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Solvent Extraction of Oil

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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Solvent Extraction of Oil
Effect of Hexavalent Chromium on Performance of Membrane ...
Effect of Hexavalent Chromium on Performance of Membrane ...

The presence of toxic hexavalent chromium poses a great challenge in biological wastewater treatment. In this study, the performance of a membrane bioreactor (MBR) for the treatment of synthetic domestic wastewater in the presence of chromium was investigated.

Hexavalent chromium - Wikipedia
Hexavalent chromium - Wikipedia

There are mainly three types of methods to remediate hexavalent chromium in ground water and drinking water: 1) reduction of toxicity, 2) removal technologies and 3) containment technologies. Reduction of toxicity of hexavalent chromium involves methods using chemicals, microbes and plants.

C8 Surface treatment with chromium trioxide by touchup ...
C8 Surface treatment with chromium trioxide by touchup ...

treatment, to be performed into the glove box avoid any drops on the floor in the workshop. • ,Wastewater containing hexavalent chromium, should not be discharged to surface or groundwater, but treated to effectively remove ,hexavalent chromium, prior to release to the environment or managed as a …

Reduction Monitoring in the Chromium Wastewater Treatment ...
Reduction Monitoring in the Chromium Wastewater Treatment ...

chemical plants contains toxic forms of hexavalent chromium such as chromate and dichromate. The hexavalent chromium in this wastewater must be reduced before the water can be discharged. This requires a two-step process: hexavalent chromium (CR. 6) is reduced to trivalent chromium (CR. 3); and CR. 3. is precipitated as chromium hydroxide. As the oxidation-

[ENV02] Treatment of hexavalent chromium using a galvanic ...
[ENV02] Treatment of hexavalent chromium using a galvanic ...

Treatment, of ,hexavalent chromium, using a galvanic flow cell with different flow configurations Chieng Hui Yap, Norita Mohamed School of Chemical Sciences, Universiti Sains Malaysia, 11800 Penang. E-mail: hui-yap_chieng@agilent.com The conventional way to treat ,wastewater containing, heavy metals is by precipitation with hydroxide.

Removal of hexavalent chromium from wastewater by acid ...
Removal of hexavalent chromium from wastewater by acid ...

This paper deals with the ,treatment, of ,hexavalent chromium, (Cr(VI)) and its removal mechanism using ,acid,-washed zero-valent aluminum (ZVAl). The ,acid,-washed ZVAl before and after reaction was characterized by scanning electron microscope, X-ray diffraction, and X-ray photoelectron spectroscopy. The influence factors such as ZVAl loading, ,acid, washing time, and pH values on Cr(VI) removal were...

C8 Surface treatment with chromium trioxide by touchup ...
C8 Surface treatment with chromium trioxide by touchup ...

treatment, to be performed into the glove box avoid any drops on the floor in the workshop. • ,Wastewater containing hexavalent chromium, should not be discharged to surface or groundwater, but treated to effectively remove ,hexavalent chromium, prior to release to the environment or managed as a …

SOLUTION FOR WASTEWATER PROBLEM RELATED TO …
SOLUTION FOR WASTEWATER PROBLEM RELATED TO …

of SO2 are required to reduce one part of hexavalent chromium as contrasted with 16 parts of copper but the effluent contained sulphites and would not be suitable for discharge without further treatment. Treatment with sulphuric acid Another method is the treatment of wastewater with the addition of sulphuric acid and simultaneous aeration.

The Electrochemical Treatment of Toxic Hexavalent Chromium ...
The Electrochemical Treatment of Toxic Hexavalent Chromium ...

The effect of these parameters on cell voltage and energy consumption has been also studied. It was found that the efficiency of the reduction method is directly proportional to the ,hexavalent chromium, and sulphuric ,acid, concentration. Trivalent ,chromium, is successfully obtained from acidic industrial ,wastewater containing, 1.5 g l-1 Cr6+.

Reduction of Hexavalent Chromium by H2O2 in Acidic ...
Reduction of Hexavalent Chromium by H2O2 in Acidic ...

The rates of Cr(VI) reduction are ,acid,-catalyzed, and the kinetic order z varies from about 1.8−0.5 with ... Integration of ion exchange and electrodeionization as a new approach for the continuous ,treatment of hexavalent chromium wastewater,. Separation and ... Synthesis of ,chromium containing, pigments from ,chromium, galvanic ...

Removal of Hexavalent Chromium-Contaminated Water and ...
Removal of Hexavalent Chromium-Contaminated Water and ...

Study on anaerobic ,treatment, of ,wastewater containing hexavalent chromium, Xu, Y.; Xiao, H.; Sun, S. Absorption of metals by natural polymers generated from seafood processing wastes

Removal of hexavalent chromium from wastewater by acid ...
Removal of hexavalent chromium from wastewater by acid ...

This paper deals with the ,treatment, of ,hexavalent chromium, (Cr(VI)) and its removal mechanism using ,acid,-washed zero-valent aluminum (ZVAl). The ,acid,-washed ZVAl before and after reaction was characterized by scanning electron microscope, X-ray diffraction, and X-ray photoelectron spectroscopy. The influence factors such as ZVAl loading, ,acid, washing time, and pH values on Cr(VI) removal were...

Treatment of hexavalent chromium-containing electroplating ...
Treatment of hexavalent chromium-containing electroplating ...

Hexavalent chromium,-,containing, electroplating ,wastewater, was treated by barium salt precipitation. The effects of pH pre-adjustment of ,wastewater,, cyanide decomposition method, and addition of Cr(VI) precipitator on the removal of ,hexavalent chromium,, total ,chromium,, copper, and nickel were studied. The influence of the dosage of sulfuric ,acid, on the recovery of ,hexavalent chromium, was examined.

Uptake of Hexavalent Chromium in Electroplating Wastewater ...
Uptake of Hexavalent Chromium in Electroplating Wastewater ...

Modified sand adsorbent adsorbed chromium from wastewater for color glass preparation, turning the contaminant into a useful resource. Uptake of Hexavalent Chromium in Electroplating Wastewater by Hydrothermally Treated and Functionalized Sand and Its Sustainable Reutilization for Glass Production | ACS Sustainable Chemistry & Engineering

Chromium Removal from Wastewater by Reverse Osmosis
Chromium Removal from Wastewater by Reverse Osmosis

Hexavalent chromium is classified as a carcinogen. Technical legislation of chromium wastewater treatment is strict from this purpose and is based on the probability of presence hexavalent chromium. With this problem is connected the need of sensitive method for chromium determination. The overview of usable methods for various -[%]

Trevi Environmental Solutions - Chromium reduction
Trevi Environmental Solutions - Chromium reduction

The wastewater which contains hexavalent chromium is then subjected to a chromium reduction, which generates reduced chromium (Cr 3+) wastewater. The latter is further treated with the other wastewater streams in the coagulation-flocculation process. The source-separation of wastewater loaded with hexavalent chromium and other wastewaters reduces chemical costs and allows to build compact …

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