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    Process for the purification of sulfuric acid by-product from boron trifluoride synthesis
    51.
    发明授权
    Process for the purification of sulfuric acid by-product from boron trifluoride synthesis 失效
    从三氟化硼合成中纯化硫酸副产物的方法

    公开(公告)号：US4520006A

    公开(公告)日：1985-05-28

    申请号：US552480

    申请日：1983-11-17

    申请人： Charles Laviron ,  Henri Lecouls ,  Louis Mesaros

    发明人： Charles Laviron ,  Henri Lecouls ,  Louis Mesaros

    IPC分类号： C01B17/90

    CPC分类号： C01B17/90

    摘要： A process for the purification of by-product sulfuric acid resulting from the synthesis of boron trifluoride, wherein the ratio of fluorine to boron is three or more, which process comprises entraining the by-product acid in an inert gas, the process being characterized in that before entrainment the anhydrous sulfuric acid is diluted with water in a proportion of from about one to about ten percent by weight of water with respect to the acid to be treated, the temperature being maintained above 90.degree. C., the sulfuric acid obtained containing less than 0.003% fluorine and less than 0.005% boron, so that the quality is substantially equivalent to a sulfuric acid directly obtained by the oxidation of sulfur.

    摘要翻译： 用于纯化由合成三氟化硼产生的副产物硫酸的方法，其中氟与硼的比例为三或更多，该方法包括将惰性气体中的副产物酸夹带，该方法的特征在于 在夹带之前，无水硫酸用水以相对于待处理的酸的约1至约10重量％的比例稀释，温度保持在90℃以上，所得硫酸 小于0.003％的氟和小于0.005％的硼，使得其质量基本上等于通过硫的氧化直接获得的硫酸。

    Purification of sulfuric acid containing acetic acid
    55.
    发明授权
    Purification of sulfuric acid containing acetic acid 失效
    纯化含硫酸的乙酸

    公开(公告)号：US4045295A

    公开(公告)日：1977-08-30

    申请号：US694664

    申请日：1976-06-10

    申请人： Stefan Schafer ,  Alexander Ohorodnik ,  Klaus Gehrmann ,  Albert Mainski

    发明人： Stefan Schafer ,  Alexander Ohorodnik ,  Klaus Gehrmann ,  Albert Mainski

    IPC分类号： C01B17/90 ,  C07C51/00 ,  C07C51/44 ,  C07C53/08 ,  C07C67/00 ,  B01D3/10 ,  B01D3/34

    CPC分类号： C01B17/90 ,  C07C51/44

    摘要： Dilute sulfuric acid contaminated with acetic acid and hydrogen chloride is purified with the resultant formation of concentrated sulfuric acid and acetic acid. To this end, the contaminated sulfuric acid is heated in a first step to at most 60.degree. C under 25-30 mm Hg so as to expel all of the hydrogen chloride together with minor proportions of acetic acid and water. In a second step, the sulfuric acid is heated to at most 165.degree. C under 20-25 mm Hg so as to distil off the bulk of acetic acid together with water. In a third step, the sulfuric acid is cooled down to 60.degree.-90.degree. C, diluted with 10-30 wieght % of water with agitation and while cooling is continued. Following this, the sulfuric acid is heated to 160.degree.-165.degree. C under 20-25 mm Hg and thereby freed from the water and residual acetic acid.

    摘要翻译： 用乙酸和氯化氢污染的稀硫酸被纯化，形成浓硫酸和乙酸。 为此，将污染的硫酸在25-30mmHg的第一步骤加热至至多60℃，以便将所有氯化氢与少量乙酸和水一起排出。 在第二步中，将硫酸在20-25mmHg下加热至至多165℃，以便与水一起蒸馏出大部分乙酸。 在第三步骤中，将硫酸冷却至60-90℃，用10-30W水份搅拌稀释，同时继续冷却。 然后，将硫酸在20-25mmHg下加热至160〜-165℃，从而除去水和残留的乙酸。

