中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

21 records (took 0.031 seconds)

    Method of purifying raw melt of at least one monomer by crystallization
    1.
    发明专利
    Method of purifying raw melt of at least one monomer by crystallization 审中-公开
    通过结晶纯化一个单体的原始熔体的方法

    公开(公告)号：JP2010132711A

    公开(公告)日：2010-06-17

    申请号：JP2010056941

    申请日：2010-03-15

    Applicant: Basf Se ,  ビーエーエスエフ ソシエタス・ヨーロピアBasf Se

    Inventor： HAMMON ULRICH DR ,  ECK BERND ,  BAUMANN DIETER ,  HEILEK JOERG ,  MULLER-ENGEL KLAUS JOACHIM

    IPC: C07C51/47 ,  C07C51/43 ,  C07C57/04 ,  C07C57/07 ,  C07D207/26 ,  C07D207/267

    CPC classification number: C07D207/267 ,  C07C51/43 ,  C07C57/04

    Abstract: PROBLEM TO BE SOLVED: To improve a method of purifying a raw melt of at least one monomer by crystallization.
    SOLUTION: There is provided the method for the purification of a crude melt of at least one monomer by crystallization, in which the crude melt to be purified is subjected to a suspension crystallization, the monomer crystals produced during the suspension crystallization and suspended in the residual melt are separated from the residual melt by using a first mechanical separation operation and, in at least one further crystallization stage, the residual melt remaining after the first mechanical separation operation and/or the monomer crystals which have been separated off and if necessary washed are further purified after they have been melted, wherein the residual melt and/or the remelted monomer crystals are subjected to at least one further mechanical solid/liquid separation operation on their way into the one or more further crystallization stages.
    COPYRIGHT: (C)2010,JPO&INPIT

    Abstract translation: 要解决的问题：改进通过结晶纯化至少一种单体的原料熔体的方法。 提供了通过结晶纯化至少一种单体的粗熔体的方法，其中待纯化的粗熔体经历悬浮结晶，在悬浮液结晶期间产生的单体晶体悬浮 通过使用第一机械分离操作将剩余熔体与残余熔体分离，并且在至少一个另外的结晶阶段中，在第一机械分离操作之后残留的残余熔体和/或分离的单体晶体和如果 必要的洗涤物在熔化之后进一步纯化，其中残余熔体和/或重熔单体晶体在进入一个或多个另外的结晶阶段的过程中进行至少一个进一步的机械固/液分离操作。 版权所有（C）2010，JPO＆INPIT

    2.
    发明专利
    未知

    公开(公告)号：AT452123T

    公开(公告)日：2010-01-15

    申请号：AT01960244

    申请日：2001-05-25

    Applicant: BASF SE

    Inventor： ECK BERND ,  HEILEK JOERG ,  SCHMIDT-RADDE MARTIN ,  HELFERT HERBERT

    IPC: C07D207/267 ,  C07D201/16 ,  C07D207/26

    Abstract: The invention describes a process for the isolation of pure N-vinylpyrrolidone from N-vinylpyrrolidone-containing crude products, comprising a single-stage or multistage crystallization process, which comprises passing the mother liquor from the first crystallization stage either to a distillative and/or extractive purification, or returning it to an N-vinylpyrrolidone-containing product stream of the preparation process.

Patent Agency Ranking