Treatment method for resource utilization of waste liquid in production of graphene oxide

A processing method, graphene technology, applied in chemical instruments and methods, filtration treatment, multi-stage water treatment, etc., to achieve the effects of simple operation, reduced operating costs, and improved economic benefits of enterprises

Active Publication Date: 2019-02-12
新疆烯金石墨烯科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The object of the present invention is to provide a treatment method for resource utilization of waste liquid in graphene oxide production, which solves the problem of waste water treatment on the one hand through the development and application of concentration and crystallization treatment process for graphene oxide production waste water On the other hand, the purpose of reusing waste acid and waste water is achieved; the manganese sulfate product prepared in the process of evaporation and crystallization is of good quality; the method is green and environmentally friendly, low in cost, and suitable for large-scale promotion and use

Method used

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  • Treatment method for resource utilization of waste liquid in production of graphene oxide
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  • Treatment method for resource utilization of waste liquid in production of graphene oxide

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Effect test

Embodiment 1

[0040] The schematic diagram of the process is as follows figure 1 As shown, the specific operation is as follows:

[0041] (1) Wastewater pretreatment: use the acid-resistant pump to inject the waste water produced in the production into the stock solution tank for pretreatment, filter and remove solid impurities, and obtain clarified waste water A (containing SO 4 2- 、H 3 o + , Mn 2+ ).

[0042] (2) Evaporation and crystallization: The above-mentioned clarified waste water A is introduced into the evaporation and crystallization system, and the temperature is controlled at 85° C., the pressure is -0.085 MPa, and the stirring speed is 170 r / min, and the vacuum evaporation concentration is carried out. The whole process adopts negative pressure technology to reduce the evaporation temperature.

[0043] After the sulfuric acid waste liquid is evaporated and concentrated to a certain extent, manganese sulfate crystals appear. When manganese sulfate is close to saturation,...

Embodiment 2

[0050] The schematic diagram of the process is as follows figure 1 As shown, the specific operation is as follows:

[0051] (1) Wastewater pretreatment: use the acid-resistant pump to inject the waste water produced in the production into the stock solution tank for pretreatment, filter and remove solid impurities, and obtain clarified waste water A (containing SO 4 2- 、H 3 o + , Mn 2+ ).

[0052] (2) Evaporation and crystallization: The above-mentioned clarified waste water A is introduced into the evaporation and crystallization system, and the temperature is controlled at 90°C, the pressure is -0.080MPa, and the stirring speed is 160r / min, and the vacuum evaporation and concentration are carried out. The whole process adopts negative pressure technology to reduce the evaporation temperature.

[0053] After the sulfuric acid waste liquid is evaporated and concentrated to a certain extent, manganese sulfate crystals appear. When manganese sulfate is close to saturation...

Embodiment 3

[0059] The schematic diagram of the process is as follows figure 1 As shown, the specific operation is as follows:

[0060] (1) Wastewater pretreatment: use the acid-resistant pump to inject the waste water produced in the production into the stock solution tank for pretreatment, filter and remove solid impurities, and obtain clarified waste water A (containing SO 4 2- 、H 3 o + , Mn 2+ ).

[0061] (2) Evaporation and crystallization: the above-mentioned clarified waste water A is introduced into the evaporation and crystallization system, and the temperature is controlled at 70°C, the pressure is -0.090MPa, and the stirring speed is 200r / min, and the vacuum evaporation concentration is carried out. The whole process adopts negative pressure technology to reduce the evaporation temperature.

[0062] After the sulfuric acid waste liquid is evaporated and concentrated to a certain extent, manganese sulfate crystals appear. When manganese sulfate is close to saturation, man...

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Abstract

The invention relates to a treatment method for resource utilization of waste liquid in production of graphene oxide. The treatment method comprises the following steps of (1) pretreating the wastewater, so as to obtain wastewater A; (2) evaporating and crystallizing the wastewater A, and filtering, so as to obtain crystals, condensate water I and wastewater B; washing and drying the crystals, soas to obtain manganese sulfate crystals; (3) distilling and concentrating the wastewater B under a vacuum condition, so as to obtain condensate water II and recycled acid; returning the condensate water I, the condensate water II and the recycled acid back into the production technology for recycling. The treatment method for the resource utilization of the waste liquid in the production of the graphene oxide has the advantages that the characteristic of dissolving degree of the manganese sulfate in sulfuric acid is utilized, and the crystals are removed by the evaporation and crystallizationtechnology, so as to obtain the manganese sulfate; the obtained wastewater in the separating process is concentrated into finished acid, and the finished acid and the condensate water produced in theevaporation process are returned back into the production process for recycling, so as to realize the purposes of zero drainage and high-efficiency recycling of the wastewater in the production process of the graphene oxide.

Description

technical field [0001] The invention belongs to the field of waste water treatment of graphene oxide production, and in particular relates to a treatment method for resource utilization of waste liquid in graphene oxide production. Background technique [0002] Graphene oxide is a new type of carbon material with excellent performance, which has a high specific surface area and abundant functional groups on the surface. Its large number of oxygen-containing functional groups makes the carbon layer negatively charged, and positively charged cations can easily enter the interlayer and expand the interlayer distance, which provides favorable conditions for the loading of polymers and inorganic nanoparticles. Graphene oxide composites obtained by modifying the surface of graphene oxide include polymer composites and inorganic composites, all of which show superior performance and have broad application prospects. [0003] The preparation methods of graphene oxide mainly include...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C01G45/10C01B17/88C01B17/90C02F103/34
CPCC01B17/88C01B17/901C01G45/10C01P2002/88C01P2004/03C02F1/001C02F1/04C02F2103/34C02F2301/08
Inventor 曾艳杨新伟杨杰朋杨子虎鲁娜
Owner 新疆烯金石墨烯科技有限公司
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