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Method for extracting and refining potassium salt from mica acid production wastewater

A technology for producing wastewater and side-chain acids, which is applied in combustion methods, chemical instruments and methods, water/sewage treatment, etc., can solve problems such as low purity of potassium silicate, increase of harmful gas content in combustion tail gas, and high treatment costs, and achieve investment Low cost, less impurities, and high wastewater treatment efficiency

Inactive Publication Date: 2019-11-01
山东金城晖瑞环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The treatment temperature of this method is too high, plastics, rubber and other substances need to be added, which increases the harmful gas content in the combustion exhaust gas, and silicon dioxide also needs to be added, the treatment cost is high, and the solid produced by incineration has not been separated from potassium silicate , the purity of potassium silicate obtained is lower

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 10t of cefixime side chain acid production wastewater is treated, and potassium chloride is extracted, and the potassium ion mass content of the detected wastewater is 7.8%, the calorific value is 82cal / g, and the pH value is 6.5, the method is as follows:

[0032] (1) Pretreatment: adopt the conventional concentration method to concentrate the waste water produced by cefixime side chain acid until the mass content of potassium ions is 18%, then add high calorific value wastewater (calorific value > 1000cal / g) until its calorific value reaches 500±50cal / g, then add waste potassium hydroxide until its pH value is 8±0.5;

[0033] (2) Incineration: The temperature of the high-temperature liquid incinerator is controlled at 900°C, the pretreated wastewater is sprayed into the high-temperature liquid incinerator for incineration, and the gas-solid separation is carried out through the cyclone separator and bag filter, and the generated gas is subjected to high temperature Af...

Embodiment 2

[0038] 5t of cefixime side chain acid production wastewater is treated, and potassium chloride is extracted, and the potassium ion mass content of the detected wastewater is 9.6%, the calorific value is 1130cal / g, and the pH value is 12.2, the method is as follows:

[0039] (1) Pretreatment: adopt the conventional concentration method to concentrate the waste water from the production of cefixime side chain acid until the mass content of potassium ions is 20%, and then add low calorific value wastewater (calorific value<100cal / g) until its calorific value reaches 900±100cal / g, then add waste hydrochloric acid until its pH value is 8±0.5;

[0040] (2) Incineration: The temperature of the high-temperature liquid incinerator is controlled at 600°C, the pretreated wastewater is sprayed into the high-temperature liquid incinerator for incineration, and the gas-solid separation is carried out through a cyclone separator and a bag filter. After denitrification, desulfurization, absor...

Embodiment 3

[0045] 10t of cefixime side chain acid production wastewater is treated, and potassium chloride is extracted, and the potassium ion mass content of the detected wastewater is 6.2%, the calorific value is 95cal / g, and the pH value is 5.3, the method is as follows:

[0046] (1) Pretreatment: Concentrate the waste water from the production of cefixime side chain acid by conventional concentration methods until the mass content of potassium ions is 15%, then add methanol until its calorific value reaches 200±50cal / g, and then add waste oxidation Potassium and waste potassium hydroxide to its pH value of 8 ± 0.5;

[0047] (2) Incineration: The temperature of the high-temperature liquid incinerator is controlled at 1200°C, the pretreated wastewater is sprayed into the high-temperature liquid incinerator for incineration, and the gas-solid separation is carried out through the cyclone separator and bag filter, and the generated gas is subjected to high temperature After denitrificati...

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Abstract

The invention relates to the technical field of wastewater treatment, in particular to a method for extracting and refining a potassium salt from mica acid production wastewater. The method for extracting and refining the potassium salt from the mica acid production wastewater comprises the following steps: firstly, concentrating the mica acid production wastewater, and adjusting the heat value and the pH value of the mica acid production wastewater; controlling the temperature of a high-temperature liquid incinerator to be 600-1200 DEG C, spraying the pretreated wastewater into the high-temperature liquid incinerator for high-temperature decomposition, performing high-temperature denitration on generated gas, performing desulfurization, performing absorption, performing water washing treatment, performing emptying, and recycling incineration residues at the bottom of the incinerator; and finally, adding water into the incineration residues for dissolving, performing filtering, performing concentrating, and performing crystallizing to obtain the potassium salt. According to the method provided by the invention, the potassium salt in the wastewater is extracted in the wastewater treatment process, the equipment investment costs of the whole process are low, the wastewater treatment costs are low, the recovery rate of the potassium salt is high, and the purity of the recovered potassium salt is high.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for extracting refined potassium salt from cefixime side chain acid production wastewater. Background technique [0002] Cefixime side chain acid (MICA ACID) is an important pharmaceutical intermediate, which needs to go through oximation, alkylation, chloroacidolysis, cyclization and other reactions in sequence during preparation, wherein the alkylation reaction and cyclization reaction require Potassium salt is added as a reactant, and the wastewater produced after the reaction is completed contains a large amount of potassium ions and organic matter, and the content of water-soluble organic matter is relatively high. The treatment of this kind of saline wastewater is difficult. The treatment effect of traditional biological treatment methods is greatly affected by the salt content. High-concentration inorganic salt can destroy the cell membrane of microor...

Claims

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Application Information

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IPC IPC(8): C01D3/14C02F1/04F23G7/04C02F103/34C02F103/36
CPCC01D3/14C01P2006/80C02F1/048C02F2103/343C02F2103/36F23G7/04
Inventor 周国勇陈作林张玉森
Owner 山东金城晖瑞环保科技有限公司
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