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    • 21. 发明授权
    • Process of making calcium acetate deicing agents
    • 制造醋酸钙除冰剂的工艺
    • US4377488A
    • 1983-03-22
    • US333037
    • 1981-12-21
    • Alan B. Gancy
    • Alan B. Gancy
    • C07C51/41C09K3/18C01F11/00
    • C09K3/185C07C51/412
    • A process of making a calcium acetate-containing solution having a pH value at room temperature between about 7 and about 8 is provided comprising reacting acetic acid with a carbonate compound, adding calcined limestone, and optionally finishing off the acid-base reaction with an amount of an alkali metal hydroxide comprising from about 2% to about 5% of the total stoichiometric complement to the amount of acetic acid. Further process options which may be used in the preparation of deicing agents include adding coarse limestone to the above-prepared calcium acetate-containing solution in amounts up to 10% by weight and converting the solution into solid flakes.
    • 提供一种使室温pH值在约7至约8之间的含有醋酸钙的溶液的方法,包括使乙酸与碳酸酯化合物反应,加入煅烧石灰石,并任选地用酸碱反应去除一定量 的碱金属氢氧化物,占总化学计量互补物的约2%至约5%至乙酸的量。 可用于除冰剂制备中的其它方法包括将粗石灰石加入到上述制备的含乙酸钙溶液中,其用量高达10重量%,并将该溶液转化成固体薄片。
    • 23. 发明授权
    • Process for reducing water content of sulfuric acid in hydrocarbon
alkylations
    • 降低烃烷基化中硫酸含量的方法
    • US4148836A
    • 1979-04-10
    • US863656
    • 1977-12-23
    • Robert L. SturtevantBela I. KarsayAlan B. Gancy
    • Robert L. SturtevantBela I. KarsayAlan B. Gancy
    • C07C2/54C07C2/62C07C3/54
    • C07C2/62C07C2/54C07C2527/054
    • 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.
    • 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。
    • 24. 发明授权
    • Soluble silicate reduction in calcined trona liquors
    • 煅烧天然碱液中的可溶性硅酸盐还原
    • US4021526A
    • 1977-05-03
    • US587585
    • 1975-06-17
    • Alan B. GancyRustom P. Poncha
    • Alan B. GancyRustom P. Poncha
    • C01D7/37C01D7/00
    • C01D7/37
    • In the process of making sodium carbonate from trona by the method involving crushing the trona, calcining it and dissolving it in an aqueous medium for purification by crystallization, soluble silicate contamination of the crystallization liquor is reduced by an improvement which involves: (a) segregating the calcined trona into a coarse and a fine fraction; (b) separately dissolving the coarse and fine fractions to obtain aqueous solutions of sodium carbonate, sodium silicates and insoluble impurities; (c) optionally adding to the solution of the fine fraction insoluble impurities which have been separated from a solution of such fine fraction in a previous operation; followed by (d) digesting the solution of the fine fraction containing added insolubles at elevated temperature to insolubilize soluble silicates and separating the digested solution from insoluble impurities.
