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Method for producing dichloropropanol and epichlorohydrin with glycerol as raw material

A technology of dichloropropanol and a manufacturing method, applied in the directions of introducing halogen preparation, organic chemistry, etc., can solve problems such as difficulty in catalyst recycling, increase manufacturing cost, etc., and achieve the effects of improving reaction conversion rate and reducing manufacturing cost

Active Publication Date: 2019-04-23
王圣洁 +2
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Problems solved by technology

[0004] However, when using this method to prepare dichloropropanol, an azeotrope (azeotrope) of dichloropropanol and water will be formed. If an extractant (extractant) is added to separate the azeotrope to obtain dichloropropanol, it will increase the production efficiency. cost, and the extractant may also form an azeotrope with the catalyst, causing difficulties in the recycling of the catalyst

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  • Method for producing dichloropropanol and epichlorohydrin with glycerol as raw material
  • Method for producing dichloropropanol and epichlorohydrin with glycerol as raw material
  • Method for producing dichloropropanol and epichlorohydrin with glycerol as raw material

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Embodiment Construction

[0044] figure 1 It is a flow chart of the production of dichloropropanol according to the first embodiment of the present invention. figure 2 It is a schematic diagram of the production device of dichloropropanol according to the first embodiment of the present invention.

[0045] Please also refer to figure 1 and figure 2 , the manufacture method of the dichloropropanol of the present embodiment comprises the following steps. Firstly, step S100 is carried out. In at least one reactor 100, glycerol and hydrogen chloride aqueous solution are reacted in the presence of a catalyst to produce an initial product. Reactor 100 includes a continuous reactor or a batch reactor. In this embodiment, one reactor 100 is taken as an example for illustration, but the present invention is not limited thereto, and those skilled in the art can adjust the number of reactors 100 according to the process design. Glycerol is used, for example, as a by-product of biodiesel production or chemi...

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Abstract

The invention provides a method for manufacturing dichlorohydrin and a method for manufacturing epichlorohydrin by using glycerol as a raw material. The method for manufacturing dichlorohydrin comprises the following steps: in at least one reactor, reacting glycerol with a hydrogen chloride aqueous solution in the presence of a catalyst to generate an initial product; making the initial product which is taken as a first feedstock enter a first distillation column containing a first phase separator and a first side flow to generate a first tower top product, a first side flow product and a first tower bottom product; condensing the first tower top product and making the condensed tower top product enter the first phase separator, and forming a first aqueous phase product and a first organic phase product in the first phase separator. The first organic phase product contains dichlorohydrin and is taken out. The method for manufacturing dichlorohydrin and the method for manufacturing epichlorohydrin allow the manufacture cost to be reduced.

Description

technical field [0001] The present invention relates to a method for producing dichloropropanol, and in particular relates to a method for producing dichloropropanol and epichlorohydrin by using glycerin as a raw material. Background technique [0002] At present, the main preparation method of dichloropropanol is the high-temperature chlorination of propene, which includes two steps: chlorinating propylene at high temperature to generate allyl chloride, and using excessive industrial water , to react allyl chloride with a chlorinating agent to form dichloropropanol. However, the use of high-temperature chlorination of propylene generates a large amount of wastewater and other wastes, thus posing technical and environmental problems. [0003] Therefore, a method of directly reacting glycerol and a chlorinating agent to produce dichloropropanol under the condition of a catalyst has been developed. This method will not produce a large amount of waste water and waste, so it is...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C29/62C07C31/36C07D303/08C07D301/26
CPCC07C29/62C07D301/26C07D303/08C07C31/36
Inventor 王圣洁汪上晓郑西显黄筱涵
Owner 王圣洁
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