Preparation method of acrylamide crystals using acrylamide crystal continuous concentration device

A technology of acrylamide crystals and acrylamide, which is applied in sustainable manufacturing/processing, carboxylic acid amide separation/purification, organic chemistry, etc., can solve the problems of bulky concentration tower, long production cycle, energy-consuming waste water, etc., and achieve effective It is conducive to the large-scale equipment, the improvement of product quality, and the effect of reducing comprehensive energy consumption

Inactive Publication Date: 2014-10-08
NINGBO XIANAN CHEM
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  • Abstract
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  • Claims
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Problems solved by technology

The production of existing acrylamide crystals must first complete the initial concentration in the concentration tower, so there are problems: first, the concentration tower needs to be continuously replenished with steam, which consumes high energy and costs a lot; second, the concentration tower is bulky and occupies a lot of space. Large space; thirdly, water resources cannot be recycled reasonably and effectively, and the waste is serious; finally, the process is complicated and the production cycle is long
There is also a patent document for the preparation of acrylamide crystals that uses a scraper evaporator to complete the preliminary concentration. See the Chinese invention patent application publication "Method for Producing Acrylamide Crystals" (publication number CN1844086A) with application number 200610043896.7. This application also exists , the shortcomings of energy-consuming wastewater, need to improve and develop new technical solutions

Method used

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  • Preparation method of acrylamide crystals using acrylamide crystal continuous concentration device

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Embodiment Construction

[0034] The present invention will be further described in detail below with reference to the embodiments of the accompanying drawings.

[0035] like figure 1 As shown, the acrylamide crystal continuous concentration device in this embodiment includes a feed tank 1, a film evaporator 2, a first condenser 3, a second condenser 4, a water ring vacuum pump 5, a first liquid storage tank 6 and The second liquid storage tank 7 .

[0036] The feed tank 1 is connected to the feed port of the film evaporator 2 through the metering pump 8. The film evaporator 2 has a feed port 21, a hot water inlet 22, an air inlet 23, a gas phase outlet 24 and a liquid phase outlet 25. The air inlet 23 of the type evaporator is provided with an air filter 9; the first condenser 3 is connected with the liquid phase outlet 25 and the gas phase outlet 24 of the film evaporator, and has a gas phase outlet 31, a first chilled water inlet 32 ​​and a first chilled water inlet 32. A chilled water outlet 33; ...

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Abstract

The invention discloses an acrylamide crystal continuous concentration device which is characterized by comprising a feed tank, a membrane type evaporator, a first condenser, a second condenser, a water ring vacuum pump, a first liquid storage tank and a second liquid storage tank, wherein the first liquid storage tank is connected with a liquid outlet of the first condenser; and the second liquid storage tank is connected with a liquid outlet of the second condenser. The invention also discloses a preparation method of an acrylamide crystal. Compared with the prior art, the device and method disclosed by the invention have the advantages of high efficiency, low energy consumption and stable operation.

Description

technical field [0001] The present invention relates to a preparation device of acrylamide crystal, and the present invention also relates to a preparation method of acrylamide crystal. Background technique [0002] Acrylamide is an important organic chemical raw material with a wide range of uses. There are more than 100 kinds of products synthesized by using it as a unit, among which it is mainly used for the production of polyacrylamide. Polyacrylamide is widely used in various fields such as oil exploration, paper industry, beneficiation, coal washing, metallurgy, water treatment, sugar production, building materials, fabric treatment and chemical industry as a flocculant, thickener, enhancer, etc. Due to the increasingly prominent market potential of polyacrylamide in the above fields, especially the gradual rise of the environmental protection industry, there will be greater demand for polyacrylamide and more acrylamide monomers. Therefore, the acrylamide industry has ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C233/09C07C231/24
CPCY02P20/10
Inventor 李春友薛建萍时敏江刘占明迟默然孙维波袁华马文勇苏晓飞李德新洪卫陈海峰张治刚
Owner NINGBO XIANAN CHEM
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