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Physical index optimizing system for recycling DMAC (dimethylacetamide)

A technology of index optimization and physical properties, applied in the field of spandex production, can solve the problems of cumbersome operation, high energy consumption, low separation efficiency, etc., and achieve the effects of fast refining, reduced recovery cost, and increased output

Active Publication Date: 2014-09-17
ZHEJIANG KAIPUTE SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The packing of the existing rectification system has defects such as low separation efficiency, high energy consumption, and cumbersome operation. In order to overcome the above-mentioned shortcomings of the rectification system, the present invention provides a DMAC recovery physical and chemical index optimization with high separation efficiency, convenient operation, and low energy consumption. system

Method used

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  • Physical index optimizing system for recycling DMAC (dimethylacetamide)
  • Physical index optimizing system for recycling DMAC (dimethylacetamide)
  • Physical index optimizing system for recycling DMAC (dimethylacetamide)

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Embodiment Construction

[0023] In this embodiment, the DMAC recycling physical index optimization system combines figure 1 , comprising a dehydration tower 1, a crude solvent tank 2, a refining tower 3, a still supply tank 4 and a recovery tower 5, the dehydration tower 1 is connected to a feed pipe 8, and the bottom of the dehydration tower 1 is connected to the middle part of the refining tower 3 through the crude solvent tank 2, The bottom of the refining tower 3 communicates with the bottom of the recovery tower 5 through the still supply tank 4; the middle part of the dehydration tower 1 is connected with a preheater 7, and the top is connected with a condenser-1a and a cryocooler-1b, and the condenser-1b is provided with a condenser Liquid receiving tank 1c, condensate receiving tank 1c communicates with dehydration tower 1 through return pipe 1d, cryocooler 1b bottom communicates with condensate receiving tank 1c, cryocooler 1b top is provided with vacuum pump 1e; refining tower 3 top Condense...

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Abstract

The invention relates to a physical index optimizing system for recycling DMAC (dimethylacetamide), which belongs to the technical field of spandex production. The physical index optimizing system for recycling DMAC comprises a dehydrating tower, a coarse solvent tank, a refining tower, a distillation still supplying tank and a recovery tower, wherein the dehydrating tower is connected with a feed pipe, the bottom of the dehydrating tower is communicated to the middle of the refining tower through the coarse solvent tank, and the bottom of the refining tower is communicated with the bottom of the recovery tower through the distillation still supplying tank; a preheater is connected to the middle of the dehydrating tower, and a No.1 condenser and a No.1 chiller are connected to the top of the dehydrating tower; a No.2 condenser and a No.2 chiller are connected to the top of the refining tower; a No.3 condenser is arranged on the top of the recovery tower, a No.3 condensate receiving tank is arranged on the No.3 condenser, and a No.3 vacuum pump is arranged on the top of the No.3 condenser. By adopting the physical index optimizing system to recycle DMAC in the process of spandex production, normal operation of a DMAC distillation system is guaranteed, and the yield and physical indexes of the recycled DMAC are greatly increased.

Description

technical field [0001] The invention relates to a DMAC (N,N dimethylacetamide) recovery physical property index optimization system, through the technical transformation of the dehydration tower and the rectification tower of the DMAC rectification system, the optimized DMAC physical property index optimization is realized, and belongs to the technical field of spandex production . Background technique [0002] In the chemical production process, it is often necessary to separate raw materials, intermediate products or crude products to obtain chemical products or intermediate products that meet the process requirements. Common separation processes in chemical industry include distillation, absorption, extraction, drying, and crystallization, among which distillation is a typical unit operation for separating liquid mixtures and is the most widely used. The spandex dry spinning process needs to use a large amount of DMAC as a solvent for recycling. During the solvent dry sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D3/14C07C233/05C07C231/24
Inventor 王子成
Owner ZHEJIANG KAIPUTE SPANDEX
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