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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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rsd waste bin
What acid to use for adjusting wastewater pH?
What acid to use for adjusting wastewater pH?

I have digested 0.5 g of sample in HNO³ and diluted upto ,100 ml,. After analysis on AAS the answer is 0.192 ppm. Now How to calculate the actual conc. of Cu in the actual sample?

Method of extracting rare-earth metals (rem) from ...
Method of extracting rare-earth metals (rem) from ...

In the course of opening with one solution of sulphuric ,acid, successively processed are 1-3 lots of phosphogypsum with heating, the ,water, phase is separated by filtration, the sediment is washed with ,water,, apatite is added to the filtrate in a ratio of S:L=1:10-20, with the second heating at a temperature of 50-70°C and mixing for 1-2 hours with neutralisation with sulphuric ,acid, to a ...

Articles
Articles

Claim2: the method for producing purified ,sodium sulfide, from a ,sodium, hydrosulfide liquor containing (a) at least one metallic impurity of the group consisting of iron, copper, nickel, manganese, and silicon, and (b) an amount of available carbonate of ,sodium, equivalent to more than 0.06% by weight of CO3 radical, which method comprises treating said liquor with an alkaline earth compound so ...

High efficiency removal of Pb( ii ) in aqueous solution by ...
High efficiency removal of Pb( ii ) in aqueous solution by ...

First published on 4th January 2021. A biochar-supported nanoscale ferrous ,sulfide, composite was prepared and applied for the treatment of Pb(II) ions in aqueous solution.The experimental results of SEM, EDS, XRD, and FT-IR spectroscopy clearly implied that the biochar was successfully modified with nanoscale ferrous ,sulfide, composite.

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 …

Nano Sized Sulfide Compounds Of Cerium And A Process For The
Nano Sized Sulfide Compounds Of Cerium And A Process For The

The present invention relates to nano sized ,sulfide, compounds of cerium and a process for the preparation thereof. More particularly, the present invention provides novel nano sized particles of cerium ,sulfide, as well as a novel process for the preparation of nano sized ,sulfide, compounds of cerium by the bioreduction of cerium sulfate or cerium acetate, without resorting to chemical methods.

Using a pH Meter to Test Wastewater - from Cole-Parmer Blog
Using a pH Meter to Test Wastewater - from Cole-Parmer Blog

14/11/2013, · 1. We recommend a 2-point calibration with a ,pH, 4 and a ,pH, 7 buffer solution for more acidic waste and a ,pH, 7 and a ,pH, 10 buffer solution for more basic waste. The electrode slope should be between 92 and 102%. 2. Just before testing, use a graduated cylinder to measure 60 ,mL, of the ,wastewater, sample into a ,100 mL, beaker. Stir the sample.

Determination of Organic Acids in Wastewater Using Ion ...
Determination of Organic Acids in Wastewater Using Ion ...

Add ~50 ,mL, DI water to a ,100 mL, volumetric flask and add the appropriate volume of concentrated standard solution into the volumetric flask (Table 1). Bring to volume with DI water. Perform this preparation in a fume hood. Calibration Standard Solutions Dilute 0.1, 0.2, 0.3, and 0.4 ,mL, of mixed stock standard solution in ,100 mL, volumetric flasks with DI water for

Influence of Wastewater PH on Turbidity
Influence of Wastewater PH on Turbidity

Influence of ,Wastewater PH, on Turbidity Harashit Kumar Mandal ... ,acid, or alkaline condition of water. Several factors like temperature, ... in a ,100 ml, volumetric flask and leaved it undisturbed for one full day at 250C. Make up to ,100, for one month from the stock solution is 400.

Sulfidation of Iron-Based Materials: A Review of Processes ...
Sulfidation of Iron-Based Materials: A Review of Processes ...

Iron-based materials used in ,water, treatment and groundwater remediation—especially micro- and nanosized zerovalent iron (nZVI)—,can, be more effective when modified with lower-valent forms of sulfur (i.e., “sulfidated”). Controlled sulfidation for this purpose (using ,sulfide,, dithionite, etc.) is the main topic of this review, but insights are derived by comparison with related and ...

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.

THE YELLOW CHROME PIGMENT FROM ELECTROPLATING …
THE YELLOW CHROME PIGMENT FROM ELECTROPLATING …

of ,sodium, monoxide are emitted when this compound is heated to decomposition. Strontium chromate is soluble in cold and hot ,water,, hydrochloric ,acid,, nitric ,acid,, acetic ,acid,, and ammonium salts. Zinc chromate is insoluble in cold ,water, and acetone, dissolves in hot ,water,, and is soluble ,in acid, …

Testing the pH of Wastewater Samples from Cole-Parmer
Testing the pH of Wastewater Samples from Cole-Parmer

15/10/2018, · 1. We recommend a 2-point calibration with a ,pH, 4 and a ,pH, 7 buffer solution for more acidic waste and a ,pH, 7 and a ,pH, 10 buffer solution for more basic waste. The electrode slope should be between 92 and 102%. 2. Just before testing, use a graduated cylinder to measure 60 ,mL, of the ,wastewater, sample into a ,100 mL, beaker. Stir the sample.

Recovery of manganese and zinc from spent Zn-C and ...
Recovery of manganese and zinc from spent Zn-C and ...

It is possible to isolate the main metals present in the leachates by a sequential ,precipitation, procedure under controlled pH: (i) free acidity 1.1 mol L-1 - Hg, Cd, Pb and most Fe were precipitated by adding ,sodium sulfide,; (ii) pH between 1.5-2.0 - Zn (and traces of Fe) was precipitated by adding ,sodium sulfide,; (iii) pH near 7 - Mn ,can, be precipitated after adding ,sodium, hydroxide and ...

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

Caustic ,sulfide, wet oxidation process. 0513454 - EP91308493B1 - EPO Application Sep 18, 1991 - Publication Dec 27, 1996 Joseph A. Momont David A. Beula William M. Copa.

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