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Study on treatment technology of fracturing flowback fluid

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 treatment technology of fracturing flowback fluid
apam anionic polyacrylamide as thickening agent mc ...
apam anionic polyacrylamide as thickening agent mc ...

The Anionic Polyacrylamide (APAM) is suitable in the treatment of the weakly ,acidic, to ,alkaline waste water, in the industries such as the chemical industry, the foodstuff industry, the dyeing processing, the fiber production and the metal processing etc. Free Inquiry

Preparation application and mechanism of starch modified ...
Preparation application and mechanism of starch modified ...

Under the ,alkaline, condition, at 19 °C a total of 5 g of dry pulp and filler that accounted for 20% of the dry pulp were poured into the DFR-05 dynamic water filter, and the speed of the mixing chamber was adjusted to 700 rpm for 10 s. Then, a certain amount of MDDF was added, and the speed was adjusted to 800 rpm for 20 s.

118037re - MDPI
118037re - MDPI

Melamine is produced by the thermal condensation of ,dicyandiamide, at ... and cyanuric acid by hydrolysis under ,acidic, conditions [5,6]. The dissociation constants pKa are 5.0 for melamine, 4.5 and 9.4 for ammeline, 1.8, 6.9, and 13.5 for ammelide, and 6.9 for cyanuric acid. ,Alkaline, hydrolysis of melamine produces ammeline and ...

Diversity Physiology and Niche Differentiation of ...
Diversity Physiology and Niche Differentiation of ...

DIVERSITY OF AMMONIA-OXIDIZING ARCHAEA. Shortly after these insights from metagenomics, the isolation of the first ammonia-oxidizing archaeon (AOA), Nitrosopumilus maritimus SMC1 of the until then enigmatic group I.1a archaea, was reported ().Members of this lineage are ubiquitously distributed in open ocean and coastal waters and have been demonstrated to represent 20% to 30% of marine ...

Study of the modification mechanism of heavy metal ions ...
Study of the modification mechanism of heavy metal ions ...

This is due to the following reasons: first, the surface of the activated carbon is oxidized by nitric acid, resulting in the formation of a large number of weak ,acidic, carboxyl groups 33 and some –NO 2 groups. These ,acidic, groups are capable of the acid–base neutralization of ,dicyandiamide, during …

Nitrogen | Free Full-Text | Comparative Effectiveness of ...
Nitrogen | Free Full-Text | Comparative Effectiveness of ...

13/4/2021, · This study investigates the effectiveness of four NIs, namely, ,dicyandiamide, (DCD), 3, 4-dimethylpyrazole phosphate (DMPP), nitrogenous mineral fertilizers containing the DMPP ammonium stabilizer (ENTEC) and active ingredients: 3.00–3.25% 1, 2, 4-triazole and 1.50–1.65% 3-methylpyrazole (PIADIN) under three vastly different textured soils (clayey, loamy and sandy).

Study of the modification mechanism of heavy metal ions ...
Study of the modification mechanism of heavy metal ions ...

This is due to the following reasons: first, the surface of the activated carbon is oxidized by nitric acid, resulting in the formation of a large number of weak ,acidic, carboxyl groups 33 and some –NO 2 groups. These ,acidic, groups are capable of the acid–base neutralization of ,dicyandiamide, during …

118037re - MDPI
118037re - MDPI

Melamine is produced by the thermal condensation of ,dicyandiamide, at ... and cyanuric acid by hydrolysis under ,acidic, conditions [5,6]. The dissociation constants pKa are 5.0 for melamine, 4.5 and 9.4 for ammeline, 1.8, 6.9, and 13.5 for ammelide, and 6.9 for cyanuric acid. ,Alkaline, hydrolysis of melamine produces ammeline and ...

Frontiers | Controls and Adaptive Management of ...
Frontiers | Controls and Adaptive Management of ...

Several nitrification inhibitors that are widely used in agriculture include: (1) 2-chloro-6-(trichloromethyl) pyridine (nitrapyrin), (2) ,dicyandiamide, (DCD), and (3) 3,4-dimethylepyrazole phosphate (DMPP). Urease inhibitors, such as N-(n-butyl) thiophosphoric triamide (NBPT), …

Nitrogen | Free Full-Text | Comparative Effectiveness of ...
Nitrogen | Free Full-Text | Comparative Effectiveness of ...

13/4/2021, · This study investigates the effectiveness of four NIs, namely, ,dicyandiamide, (DCD), 3, 4-dimethylpyrazole phosphate (DMPP), nitrogenous mineral fertilizers containing the DMPP ammonium stabilizer (ENTEC) and active ingredients: 3.00–3.25% 1, 2, 4-triazole and 1.50–1.65% 3-methylpyrazole (PIADIN) under three vastly different textured soils (clayey, loamy and sandy).

Decolorant Polymer Color Remover for Effluent Water ...
Decolorant Polymer Color Remover for Effluent Water ...

Buy the high quality and highly effective ,decolorant polymer color remover for effluent water treatment, with reasonable price from Cleanwater Chemicals. Our factory has advanced technology and equipment at your service. Should you are interested in it, welcome to get the free sample from us.

Discriminating Catalytically Active FeNx Species of ...
Discriminating Catalytically Active FeNx Species of ...

Nanostructured Fe–N–C materials represent a new type of “platinum-like” non-noble-metal catalyst for various electrochemical reactions and organic transformations. However, no consensus has been reached on the active sites of the Fe–N–C catalysts because of …

Ping Ma | Scientific.Net
Ping Ma | Scientific.Net

And the influencing factors mainly include flocculant dosage, pH and temperature. The experimental results show that when the dicyandiamide formaldehyde flocculant dosage is 8mL / L and pH is acidic or neutral, COD and color removal rate are the highest that have reached more than 70%.

Ping Ma | Scientific.Net
Ping Ma | Scientific.Net

And the influencing factors mainly include flocculant dosage, pH and temperature. The experimental results show that when the dicyandiamide formaldehyde flocculant dosage is 8mL / L and pH is acidic or neutral, COD and color removal rate are the highest that have reached more than 70%.

Preparation application and mechanism of starch modified ...
Preparation application and mechanism of starch modified ...

Under the ,alkaline, condition, at 19 °C a total of 5 g of dry pulp and filler that accounted for 20% of the dry pulp were poured into the DFR-05 dynamic water filter, and the speed of the mixing chamber was adjusted to 700 rpm for 10 s. Then, a certain amount of MDDF was added, and the speed was adjusted to 800 rpm for 20 s.

Frontiers | Controls and Adaptive Management of ...
Frontiers | Controls and Adaptive Management of ...

Several nitrification inhibitors that are widely used in agriculture include: (1) 2-chloro-6-(trichloromethyl) pyridine (nitrapyrin), (2) ,dicyandiamide, (DCD), and (3) 3,4-dimethylepyrazole phosphate (DMPP). Urease inhibitors, such as N-(n-butyl) thiophosphoric triamide (NBPT), …

Mini Review on the Structure and Properties ...
Mini Review on the Structure and Properties ...

29/11/2018, · In addition, g-C 3 N 4 has the ability to resist attacks from heat, strong acid, and strong ,alkaline, solution . g-C 3 N 4 has a unique ability to be simply prepared by thermally polycondensing the cheap N-rich precursors, such as dicyanamide, cyanamide, melamine, melamine cyanurate, and urea, and this is unlike the other metal-containing photocatalysts that require costly metal salts for ...

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