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Device for producing dimethyl hydantoin

A technology of dimethyl hydantoin and production equipment, applied in the direction of organic chemistry, etc., to achieve the effect of less side reactions, simple structure and reasonable design

Inactive Publication Date: 2012-02-01
大庆日升昌石化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, with the vigorous development of the fine chemical industry, the output of acetone cyanohydrin has increased and the demand for DMH has increased, but there is no device suitable for industrialized large-tonnage production

Method used

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  • Device for producing dimethyl hydantoin
  • Device for producing dimethyl hydantoin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The production device of dimethylhydantoin of the present invention is composed of a liquid storage tank, a metering tank and a reaction kettle, the liquid storage tank 1 is connected with the metering tank 3 through a pump 2, and the outlet of the metering tank 3 is connected to the crude product reaction kettle 4 Pipeline connection, the bottom outlet of the crude product reaction kettle 4 is connected to the crude product storage tank 5, the crude product storage tank 5 is connected to the mother liquor recovery tank 6, the mother liquor recovery tank 6 is connected to the concentration reaction kettle 8 through the lifting pump 7, and the concentration reaction kettle 8 The bottom outlet is connected to the top inlet pipeline of the crude product crystallization kettle 9, the bottom outlet of the crude product crystallization kettle 9 is connected to the top inlet of the decolorization and refining kettle 11 through the pump 10, and the bottom outlet of the decoloriza...

Embodiment 2

[0018] The production device of dimethylhydantoin of the present invention is composed of a liquid storage tank, a metering tank and a reaction kettle, the liquid storage tank 1 is connected with the metering tank 3 through a pump 2, and the outlet of the metering tank 3 is connected to the crude product reaction kettle 4 Pipeline connection, the bottom outlet of the crude product reaction kettle 4 is connected to the crude product storage tank 5, the crude product storage tank 5 is connected to the mother liquor recovery tank 6, the mother liquor recovery tank 6 is connected to the concentration reaction kettle 8 through the lifting pump 7, and the concentration reaction kettle 8 One outlet at the bottom is connected to the concentrated crude product storage tank 20, the other is connected to the top inlet pipeline of the crude product crystallization kettle 9, the bottom outlet of the crude product crystallization kettle 9 is connected to the crystallization concentrated crude...

Embodiment 3

[0020] The production device of dimethylhydantoin of the present invention is constituted by a liquid storage tank, a metering tank and a reaction kettle to form a batch reaction device, two liquid storage tanks 1 are connected with two metering tanks 3 via pumps 2, two The outlet of the metering tank 3 is connected to the pipelines of the four crude product reactors 4 respectively, the bottom outlets of the four crude product reactors 4 are connected to the four crude product storage tanks 5 one by one, and the four crude product storage tanks 5 are all connected to the mother liquor recovery tank 6 Connection, the mother liquor recovery tank 6 is respectively connected to the three concentration reactors 8 through the lift pump 7, and the bottom outlets of the three concentration reactors 8 are connected one by one to the three concentrated crude product storage tanks 20, and the other is connected to the two crude product crystallizers. The top inlet of the kettle 9 is conne...

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PUM

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Abstract

The invention relates to a device for producing dimethyl hydantoin. The device for producing the dimethyl hydantoin consists of a liquid storage tank, a metering tank and reaction kettles, wherein the liquid storage tank is connected with a pipeline of the metering tank through a pump; an outlet of the metering tank is connected with a crude product reaction kettle; an outlet at the bottom of thecrude product reaction kettle is connected with a mother liquid recovery groove through a crude product storage tank; the mother liquid recovery groove is connected with an inlet on the top of a crude product crystallization kettle through a lift pump and a concentration reaction kettle; the outlet at the bottom of the crude product reaction kettle is connected with an inlet on the top of a decoloring refining kettle through a pump; an outlet at the bottom of the decoloring refining kettle is connected with a refined product crystallization kettle through a pressure filter and a pump; the refined product crystallization kettle is connected with a drying machine through a centrifugal machine; ammonia inlets and ammonia outlets are arranged on the crude product reaction kettle and the concentration reaction kettle; the ammonia passes through an absorption tower and is exhausted by a draught fan through an exhaust pipe; and the crude product reaction kettle, the concentration reaction kettle, the decoloring refining kettle, the crude product crystallization kettle and the refined product crystallization kettle have clamping sleeve structures. The device for producing the dimethyl hydantoin has the advantages of reasonable design, simple structure, easiness in control, few side reactions, yield of 85 percent, capacity of recycling filtrate produced in the process, no 'three wastes', energy conservation and environmental friendliness.

Description

technical field [0001] The invention relates to a production device for dimethylhydantoin. Background technique [0002] Dimethylhydantoin, also known as dimethylhydantoin (hereinafter referred to as DMH). [0003] DMH is an important and widely used intermediate in organic synthesis, and it is a heterocyclic compound with a certain rigid skeleton. A series of valuable derivatives can be prepared by substitution reactions. Such as: dibromohydantoin, dichlorohydantoin, etc. are widely used in organic synthesis, medicine, plastics, food, cosmetics, pesticides and other production fields. [0004] DMH has been produced industrially abroad in the 1970s, and the United States, Britain and Switzerland have all built production facilities with an annual output of thousands of tons. Japan also has production, but the scale is only 600 tons per year. [0005] Our country only started research in this area in the early 1990s, and realized industrialized production, which is mainly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D233/74
Inventor 李维学宋庆广宋庆新
Owner 大庆日升昌石化科技有限公司