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Magnetization rectification method for reclaiming acetone from waste acetone menstruum

A technology of waste acetone and acetone, which is applied in the separation/purification of carbonyl compounds, organic chemistry, etc., and can solve the problems of high energy consumption, low efficiency, and high cost

Inactive Publication Date: 2008-06-04
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional separation methods have low efficiency, high energy consumption and high cost

Method used

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  • Magnetization rectification method for reclaiming acetone from waste acetone menstruum

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Experimental program
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Effect test

Embodiment 1

[0015] A method for reclaiming acetone by magnetic distillation from waste acetone solvent, comprising the steps of:

[0016] (1) Adopt the static magnetization method, in the NdFeB magnetizer whose magnetic induction intensity is 0.515T, add 300mL acetone mass percentage content to be 60.5% waste acetone solvent and carry out magnetization treatment, magnetization treatment time 12h, has reached Magnetic saturation state, stored in the feed tank;

[0017] (2) a neodymium-iron-boron magnetic field with a magnetic induction of 0.45T is arranged outside the rectifying kettle, and the waste acetone solvent (100mL) of the part magnetic saturation state processed through step (1) that is stored in the feed tank is input into the rectifying tank Still, under normal pressure, it is operated in a continuous rectification mode. The operating conditions are: total reflux operation for 0.5h at the beginning, when the temperature at the top of the rectification tower reaches 56.4°C and st...

Embodiment 2

[0023] A method for reclaiming acetone by magnetic distillation from waste acetone solvent, comprising the steps of:

[0024] (1) The waste acetone solvent is placed in an NdFeB magnetizer with a magnetic induction intensity of 0.15T, left to be magnetized for 12 hours, so that the waste acetone solvent reaches magnetic saturation, and stored in a feed tank;

[0025] (2) a neodymium-iron-boron magnetic field of 0.15T is arranged on the outside of the rectifying still, and the waste acetone solvent in the partial magnetic saturation state processed through step (1) that is stored in the feed tank is input into the rectifying still, Under normal pressure, adopt continuous rectification to operate, the operating conditions are: total reflux operation at the beginning for 0.3h, when the temperature at the top of the rectification tower reaches 56.4°C and stabilizes, add the said process to the rectification tower at 20mL / h The waste acetone solvent in the magnetic saturation state...

Embodiment 3

[0027] A method for reclaiming acetone by magnetic distillation from waste acetone solvent, comprising the steps of:

[0028] (1) Place the waste acetone solvent in an NdFeB magnetizer with a magnetic induction of 0.515T, let it stand for magnetization for 10 hours, make the waste acetone solvent reach magnetic saturation, and store it in the feed tank;

[0029] (2) a neodymium-iron-boron magnetic field of 0.45T is arranged on the outside of the rectification kettle, and the waste acetone solvent of the part of the magnetic saturation state processed through step (1) is stored in the feed tank to input the rectification kettle, Under normal pressure, adopt the continuous rectification mode to operate, the operating conditions are: at the beginning, the total reflux operation is 0.6h, when the rectification tower top temperature reaches 56.4 ℃ and stabilizes, add the said process in the rectification tower at 10mL / h The waste acetone solvent in the magnetic saturation state tre...

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Abstract

The invention discloses a method used for recovering an acetone through magnetization and rectification of a waste acetone menstruum. The method comprises the steps that: (1) the waste acetone menstruum is arranged in an Nd-Fe-B magnetizer, reaches a magnetic saturation status and stored in a feeding tank; (2) an Nd-Fe-B magnetic field is arranged outside a rectifying still, a part of the waste acetone menstruum stored in the feeding tank is input to the rectifying still, and operated in a continuous rectification manner at normal pressure, and the operation conditions are: firstly the waste acetone menstruum is infinite refluxed for 0.3 to 0.6 hour, and the waste acetone menstruum treated by step (1) is added into a rectifying tower at a speed of 10 to 20ml / h when the temperature on the top of the rectifying tower reaches and kept at 56.4 DEG C; the acetone product is drawn out from the top of the rectifying tower in reflux ratio of 5 to 7, and the waste water is discharged from the bottom of the tower. The method of the invention increases the mass transference efficiency by more than 6 percent, the mass content of acetone of the acetone product is as high as 99.2 percent, and the recovery rate of acetone reaches 98.6 percent, which has comparatively remarkable effect.

Description

technical field [0001] The invention relates to a method for recovering acetone, in particular to a method for recovering acetone from waste acetone solvent through magnetic distillation. Background technique [0002] Acetone is widely used as a solvent in the pharmaceutical process. After use, acetone, water and other trace drugs form a solution, which is the waste acetone solvent. If solvent recovery is not carried out, on the one hand, it will cause environmental pollution, and on the other hand, it will lead to increased production costs. In order to recycle acetone, water and trace components must be removed, and rectification is usually used in industry for separation. Traditional separation methods have low efficiency, high energy consumption and high cost. In order to reduce environmental pollution, further increase the recovery rate of acetone, and create greater economic benefits, a separation method with high efficiency, low energy consumption, and low cost is u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C49/08C07C45/82
Inventor 贾绍义吴松海孙永利赵沧燕袁海荣孙瑞军
Owner TIANJIN UNIV
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