Method for preparing chlorohydrins and method for preparing epichlorohydrin using chlorohydrins prepared thereby

一种氯醇、氯化剂的技术，应用在制备表氯醇,的情况下反,进行的一个脱水步骤领域，能够解决氯醇选择性降低、反应速率降低、丙烯供应和需求不稳定等问题，达到选择性改良的效果

Inactive Publication Date: 2013-04-10
LOTTE FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of producing chlorohydrins using propylene has several problems: unstable supply and demand of propylene caused by rising propylene price, generation of large amounts of wastewater and other waste materials, excessive initial investment cost caused by this two-step manufacturing process, and Difficulty resulting from new construction / modification of manufacturing equipment
Therefore, as the reaction proceeds, the reaction rate gradually decreases, and the selectivity of chlorohydrins decreases

Method used

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  • Method for preparing chlorohydrins and method for preparing epichlorohydrin using chlorohydrins prepared thereby
  • Method for preparing chlorohydrins and method for preparing epichlorohydrin using chlorohydrins prepared thereby
  • Method for preparing chlorohydrins and method for preparing epichlorohydrin using chlorohydrins prepared thereby

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Experimental program
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preparation example Construction

[0045] The method for preparing chlorohydrins according to an embodiment of the present invention includes reacting a polyhydroxy aliphatic hydrocarbon with a chlorination agent in the presence of a catalyst.

[0046] The process for preparing chlorohydrins comprises at least one combination of a series of unit operations comprising a plurality of reaction steps and a dehydration step in the order set forth below: a first reaction of reacting a polyhydroxy aliphatic hydrocarbon with a chlorinating agent steps; a dehydration step for removing water as a by-product from the reaction mixture discharged from the first reaction step; The second reaction step of at least one reaction. Furthermore, in the dehydration step, no chlorinating agent was additionally added.

[0047] Furthermore, the method for producing chlorohydrins may additionally comprise purifying the reaction mixture discharged from the last reaction step among the plurality of reaction steps to obtain a concentrate...

example

[0118] (Preparation of Chlorohydrins and Epichlorohydrins from Glycerol and Hydrogen Chloride Gas in the Presence of Acetic Acid as a Catalyst)

[0119] use as figure 1 The manufacturing process depicted in , prepares chlorohydrins and epichlorohydrins by reacting glycerol with hydrogen chloride gas in the presence of acetic acid as a catalyst. The description and operating conditions of the equipment used in the fabrication process are listed in Table 1 below.

[0120]

[0121]

[0122]

[0123] In addition, the total flow rate of all substances transferred through each pipeline in the manufacturing process, the components of each substance and the flow rate of each component were measured and shown in Table 2 below. The flow rate of each component was calculated by measuring the total flow rate of all substances transferred through each line, analyzing the composition ratio of the substances collected from each line by gas chromatography, and multiplying the total f...

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Abstract

Disclosed are a method for preparing chlorohydrins and a method for preparing epichlorohydrin using chlorohydrins prepared thereby. The disclosed method for preparing chlorohydrins reacts polyhydroxy aliphatic hydrocarbon with a chlorination agent in the presence of a catalyst, comprises at least one combination of a series of unit operations including a first reaction step, a water removal step, and a second reaction step, in the respective order, and additionally includes a step for refining cholorihydrins from a reaction mixture discharged from the final reaction step of the plurality of reaction steps. The disclosed method for preparing epichlorohydrin includes a step for reacting the chlorohydrins, which was prepared using the method for preparing chlorohydrins, with an alkaline chemical.

Description

technical field [0001] One or more embodiments of the present invention relate to a method of preparing chlorohydrins and a method of preparing epichlorohydrin from chlorohydrins prepared using the method. More specifically, one or more embodiments of the present invention relate to a process for the preparation of chlorohydrins by reacting a polyhydroxy aliphatic hydrocarbon with a chlorinating agent in the presence of a catalyst, the process comprising a plurality of reaction steps and A dehydration step carried out between the plurality of reaction steps, wherein the method additionally comprises purifying chlorohydrins from the reaction mixture discharged from the last reaction step in the plurality of reaction steps; A method for chlorohydrins, the method comprising reacting chlorohydrins prepared by the method with an alkaline reagent. Background technique [0002] Recently, the world has been racing to develop and produce bio-diesels, and these bio-diesels have also ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/62C07C29/80C07C31/34C07D303/08
CPCC07D303/08C07C29/62C07C31/36C07C29/64C07C29/80C07C31/34
Inventor 宋沅燮禹成律宋富源朴成汉权明淑
Owner LOTTE FINE CHEM CO LTD
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