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Fracturing fluid flowback duration

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 fluid flowback duration
Nano/submicrometer-emulsion oily wastewater treatment ...
Nano/submicrometer-emulsion oily wastewater treatment ...

The above results indicate that wood-,PVA, is tolerant enough for a wide pH range. The purification performance of wood-,PVA,-CNT toward ,acid,-base-corrosion oily water was further investigated. Tween 80-stabilized silicone oil-in-water nano/submicrometer emulsions with different pH values were considered as examples.

Removal of nitrogen in wastewater by polyvinyl alcohol ...
Removal of nitrogen in wastewater by polyvinyl alcohol ...

Removal of nitrogen in ,wastewater, by ,polyvinyl alcohol, (,PVA,)-immobilization ... were hardened in the solution of boric ,acid, and 1% calcium chloride. The subsequent spherical beads in 3-7mm diameter were washed with distilled water, and adapted with a synthetic ,wastewater, before

Reactive toughening of polyvinyl alcohol hydrogel and its ...
Reactive toughening of polyvinyl alcohol hydrogel and its ...

In order to improve the hydraulic impact resistance of a ,polyvinyl alcohol, (,PVA,) hydrogel as a microorganism immobilization material and meet the requirements of long-time aeration of sewage treatment, toughened ,PVA, hydrogel beads were prepared by co-crosslinking with glycerol through the boric ,acid, (H3BO3) – chemical crosslinking method. It was found that glycerol could increase the ...

Cell immobilization using PVA crosslinked with boric acid ...
Cell immobilization using PVA crosslinked with boric acid ...

Abstract. A new cell immobilization technique is described in which ,polyvinyl alcohol, is crosslinked with boric ,acid,, with the addition of a small amount of calcium alginate. The presence of the calcium alginate improves the surface properties of the beads, preventing agglomeration. A pure culture of phenol‐degrading Pseudomonas was immobilized in ...

Nano/submicrometer-emulsion oily wastewater treatment ...
Nano/submicrometer-emulsion oily wastewater treatment ...

The above results indicate that wood-,PVA, is tolerant enough for a wide pH range. The purification performance of wood-,PVA,-CNT toward ,acid,-base-corrosion oily water was further investigated. Tween 80-stabilized silicone oil-in-water nano/submicrometer emulsions with different pH values were considered as examples.

POLYVINYL ALCOHOL (PVA)
POLYVINYL ALCOHOL (PVA)

Polyvinyl alcohol for food use is an odourless and tasteless, translucent, white or cream colored granular powder. It is soluble in water, slightly soluble in ethanol, but insoluble in other organic solvents. Typically a 5% solution of polyvinyl alcohol exhibits a pH in the range of 5.0 to 6.5. Polyvinyl alcohol has a melting point of 180 to 190°C.

Pervaporation separation of water–acetic acid mixtures ...
Pervaporation separation of water–acetic acid mixtures ...

operations, ,wastewater, is almost always contaminated with acetic ,acid,, the separation of which is dif” cult by conventional distillation methods because of their close relative volatility. ... were produced by reacting ,PVA, with maleic ,acid, in a solution containing 50 vol%

Removal of nitrogen in wastewater by polyvinyl alcohol ...
Removal of nitrogen in wastewater by polyvinyl alcohol ...

Removal of nitrogen in ,wastewater, by ,polyvinyl alcohol, (,PVA,)-immobilization ... were hardened in the solution of boric ,acid, and 1% calcium chloride. The subsequent spherical beads in 3-7mm diameter were washed with distilled water, and adapted with a synthetic ,wastewater, before

Improvement of biodegradability of PVA-containing ...
Improvement of biodegradability of PVA-containing ...

Read "Improvement of biodegradability of ,PVA,-containing ,wastewater, by ionizing radiation pretreatment, Environmental Science and Pollution Research" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

Synthesis and characterization of Cu(OH) 2 -NWs-PVA-AC ...
Synthesis and characterization of Cu(OH) 2 -NWs-PVA-AC ...

11/3/2021, · From these results, it can be also determined that Cu(OH) 2-NWs-,PVA,-AC composite can be deliberated as the promising adsorbent for the removal of MB from ,wastewater, 50,51,52,53,54,55,56.

