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Application of fracturing flowback fluid recovery technology

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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Application of fracturing flowback fluid recovery technology
Microbial induced solidification and stabilization of ...
Microbial induced solidification and stabilization of ...

17/10/2019, · Moreover, S. pasteurii ,can, survive from high alkalinity and heavy metal toxicity of fly ash solution. Further, the unconfined compressive strength (UCS) of MICP ,treated, fly ashes A and B reached 0.385MPa and 0.709 MPa, respectively. The MICP treatment also resulted in a reduction in the leaching toxicity of heavy metals, especially for Cu, Pb and Hg.

(PDF) Effect of speciation and composition on the kinetics ...
(PDF) Effect of speciation and composition on the kinetics ...

Precipitation, of arsenic as As2S3 produces little ,waste, sludge, has the potential for low chemical consumption and for selective metal ... Effect of speciation and composition on the kinetics and ,precipitation, of arsenic ,sulfide, from industrial metallurgical wastewater. …

Ferrous and sulfide treatment of electroplating wastewater ...
Ferrous and sulfide treatment of electroplating wastewater ...

The wastewater is first adjusted to a pH of from about 8 to 10 and then treated with sodium sulfide to provide sulfide ions to effect precipitation of heavy metal contaminants followed by treatment with ferrous sulfate or ferrous chloride to provide ferrous ions to chemically reduce the hexavalent chromium to its trivalent state.

US Patent for Ferrous and sulfide treatment of ...
US Patent for Ferrous and sulfide treatment of ...

The present invention involves a treatment technique for drastically reducing the volume of hazardous sludge generated by the chemical reduction of chromium contaminants and the ,precipitation, of heavy metal contaminants from contaminated electroplating wastewater. The wastewater is first adjusted to a pH of from about 8 to 10 and then ,treated, with ,sodium sulfide, to provide ,sulfide, ions to ...

Ferrous and sulfide treatment of electroplating wastewater ...
Ferrous and sulfide treatment of electroplating wastewater ...

The wastewater is first adjusted to a pH of from about 8 to 10 and then treated with sodium sulfide to provide sulfide ions to effect precipitation of heavy metal contaminants followed by treatment with ferrous sulfate or ferrous chloride to provide ferrous ions to chemically reduce the hexavalent chromium to its trivalent state.

The Dissolution/Leaching Behavior of Metal Hydroxide/Metal ...
The Dissolution/Leaching Behavior of Metal Hydroxide/Metal ...

The chemical ,precipitation, involves either hydroxide, carbonate, The most or ,sulfide, treatment, or some combination of these treatments. commonly used ,precipitation, technique involves hydroxide treatment due to its relative simplicity, low cost of precipitant (lime), and ease of automatic pH ,Sulfide precipitation, has also been demonstrated to be an effective control. alternative to hydroxide ...

The method of treatment of water solutions containing ...
The method of treatment of water solutions containing ...

The invention relates to a method for treatment of aqueous solutions containing hydrogen ,sulfide,, hydrogen cyanide and ammonia in bound or free form. During coking and gasification of coals formed condensate and ,waste water, in which are dissolved a significant …

Minerals | Free Full-Text | Release Behaviors of Arsenic ...
Minerals | Free Full-Text | Release Behaviors of Arsenic ...

Therefore, precipitation employing sulfide as a precipitant via sodium sulfide or hydrogen sulfide, which generates As 2 S 3 precipitate with a higher purity and at a much lower amount compared to the sludge generated by neutralization or co-precipitation, has become a potential treatment technology for strongly acidic wastewater, to realize the recycling of metals and minimize the amount of arsenic waste .

(PDF) 2010 A review of metal sulphide precipitation ...
(PDF) 2010 A review of metal sulphide precipitation ...

Although there have been numerous studies on metal sulphide ,precipitation,, the research field as a whole is not well integrated. This paper reviews the disparate areas of study into metal sulphide ,precipitation, in an attempt to summarise the current

Wastewater treatment method of PCB circuit board factory ...
Wastewater treatment method of PCB circuit board factory ...

The emulsified waste liquid in PCB wastewater was acidified with sulfuric acid to pH = 2 for demulsification and oil separation treatment, and then lime milk was used for coagulation and ...

