Processing method of mother liquor of ainothiazoly loximate

A treatment method of aminothiaxamic acid, applied in organic chemistry, ultrafiltration, etc., can solve the problems of high energy consumption, high COD and BOD, and increased sewage treatment costs for concentrated recovery of aminothiaxamic acid, and achieve the reduction of COD and BOD and other indicators , Guaranteed quality, significant economic and social benefits

Inactive Publication Date: 2011-07-27
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Amthioxamic acid is generally separated from the synthetic mother liquor by crystallization, but the mother liquor after separation and crystallization still contains a certain amount of aminothiaxamic acid, ethanol, NaCl and water, etc. If it is directly discharged as waste liquid, it will not only cause waste of aminothiaxamic acid The presence of COD and BOD will increase the cost of sewage treatment
Concentrating and recovering amthyxamic acid by evaporation method consumes a lot of energy and the quality of the product will be affected.

Method used

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  • Processing method of mother liquor of ainothiazoly loximate
  • Processing method of mother liquor of ainothiazoly loximate
  • Processing method of mother liquor of ainothiazoly loximate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Put the aminothiaxamic acid mother liquor with a content of 1%, pH=6, and a temperature of 25°C in the raw water tank, and pump the aminothiaxamic acid mother liquor into a precision filter with a filtration accuracy of 4.5 μm by a booster pump under the operating condition of a pressure of 0.2 MPa Pretreatment is carried out, and the pretreated mother liquor enters the first-stage circulating water tank, and then is pumped into the first-stage nanofiltration component by the high-pressure pump under the operating pressure of 1.8MPa. The concentration of aminothioxamic acid in the first-stage nanofiltration concentrate can reach about 10%. After being discharged from the system, the crystallization process continues. The first-stage nanofiltration permeate enters the second-stage circulating water tank, and then is pressurized to 1.5MPa by the second-stage high-pressure pump, and enters the second-stage nanofiltration component for treatment. The concentrated liquid of th...

Embodiment 2

[0021] The aminothiaxamic acid mother liquor with a content of 1%, pH=7, and a temperature of 20°C is placed in the raw water tank, and the aminothiaxamic acid mother liquor is pumped into a cloth bag filter with a filtration accuracy of 5 μm by a booster pump under the operating condition of a pressure of 0.3 MPa. Pretreatment, the pretreated mother liquor enters the first-level circulating water tank, and then is pumped into the first-level nanofiltration component by the high-pressure pump under the operating pressure of 2.0MPa. The concentration of aminothioxamic acid in the first-level nanofiltration concentrate can reach about 10%, and is discharged After the system, the crystallization process continues. The first-stage nanofiltration permeate enters the second-stage circulating water tank, and then is pressurized to 1.6MPa by the second-stage high-pressure pump, and enters the second-stage nanofiltration component for treatment. The concentrated liquid of the second-stag...

Embodiment 3

[0023] Put the aminothiaxamic acid mother liquor with a content of 1%, pH=8, and a temperature of 20°C in the raw water tank, and pump the aminothiaxamic acid mother liquor into a ceramic membrane filter with a filtration accuracy of 0.5 μm by a booster pump under the operating condition of a pressure of 1.0 MPa The pretreated mother liquor enters the first-stage circulating water tank, and then is pumped into the first-stage nanofiltration component by the high-pressure pump under the operating pressure of 2.3MPa. The concentration of aminothioxamic acid in the first-stage nanofiltration concentrate can reach about 10%. , after being discharged from the system, the crystallization process continues. The first-stage nanofiltration permeate enters the second-stage circulating water tank, and then is pressurized to 1.8MPa by the second-stage high-pressure pump, and then enters the second-stage nanofiltration component for treatment, and the concentrated liquid of the second-stage ...

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Abstract

The invention discloses a processing method to concentrate and separate the mother liquor of ainothiazoly loximate by using the membrane separation technology, comprising the following steps: (1) pre-processing the mother liquor of ainothiazoly loximate which is to be treated to remove tiny suspended solids; and (2) under the conditions that the operating pressure is 0.5-4.0 MPa and the temperature is 10-80 DEG C, concentrating and separating the pre-processed mother liquor of ainothiazoly loximate by nanofiltration components to obtain the concentrated solution in which the weight percent ofainothiazoly loximate is above 10%, crystallizing the collected solution; rectifying the percolate to recycle ethanol and discharging or directly discharging the percolate into a sewage treatment station to treat. The invention has the advantages that the mother liquor of ainothiazoly loximate can be effectively concentrated so that not only can the effective constituents of ainothiazoly loximatebe recycled from the mother liquor to ensure the quality of ainothiazoly loximate, but also the indexes of COD, BOD and the like discharged from the mother liquor can be reduced, thus reducing the pollution and energy consumption and having remarkable economic and social benefits. The invention can be widely applied in the occasions to concentrate and recover ainothiazoly loximate.

Description

technical field [0001] The invention relates to a method for concentrating and separating a solution by using membrane separation technology, in particular to a method for treating an aminothiaxamic acid mother liquor. Background technique [0002] Amthioxamic acid is an important high value-added pharmaceutical intermediate, mainly used in the synthesis of highly effective third-generation cephalosporins - cephalosporins - cephalosporins, and is one of the main raw materials for the synthesis of AE-active esters. There are four methods for producing aminothiaxamic acid at home and abroad: ethyl acetoacetate single-step method, methyl acetoacetate method, 4-chloroacetoacetate method and ethyl acetoacetate one-pot cooking method. At present, ethyl acetoacetate single-step method is mainly used in China. legal production. This method has disadvantages such as low reaction yield, high cost, large reaction volume, unfavorable determination of the amount of intermediate products...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D277/593B01D61/18
Inventor 李平郑庚修王秋芬苏可
Owner UNIV OF JINAN
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