Process for production of amino acid hydrochloride and caustic via
electrodialysis water splitting
    41.
    发明授权
    Process for production of amino acid hydrochloride and caustic via electrodialysis water splitting 有权
    通过电渗析水分解制备氨基酸盐酸盐和苛性碱的方法

    公开(公告)号:US06110342A

    公开(公告)日:2000-08-29

    申请号:US223054

    申请日:1998-12-30

    申请人: K. N. Mani

    发明人: K. N. Mani

    摘要: The invention uses a stack of three compartment electrodialysis cells in a process for the production amino acid hydrochloride and an alkali. The electrodialysis cell contains bipolar, cation and anion membranes which are arranged to form acid, base and salt compartments. The process begins with supplying a salt solution to the salt compartment, water to the base compartment, and a liquid comprising an amino acid to the acid compartment. Preferably, the feed salt is sodium chloride or potassium chloride or lithium chloride. A direct current driving force is applied across the cell to convert the salt solution to an alkali in the base compartments and an amino acid hydrochloride in the acid compartment. The acid and alkali solutions and a depleted salt solution are withdrawn from their respective compartments. A chelating agent may be added to the salt solution before it is fed into the electrodialysis cell.

    摘要翻译: 本发明在生产氨基酸盐酸盐和碱的方法中使用三层电渗析池的堆叠。 电渗析池包含双极,阳离子和阴离子膜,其被布置成形成酸,碱和盐隔室。 该过程开始于向盐室提供盐溶液,向基室提供水,以及向酸室提供包含氨基酸的液体。 进料盐优选为氯化钠或氯化钾或氯化锂。 将电流驱动力施加在电池上,以将盐溶液转变成碱性隔室中的碱和酸室中的氨基酸盐酸盐。 酸和碱溶液和贫化盐溶液从它们各自的隔室中排出。 可以将盐酸溶液中的螯合剂加入到电渗析池中。

    Process for pelletising particles of alkali metal ferrite
    42.
    发明授权
    Process for pelletising particles of alkali metal ferrite 失效
    造粒碱金属铁氧体颗粒的方法

    公开(公告)号:US5552099A

    公开(公告)日:1996-09-03

    申请号:US397144

    申请日:1995-05-03

    摘要: The specification describes a process for pelletising particles of an alkali metal ferrite with an aqueous binder such as a black liquor derived from pulping wood chips. The particles are ground and fed to a microgranulator in measured quantities together with measured quantities of aqueous binder. The particles are ground such that they have an even size distribution about a mean in the range from 25 to 50 microns. The particles are mixed with the binder in the microgranulator to form microgranules which are fed to a pelletising pan. The temperature of the microgranules on the pelletising pan is controlled by cooling either or both the alkali metal ferrite or aqueous binder prior to measuring them into the microgranulator. A pan temperature of less than 70.degree. C. is disclosed.

    摘要翻译: PCT No.PCT / AU93 / 00500 Sec。 371日期:1995年5月3日 102(e)日期1995年5月3日PCT提交1993年9月30日PCT公布。 公开号WO94 / 07595 日期1994年04月14日该说明书描述了一种用水性粘合剂如来自制浆木片的黑液造粒碱金属铁氧体颗粒的方法。 将颗粒研磨并以测量的量与测量量的含水粘合剂一起进料至微粒化微球。 将颗粒磨碎,使得它们具有约25至50微米范围内的平均尺寸分​​布。 将颗粒与微粒体中的粘合剂混合以形成微丸,将其送入造粒盘。 在将颗粒测量到微晶粒之前,通过冷却碱金属铁氧体或水性粘合剂中的任一种或两者来控制造粒盘上的微粒的温度。 公开了低于70℃的锅温。

    Process for regenerating an alkaline stream containing mercaptan
compounds
    44.
    发明授权
    Process for regenerating an alkaline stream containing mercaptan compounds 失效
    再生含有硫醇化合物的碱性物流的方法

    公开(公告)号:US4666689A

    公开(公告)日:1987-05-19

    申请号:US818078

    申请日:1986-01-13

    IPC分类号: C10G19/08 C01D1/04

    CPC分类号: C10G19/08

    摘要: An alkaline solution containing mercaptides is regenerated in an improved process wherein the alkaline solution to be regenerated containing a suitable oxidation catalyst is contacted with an oxygen-containing solvent which is immiscible with said alkaline solution in a reaction zone comprising a plurality of fibers positioned longitudinally within a conduit, whereby the two liquids are in contact while concurrently flowing through said reaction zone during which the mercaptides contained in the alkaline solution are oxidized to disulfides and are simultaneously extracted from the alkaline solution into the solvent solution.

