METHOD FOR PURIFYING SPENT ACID
    1.
    发明申请
    METHOD FOR PURIFYING SPENT ACID 审中-公开
    净化活性酸的方法

    公开(公告)号:WO2004094037A1

    公开(公告)日:2004-11-04

    申请号:PCT/US2004/011991

    申请日:2004-04-15

    Applicant: RHODIA INC.

    Abstract: A method for purifying a spent acid catalyst from an acid catalyzed chemical reaction that generates a mixture of a product, spent acid and tar, includes the steps of separating the mixture of product, spent acid, and tar into a product fraction and a spent acid fraction, said spent acid fraction comprising a mixture of spent acid and tas, and separating the spent acid fraction, by flotation separation, centrifugation, or Iiquid-Iiquid coalescence, into a tar fraction and a de tarred spent acid fraction. The fluidized tar and the de­ tarred spent acid can each be further processed to produce concentrated acid.

    Abstract translation: 从产生产物,废酸和焦油的混合物的酸催化化学反应中纯化废酸催化剂的方法包括以下步骤:将产物,废酸和焦油的混合物分离成产物级分和废酸 所述废酸组分包含废酸和塔斯的混合物,并通过浮选分离,离心或液体 - 液体聚结将废酸馏分分离成焦油馏分和脱沥青的废酸馏分。 流化焦油和去焦油的废酸可以进一步加工以产生浓酸。

    VERFAHREN ZUR HERSTELLUNG VON SCHWEFELSÄURE
    2.
    发明申请
    VERFAHREN ZUR HERSTELLUNG VON SCHWEFELSÄURE 审中-公开
    用于生产硫酸

    公开(公告)号:WO2009060022A1

    公开(公告)日:2009-05-14

    申请号:PCT/EP2008/065044

    申请日:2008-11-06

    CPC classification number: C01B17/76 C01B17/54 C01B17/58

    Abstract: Vorgeschlagen wird ein Verfahren zur Herstellung von Schwefelsäure, wonach schwefeldioxidhaltige Prozessgase durch Verbrennung von flüssigem Schwefel mit Prozessluft, die von außen zugeführt wird, oder durch Spaltung von Abfallschwefelsäuren erhalten werden, und das Schwefeldioxid aus den schwefelhaltigen Prozessgasen zu Schwefeltrioxid oxidiert und in Schwefelsäure nach dem Kontaktverfahren übergeführt wird, das dadurch gekennzeichnet ist, dass die Prozessluft, die von außen zur Verbrennung von Schwefel zugeführt wird, oder die schwefeldioxidhaltigen Prozessgase, die durch Spaltung von Abfallschwefelsäure erhalten werden, in ihrem Wasserdampfgehalt reduziert werden, indem sie gekühlt werden.

    Abstract translation: 用于生产硫酸的过程,在这之后的硫通过与从外部供给处理空气的液体硫的燃烧过程的气体含有二氧化,或由废硫酸裂解可以得到,并从含硫的工艺气体二氧化硫提出了通过在接触过程氧化成三氧化硫和硫酸 被转换,其特征在于,其中从外部供给为硫或含二氧化硫的工艺气体,其通过的废硫酸的裂解而获得的燃烧过程中的空气在水蒸汽含量通过冷却减少。

    A METHOD FOR TREATING A WASTE CONTAINING SULFURIC ACID
    3.
    发明申请
    A METHOD FOR TREATING A WASTE CONTAINING SULFURIC ACID 审中-公开
    一种处理含有硫酸的废物的方法

