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formic acid producers

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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formic acid producers
Wastewater sterilization: completely new method
Wastewater sterilization: completely new method "vortex ...

The sterilization results of, chromium-containing wastewater, by AVS-100, Neutralization, of acid-base, sterilized,, chromium-containing wastewaters, and metal hydroxide formation was testing at the same installation by using AVS-100. As reagent was used 5-10% lime milk solution. Value of pH process was changing in the range of 7,5-9,0.

CHEMICAL METHODS OF PURIFICATION OF WASTEWATER …
CHEMICAL METHODS OF PURIFICATION OF WASTEWATER …

The main methods of chemical wastewater treatment are neutralization and oxidation. 12.1. Neutralization of waste water . Wastewater containing mineral acids or alkalis is neutralized before being discharged into reservoirs or before being used in technological processes. Virtually neutral are considered to be water having a pH of 6.5 ... 8.5.

Alternative Method for the Treatment of Hydrometallurgical ...
Alternative Method for the Treatment of Hydrometallurgical ...

Wastewater treatment, sludge from a primary lead-zinc smelter is characterized as hazardous waste and requires ,treatment, prior to disposal due to its significant ,arsenic, and heavy metals contents. This study presents a method for the stabilization of ,arsenic, sludge that uses a slag based curing agent composed of smelting slag, cement clinker and limestone.

METHOD OF TREATING STRONGLY ACID WASTEWATER CONTAINING ...
METHOD OF TREATING STRONGLY ACID WASTEWATER CONTAINING ...

The method of treating strongly ,acid wastewater containing, toxic substances of the present invention is suitable for the removal of fluorine, boron, copper, lead, ,arsenic,, cadmium, hexavalent chromium, manganese, selenium, etc. from strongly ,acid wastewater, discharged from glass factories, liquid-crystal factories, plating factories, semiconductor factories, iron-mining factories, nonferrous ...

METHOD OF TREATING STRONGLY ACID WASTEWATER …
METHOD OF TREATING STRONGLY ACID WASTEWATER …

The method of treating strongly ,acid wastewater containing, toxic substances of the present invention is suitable for the removal of fluorine, boron, copper, lead, ,arsenic,, cadmium, hexavalent chromium, manganese, selenium, etc. from strongly ,acid wastewater, discharged from glass factories, liquid-crystal factories, plating factories, semiconductor factories, iron-mining factories, nonferrous ...

14 Industrial Wastewater Treatment Principals and Ideas
14 Industrial Wastewater Treatment Principals and Ideas

Generally, alkaline mercury-containing wastewater is usually treated by chemical coacervation or sulfide precipitation; acidic mercury-containing wastewater can be treated by metal reduction; low-concentration mercury-containing wastewater can be treated by activated carbon adsorption, chemical coacervation or activated sludge; organic mercury wastewater is difficult to treat and is usually first oxidized to …

Alternative Method for the Treatment of Hydrometallurgical ...
Alternative Method for the Treatment of Hydrometallurgical ...

Wastewater treatment, sludge from a primary lead-zinc smelter is characterized as hazardous waste and requires ,treatment, prior to disposal due to its significant ,arsenic, and heavy metals contents. This study presents a method for the stabilization of ,arsenic, sludge that uses a slag based curing agent composed of smelting slag, cement clinker and limestone.

(PDF) Research progress of arsenic removal from wastewater
(PDF) Research progress of arsenic removal from wastewater

Arsenic-containing wastewater (100.0 mg/L) was treated by oxidation-flocculation process with ferrate, and the effects of Fe/As mass ratio, pH value, temperature and reaction time on removal rate...

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

The present treatment process for arsenic removal from high-arsenic waste acid mainly are composes of calcium carbonate neutralization (Stage I) and scorodite precipitation (Stage II). In the Stage-I for calcium carbonate neutralization, temperatures ranged from 25 to 65 °C is available for the precipitation of sulfate radical in the form of gypsum.

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

arsenic, waste ,acid, will cause serious ,arsenic, pollution as well as widely safety and environmental concern.6,7 ,Neutralization, and sulfurization processes are typical processes to treat the high-,arsenic, waste ,acid,.1,3 In ,neutraliza-tion, process, ,arsenic, in the waste ,acid, is transformed into solid hazardous waste composed of calcium arsenate/arsenite,

Efficient removal of arsenic from “dirty acid” wastewater ...
Efficient removal of arsenic from “dirty acid” wastewater ...

Traditional arsenic precipitation methods include lime neutralization, co-precipitation with ferric ions and sulfide precipitation [3, 12,13]. However, they all have shortages as for applying them...

Hydrothermal Treatment of Arsenic Sulfide Residues from ...
Hydrothermal Treatment of Arsenic Sulfide Residues from ...

At present, there are many treatment methods for arsenic-containing wastewater, such as precipitation, adsorption, and biological methods [10,11,12,13,14]. However, such wastewater is usually treated with, sodium sulfide, sodium hydrosulfide, or, hydrogen sulfide, to precipitate arsenic, and the deposition of arsenic sulfide residue (ASR) is then engendered [ 15 , 16 ].

(PDF) Research progress of arsenic removal from wastewater
(PDF) Research progress of arsenic removal from wastewater

The, wastewater discharged, from metallurgical and chemical industries often contains, toxic heavy, metal element, arsenic., If the, wastewater discharged, directly without treatment, it will cause serious...

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

The present treatment process for arsenic removal from high-arsenic waste acid mainly are composes of, calcium carbonate neutralization (Stage, I) and scorodite precipitation (Stage II). In the Stage-I for, calci,um, carbonate, neutralization, temperatures ranged from 25 to 65 °C is available for the precipitation of sulfate radical in the form of gypsum.

ADSORPTION AND NEUTRALIZATION OF ACID WASTEWATER ...
ADSORPTION AND NEUTRALIZATION OF ACID WASTEWATER ...

The process and mechanism of the adsorption and ,neutralization, of acidic ,wastewater containing, Ni(Ⅱ) by steel slag,the solid waste produced from steelmaking industry were studied in detail.The results showed that after 8 min adsorption ,treatment, at(25 ℃),the concentration of Ni(Ⅱ) in acidic ,wastewater, was reduced from the initial(200 mg/L) to(0.25 mg/L) and effluent pH was increased from ...

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