公开(公告)号：US4002727A

公开(公告)日：1977-01-11

申请号：US532856

申请日：1974-12-16

申请人： Takezo Sonoda ,  Masao Nakano ,  Michito Okane ,  Hideo Suzuki

发明人： Takezo Sonoda ,  Masao Nakano ,  Michito Okane ,  Hideo Suzuki

IPC分类号： C01B17/05 ,  B01D53/14 ,  B01D53/52 ,  C01B17/04

CPC分类号： B01D53/1493 ,  B01D53/52 ,  C01B17/05

摘要： In a process for desulfurizing hydrogen sulfide-containing gases by contacting a hydrogen sulfide-containing gas with an alkaline aqueous solution containing a naphthoquinonesulfonate to effect absorption of hydrogen sulfide by said aqueous solution and subjecting the effluent to catalytic oxidation by a molecular oxygen-containing gas to separate out sulfur, an improvement which comprises (a) carrying out the absorption of hydrogen sulfide by using a liquid absorbent having a pH value adjusted by means of ammonia to 8 to 10 and containing as catalyst components a naphthoquinonesulfonate and a variable valent metal compound, (b) carrying out the catalytic oxidation of the effluent containing absorbed therein hydrogen sulfide by means of a molecular oxygen-containing gas as to lower the concentration of hydrosulfide ion in the effluent to 70 ppm or less and (c) recirculating the said liquid absorbent or effluent to the contact with the said hydrogen sulfide-containing gas.

摘要翻译： 在含硫化氢的气体与含有萘醌磺酸盐的碱性水溶液接触以使所述水溶液吸收硫化氢并通过含分子氧的气体进行催化氧化的硫化氢气体脱硫方法中， 为了分离硫，其改进包括（a）通过使用具有通过氨调节的pH值的液体吸收剂进行8至10并且含有作为催化剂组分的萘醌磺酸盐和可变价金属化合物进行硫化氢吸收 ，（b）通过含分子氧的气体进行催化氧化含有硫化氢的流出物，以将流出液中的氢硫化物离子的浓度降低至70ppm或更低，和（c）使所述液体再循环 吸收剂或流出物与与所述含硫化氢的气体接触。

公开(公告)号：US4317926A

公开(公告)日：1982-03-02

申请号：US3405

申请日：1979-01-15

申请人： Takahisa Sato ,  Masao Baba ,  Michito Okane

发明人： Takahisa Sato ,  Masao Baba ,  Michito Okane

IPC分类号： C07C51/347 ,  C07C57/07 ,  C07C57/075 ,  C07C51/25 ,  C07C51/50 ,  C07C57/05 ,  C07C57/055

CPC分类号： C07C51/347 ,  Y10S203/22

摘要： In a process for producing acrylic acid which comprises contacting with water an acrylic acid-containing reaction product gas which has been obtained by the catalytic vapor phase oxidation of an olefinic compound of a general formula, CH.sub.2 .dbd.CHX, wherein X represents at least one group selected from the group consisting of CH.sub.3 and CHO, with a molecular oxygen-containing gas thereby collecting the acrylic acid in the form of an aqueous solution, separating the acrylic acid from the aqueous solution, and refining the thus separated acrylic acid, the improvement comprising a step of subjecting the bottom liquor of a rectification tower for acrylic acid to a decomposition evaporation and a step of subjecting the evaporation residue having a composition of 1-25 wt % of acrylic acid, 9-49 wt % of acrylic acid dimer, wherein total amount of the acrylic acid and its dimer is in the range of 10-50 wt %, and correspondingly 90-50 wt % of other matters to an extraction with water to separate the acrylic acid, its dimer and hydroquinone by the extraction.

摘要翻译： 在制备丙烯酸的方法中，其包括与通过催化气相氧化通式CH 2 = CHX的烯属化合物获得的含丙烯酸的反应产物气体与水接触，其中X表示至少一个基团 从CH3和CHO组成的组中选择含有分子氧的气体，由此收集水溶液形式的丙烯酸，从水溶液中分离出丙烯酸，并精制这样分离的丙烯酸，其改进包括 将精馏塔的底液进行丙烯酸分解蒸发的步骤和使具有1-25重量％丙烯酸的组合物的蒸发残余物，9-49重量％的丙烯酸二聚体的步骤，其中 丙烯酸及其二聚体的总量在10-50重量％的范围内，相应地90-50重量％的其它物质用水萃取以分离出acr 通过提取其二聚体和氢醌。