终有机物含量来延长硫酸催化剂的使用寿命。
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公开(公告)号：US4053573A
公开(公告)日：1977-10-11
申请号：US633765
申请日：1975-11-20
CPC分类号： C01B17/58 , Y10S423/02
摘要： Improvement in the method for recovering sulfur values in the form of sulfur dioxide from spent sulfuric acid by decomposing the spent sulfuric acid at elevated temperature in the presence of elemental sulfur to generate a sulfur dioxide-containing gas stream, which involves: (a) introducing the spent sulfuric acid into a pool of molten sulfur maintained at temperature of at least about 250.degree. C. to thereby generate a gaseous stream comprising sulfur dioxide, vaporous elemental sulfur, and water; (b) cooling said gaseous stream to temperature above the melting point of the sulfur but below about 160.degree. C. to condense elemental sulfur therefrom, separating the condensed elemental sulfur and returning it to the pool of molten sulfur; followed by (c) further cooling the gaseous stream from which elemental sulfur has been condensed to condense water therefrom, and separating the condensed water from the gaseous stream.
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公开(公告)号：US4043822A
公开(公告)日：1977-08-23
申请号：US633775
申请日：1975-11-20
CPC分类号： C01B17/507 , Y10S423/03
摘要： Process for transforming water-soluble metal sulfate residue obtained from spent sulfuric acid containing inorganic impurities, such as pickle liquors or acid wastes from hydrometallurgical processes, into substantially water-insoluble form suitable for disposal which comprises introducing the residue into a pool of molten sulfur maintained at temperature of at least about 250.degree. C. to thereby generate a gaseous stream comprising sulfur dioxide and to transform the metal sulfate residue into corresponding reduction products, and recovering sulfur dioxide and reduction products associated with sulfur in solid form suitable for disposal.
摘要翻译： 将从含有无机杂质（例如酸洗液或来自湿法冶金过程的酸性废物）的无水杂质获得的水溶性金属硫酸盐残余物转化成适于处理的基本上不溶于水的形式的方法，包括将残余物引入维持的熔融硫池中 在至少约250℃的温度下，从而产生包含二氧化硫的气流，并将金属硫酸盐残余物转化为相应的还原产物，并回收与适合处置的固体形式的硫相关的二氧化硫和还原产物。
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