    公开(公告)号:WO2016067085A1

    公开(公告)日:2016-05-06

    申请号:PCT/IB2015/001996

    申请日:2015-10-27

    Abstract: A method for treating a waste material (20) containing sulfuric acid and metal ions, as In the case of the waste material the production of the T1O2, provides mixing to the waste material (20) an alkaline reagent (10), selected among a hydroxide of an alkaline metal such as Mg, Zn, Sn, adapted to selectively precipitate (300) the cations as hydroxides, thus obtaining a first mixture (21) having a higher pH that contains a solution (22) of a sulfate and/or oxysulfate of the metal and solid hydroxides (23) of the metal cations that are separated from the first mixture (21) and can be used in metal sulfates production process. The method also comprises mixing the solution (22) with a precipitation agent (31), thus forming a second mixture (32) in which the sulfate and/or oxysulfate precipitates and is removed (301), heated, reduced and decomposed (400) by means of a reducing agent (41) selected among elemental sulfur, hydrogen and a reducing flame, thus obtaining SO 2 (42) available for making H 2 SO 4 , and a solid oxide (43) of the metal of the alkaline reagent that is recycled (101) as alkaline reagent (10) in the step (200) of mixing with the waste material (20). Advantageously, a step (350) is provided of recovering precipitation agent (31) from the water of second mixture (32), after removing (301) the sulfate and/or oxysulfate, and a step (351) is also provided of recycling the regenerated precipitation agent (31), In particular, an alcohol as ethyl alcohol, used as the precipitation agent (31), can be easily regenerated by distillation, exploiting low temperature-heat, which is largely available from a possible sulfuric acid production plant close to the plant that producing the sulfuric waste material (20). The method according to the invention makes it possible to eliminate the sludge resulting from the sulfuric waste material treatment, while recovering valuable compounds.

    Abstract translation: 一种用于处理含有硫酸和金属离子的废料(20)的方法,如在废物的情况下,生成T1O2,向废料(20)提供碱性试剂(10),该碱性试剂(10)选自 适于选择性沉淀(300)阳离子为氢氧化物的碱金属如Mg,Zn,Sn的氢氧化物,从而获得具有较高pH值的第一混合物(21),其含有硫酸盐溶液(22)和/或 与第一混合物(21)分离的金属阳离子的金属和固体氢氧化物(23)的硫代硫酸盐,可用于金属硫酸盐生产过程。 该方法还包括将溶液(22)与沉淀剂(31)混合,从而形成第二混合物(32),其中硫酸盐和/或氧代硫酸盐沉淀并除去(301),加热,还原和分解(400) 通过从元素硫,氢和还原火焰中选择的还原剂(41),从而获得可用于制备H 2 SO 4的SO 2(42)和再循环的碱性试剂的金属的固体氧化物(43)(101 )作为与废料(20)混合的步骤(200)中的碱性试剂(10)。 有利地,提供步骤(350),在除去(301)硫酸盐和/或硫酸氢盐之后,从第二混合物(32)的水中回收沉淀剂(31),并且还提供步骤(351) 再生沉淀剂(31)特别是用作沉淀剂(31)的醇作为乙醇,可以通过蒸馏容易地再生,开发低温热,这在很大程度上可以从可能的硫酸生​​产装置中获得 到生产硫酸废料(20)的工厂。 根据本发明的方法可以在回收有价值的化合物的同时,消除由硫酸废料处理产生的污泥。

    TREATMENT OF LIQUID WASTE MATERIAL
    4.
    发明申请
    TREATMENT OF LIQUID WASTE MATERIAL 审中-公开
    液体废物处理

    公开(公告)号:WO1993013362A1

    公开(公告)日:1993-07-08

    申请号:PCT/GB1992002330

    申请日:1992-12-16

    CPC classification number: F23G7/008 C01B17/58 Y02E20/12 Y02E20/344 Y02P20/129

    Abstract: Liquid waste material, particularly material containing sulphuric acid, may be combusted using an oxygen-rich material by a process in which: (i) a primary oxidant and fuel issuing from a burner are combusted in a furnace, the proportion of primary oxidant to fuel being such that there is insufficient oxygen to combust the fuel completely, (ii) introducing into the furnace the liquid waste material in atomised form around the burner, (iii) introducing into the furnace spaced from the burner a secondary oxidant which contains sufficient oxygen to combust completely the fuel not combusted by the primary oxidant the direction in which each of the primary oxidant, fuel and liquid waste material is introduced being such that the substances flow in substantially the same direction, the rate at which the primary oxidant, fuel, liquid waste material and secondary oxidant are introduced being such that a plug flow of substances through the furnace is created.

    Abstract translation: 液体废料,特别是含硫酸的材料可以使用富氧材料燃烧,其中:(i)主要氧化剂和从燃烧器排出的燃料在炉中燃烧,初级氧化剂与燃料的比例 使得氧气不足以完全燃烧燃料,(ii)将燃烧器周围的雾化形式的废液材料引入炉内,(iii)将与燃烧器间隔开的炉子中引入含有足够氧气的二次氧化剂 完全燃烧未被主要氧化剂燃烧的燃料,其中引入每种主要氧化剂,燃料和废液和废液的方向使得物质以基本相同的方向流动,初级氧化剂,燃料,液体的速率 引入废料和二次氧化剂,使得产生通过炉的物质的活塞流。

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