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Extraction equipment of caprolactam

An extraction equipment and caprolactam technology, applied in the separation/purification of lactam, organic chemistry, chemical instruments and methods, etc.

Active Publication Date: 2011-08-17
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The eccentric turntable column has a turntable and a phase separation chamber at the same time, trying to meet the requirements of extraction and phase separation, but due to uneven energy input and large amplification effect, it can only be operated at a conservative low speed in industry, and the extraction efficiency and processing capacity of the equipment are low. bulky
The operation flexibility of the pulse packed column is small, the load is low and the extraction efficiency is low compared with the large change, and it is difficult to back-extract to obtain more than 32% caprolactam aqueous solution

Method used

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  • Extraction equipment of caprolactam
  • Extraction equipment of caprolactam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of caprolactam extraction equipment, the schematic diagram is as figure 1 As shown, the equipment includes two parts, a tower body 1 and a buffer 2; the tower body 1 is divided into three parts: a tower top expansion section 11, a tower body 12 and a tower bottom expansion section 13, and above the tower body 12 is a tower top expansion section Section 11, under the tower body 12 is the tower bottom expansion section 13, the cross-sectional area of ​​the tower top expansion section 11 and the tower bottom expansion section 13 are all greater than the cross-sectional area of ​​the tower body 12, the buffer 2 and the tower bottom expansion section 13 is connected at the bottom, and an oil phase distributor 14 is installed at the bottom of the tower body 12, and hydrophilic sieve plates 15 and hydrophobic deflectors 16 are alternately placed on the oil phase distributor 14 in the tower body 12 from bottom to top, The placement method of hydrophilic sieve plates and...

Embodiment 2

[0022] A kind of caprolactam extraction equipment, the schematic diagram is as figure 1 As shown, the equipment includes two parts, a tower body 1 and a buffer 2; the tower body 1 is divided into three parts: a tower top expansion section 11, a tower body 12 and a tower bottom expansion section 13, and above the tower body 12 is a tower top expansion section Section 11, under the tower body 12 is the tower bottom expansion section 13, the cross-sectional area of ​​the tower top expansion section 11 and the tower bottom expansion section 13 are all greater than the cross-sectional area of ​​the tower body 12, the buffer 2 and the tower bottom expansion section 13 is connected at the bottom, and an oil phase distributor 14 is installed at the bottom of the tower body 12, and hydrophilic sieve plates 15 and hydrophobic deflectors 16 are alternately placed on the oil phase distributor 14 in the tower body 12 from bottom to top, The placement of the hydrophilic sieve plates and th...

Embodiment 3

[0024] A kind of caprolactam extraction equipment, the schematic diagram is as figure 1 As shown, the equipment includes two parts, a tower body 1 and a buffer 2; the tower body 1 is divided into three parts: a tower top expansion section 11, a tower body 12 and a tower bottom expansion section 13, and above the tower body 12 is a tower top expansion section Section 11, under the tower body 12 is the tower bottom expansion section 13, the cross-sectional area of ​​the tower top expansion section 11 and the tower bottom expansion section 13 are all greater than the cross-sectional area of ​​the tower body 12, the buffer 2 and the tower bottom expansion section 13 is connected at the bottom, and an oil phase distributor 14 is installed at the bottom of the tower body 12, and hydrophilic sieve plates 15 and hydrophobic deflectors 16 are alternately placed on the oil phase distributor 14 in the tower body 12 from bottom to top, The placement of the hydrophilic sieve plate and the...

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Abstract

The present invention discloses extraction equipment of caprolactam, belonging to the technical field of chemical separation. The equipment of the invention comprises a tower and a buffer, wherein the tower comprises a tower top expanding section, a tower body and a tower bottom expanding section; the buffer is communicated with the bottom of the tower bottom expanding section; an oil phase distributor is installed at the bottom of the tower body; hydrophilic sieve plates and hydrophobic guide plates are alternately arranged on the oil phase distributor in the tower body from top to bottom according to the arranging way that one hydrophobic guide plate is arranged ever whenever 3 to 10 hydrophilic sieve plates are arranged; deflector holes are arranged on the surface of the hydrophobic guide plates; an oil phase enters the tower from the oil phase distributor and flows out from the upper part of the tower top expanding section; an water phase enters the tower from the lower part of the tower top expanding section and flows out from the lower part of the tower bottom expanding section; and pressure in the buffer is cyclically changed so that the water phase reciprocates between the buffer and the tower. The invention has the characteristics of stable and reliable operation, large elasticity, high processing capacity, high mass transfer efficiency and high separation accuracy and recovery rate of the caprolactam, and can obtain a caprolactam water solution with high concentration.

Description

technical field [0001] The invention belongs to the technical field of chemical separation, and in particular relates to a caprolactam extraction equipment. Background technique [0002] Caprolactam is an important chemical fiber monomer. Caprolactam is miscible with water, the production process is complicated, the product quality is high, and the added value of the product is high. These characteristics make the purification and recovery technology of caprolactam both important and difficult. Solvent extraction is by far the most efficient technique for the purification and recovery of caprolactam. [0003] The caprolactam extractants currently used in industry are mainly benzene and toluene. The extraction process generally includes two steps of extraction and stripping. The extraction step is to use an extractant to extract the caprolactam from the amide oil containing more than 60% of the caprolactam. The characteristics of this step are: the distribution coefficien...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D223/10C07D201/16
Inventor 骆广生吕阳成唐晓津
Owner TSINGHUA UNIV
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