No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
1. Introduction. Barium sulfate (BaSO 4) nanoparticles have attracted much attention for their extensively application as filling materials and as additive in paints, plastics, rubbers, cosmetics, and contrast agents in medicine due to the excellent physical and chemical properties [1], [2], [3].The good dispersion and narrow particle size distribution (PSD) are key …
The primary agents responsible for crystallization fouling are the carbonates and sulfates of calcium or magnesium, barium salts, silicate, and phosphate. Scaling is essentially linked to the formation of calcium carbonate (CaCO 3). Scaling may contain other residues such as algae, calcium sulfate, clays, and the brucite Mg (OH) 2. But it is ...
Aims of this study to synthesize barium sulfate (BaSO4) from natrium sulfate and barium chloride with the modification of the mixing speed, temperature and additive concentration variations.
Carbonate (calcium), sulfide (iron, zinc), and sulfate (calcium, barium, strontium) scales are more common in oilfield applications. The scale formation depends on several …
problem in the processing equipment of many industries. For instance, formation of barium sulfate crystals in offshore oil and gas production lead to a decrease in heat transfer rate and increasing operating cost. Therefore, inhibiting barium sulfate scales has economic impact9,10. Nano sized barium sulfate production
In this work, an effort has been made to inhibit crystal growth with varying the concentration of the stock solution (3500, 4000, 4500, 5000 ppm Ba2+), flow rate (40 ml/min) and temperature (50°C).
Three different kinds of morphology with various sizes of barium sulfate particles were produced by reactive precipitation in a Taylor-Couette flow reactor. It is found that particle morphology transition is strongly related to the …
The invention provides a process for the sequestration of barium sulfate scale and barium sulfate sequestrant compositions therefor comprising an aqueous solution of ...
Barium is a controversial metal irrespective of its use in PVC stabilization.; On one hand, barium having density of 3.51 g/cc is considered as a heavy metal, under very few of the heavy metal definitions.; On the other hand, BaCl2 formed during processing is classified as toxic, as against CaCl2.; Density of metals used in stabilizers for PVC is: Lead-11.34, Cd-8.65, Zn-7.14, Ba …
In this paper, CCQDs were firstly used to adjust the morphology of BaSO 4 and succeeded in synthesizing various morphological BaSO 4 particles such as rectangular, …
inhibitors of barium sulfate (barite), a pervasive and undesirable mineral scale in many industrial processes. Through bulk crystallization, time-resolved microscopy, and scattering …
This paper reviews critically the important studies that have been reported in the literature on the barium sulphate precipitation system with an emphasis on the influence of …
Nano-size particles of barium hexaferrite have been synthesized by what is termed mechano-combustion after milling of intermediate products obtained in the sol–gel combustion process using ...
DOI: 10.1016/S0022-0248(02)02271-6 Corpus ID: 54615038; The role of phosphonate speciation on the inhibition of barium sulfate precipitation @article{Jones2003TheRO, title={The role of phosphonate speciation on the inhibition of barium sulfate precipitation}, author={Franca Jones and A. Stanley and Allan Oliveira and Andrew L. …
The aim of the present work was to investigate the influence of various experimental parameters on inhibiting the crystallization process, size, and morphology of barium sulfate crystals in the ...
Citric Acid Addition to Controlling Crystallization of Barium Sulphate (BaSO4) in Pipes through Ba2+ ... with seawater during the oil production process, such as down-hole in the near well bore area and production tubular as well as in the topside, crude oil, processing equipment. ... to calcium sulfate and calcium carbonate, which are ...
Definitions of Acids and Bases. In Chapter 4.6, we defined acids as substances that dissolve in water to produce H + ions, whereas bases were defined as substances that dissolve in water to produce OH − ions. In fact, this …
Scanning electron microscopic investigations of the barium sulfate crystals grown in the presence of poly(acrylic acids) show that structures of these crystals are highly modified. A mechanism …
The barium sulfate scale was found to decrease the reservoir rock permeability, and the temperature is a critical parameter for the barium sulfate scale deposition as the precipitation decreases ...
In this work, the use of a spinning disk reactor as a unit for a reaction−precipitation process is investigated. An experimental study is reported concerning the precipitation of barium sulfate ...
The present studies were devoted to the removal of sulfates from mine wastewater with a sulfate content of 1050 mg/l by introducing various doses of barium-containing reagents, namely barium ...
In the present study, synthesis of barium sulfate crystals (BaSO4, barite) is carried out by chemical precipitation method to investigate the effects of polystrene and alginate on particle size and morphology of crystals.
E-Z- DRY (barium sulfate) is a radiographic contrast agent that is supplied as white to lightly colored powder for suspension (40% w/w) with a vanilla aroma for oral administration. It has a molecular weight of 233.4 g/mol and a density of 4.5 g/cm. 3. The active ingredient barium sulfate is designated chemically as BaSO. 4 . with
International Journal of Science, Technology & Management. Deposits of barium sulfate are a common issue in the oil and gas industry. The presence of these crystals impacts oil and gas production, causing technical problems such as inhibiting flow rate, increasing pressure in the pipe, and causing the pipe to break and be damaged.
Sulfate 10 7. Nitrate 10 8. Trifluoroacetate 10 9. Phosphate 20 Separation of Common Anions and TFA ... barium, strontium, methylamine, dimethylamine, trimethylamine, ... • USP-NF <345> Assay for Citric Acid/Citrate and Phosphate • Risedronate Sodium Assay • Cefepime Hydrochloride—Limit of . N
The formation of barium sulphate as called barite and other insoluble scale types (metal sulphate, calcium carbonate and silicates) is a very common case in the oilfield and frequently happen …
This work included two different types of dissolving process (inorganic and organic) which used for the complete dissolving barium sulfate (barite).
PDF | On Apr 23, 2019, Lu Liu and others published Interfacial Phenomena in the Synthesis Process of Barium Sulfate Particles Precipitated in a Lobed Inner Cylinder Taylor-Couette Flow Reactor ...
XRD analysis of the scale sample in the presence of citric acid at (a) 3000 and (b) 4000 ppm on Ba 2+ concentration 4. Conclusion Experimental scaling of BaSO 4 with variations in Ba 2 ...
Oral contrast agents used during CT colonography (CTC) are valuable and may reduce false positive and false negative detections due to stool and residual fluid. Electronic cleansing algorithms are feasible, and oral contrast agents can eliminate the CTC requirement for a clean colon. Recent work shows oral contrast frequently adheres to polyps, with a preference for …