US2645561A - Sodium sulfate recovery - Google Patents
US2645561A - Sodium sulfate recovery - Google Patents

In general, the quantity of sulfuric ,acid, added to the mother liquor of the anhydrous ,sodium, sulfate solids should be sufficient to precipitate one or more ,acid, sulfates of ,sodium,. By the ,precipitation, of such ,acid, sulfates of ,sodium,, the substantially complete removal of the anhydrous ,sodium, sulfate is assured.

Minerals | Free Full-Text | Release Behaviors of Arsenic ...
Minerals | Free Full-Text | Release Behaviors of Arsenic ...

Therefore, precipitation employing sulfide as a precipitant via sodium sulfide or hydrogen sulfide, which generates As 2 S 3 precipitate with a higher purity and at a much lower amount compared to the sludge generated by neutralization or co-precipitation, has become a potential treatment technology for strongly acidic wastewater, to realize the recycling of metals and minimize the amount of arsenic waste .

Process for the purification of acidic metal-bearing waste ...
Process for the purification of acidic metal-bearing waste ...

Also, they found that dissolved sulfite (SO 2 2−) present in the water consumed some of the sulfide, thus reducing the amount of sulfide available for precipitation. Previous processes, as described in many patents and publications, have attempted to remove metals from acidic waste streams to minimize the environmental impact of the wastewater release.

US Patent for Ferrous and sulfide treatment of ...
US Patent for Ferrous and sulfide treatment of ...

The present invention involves a treatment technique for drastically reducing the volume of hazardous sludge generated by the chemical reduction of chromium contaminants and the ,precipitation, of heavy metal contaminants from contaminated electroplating wastewater. The wastewater is first adjusted to a pH of from about 8 to 10 and then ,treated, with ,sodium sulfide, to provide ,sulfide, ions to ...

Silver extraction from waste hypo/fixer solution page 6
Silver extraction from waste hypo/fixer solution page 6

SODIUM sulfide, is added to the solution of ,sodium, thiosulphate [affil. link to info/product on Amazon]. The reaction is: Ag2S2O3, 2Na2S2O2+Na2S = Ag2S+3Na2S2O3 The silver is precipitated as silver ,sulfide,. The silver ,sulfide, settles to the bottom of the container in which the reaction occurs. Silver ,sulfide can, be purchased or produced for use.

Wastewater treatment for tin plating
Wastewater treatment for tin plating

The recommended treatment will depend somewhat upon your discharge limits. Hydroxide ,precipitation, at a pH of 9-9.5, followed by flocculation, clarification, and a final polishing filter should meet normal limits, but, if you have an exceptionally low limit for lead, copper or nickel, etc., then a different approach may be required. Lyle Kirman

(PDF) Effect of speciation and composition on the kinetics ...
(PDF) Effect of speciation and composition on the kinetics ...

Precipitation, of arsenic as As2S3 produces little ,waste, sludge, has the potential for low chemical consumption and for selective metal ... Effect of speciation and composition on the kinetics and ,precipitation, of arsenic ,sulfide, from industrial metallurgical wastewater. …

(PDF) Effect of speciation and composition on the kinetics ...
(PDF) Effect of speciation and composition on the kinetics ...

Precipitation, of arsenic as As2S3 produces little ,waste, sludge, has the potential for low chemical consumption and for selective metal ... Effect of speciation and composition on the kinetics and ,precipitation, of arsenic ,sulfide, from industrial metallurgical wastewater. …

US Patent for Hydrogen sulfide removal Patent (Patent ...
US Patent for Hydrogen sulfide removal Patent (Patent ...

A process for the removal and conversion into sulfur of hydrogen ,sulfide, in a gaseous or liquid material which comprises essentially treating the said material with an oxidative lignin prepared by treating lignins with oxidizing agents, nitrating agents and/or demethylating agents and, if desired, introducing hydrophilic groups into the resultant product.

Caustic sulfide wet oxidation process - MyScienceWork
Caustic sulfide wet oxidation process - MyScienceWork

A process for treatment of caustic ,sulfide, liquor by wet oxidation in a nickel-based alloy system is described in which the liquor is first analyzed for alkalinity …

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