    摘要翻译: 包含硫醇盐的碱性溶液在改进的方法中再生,其中将含有合适的氧化催化剂的待再生碱性溶液与含有溶剂的含氧溶剂接触,该反应区包含多个位于纵向内的纤维的反应区 导管,由此两种液体在同时流过所述反应区域期间接触,其中碱溶液中所含的硫醇盐被氧化成二硫化物,同时从碱性溶液中萃取到溶剂溶液中。

    Process for the manufacture of caustic soda
    45.
    发明授权
    Process for the manufacture of caustic soda 失效
    苛性钠制造工艺

    公开(公告)号:US4626426A

    公开(公告)日:1986-12-02

    申请号:US764110

    申请日:1986-08-09

    申请人: Theodore A. Rado

    发明人: Theodore A. Rado

    IPC分类号: C01D1/04 C01F11/18 C01F5/24

    CPC分类号: C01F11/18 C01D1/04

    摘要: There is provided a process for preparing caustic soda solutions from naturally occurring alkaline minerals comprising double salts of sodium carbonate and calcium carbonate. The process comprises heating said naturally occurring alkaline minerals to temperatures sufficient to dehydrate and partially decarbonate said alkaline minerals and provide an intermediate product of a mixture of sodium carbonate and calcium oxide. This intermediate then is contacted with water to effect causticization of the sodium carbonate and provide a recoverable phase comprising an aqueous solution of caustic soda.

    摘要翻译: 提供了一种由包含碳酸钠和碳酸钙的双重盐的天然存在的碱性矿物制备苛性钠溶液的方法。 该方法包括将所述天然存在的碱性矿物质加热至足以使所述碱性矿物脱水并部分脱碳的温度,并提供碳酸钠和氧化钙混合物的中间产物。 然后将该中间体与水接触以实现碳酸钠的苛化,并提供包含苛性钠水溶液的可回收相。

    Alkali regeneration process
    46.
    发明授权
    Alkali regeneration process 失效
    碱再生过程

    公开(公告)号:US4486394A

    公开(公告)日:1984-12-04

    申请号:US557145

    申请日:1983-11-01

    CPC分类号: C01D1/04 D21C11/04

    摘要: The invention relates to an improvement in a method of regenerating alkaline or alkaline earth metal oxides or hydroxides from solution particularly in delignification processes wherein a suitable transition metal such as ferric oxide is burnt with the solution to produce a mixed oxide that is subsequently treated in hot water to regenerate the alkaline or alkaline earth metal oxide or hydroxide and precipitate the transition metal oxide. The improvement controls the presence of fines in the transition metal oxide to maintain these at an acceptable level in the fluidized bed combustion zone. This is achieved by contacting the fines with spent liquor from a delignification process. The invention also provides for the pelletization of the fine material of the transition metal oxide and spent delignification liquor can be used as a binder in the formation of such pellets.

    摘要翻译: PCT No.PCT / AU83 / 00035 Sec。 371日期:1983年11月1日 102(e)1983年11月1日日期PCT提交1983年3月24日PCT公布。 公开号WO83 / 03407 日期:1983年10月13日本发明涉及一种从溶液中再生碱土金属或碱土金属氧化物或氢氧化物的方法的改进,特别是在脱木质过程中,其中将适当的过渡金属如氧化铁与该溶液一起燃烧以产生混合 氧化物,其随后在热水中处理以再生碱土金属或碱土金属氧化物或氢氧化物并沉淀过渡金属氧化物。 该改进控制过渡金属氧化物中的细粉存在,以将它们维持在流化床燃烧区的可接受的水平。 这是通过将罚款与脱木质过程中的废液接触来实现的。 本发明还提供过渡金属氧化物的精细材料的造粒,并且废弃的脱木素液可以用作形成这种颗粒的粘合剂。