PVA-PAA HYDROGEL MICRO-CARRIER FOR THE IMPROVEMENT …
PVA-PAA HYDROGEL MICRO-CARRIER FOR THE IMPROVEMENT …

experiments the ,PVA,-PAA hydrogel synthesized with embedded starch granules was most suitable for the ,wastewater, technology requirements. ,PVA,-PAA hydrogel micro-carriers with an average diameter of 150-400 µm were tested in laboratory scale ,wastewater, technology experiments. The bacterial culture was colonized on the surface

Capturing Cd2+ ions from wastewater using PVA/[small alpha ...
Capturing Cd2+ ions from wastewater using PVA/[small alpha ...

Capturing Cd2+ ions from ,wastewater, using ,PVA,/[small alpha]-MnO2-Oleic ,acid, nanocomposites. ... nanocomposites (,PVA, NCs) filled with modified α-MnO2 nanorods (NRs) were fabricated through the sonochemical method, which is a fast, economical, and eco-friendly method. ... oleic ,acid, ; nanorods ...

Synthesis and characterization of Cu(OH) 2 -NWs-PVA-AC ...
Synthesis and characterization of Cu(OH) 2 -NWs-PVA-AC ...

11/3/2021, · From these results, it can be also determined that Cu(OH) 2-NWs-,PVA,-AC composite can be deliberated as the promising adsorbent for the removal of MB from ,wastewater, 50,51,52,53,54,55,56.

Capturing Cd2+ ions from wastewater using PVA/[small alpha ...
Capturing Cd2+ ions from wastewater using PVA/[small alpha ...

Capturing Cd2+ ions from ,wastewater, using ,PVA,/[small alpha]-MnO2-Oleic ,acid, nanocomposites. ... nanocomposites (,PVA, NCs) filled with modified α-MnO2 nanorods (NRs) were fabricated through the sonochemical method, which is a fast, economical, and eco-friendly method. ... oleic ,acid, ; nanorods ...

Improvement of biodegradability of PVA-containing ...
Improvement of biodegradability of PVA-containing ...

Read "Improvement of biodegradability of ,PVA,-containing ,wastewater, by ionizing radiation pretreatment, Environmental Science and Pollution Research" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

Multifunctional application of PVA-aided Zn–Fe–Mn coupled ...
Multifunctional application of PVA-aided Zn–Fe–Mn coupled ...

2/1/2021, · Zinc oxide (ZnO) is a fascinating semiconductor material with many applications such as adsorption, photocatalysis, sensor, and antibacterial activities. By using a poly (vinyl alcohol) (,PVA,) polymer as a capping agent and metal oxides (iron and manganese) as a couple, the porous ,PVA,-aided Zn/Fe/Mn ternary oxide nanocomposite material (PTMO-NCM) was synthesized. The thermal, optical ...

PVA-PAA HYDROGEL MICRO-CARRIER FOR THE IMPROVEMENT …
PVA-PAA HYDROGEL MICRO-CARRIER FOR THE IMPROVEMENT …

experiments the ,PVA,-PAA hydrogel synthesized with embedded starch granules was most suitable for the ,wastewater, technology requirements. ,PVA,-PAA hydrogel micro-carriers with an average diameter of 150-400 µm were tested in laboratory scale ,wastewater, technology experiments. The bacterial culture was colonized on the surface

Removal of nitrogen in wastewater by polyvinyl alcohol ...
Removal of nitrogen in wastewater by polyvinyl alcohol ...

Removal of nitrogen in ,wastewater, by ,polyvinyl alcohol, (,PVA,)-immobilization ... were hardened in the solution of boric ,acid, and 1% calcium chloride. The subsequent spherical beads in 3-7mm diameter were washed with distilled water, and adapted with a synthetic ,wastewater, before

Study of PVA-based nanocomposite polymer gels containing ...
Study of PVA-based nanocomposite polymer gels containing ...

Maximum room-temperature conductivities of 2·12 × 10 −3, 7·3 × 10 −4 and 5·8 × 10 −4 S/cm have been obtained for nanocomposite gel electrolytes containing DMSO + 1 M OA, MA and SA + 10 wt% ,PVA, at 6 wt% silica, respectively.

Function Synergy of Cross-Linked Cationic PVA Polymer to ...
Function Synergy of Cross-Linked Cationic PVA Polymer to ...

Thus, a cationic ,polyvinyl alcohol, (,PVA,) polymer, modified by glyoxal and boric ,acid,, was discovered due to its excellence in associating with the FLA A additive for controlling the free cement-based material water amount and preventing the chelating effect of FLA …

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