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81.发明授权
公开(公告)号：US5593653A
公开(公告)日：1997-01-14
申请号：US294604
申请日：1994-08-23
CPC分类号： C01B11/023 , C01D5/00
摘要： Sodium sesquisulfate produced in crystalline form in a high acidity highly efficient chlorine dioxide generating process is converted by metathesis to crystalline anhydrous neutral sodium sulfate and the acid recovered as a result is recycled to the chlorine dioxide generating step. The metathesis is effected by contacting the crystalline sodium sesquisulfate with aqueous sodium chlorate solution, aqueous sodium chloride solution, aqueous methanol or water alone. The metathesis is effected in such manner as to minimize the additional evaporative load imposed on the chlorine dioxide generating process by the metathesis medium.
摘要翻译： 在高酸度高效二氧化氯生成过程中以结晶形式生产的倍半硫酸钠通过复分解转化为结晶无水中性硫酸钠，结果回收的酸被再循环到二氧化氯产生步骤中。 复分解是通过使结晶倍半硫酸钠与氯酸钠水溶液，氯化钠水溶液，甲醇水溶液或单独的水接触来实现的。 复分解体以使复分解介质施加在二氧化氯产生过程附加的额外蒸发负荷最小化的方式进行。
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公开(公告)号：US5549788A
公开(公告)日：1996-08-27
申请号：US113642
申请日：1993-08-31
申请人： Tuomo S. Nykanen , Brian F. Greenwood , Johan Gullichsen , Erkki Kiiskila , Esko Mattelmaki , Joseph R. Phillips , Jan T. Richardsen , Rolf Ryham , Jarmo Soderman , Karl G. Wiklund
发明人： Tuomo S. Nykanen , Brian F. Greenwood , Johan Gullichsen , Erkki Kiiskila , Esko Mattelmaki , Joseph R. Phillips , Jan T. Richardsen , Rolf Ryham , Jarmo Soderman , Karl G. Wiklund
IPC分类号： C01B7/01 , C01D1/04 , C01D3/04 , C01D5/00 , C01D7/00 , D21C11/00 , D21C11/06 , D21C11/10 , D21C11/12
CPC分类号： C01B7/01 , C01D1/04 , C01D3/04 , C01D5/00 , C01D7/00 , D21C11/0007 , D21C11/0021 , D21C11/0028 , D21C11/066 , D21C11/10 , D21C11/12 , Y10S162/08
摘要： Effluents are minimized from a cellulose pulp mill having a recovery boiler by concentrating liquid effluents from the bleach plant and/or liquid spills from process streams, incinerating the concentrated effluents in the recovery boiler, removing particles present in the flue gases from the recovery boiler to produce an ash including salts containing potassium and chloride, and sulfur compounds, and removing the potassium and chloride from the ash while returning the sulfur containing compounds to the recovery loop, so as to balance the sulfur, chloride and potassium levels in the mill. The sulfur is typically returned directly to a stream of black liquor just before entry into the recovery boiler. Green liquor is produced from the melt, which preferably is treated to remove metals from it prior to caustization (e.g. by sedimentation and/or filtration), and prior to green liquor crystallization to produce sodium hydroxide.
摘要翻译： 通过从漂白设备中浓缩液体流出物和/或来自工艺物流的液体溢出，焚化回收锅炉中的浓缩废水，将来自回收锅炉的烟道气中存在的颗粒除去，从具有回收锅炉的纤维素纸浆厂中将废水最小化 产生包含含有氯化钾和氯化物的盐的灰分和硫化合物，并将灰分中的钾和氯从灰分中除去，同时将含硫化合物返回到回收回路中，以平衡磨机中的硫，氯和钾的含量。 在进入回收锅炉之前，硫通常直接返回到黑液流中。 从熔体中生产绿液，其优选在去除（例如通过沉淀和/或过滤）之前以及在绿液结晶以产生氢氧化钠之前经处理以从其中除去金属。
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83.发明授权Production of useful materials including synthetic nepheline from Bayer red mud 失效生产有用材料，包括来自拜耳红泥的合成霞石
公开(公告)号：US4810682A
公开(公告)日：1989-03-07
申请号：US60172
申请日：1987-06-10
申请人： William H. Andrews
发明人： William H. Andrews
CPC分类号： C01B33/26 , C01B33/2892 , C01D5/00
摘要： A process for production of useful materials including a product of similar composition to nepheline involves contacting a slurry of red mud with sulphur dioxide to dissolve components of the red mud that are soluble in sulphurous acid, removing residual undissolved solids by filtration, and recovering a filtrate containing soda, alumina and silica values, removing free water from the filtrate to produce a crystallized residue, and calcining the crystallized residue.
