• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Methanol is allowed to flow downwardly and contacted countercurrently with an unsaturated aldehyde-containing gas obtained from gas phase catalytic oxidation of the starting gas containing at least one gas selected from the group consisting of propylene, isobutylene and t-butanol, said methanol being supplied in such an amount that substantially the whole thereof can be gasified in the treatment. According to this method, the water content in said unsaturated aldehyde-containing gas can be rendered smaller than that in the azeotropic mixture of the unsaturated aldehyde and water, and also there takes place no polymerization of the unsaturated aldehyde.
    公开号:SU1442065A3
    申请号:SU803217952
    申请日:1980-12-17
    公开日:1988-11-30
    发明作者:Аосима Атсуси；Митсуи Уоичи；Канеко Тосиаки
    申请人:Асахи Касеи Когио Кабусики Кайся (Фирма)；
    IPC主号:
    专利说明:

    WITH
    four
    4 to
    about a
    SP
     cm
    This invention relates to processes for drying a hydrocarbon gas by contacting liquid with absorbents.
    The purpose of the invention is to provide an effective drying in the presence of metacrolein in the feed gas „
    Example 1, the composition of the source gas, mol.%: Methacrolein 4j2; water 28.4; by-products, ketones, such as acetone and, 0.3; other substances, including nitrogen, oxygen, carbon dioxide, carbon monoxide, unreacted isobutylene, and the like. 67.1.
    This gas is fed to the tower for dehydration from below with a flow rate of 3.5 nm / h, and from the top to the tower serves methanol containing 0.01 wt.% Hydroquinone at a rate of 1400 g / h and a flow rate of 400 g per 1 m of gas. The gas temperature at the bottom of the tower, and at the top is 30 ° C. The dehydrated gas removed through the top of the tower is absorbed by methanol in the absorption tower. The absorption solution has the following composition, wt%: netanol, methacrolein 16; by-products, ketones, for example acetone 0.2; water 0.3.
    EXAMPLE 2 The composition of the gas removed from the outlet of the cooling tower is the following, mol%: methacrolein 5.6; water 5,5 j by-products, ketones, such as acetone
    0.3; nitrogen, oxygen, etc. 89.6. The resulting gas is fed at a flow rate of 3.5 nm / h to the tower for dehydration from the bottom, and methanol containing 0.01 wt.% Hydroquinone is at the top at a flow rate of 110 g / h with a flow rate of 30 g per 1 m of gas. The gas removed from the top of the tower is absorbed in the absorption tower, the absorbing liquid having the following composition, wt%: methacrolein 26.3; methanol 72.7; by-products, ketones, for example acetone 0.3; water 0.7.
    The data for examples t-8 are tabulated.
    When performing purification according to the prototype method, an azeotropic mixture of water and methacrolein is formed and the drying of gas from water is impossible.
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    A method of drying a hydrocarbon gas, including its absorption by methanol, characterized in that, in order to ensure effective drying in the presence of acrolein or methacrolein in the source gas, the gas is precontacted with methanol at a temperature of 15-80 s and consumption of methanol is 30-400 g per 1 m gas, and the resulting gas containing acrolein or methacrolein, is subjected to absorption.
    类似技术:
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    同族专利:
    公开号 | 公开日
    JPS6212776B2|1987-03-20|
    GB2065650A|1981-07-01|
    US4329513A|1982-05-11|
    DE3047485A1|1981-09-24|
    IT1151467B|1986-12-17|
    FR2471964A1|1981-06-26|
    JPS5687530A|1981-07-16|
    IT8026798D0|1980-12-19|
    GB2065650B|1983-12-21|
    FR2471964B1|1983-01-28|
    DE3047485C2|1983-05-26|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2514966A|1948-01-09|1950-07-11|Shell Dev|Refining and concentrating crude unsaturated aldehydes by extractive distillation|
    US2514967A|1948-09-17|1950-07-11|Shell Dev|Refining and concentrating crude unsaturated aldehydes|
    US2767216A|1955-10-31|1956-10-16|Shell Dev|Drying of acrolein by extractive separation with glycerol|
    JPS4823409B1|1970-03-04|1973-07-13|
    JPS547768B2|1973-01-06|1979-04-10|US5276178A|1989-12-06|1994-01-04|Nippon Shokubai Co., Ltd.|Process for producing methacrolein and methacrylic acid|
    SG71815A1|1997-07-08|2000-04-18|Asahi Chemical Ind|Method of producing methyl methacrylate|
    TW201509901A|2013-07-29|2015-03-16|Rohm & Haas|Oxidative esterification process|
    TW201509522A|2013-07-29|2015-03-16|Rohm & Haas|Oxidative esterification catalyst|
    EP3212606B1|2014-10-31|2019-11-20|Dow Global Technologies Llc|Process for in situ water removal from an oxidative esterification reaction using a coupled reactor-distillation system|
    MX2017004880A|2014-10-31|2017-07-05|Rohm & Haas|Oxidative esterification process for making methyl methacrylate.|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP54164098A|JPS6212776B2|1979-12-19|1979-12-19|
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