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Established in 2001, Puyang Zhong Yuan Restar Petroleum Equipment Co.,Ltd, “RSD” for short, is Henan’s high-tech enterprise with intellectual property advantages and independent legal person qualification. With registered capital of RMB 50 million, the Company has two subsidiaries-Henan Restar Separation Equipment Technology Co., Ltd We are mainly specialized in R&D, production and service of various intelligent separation and control systems in oil&gas drilling,engineering environmental protection and mining industries.We always take the lead in Chinese market shares of drilling fluid shale shaker for many years. Our products have been exported more than 20 countries and always extensively praised by customers. We are Class I network supplier of Sinopec,CNPC and CNOOC and registered supplier of ONGC, OIL India,KOC. High quality and international standard products make us gain many Large-scale drilling fluids recycling systems for Saudi Aramco and Gazprom projects.

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fracturing fundamentals practice activity
Electrochemical removal of tannins from aqueous solutions ...
Electrochemical removal of tannins from aqueous solutions ...

Macroscale potentiostatic or galvanostatic electrolyses were carried out with sodium sulfate or sodium chloride as supporting electrolytes, to analyze direct and indirect oxidation processes. Operating variables such as pH and chloride concentration were considered to determine their influence on the efficiency and energy consumption of the process.

Avoidance of Chlorine Formation during Electrolysis at ...
Avoidance of Chlorine Formation during Electrolysis at ...

30/11/2019, · While the main focus of this study is on the MDA ,wastewater,, an organic compound that excludes reuse of the PC ,wastewater, in a CAE is N-(chloromethyl)-N-ethylpiperidinium chloride (EPP), which acts as a (reversible) membrane toxicant in low concentrations. 5 EPP displaces the proton of the sulfonic ,acid, group of a cation exchange membrane, resulting in drastic increasing cell voltages.

THE APPLICATION OF REGENERATION TECHNOLOGY OF …
THE APPLICATION OF REGENERATION TECHNOLOGY OF …

Regeneration technology for ,electrolysis, of ,sodium sulfate, and its process flow were intrduced. The influencing factors were analysed and discussed. By applying the regeneration technology for ,electrolysis, of ,sodium sulfate,,Cr6 + concentration would decrease effectively to 2 ~ 3 g/L and Me concentration 2 ~ 5 g/L. The process effectively solves the problems about metal ion over standard ...

(PDF) CONVERSION OF WASTE SODIUM SULFATE WITH BIPOLAR ...
(PDF) CONVERSION OF WASTE SODIUM SULFATE WITH BIPOLAR ...

Abstract and Figures This paper presents the possibility of conversion of waste sodium sulphate to sulphuric acid and sodium hydroxide by bipolar membrane, electrodialysis, with Ralex membranes. The...

Research on the mechanism and reaction conditions of ...
Research on the mechanism and reaction conditions of ...

recycling of ,sulfate, in ,wastewater,. Materials and methods Materials The main reagents involved in the experiment include ,sodium sulfate,, potassium iodide, ,sodium, hydroxide, sulfuric ,acid,, tert-butyl alcohol (TBA), carbamazepine (CBZ), ,sodium, persulfate (PDS), ,sodium, bicarbonate, 5,5-dimethyl-1 …

Recovery of Acid and Base from Sodium Sulfate Containing ...
Recovery of Acid and Base from Sodium Sulfate Containing ...

22/2/2021, · In this research, bipolar membrane, electrodialysis, (BMED) technology was developed to treat waste sodium sulfate containing lithium carbonate for conversion of low-value sodium sulfate into high-value sulfuric acid and sodium hydroxide. Both can be used as raw materials in upstream processes.

Electrochemical removal of tannins from aqueous solutions ...
Electrochemical removal of tannins from aqueous solutions ...

@article{osti_20015488, title = {Electrochemical removal of tannins from aqueous solutions}, author = {Buso, A and Balbo, L and Giomo, M and Farnia, G and Sandona, G}, abstractNote = {The application of electrochemical methods to remove tannins from ,wastewater, was investigated. Gallotannic ,acid, was used as the reference substance. Electrochemical experiments were performed using platinum e

Sunlight-induced photoreduction of Cr(VI) to Cr(III) in ...
Sunlight-induced photoreduction of Cr(VI) to Cr(III) in ...

20/5/2019, · Xu, Q. et al. Synthesis, mechanical investigation, and application of nitrogen and ,phosphorus, co-doped carbon dots with a ,high, photoluminescent quantum yield. Nano Res. 1 , 3691–3701 (2017). 11.