摘要翻译： 用于生产包括与霞石相似成分的产品的有用材料的方法包括将红泥浆与二氧化硫接触以溶解可溶于亚硫酸的红泥组分，通过过滤除去残余的未溶解固体，并回收滤液 含有苏打，氧化铝和二氧化硅值，从滤液中除去游离水以产生结晶残余物，并煅烧结晶残余物。
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公开(公告)号：US4504546A
公开(公告)日：1985-03-12
申请号：US429133
申请日：1982-09-30
申请人： Stephen I. Sallay
发明人： Stephen I. Sallay
CPC分类号： C09K21/12 , C01B35/1063 , C01D5/00 , C05B7/00 , Y10S428/921 , Y10T428/2933 , Y10T428/2965 , Y10T428/2967 , Y10T428/2969
摘要： Combustible materials such as fiber is made flame retardant by treating the material with a methanol or water solution containing the newly discovered compound ammoniumtriborate (NH.sub.4.B.sub.3 O.sub.5.3CH.sub.3 --OH) or a methanolic solution of newly discovered methylborate ammonia adduct. These new flame retardants have the ability to penetrate the combustible material when applied as a solution and thereafter be converted in situ to ammoniumpentaborate to result in enhanced flame retardation over that achieved by merely the direct treatment with ammoniumpentaborate with other borate flame retardants.
摘要翻译： 通过用含有新发现的复合硫酸铵（NH 4 B 3 O 5·3H 3 CH 3 -OH）或新发现的甲基硼酸氨加合物的甲醇溶液的甲醇或水溶液处理该材料，将可燃材料如纤维制成阻燃剂。 这些新的阻燃剂在作为溶液使用时具有穿透可燃材料的能力，此后可以将其原位转化为五硼酸铵，导致与仅通过硼酸四丁酯与其它硼酸盐阻燃剂的直接处理所达到的相比更好的阻燃性。
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85.发明授权
公开(公告)号：US4347225A
公开(公告)日：1982-08-31
申请号：US238309
申请日：1981-02-26
IPC分类号： C01D5/00
CPC分类号： C01D5/00
摘要： The present invention is a method for treating alkaline effluents resulting from petroleum processing by incinerating the effluents in the presence of oxygen and a sufficient amount of hydrogen sulfide fuel to convert the alkaline material to the corresponding sulfate.
摘要翻译： 本发明是一种通过在氧气和足够量的硫化氢燃料的存在下焚烧流出物来处理由石油加工产生的碱性流出物以将碱性物质转化为相应的硫酸盐的方法。
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公开(公告)号：US4328196A
公开(公告)日：1982-05-04
申请号：US190850
申请日：1980-09-25
CPC分类号： C01D5/00 , C01B25/301 , C01B33/186 , C01D9/00 , C01F11/22 , C01P2006/80
摘要： Alkali metal-containing salt products selected from the group consisting of alkali metal dihydrogen phosphate, alkali metal sulfate, alkali metal nitrate, and mixtures thereof, together with alkaline earth metal fluoride, are produced from alkali metal fluosilicate by the steps of:(a) reacting alkali metal fluosilicate with alkaline earth metal ion in an aqueous solution to form alkali metal hydroxide and solid alkaline earth metal fluoride with SiO.sub.2 ;(b) separating the solid alkaline earth metal fluoride and SiO.sub.2 and recovering as useful products;(c) reacting the remaining alkali metal hydroxide solution with a mineral acid selected from the group consisting of phosphoric acid, sulfuric acid, nitric acid, and mixtures thereof, at a temperature in the range of about 30.degree.-100.degree. C. until the reaction is complete; and(d) recovering the alkali metal-containing product.Also provided by this invention is a continuous system for conducting this reaction whereby mother liquors may be recycled and the acid reused in the process, and wherein mineral acid is recovered from which anhydrous HCl can be produced.
摘要翻译： 由碱金属氟硅酸盐由碱金属氟硅酸盐制备选自碱金属磷酸二氢盐，碱金属硫酸盐，碱金属硝酸盐及其混合物的碱金属盐产物，其步骤为：（a） 使碱金属氟硅酸盐与碱土金属离子在水溶液中反应，形成碱金属氢氧化物和固体碱土金属氟化物与SiO2; （b）分离固体碱土金属氟化物和SiO 2并作为有用产物回收; （c）将剩余的碱金属氢氧化物溶液与选自磷酸，硫酸，硝酸及其混合物的无机酸在约30℃-100℃的温度下反应，直到 反应完成 和（d）回收含碱金属的产物。 本发明还提供了一种用于进行该反应的连续系统，由此母液可以再循环并且酸在该方法中重复使用，并且其中回收无机酸可从其中产生无水HCl。
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公开(公告)号：US4303619A
公开(公告)日：1981-12-01
申请号：US166323
申请日：1980-07-07
申请人： Kazuo Kobayashi , Heima Hirai
发明人： Kazuo Kobayashi , Heima Hirai
摘要： An improved apparatus for producing potassium sulfate and hydrogen chloride gas from potassium hydrogen sulfate and potassium chloride is provided, which comprises a horizontal type muffle furnace having an arcuate upper wall, at least one shaft of an agitator, a means for feeding raw materials, and a means for discharging the reaction product, to discharge the product by overflow; and an outer casing for said muffle furnace in which said furnace is accomodated on a bed of an insulating material and a space over said furnace, as a passage for heating gas. A heating gas introduced into said space over said furnace supplies the heat quantity required for the total reaction, through the upper wall of the furnace to raw materials. According to this apparatus, the life of furnace for continuous operation can be prolonged.
