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Study on the flow back law of fracturing fluid in low permeability oilfield

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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Study on the flow back law of fracturing fluid in low permeability oilfield
Physicochemical and environmental properties of arsenic ...
Physicochemical and environmental properties of arsenic ...

1/7/2020, · The ASSs were precipitated and filtered sludge generated during the treatment of, acidic wastewater, with, sodium sulfide., The collected ASSs were stored and protected from light and oxygen by HDPE film at the companies’ hazardous waste yard for several years. The process flow scheme of arsenic production is shown in Fig. 1.

Uptake of Heavy Metals in Batch Systems by Sulfurized ...
Uptake of Heavy Metals in Batch Systems by Sulfurized ...

Metal ions, which are bounded to the SSAC, could be stripped by acidic solutions (0.2 M HCl) so that SSAC can be recycled. Surface modification of activated carbon using steam pyrolysis in the presence of SO 2 and H 2 S greatly enhanced metal removal and resulted in a product with possible commercial potential for wastewater treatment.

An investigation into the precipitation of copper sulfide ...
An investigation into the precipitation of copper sulfide ...

1/3/2020, · The results of disproportionation tests indicated that reaction parameters, such as temperature, powder contact angle, SO 2 pressure and molar ratio of Cu-to-Sulfur, significantly affected the reaction efficiency, especially the temperature and powder contact angle are the mixed control factor for the metal ,sulfurization,. When the synthetic ,acidic, copper solution (Cu 2+ 10.0 g/L, free sulfuric …

Wastewater treatment | CEST2019
Wastewater treatment | CEST2019

The aim of this paper is to assess the environmental risks associated with the ,wastewater, reuse with respect to six metals; cadmium (Cd), chromium (Cr), copper (Cu), nickel (Ni), lead (Pb) and ,zinc, (Zn) in the city of Dubai. Treated Sewage Effluent (TSE) is used for landscape irrigation.

‘Green’ synthesis of metals and their oxide nanoparticles ...
‘Green’ synthesis of metals and their oxide nanoparticles ...

30/10/2018, · 4-Nitrophenol and its derivatives are used to manufacture herbicides, insecticides, and synthetic dyestuffs, and they can significantly damage the ecosystem as common organic pollutants of ,wastewater,. Due to its toxic and inhibitory nature, 4-nitrophenol is a great environmental concern. Therefore, the reduction of these pollutants is crucial.

Disposal of high-arsenic waste acid by the stepwise ...
Disposal of high-arsenic waste acid by the stepwise ...

High-arsenicwaste acid, a hazardous acid ,wastewater,, is mainly produced by heavy nonferrous (Cu, Pb, Zn, Ni, and Sn, etc.) smelting plant. The high-arsenic waste acid used in this study was obtained from a copper smelting plant equipped with Isa furnace in southwest China. It was produced from the water-

Minerals | Free Full-Text | Strengthening Sulfidation ...
Minerals | Free Full-Text | Strengthening Sulfidation ...

Zinc, oxide ores are first sulfurized with a sulfidizing agent, and then flotation is achieved by using cationic collectors (such as amines) or anion collectors (such as xanthate). The sulfidation process plays a dominant role in the sulfidation–flotation method, and the effect of sulfidation mainly depends on the mineral crystal structure, surface active components, etc [ 8 , 9 ].

Minerals | Free Full-Text | Strengthening Sulfidation ...
Minerals | Free Full-Text | Strengthening Sulfidation ...

Zinc, oxide ores are first sulfurized with a sulfidizing agent, and then flotation is achieved by using cationic collectors (such as amines) or anion collectors (such as xanthate). The sulfidation process plays a dominant role in the sulfidation–flotation method, and the effect of sulfidation mainly depends on the mineral crystal structure, surface active components, etc [ 8 , 9 ].

Synthesis and Characterization of CdTiO 3 @S Composite ...
Synthesis and Characterization of CdTiO 3 @S Composite ...

NaOH (Merck, ≥ 99%) was used as mineralizer and S powder (Merck, ≥ 99%) was utilized as reagents for ,sulfurization,. Crystal violet (CV), C 25 H 30 ClN 3, with molecular weight 407.99 g/mol (Merck) was utilized as a model dye and double distilled water was used as solvent in the preparation of solutions. Synthesis of CdTiO 3 Microparticles

Wastewater treatment | CEST2019
Wastewater treatment | CEST2019

The aim of this paper is to assess the environmental risks associated with the ,wastewater, reuse with respect to six metals; cadmium (Cd), chromium (Cr), copper (Cu), nickel (Ni), lead (Pb) and ,zinc, (Zn) in the city of Dubai. Treated Sewage Effluent (TSE) is used for landscape irrigation.

Uptake of Heavy Metals in Batch Systems by Sulfurized ...
Uptake of Heavy Metals in Batch Systems by Sulfurized ...

Metal ions, which are bounded to the SSAC, could be stripped by acidic solutions (0.2 M HCl) so that SSAC can be recycled. Surface modification of activated carbon using, steam pyrolysis, in the presence of SO 2 and H 2 S greatly enhanced metal removal and resulted in a product with possible commercial potential for wastewater treatment.

Environmental Science & Technology | Vol 55 No 6
Environmental Science & Technology | Vol 55 No 6

Challenges in Measuring the Recovery of SARS-CoV-2 from ,Wastewater,. Rose S. Kantor*, Kara L. Nelson*, ... Production of H 2 S with a Novel Short-Process for the Removal of Heavy Metals in ,Acidic, Effluents from Smelting Flue-Gas Scrubbing Systems. Xiaoming Sun, Leipeng Ji, Wenjun Huang, Zihao Li, Yong Liao, Kai Xiao, Xingrong Zhu, Haomiao Xu,

EP2784166A1 - Method for producing high-purity nickel ...
EP2784166A1 - Method for producing high-purity nickel ...

The method includes treating an acidic solution containing nickel through at least the following steps of: a sulfurization step of adding a sulfurizing agent to the acidic solution containing...

Waste in the Foundry Industry - tandfonline.com
Waste in the Foundry Industry - tandfonline.com

sulfurization, process with calcium car-bide is shown in Figure 3. Waste Characteristics One common practice is to treat the calcium carbide desulfurization slag with water.3 This is done to generate and release acetylene gas from the un-reacted calcium carbide (Equation 2). MAJOR MATERIALS IN CORE AND MOLD MATERIALS: SAND BINDERS ADDITIVE S MELTING MATERIALS:

Subject:
Subject: "hazardous waste" - PubAg Search Results

Specific to strongly ,acidic wastewater,, ... Lead sulfate ,containing, residue is a hazardous waste that should be treated cleanly and efficiently for environment protection and resource sustainability. In this work, a novel reduction-,sulfurization, process using a fluidized bed reactor was investigated for treating lead sulfate ,containing, residue.

Applications of Metal Organic Frameworks in Wastewater ...
Applications of Metal Organic Frameworks in Wastewater ...

MOFs are considered good candidates to be employed in ,wastewater, treatment technologies because of the tunability of their features. The scope of this review article is to provide a comprehensive description of the recent studies published in the literature about the adsorptive and photocatalytic use of MOFs for the removal of organic emerging contaminants from ,wastewater,.

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