    Removal of odors from impure sulfuric acid
    56.
    发明授权
    Removal of odors from impure sulfuric acid 失效
    从酸性硫酸盐去除气味

    公开(公告)号：US3817738A

    公开(公告)日：1974-06-18

    申请号：US31957872

    申请日：1972-12-29

    申请人： OLIN CORP

    发明人： SPRAGUE E

    IPC分类号： C01B17/90 ,  C05B11/08 ,  B01D53/14

    CPC分类号： C01B17/90 ,  C01B17/905 ,  C05B11/08

    摘要： A METHOD FOR PRODUCING ODORLESS SULFURIC ACID FROM AN AQUEOUS SOLUTION OF IMPURE SULFURIC ACID CONTAINING ODOR CASING COMPONENTW BY THE ADDITION OF A HYDRAZINE COMPOUND. THE IMPURE SULFURIC ACID MAY BE OBTAINED FROM THE DRYING TOWERS OF AN ELECTROLYTIC CHLORINE PLANT. THE RESULTING ODORLESS ACID IS USEFUL IN THE PRODUCTION OF PHOSPHATE FERTILIZERS.

    System for the liquid-phase removal of a component from the gas stream especially the absorption of sulfur trioxide in sulfuric acid
    57.
    发明授权
    System for the liquid-phase removal of a component from the gas stream especially the absorption of sulfur trioxide in sulfuric acid 失效
    用于从气体流中液相移除组分的系统特别是在硫酸中吸收三氧化硫

    公开(公告)号：US3780499A

    公开(公告)日：1973-12-25

    申请号：US3780499D

    申请日：1971-10-12

    申请人： METALLGESELLSCHAFT AG

    发明人： DORR K ,  GRIMM H ,  KOLA R

    IPC分类号： B01D53/14 ,  C01B17/80 ,  C01B17/90

    CPC分类号： B01D53/263 ,  B01D53/14 ,  B01D53/1406 ,  C01B17/806 ,  C01B17/90

    摘要： A process for the removal of gaseous components from a gas stream by liquid-phase absorption of the component in the treatment of the gas with a liquid, especially the absorption of sulfur trioxide from a gas stream obtained by the contactcatalysis oxidation of sulfur dioxide in the production of sulfuric acid, makes use of a uniflow vertical venturi absorber followed by a turbulencing device or horizontal venturi absorber and a counterflow column absorber or tower. The absorbing liquid is sulfuric acid.

    摘要翻译： 一种通过在用液体处理气体中液体吸收组分从气流中除去气体组分的方法，特别是从通过二氧化硫的接触催化氧化获得的气流中吸收三氧化硫 在生产硫酸时，使用一个单向垂直文丘里吸收器，随后是湍流装置或水平文丘里吸收器和逆流柱吸收塔或塔。 吸收液体是硫酸。

    Process for preparing a solution containing hydroxyl ammonium phosphate
    58.
    发明授权
    Process for preparing a solution containing hydroxyl ammonium phosphate 失效
    制备含有羟基磷酸铵的溶液的方法

    公开(公告)号：US3720755A

    公开(公告)日：1973-03-13

    申请号：US3720755D

    申请日：1971-03-26

    申请人： STAMICARBON

    发明人： DUYVERMAN C ,  GORGELS M

    IPC分类号： C01B17/90 ,  C01B21/14 ,  C01B25/234 ,  C01B15/16 ,  C01B25/16 ,  C01B25/26

    CPC分类号： C01B21/1418 ,  C01B17/90 ,  C01B25/234

    摘要： A process for preparing a solution of hydroxylammonium phosphate which includes catalytic reduction of nitrate ions in an aqueous solution containing phosphoric acid using molecular hydrogen. In order to maintain the activity of the catalyst the phosphoric acid to be fed to the synthesis zone is first freed of heavy metal contaminants by contacting the phosphoric acid for a sufficient time with hydrogen and an absorbent consisting of a metal of the platinum group.

    摘要翻译： 一种制备磷酸氢氧化铵溶液的方法，其包括使用分子氢在含磷酸的水溶液中催化还原硝酸根离子。