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Method for regenerating resin in isopropanol recovery process

A technology of resin regeneration and isopropanol, applied in separation methods, filter regeneration, chemical instruments and methods, etc., can solve the problems of high-temperature regeneration of activated carbon, difficult treatment, secondary pollution, etc., and achieve high economic and environmental benefits , Increase the number of cycles and prolong the cycle life

Active Publication Date: 2020-12-08
WUXI ZHONGTIAN SOLID WASTE DISPOSAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, isopropanol is often used as a cleaning solution in the electronics industry or printing industry. These isopropanol cleaning waste liquids contain a lot of isopropanol and are difficult to recycle, which not only increases production costs, but also pollutes the environment or waste water. Difficult to handle
[0004] CN2539738Y discloses a device for extracting isopropanol from the waste liquid for cleaning printing plates, and CN1249294A discloses a method for refining isopropanol in a combined process of salt extraction and azeotropic rectification using rectification to recover high-purity isopropanol, but no mention of how to dispose of the isopropanol stock solution
[0005] CN102173521B discloses a treatment method for high-concentration isopropanol-containing industrial wastewater using catalytic oxidation to treat isopropanol wastewater, but because isopropanol is easy to volatilize, the way of aeration will produce isopropanol waste gas, causing secondary pollution
[0006] CN104525114B discloses a method for treating isopropanol wastewater with modified activated carbon. Modified activated carbon is used to adsorb isopropanol wastewater, but the initial COD value it can handle is low, and activated carbon requires high-temperature regeneration, which has a high cost to equipment. Require

Method used

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  • Method for regenerating resin in isopropanol recovery process
  • Method for regenerating resin in isopropanol recovery process
  • Method for regenerating resin in isopropanol recovery process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] The present embodiment provides a kind of method that reclaims resin regeneration in the isopropanol process, and described method comprises the steps:

[0071] (A) Utilize the first crude isopropanol after pretreatment to carry out solvent regeneration to the macroporous resin after adsorption (the column height of the model is XDA experimental packing is 30cm, and the density of macroporous resin is 1.2g / mL), The temperature of described solvent regeneration is 40 ℃, and the flow rate of the first crude isopropanol is 1BV / h, and the consumption of the first crude isopropanol is 2 times of resin volume; The quality of isopropanol in the first crude isopropanol The percentage content is 60wt%;

[0072] (B) Using steam to regenerate the macroporous resin after the solvent regeneration in step (A), the temperature of the steam regeneration is 130° C., the quality of the steam is 3 kg, and the pressure is 0.3 kPa.

Embodiment 2

[0074] The present embodiment provides a kind of method that reclaims resin regeneration in the isopropanol process, and described method comprises the steps:

[0075] (A) Utilize the first crude isopropanol after pretreatment to carry out solvent regeneration to the macroporous resin after adsorption (the column height of the model is XDA experimental packing is 32cm, and the density of macroporous resin is 1.2g / mL), The temperature of the solvent regeneration is 5°C, the flow rate of the first crude isopropanol is 0.5BV / h, and the amount of the first crude isopropanol is 3 times of the volume of the resin;

[0076] (B) Using steam to regenerate the macroporous resin after solvent regeneration in step (A), the temperature of the steam regeneration is 180° C., the quality of the steam is 4 kg, and the pressure is 0.4 kPa.

Embodiment 3

[0078] The present embodiment provides a kind of method that reclaims resin regeneration in the isopropanol process, and described method comprises the steps:

[0079] (A) Utilize the first crude isopropanol after the pretreatment to carry out solvent regeneration to the macroporous resin after the adsorption (the column height of the model is XDA experimental packing is 28cm, and the density of the macroporous resin is 1.2g / mL), The temperature for solvent regeneration is 45°C, the flow rate of the first crude isopropanol is 2BV / h, and the amount of the first crude isopropanol is 0.5 times the volume of the resin;

[0080] (B) Using steam to regenerate the macroporous resin after the solvent regeneration in step (A), the temperature of the steam regeneration is 120° C., the quality of the steam is 2 kg, and the pressure is 0.2 kPa.

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Abstract

The invention provides a method for regenerating resin in an isopropanol recovery process. The method comprises the following steps: carrying out solvent regeneration on adsorbed resin by using pretreated first crude isopropanol; using steam to carry out steam regeneration on the resin subjected to solvent regeneration, using the first crude isopropanol to regenerate the resin while the purposes of effective resin regeneration and waste treatment by using waste are achieved, using the steam regeneration to provide effects of residual isopropanol cleaning and deep regeneration. The resin recycling service life is long, and the isopropanol recovery process cost is reduced.

Description

technical field [0001] The invention relates to the technical field of waste liquid treatment, in particular to a method for regenerating resin in the process of recovering isopropanol. Background technique [0002] Isopropanol is an organic compound, an isomer of n-propanol, also known as dimethylmethanol and 2-propanol. It is also known as IPA in the industry. It is a colorless and transparent liquid that resembles a mixture of ethanol and acetone. Odor, soluble in water, also soluble in most organic solvents such as alcohol, ether, benzene and chloroform, isopropanol is an important chemical product and raw material. [0003] At present, isopropanol is often used as a cleaning solution in the electronics industry or printing industry. These isopropanol cleaning waste liquids contain a lot of isopropanol and are difficult to recycle, which not only increases production costs, but also causes serious environmental pollution or waste water. Difficult to handle. [0004] CN...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34B01J20/26C07C29/76C07C31/10
CPCB01J20/3466B01J20/3425B01J20/3475C07C29/76C07C31/10
Inventor 伍元东孙志洋
Owner WUXI ZHONGTIAN SOLID WASTE DISPOSAL CO LTD