CN1339332A - Sulphur dioxide removing electrolysis process ...
CN1339332A - Sulphur dioxide removing electrolysis process ...

The wet gas desulfurizing and desulfurizing agent regenerating process of the present invention belongs to the field of gas purifying and electrolysis technology. Inside a gas washer, the desulfurizing mixture solution ,containing sodium sulfate, and ,sodium, hydroxide as main components is used to wash and desulfurize SO2 ,containing, gas, the effluent after desulfurization is aerated before ...

Indirect Electrochemical Oxidation of Dye Wastewater ...
Indirect Electrochemical Oxidation of Dye Wastewater ...

for ,electrolysis, in galvanostatic mode. In order to maintain the necessary conductivity, 0.005 M ,sodium sulfate, (Na 2 SO 4) was added into the synthetic dye ,wastewater, in all experiments. The influence of the operating parameters, including current density (I), ,sodium, chloride (NaCl) dosage, initial pH

Electrochemical Treatment of Phenolic Wastewater with ...
Electrochemical Treatment of Phenolic Wastewater with ...

and 30 mL ,sodium sulfate, solution were added to the electrolytic cell, and the two electrodes were kept parallel and immersed vertically in the electrolyte. The two electrodes were stirred magnetically, the DC

Electrochemical Treatment of Phenolic Wastewater with ...
Electrochemical Treatment of Phenolic Wastewater with ...

and 30 mL ,sodium sulfate, solution were added to the electrolytic cell, and the two electrodes were kept parallel and immersed vertically in the electrolyte. The two electrodes were stirred magnetically, the DC

Integrating Diffusion Dialysis with Membrane Electrolysis ...
Integrating Diffusion Dialysis with Membrane Electrolysis ...

Recovery ,of Acid, and Base from ,Sodium Sulfate Containing, Lithium Carbonate Using Bipolar Membrane Electrodialysis. Membranes 2021, 11 (2) , 152. https://doi.org/10.3390/membranes11020152; Haiyang Yan, Liang Wu, Yaoming Wang, Muhammad Irfan, Chenxiao Jiang, Tongwen Xu.

CN1339332A - Sulphur dioxide removing electrolysis process ...
CN1339332A - Sulphur dioxide removing electrolysis process ...

The wet gas desulfurizing and desulfurizing agent regenerating process of the present invention belongs to the field of gas purifying and ,electrolysis, technology. Inside a gas washer, the desulfurizing mixture solution ,containing sodium sulfate, and ,sodium, hydroxide as main components is used to wash and desulfurize SO2 ,containing, gas, the effluent after desulfurization is aerated before ...

(PDF) Recovery of H2SO4 and NaOH from Na2SO4 by ...
(PDF) Recovery of H2SO4 and NaOH from Na2SO4 by ...

Preparation of sulfuric acid and sodium hydroxide from solutions containing sodium sulfate was studied by the electrodialysis method in a three-chamber (?three-compartment) electrodialyzer ...

Research on the mechanism and reaction conditions of ...
Research on the mechanism and reaction conditions of ...

Sulfate, exists extensively in brackish water, mine ,wastewater, and industrial ,wastewater, with a concentration of around thousands of mg L −1 to tens of thousands of mg L −1. 14 Generally, brackish water is neutral or slightly alkaline. 15 ,Wastewater containing, sulphate, such as the mine ,wastewater,, the effluent of the monosodium glutamate factory, and the ,wastewater, in pharmaceutical industry and food and amino ,acid, industry, is mostly acidic, 16,17 while the dyeing ,wastewater,…

Electrochemical removal of tannins from aqueous solutions ...
Electrochemical removal of tannins from aqueous solutions ...

Gallotannic acid was used as the reference substance. Electrochemical experiments were performed using platinum electrodes. Macroscale potentiostatic or galvanostatic electrolyses were carried out with sodium sulfate or sodium chloride as supporting electrolytes, to …

Electrochemical Treatment of Phenolic Wastewater with ...
Electrochemical Treatment of Phenolic Wastewater with ...

and 30 mL sodium sulfate solution were added to the electrolytic cell, and the two electrodes were kept parallel and immersed vertically in the electrolyte. The two electrodes were stirred magnetically, the DC

(PDF) Recovery of H2SO4 and NaOH from Na2SO4 by ...
(PDF) Recovery of H2SO4 and NaOH from Na2SO4 by ...

Preparation of, sulfuric acid, and sodium hydroxide from solutions containing sodium, sulfate, was studied by the, electrodia,lysis method in a three-chamber (?three-compartment) electrodialyzer ...

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