久久99精品国产99久久6尤,国产成人精品综合网站,18国产精品白浆在线观看免费,久久成人无码视频,日本欧美不卡一区二区三区在线,欧美又黄又粗又爽免费看,欧美视频一区二区,免费人妻精品一区二区三区四区,狠狠色狠狠色综合网,97色伦图片7778久久

  • <strike id="i6ace"><input id="i6ace"></input></strike><fieldset id="i6ace"></fieldset>
  • <ul id="i6ace"><dfn id="i6ace"></dfn></ul>
  • <del id="i6ace"><dfn id="i6ace"></dfn></del>

     

    Ethylamine

    Update time:2021/11/03 09:55:11  ???View:  
    Monoethylamine, also known as ethylamine, aminoethane, ethaneamine. Colorless liquid, flammable, volatile and ammonia odor. It can be arbitrarily miscible with water, alcohol and ether, used to make dyes, rubber accelerators, surfactants, and also used to make pesticides simazine and atrazine.
    Physical and chemical properties
    A colorless, highly volatile liquid with the smell of ammonia and alkaline.
    Melting point -81℃, boiling point 16.6℃, relative density 0.6828 (20/20℃), flash point -52℃, spontaneous ignition point 290.83℃, critical temperature 183.2℃, critical pressure 5.45MPa, refractive index 1.3663.
    It is miscible with water, ethanol and ether.
    It has the toxicity of general amine compounds, and the flammability limit in the air is 3.5%-14%.
    Preparation method
    (1) Ethanol (gas phase) ammoniating method: feed ethanol and ammonia in a ratio of 4:1, at a reaction temperature of 350-400℃, pressure of 2.45-2.94MPa, and alumina as a dehydration catalyst. In addition to the formation of ethylamine, side reactions generate diethylamine, triethylamine, ether, acetonitrile and ethylene. The crude product obtained by condensing the reaction gas is distilled by ammonia to distill ethylamine with a content of more than 95%. Generally, 50% aqueous solution is used as a commercial product, and each ton of 50% aqueous solution consumes about 1400 kg of ethanol (95%).
    (2) Acetaldehyde and hydrogen ammoniating method: using acetaldehyde, hydrogen and ammonia as raw materials, nickel as a catalyst for reaction to produce ethylamine. First, a structured catalyst with nickel as the main catalyst, reduced copper, reduced chromium as a promoter and kaolin as a carrier is loaded into the reactor, and acetaldehyde is introduced at a space velocity of 0.03-0.15L·h-1 and the hydrogen is combined with the acetaldehyde. The ratio is 5:1, and the ratio of ammonia and acetaldehyde is 0.4-3:1. The raw material is gasified and enters the reactor at 80°C. The reaction temperature is controlled between 105-200°C. The product is cooled at -5°C and separated to obtain mono-, di-, and triethylamine. Since monoethylamine is formed faster than diethylamine and triethylamine, it is easier to obtain a large amount of ethylamine. When the main product is required to be diethylamine or triethylamine, the generated monoethylamine needs to be recycled to the reaction system for reaction.
    Use
    Used in the production of pesticide triazine herbicides, including atrazine and simazine.
    It is also used in the production of dyes, rubber accelerators, surfactants, antioxidants, ion exchange resins, aircraft fuels, solvents, detergents, lubricants, metallurgical beneficiaries, and cosmetics and pharmaceuticals.
    Toxicity and safety
    When this product is burned, the substance decomposes to produce toxic gas containing oxynitride. The dermal LD of hare is 500.39ml/kg, and the oral LD of mouse is 400mg/kg. The aqueous solution is strongly alkaline, reacts fiercely with acid and is corrosive, reacts fiercely with strong oxides and organic matter, and causes fire and explosion hazards, and corrodes many non-ferrous metals and plastics.
    Packaging, storage and transportation
    Storage instructions: barrels and containers containing monoethylamine must be made of iron or steel plates. Avoid co-exposure with oxidants and acids, keep away from heat, sparks, and open flames. Keep the place ventilated, cool, and prevent sun and rain.
    Packing: Packed in iron drums, each with a net weight of 150 kg.
    ------分隔線----------------------------

    Service Hotline:

    You only need a phone call, we will serve you attentively

    Consult now
    Copyright © Shandong Zhengji Chemical Co., Ltd.  All Rights Reserved   Case Number :魯ICP備20007847號-4 chemBlink Premium Supplier
    黄色福利AV网址国产| AV无码动漫一区二区三区精品| 国产精品高清网站| 亚洲AV无码一区二区三区在线 | 国产精品va在线播放我和闺蜜| 国产精品极品美女自在线观看免费| 国产成人无码免费视频在线| 日韩成人无码一区二区三区| 久久精品全国免费观看国产| 中文字幕日本一区| 亚洲h在线播放在线观看h| 97精品久久久久中文字幕| 亚洲gv白嫩小受在线观看| 国产av无码精品色午夜| 99久久精品无码一区二区三区 | 亚洲av日韩综合一区二区三区| 中文字幕网伦射乱中文| 亚洲AV永久青草无码精品| 老肥熟妇丰满大屁股在线播放| 99精品欧美一区二区三区| 欧美交换配乱吟粗大| 女女百合av免费在线观看| 欧美日韩综合精品一区二区三区 | 国产亚洲一本大道中文在线 | 99久久亚洲精品无码| 国产日韩欧美自拍| 被灌满精子的波多野结衣| 天堂√中文最新版在线| 伴郎粗大的内捧猛烈进出视频观看| 无码人妻一区二区三区免费视频| japanese国产在线观看| 日日噜狠狠噜天天噜av| 中国老太婆grdnnytube| 青青草无码免费一二三区| 亚洲色欲色欲www在线观看| 国产在线无码一区二区三区| 国产在线精品一区在线观看| 奶头好大揉着好爽视频| 亚洲国产中文在线二区三区免| 国产69精品久久久久久妇女迅雷| 亚洲国产精品久久久久制服|