摘要翻译： 提供了一种用于从硫酸氢钾和氯化钾生产硫酸钾和氯化氢气体的改进装置，其包括具有弧形上壁的水平式马弗炉，搅拌器的至少一个轴，用于进料原料的装置和 用于排出反应产物的装置，通过溢流排出产品; 以及用于所述马弗炉的外壳，其中所述炉容纳在绝热材料床和所述炉上的空间中，作为用于加热气体的通道。 在所述炉内引入所述空间的加热气体通过炉的上壁将总反应所需的热量提供给原料。 根据该装置，能够延长连续运转的炉的寿命。
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公开(公告)号：US4196177A
公开(公告)日：1980-04-01
申请号：US927340
申请日：1978-07-24
申请人： Stephen I. Sallay
发明人： Stephen I. Sallay
CPC分类号： C09K21/12 , C01B35/1063 , C01D5/00 , C05B7/00
摘要： High purity ammonium pentaborate or boric acid is produced from alkali metal and alkaline earth metal borate ores by a relatively non-corrosive technology requiring low energy, without polluting the environment, by treating finely ground borate ores with ammonia and sulphur dioxide or ammonium sulphite in the presence of methanol. Useful by-products, such as sulphites, or fertilizers, such as ammonium phosphates, can be obtained. If the ore is rendered anhydrous prior to treatment, there is produced methylborate-ammonia adduct which upon hydrolysis is transformed into ammonium pentaborate and boric acid.
摘要翻译： 高纯度的五硼酸铵或硼酸由碱金属和碱土金属硼酸盐矿石生产，需要低能量的相对无腐蚀性的技术，而不会污染环境，通过用氨和二氧化硫或亚硫酸铵处理精细研磨的硼酸盐矿石 存在甲醇。 可以获得有用的副产物，例如亚硫酸盐或肥料，例如磷酸铵。 如果在处理之前矿石是无水的，则产生甲基硼酸 - 氨加合物，其在水解时转变为五硼酸铵和硼酸。
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89.发明授权
公开(公告)号：US4133866A
公开(公告)日：1979-01-09
申请号：US846588
申请日：1977-10-28
申请人： Tamas Lakatos , Mihaly Miskei , Janos Szolnoki , Ferenc Toth , Laszlo Revesz
发明人： Tamas Lakatos , Mihaly Miskei , Janos Szolnoki , Ferenc Toth , Laszlo Revesz
摘要： The invention relates to a novel process for the selective recovery of the sodium content of red mud originating from alumina plants. According to the process of the invention red mud or a slurry thereof is admixed with a ferric sulfate solution, the resulting suspension is stirred intensively for 0.5 to 1 hour at 15 to 85.degree. C, thereafter, if necessary, the pH of the suspension is adjusted to 4.4 to 4.6 and the solid substance is removed from the suspension.Using the process of the invention the sodium oxide content of red mud can be reduced to below 1.5%.
摘要翻译： 本发明涉及一种用于选择性回收源自氧化铝工厂的红泥的钠含量的新方法。 根据本发明的方法，将红泥或其浆料与硫酸铁溶液混合，将所得悬浮液在15至85℃下剧烈搅拌0.5至1小时，此后，如果需要，悬浮液的pH为 调节至4.4至4.6，并将固体物质从悬浮液中除去。
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90.发明授权
公开(公告)号：US3953307A
公开(公告)日：1976-04-27
申请号：US493432
申请日：1974-07-31
CPC分类号： C01D5/00 , D06P1/22 , D06P5/2016
摘要： A process for compensating for reduction in the reducing effect caused by atmospheric oxygen or dissolved oxygen in an aqueous reducingsolution of sodium hydrosulphite employed in a vat dye reduction process wherein the vat dye is reduced and fixed on textile materials by the reducing action of the aqueous alkaline reducing solution, which process comprises generating hydrogen in said reducing solution, which hydrogen combines with the dissociation products of the sodium hydrosulphite to form a powerful reducing species with relatively high redox potential, by carrying out electrolysis of the aqueous alkaline solution.
摘要翻译： 一种用于补偿在还原染料还原过程中使用的亚硫酸氢钠水溶液中的由大气氧或溶解氧引起的还原效果降低的方法，其中，通过碱水溶液的还原作用还原并固定在纺织品上 该方法包括在所述还原溶液中产生氢，该氢与氢亚硫酸氢钠的解离产物结合，通过进行碱性水溶液的电解，形成具有较高氧化还原电位的强大还原物质。
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