会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 4. 发明授权
    • Recovery of methylglyoxal acetal by plural stage distillation with
intermediate phase separation
    • 通过中间相分离的多级蒸馏回收甲基乙二醛缩醛
    • US3956074A
    • 1976-05-11
    • US487235
    • 1974-07-10
    • Knut Bittler
    • Knut Bittler
    • C07C41/42C07C43/30B01D3/00B01D3/10B01D3/38
    • C07C45/00
    • A process for the recovery of methylglyoxal acetal from a reaction mixture which has been obtained in the reaction of acetone with an alcohol and a nitrosation agent or oxidizing agent in the presence of an acid catalyst followed by neutralization which comprises diluting the neutralized reaction mixture with such an amount of water that a homogeneous solution is formed, subsequent distillation in a first column in which a mixture of acetone, alcohol and solvent is removed overhead and returned direct to the synthesis and an azeotrope of methylglyoxal acetal, water and high-boilers is withdrawn as a side stream, condensation of the azeotrope thus obtained and separation of the phase rich in methylglyoxal acetal, subsequent distillation of the phase rich in methylglyoxal acetal thus obtained in a second column in which purified methylglyoxal acetal is withdrawn as a side stream and the overhead and bottoms products are returned with the feed to the first column, pure methylglyoxal acetal being obtained as the overhead product in a third column. Methylglyoxal acetal is suitable for the production of animal feed supplements.
    • 从丙酸与醇和亚硝化剂或氧化剂在酸催化剂的存在下反应获得的反应混合物中回收甲基乙二醛缩醛的方法,然后中和,其中包括用这样的中和反应混合物 一次形成均匀溶液的水,随后在第一塔中进行蒸馏,其中丙酮,醇和溶剂的混合物在塔顶馏出并直接返回合成,甲基乙二醛缩醛,水和高锅炉的共沸物被取出 作为侧流,由此获得的共沸物的冷凝和富含甲基乙二醛缩醛的相的分离,随后在第二塔中蒸馏富含甲基乙二醛缩醛的相,其中纯化的甲基乙二醛缩醛作为侧流取出,并且塔顶 并且将底部产物与第一塔的进料一起返回,即纯甲基乙二醛乙酸酯 在第三列中作为塔顶产物得到。 甲基乙二醛缩醛适用于生产动物饲料添加剂。