    • 在通过包括粉碎天然碱的方法制备碳酸钠的过程中,将其煅烧并将其溶解在水性介质中以通过结晶进行纯化,结晶液的可溶性硅酸盐污染通过改进降低,其包括:(a)分离 将煅烧的天然碱变成粗和细级分; (b)分别溶解粗细级分,得到碳酸钠,硅酸钠和不溶性杂质的水溶液; (c)任选地在以前的操作中向已经从这种细级分溶液中分离出的细小级不溶性杂质溶液中加入; 然后(d)在升高的温度下将含有不溶物的细小级分的溶液消化,使可溶性硅酸盐不溶解并将消化的溶液与不溶性杂质分离。
    • 25. 发明授权
    • Process for the manufacture of magnesium calcium acetate
    • 乙酸钙镁的制造方法
    • US5162580A
    • 1992-11-10
    • US217660
    • 1988-07-12
    • Alan B. Gancy
    • Alan B. Gancy
    • C09K3/18
    • C09K3/185
    • Superior quality magnesium calcium acetate (hydrate) granules of industrial grade are produced from a concentrated aqueous solution of magnesium acetate containing limited amounts of calcium acetate. The hot solution, or process liquor, is carefully pH-adjusted prior to further processing, and may be slightly acidified with excess acetic acid to offset downstream hydrolysis during the granulation/drying stage.Process liquor hydrolysis is avoided by maintaining liquor temperature and residence time within prescribed limits.Process liquor may be optionally clarified of mineral insolubles deriving from raw material, and of excess, unwanted calcium acetate solids prior to further processing. From such clarified liquor a purer, technical grade magnesium acetate (hydrate) granular product is derived.Hot process liquor may be passed through a short residence time heating zone prior to granulation/drying in order to provide additional sensible heat going to the granulation/drying operation. At the short residence times prescribed, hydrolysis of process liquor is avoided.A key feature of the invention is the relatively low energy requirement, due to the low process liquor drying requirement. Such a low net water loss requirement is due to the unusually high concentrations of process liquor achievable, and to the production of a stable tetrahydrate of magnesium acetate product.Product granules of the present invention, free of unreacted ore, and of hydrolysis product, show much improved rates of ice-melting, and are elatively less corrosive to metals.
    • 工业级的优质醋酸钙(水合物)颗粒由含有限量的乙酸钙的浓缩的乙酸镁水溶液制备。 热处理液或加工液在进一步加工之前经过小心的pH调节,并且可能在过量的乙酸中稍微酸化以在造粒/干燥阶段期间抵消下游的水解。 通过将液体温度和停留时间保持在规定限度内来避免处理液体水解。 处理液可以在进一步处理之前任选地澄清源自原料的矿物不溶物和过量的不需要的乙酸钙固体。 从这种澄清液中得到更纯的工业级的乙酸镁(水合物)颗粒产物。 热处理液可以在造粒/干燥之前通过短暂停留时间加热区,以便提供进一步的造粒/干燥操作的显热。 在规定的停留时间短的情况下,避免了处理液的水解。 本发明的一个关键特征是由于处理液干燥要求低,所以能量需求相对较低。 这种低的净水损失要求是由于可达到的处理液浓度异常高,以及生产稳定的四水合醋酸镁产品。 没有未反应矿石和水解产物的本发明的产品颗粒显示出大大提高的冰融化速率,并且对金属的腐蚀性更低。
    • 27. 发明授权
    • Process of making calcium acetate deicing agents and product
    • 制造醋酸钙除冰剂和产品的工艺
    • US4444672A
    • 1984-04-24
    • US486857
    • 1983-04-20
    • Alan B. Gancy
    • Alan B. Gancy
    • C07C51/41C09K3/18C01F11/00
    • C09K3/185C07C51/412
    • A process of making a calcium acetate-containing solution having a pH value at room temperature between about 7 and about 8 is provided comprising reacting acetic acid with a carbonate compound, adding calcined limestone, and optionally finishing off the acid-base reaction with an amount of an alkali metal hydroxide comprising from about 2% to about 5% of the total stoichiometric complement to the amount of acetic acid. Further process options which may be used in the preparation of deicing agents include adding coarse limestone to the above-prepared calcium acetate-containing solution in amounts up to 10% by weight and converting the solution into solid flakes. The calcium acetate salt product can be mixed with an inert solid material having good anti-slip properties.
    • 提供一种使室温pH值在约7至约8之间的含有醋酸钙的溶液的方法,包括使乙酸与碳酸酯化合物反应,加入煅烧石灰石,并任选地用酸碱反应去除一定量 的碱金属氢氧化物,占总化学计量互补物的约2%至约5%至乙酸的量。 可用于除冰剂制备中的其它方法包括将粗石灰石加入到上述制备的含乙酸钙溶液中,其用量高达10重量%,并将该溶液转化成固体薄片。 乙酸钙盐产品可与具有良好防滑性能的惰性固体材料混合。