    Alkali regeneration process
    47.
    发明授权
    Alkali regeneration process 失效
    碱再生过程

    公开(公告)号:US4224289A

    公开(公告)日:1980-09-23

    申请号:US31215

    申请日:1979-04-18

    摘要: In the regeneration of alkaline liquors as used in paper pulping, a mixed oxide compound of an alkali or alkaline earth metal oxide and an oxide of Ti, Fe, Co, Ni, or Mn is formed by burning black liquor. The burning step is carried out in a fluidized bed. The mixed oxide product is washed in cold water and subsequently treated with hot water to precipitate the oxide of Ti, Fe, Co, Ni or Mn and enable recovery of the alkaline solution for recycling.

    摘要翻译: 在制纸中使用的碱性液体的再生中,通过烧黑液形成碱金属或碱土金属氧化物的混合氧化物和Ti,Fe,Co,Ni或Mn的氧化物。 燃烧步骤在流化床中进行。 将混合氧化物产物在冷水中洗涤,随后用热水处理以沉淀Ti,Fe,Co,Ni或Mn的氧化物,并使碱性溶液回收再循环。

    Process for production of sodium thiosulfate and sodium hydroxide
    48.
    发明授权
    Process for production of sodium thiosulfate and sodium hydroxide 失效
    硫代硫酸钠和氢氧化钠的生产工艺

    公开(公告)号:US4162187A

    公开(公告)日:1979-07-24

    申请号:US796078

    申请日:1977-05-12

    摘要: Sodium sulfide or sodium hydrosulfide is oxidized to form sodium polysulfide and sodium hydroxide which may be further oxidized to sodium thiosulfate and sodium hydroxide. The oxidant is air, oxygen or oxygen in mixture with other gases, the reductant is aqueous sodium sulfide or sodium hydrosulfide and the reaction is carried out with both reactants in non-flooded contact with a solid catalyst material, of which a typical example is a particulate carbon treated with polytetrafluoroethylene (PTFE). The reaction is typically conducted at atmospheric pressure and without the application of heat, with the oxidant and the reductant being in interfacial contact with each other, but only, insofar as possible, at sites where both are simultaneously in contact with a catalyst which is prevented from being flooded by either the oxidant or reductant.

    摘要翻译: 硫化钠或硫氢化钠被氧化形成多硫化钠和氢氧化钠,可以进一步氧化成硫代硫酸钠和氢氧化钠。 氧化剂是与其他气体混合的空气,氧气或氧气,还原剂是硫化钠水溶液或氢硫化钠,并且两种反应物都与固体催化剂材料非淹没接触进行反应,其典型的例子是 用聚四氟乙烯(PTFE)处理的颗粒碳。 反应通常在大气压下进行,而不加热,氧化剂和还原剂彼此界面接触,但只要尽可能在两者同时与预防的催化剂接触的位置进行 不被氧化剂或还原剂淹没。

    Process for recovery of potassium from manganate plant wastes
    50.
    发明授权
    Process for recovery of potassium from manganate plant wastes 失效
    从锰酸盐植物废物中回收钾的工艺

    公开(公告)号:US4085191A

    公开(公告)日:1978-04-18

    申请号:US791005

    申请日:1977-04-26

    IPC分类号: C01D1/20 C01G45/12 C01D1/04

    CPC分类号: C01G45/1214

    摘要: Potassium is recovered as a dilute KOH solution from residue solids resulting from conversion of manganese ore to K.sub.2 MnO.sub.4 by reacting the solids with a Ca(OH).sub.2 under specified conditions. The resulting KOH solution can be returned to the K.sub.2 MnO.sub.4 plant and the solids of reduced potassium content are suitable for disposal in a landfill.

    摘要翻译: 从指定条件下通过使固体与Ca(OH)2反应使锰矿石转化成K2MnO4的残留固体,将钾作为稀释的KOH溶液回收。 所得到的KOH溶液可以返回到K2MnO4装置,并且减少的钾含量的固体适合在垃圾填埋场中处理。