Method for recycling copper and zinc in catalyst production wastewater

A technology for producing wastewater and catalysts, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve problems such as difficulty in recycling, pollution, and increased production costs, and achieve simple process, efficient enrichment, and stable operation. Effect

Pending Publication Date: 2022-02-22
SINOPEC NANJING RES INST OF CHEM IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] CN201010212322 has announced a kind of treatment method of copper-based methanol synthesis catalyst wastewater, adding calcium polysulfide (CaS X ) precipitant, while removing Cu in wastewater 2+ , Zn 2+ , this method adds chemical agent, causes the increase of production cost, and recovery is comparatively difficult; CN200510046816 discloses technology utilizes adsorbent to carry out adsorption removal to heavy metal ion, but adsorbent regeneration is difficult, and causes new pollution

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  • Method for recycling copper and zinc in catalyst production wastewater

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The catalyst production wastewater material was taken from a domestic manufacturer, and the sample material conditions are shown in Table 1:

[0024] Table 1 The material situation of catalyst production wastewater in a domestic manufacturer

[0025] Test items SS Na +

NO 3 -

Cu 2+

Zn 2+

unit mg / L mg / L mg / L mg / L mg / L value 50 1000 3000 0.1 0.1

[0026] Wastewater material enters the hollow fiber ultrafiltration system unit, the operating temperature is 20°C, the control operating pressure is 0.1 MPa, the membrane surface flow velocity is 2 m / s, and the membrane flux is 60 L / (m 2 h), after testing, the water produced by the ultrafiltration unit: SS=0.05 mg / L.

[0027] The product water enters the roll-type nanofiltration membrane system unit, the operating temperature is 20°C, the operating pressure is 0.5 MPa, the membrane surface flow velocity is 2m / s, and the membrane flux is 30 L / (m 2 h), the recover...

Embodiment 2

[0030] The methanol synthesis catalyst waste water material is taken from a domestic manufacturer, and the sample material conditions are shown in Table 2:

[0031] Table 2 The material situation of catalyst production wastewater in a domestic manufacturer

[0032] Test items SS Na +

NO 3 -

Cu 2+

Zn 2+

unit mg / L mg / L mg / L mg / L mg / L value 100 5000 15000 8 5

[0033] The waste water material enters the spiral ultrafiltration membrane system unit, the operating temperature is 35°C, the control operating pressure is 0.5 MPa, the membrane surface flow velocity is 3 m / s, and the membrane flux is 300 L / (m 2 h), after testing, the water produced by the ultrafiltration unit: SS=0.08 mg / L.

[0034] The product water enters the flat-panel nanofiltration membrane system unit, the operating temperature is 30°C, the operating pressure is 3 MPa, the membrane surface flow velocity is 3m / s, and the membrane flux is 60 L / (m 2 h...

Embodiment 3

[0037] The methanol synthesis catalyst waste water material is taken from a domestic manufacturer, and the sample material conditions are shown in Table 3:

[0038] Table 3 Situation of catalyst production waste water materials of a domestic manufacturer

[0039] Test items SS Na +

NO 3 -

Cu 2+

Zn 2+

unit mg / L mg / L mg / L mg / L mg / L value 50 10000 30000 20 20

[0040] Wastewater material enters the coiled ultrafiltration membrane system unit, the operating temperature is 50 °C, the control operating pressure is 1 MPa, the membrane surface flow rate is 5 m / s, and the membrane flux is 600 L / (m 2 h), after testing, the water produced by the ultrafiltration unit: SS=0.05 mg / L.

[0041] The product water enters the ceramic tubular nanofiltration membrane system unit, the operating temperature is 50 °C, the operating pressure is 5 MPa, the membrane surface flow velocity is 5 m / s, and the membrane flux is 80 L / (m 2 h), ...

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Abstract

The invention relates to a method for recycling copper and zinc in catalyst production wastewater. The method mainly uses an ultra-filtration system unit, a nano-filtration system unit and an electrodialysis system unit. The method comprises the following steps: a, removing SS and colloid in catalyst production wastewater by using the ultra-filtration system unit, and introducing produced water into the nano-filtration system unit; b, separating and concentrating copper and zinc ions in the water produced by the ultra-filtration system unit by using the nano-filtration system unit technology, introducing nano-filtration produced water into a salt recovery system, and introducing nano-filtration concentrated water into the electrodialysis system unit; and c, effectively separating mono-valent ions and divalent ions in the nano-filtration concentrated solution by the electrodialysis system unit, efficiently enriching copper and zinc ions, recycling the copper and zinc ions, and introducing electrodialysis produced water into a salt recycling system. According to the method, copper and zinc in the catalyst production wastewater are efficiently recycled, the copper and zinc ion recovery rate reaches 95% or above, the technological conditions are simple and stable, no additional agent exists, pollution and toxicity are avoided, and the economic benefits are remarkable.

Description

technical field [0001] The invention belongs to the field of water treatment and relates to a method for recycling copper and zinc in catalyst production wastewater. Background technique [0002] Copper-zinc catalysts can be used for low-temperature shift reactions, hydrogenation reactions, dehydrogenation reactions, and methanol synthesis reactions. The great waste of raw materials, with the increasingly stringent environmental protection laws and regulations, people's awareness of environmental protection is constantly increasing, and the requirements for wastewater treatment are getting higher and higher. From the past secondary discharge standard to the current primary discharge standard, it is even necessary to Most of the waste water is reused after treatment. The wastewater treatment methods mainly include: precipitation method, adsorption method, microbial method and so on. [0003] CN201010212322 has announced a kind of treatment method of copper-based methanol sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F101/20
CPCC02F1/444C02F1/442C02F1/4693C02F2101/20
Inventor 陈海波杨刚毛春鹏李忠于仇冬于杨李兴田檀结东杨爱军
Owner SINOPEC NANJING RES INST OF CHEM IND CO LTD
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