scholarly journals Performance of sodium lignosulfonate as thickening additive in compositions for matrix acidizing of bottom hole zone

2021 ◽  
Vol 1201 (1) ◽  
pp. 012077
Author(s):  
A A Sentemov
Keyword(s):  
Acid Solution ◽  
Reaction Rate ◽  
Acid Solutions ◽  
Sweep Efficiency ◽  
Sodium Lignosulfonate ◽  
Matrix Acidizing ◽  
Slowing Down ◽  
Bottom Hole ◽  
Hydrochloric Acid Solutions ◽  
Hcl Concentration

Abstract The work considers one of the promising directions for optimizing matrix acidizing using sodium lignosulfonate as a thickening agent. The mechanism of the interaction of acid solutions containing lignosulfonate with carbonate reservoirs is described. The use of sodium lignosulfonate in acid solutions solves several problems. Slowing the reaction rate allows the acid solution penetrate deeper into the formation, with maintaining the HCl concentration. The increased viscosity of the compositions increases the sweep efficiency of the bottomhole zone in the process of matrix acidizing. These two aspects increase the efficiency of matrix acidizing and the permeability of the bottomhole zone. In the course of this work, the chemical reaction rate of sodium lignosulfonate and hydrochloric acid solutions with carbonate core samples were evaluated. Sodium lignosulfonate in an acid solution reduces the dissolution rate of carbonate samples. It is assumed that slowing down the reaction rate allows the acid solution to form long high permeability channels which increases the efficiency of acidizing.

Study on Properties of Extraction Palladium(II) with the New Synthesized Material

2013 ◽  
Vol 774-776 ◽  
pp. 1342-1345 ◽  
Author(s):  
Shao Ping Feng ◽  
Zhao Long Huang ◽  
Wei Liu ◽  
Zi Jing Li ◽  
Yan Jiang ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Hydrochloric Acid ◽  
Acid Solution ◽  
Contact Time ◽  
Acid Solutions ◽  
Quantitative Extraction ◽  
Hydrochloric Acid Solutions ◽  
Thiourea Concentration ◽  
Extraction Parameters ◽  
Hcl Concentration

In this study, the solvent extraction of Pd(II) from hydrochloric acid solutions was investigated using the new synthesized material, 2-ethylhexyl benzothiazolyl sulfide (EHBTS) which was dissolved in xylene. Pd(II) was strongly extracted by 7% EHBTS in a lower concentration hydrochloric acid solution. Extraction parameters of Pd(II), including EHBTS concentration in different diluents, contact time of aqueous and organic phases, organic/aqueous (O/A) phase ratio and HCl concentration of aqueous phase, were studied. Quantitative extraction of Pd(II) occurred at 0.1 mol.L-1 of HCl concentration, 7% of EHBTS concentration, 1.0 of O/A, 40 min of contact time. In addition，the percentage stripping of Pd(II) could be more than 98% when thiourea concentration was 0.8 mol.L-1. EHBTS can be used more than 8 as extractant to extract of Pd(II) from hydrochloric acid solutions.

Studying rheological properties and reactivity of acid solutions with thickening additives

2021 ◽  
pp. 40-54
Author(s):  
M. B. Dorfman ◽  
A. A. Sentemov ◽  
I. P. Belozerov
Keyword(s):  
Rheological Properties ◽  
Acid Treatment ◽  
Reaction Rate ◽  
Acid Solutions ◽  
High Permeability ◽  
High Concentration ◽  
Sweep Efficiency ◽  
Reservoir Properties ◽  
Slowing Down ◽  
Lignosulfonic Acid

This article is the result of studies of rheological properties and reactivity of acid solutions of technical lignosulfonate, decationized lignosulfonic acid, and hydrochloric acid with the addition of lignosulfonate. Compositions that include lignosulfonate can be used as displacement agents in the development of watered layers with inhomogeneous reservoir properties. The use of thickening additives in acid solutions solves several problems. Slowing the reaction rate will allow the acid flow to leak in the reservoir deeper, with saving of acid capacity. The height viscosity of the compositions increases the sweep efficiency of the bottomhole zone by acid treatment. Due to the fact that thickening additives in the compositions have a high concentration, selective isolation of highly permeable areas of the reservoir can be realized, which, in turn, contributes to the formation of new pore channels.We evaluated the reactivity of acid solutions with thickening additives in the interaction with carbonate samples. The presence of technical lignosulfonate in an acid solution reduces the dissolution rate of samples. Slowing down the reaction rate will allow the acid composition to form long channels of high permeability, which, in turn, increases the efficiency of acid treatment.

Oxide chlorides of osmium

1968 ◽  
Vol 21 (3) ◽  
pp. 589 ◽  
Author(s):  
R Colton ◽  
RH Farthing
Keyword(s):  
Hydrochloric Acid ◽  
Acid Solution ◽  
Hydrochloric Acid Solution ◽  
Thionyl Chloride ◽  
Mass Spectrometric ◽  
Acid Solutions ◽  
Osmium Tetraoxide ◽  
Hydrochloric Acid Solutions ◽  
Mass Spectrometric Evidence

The product obtained by the reduction of osmium tetraoxide in hydrochloric acid solution, followed by evaporation to dryness, has been shown to be p-oxo-hexachlorodiosmium(1V), Os2Ocl6. Infrared, magnetic, and mass spectrometric evidence are presented to substantiate this formulation. Salts of the p-oxo-decachloro-diosmate(1V) ion are readily isolated from hydrochloric acid solutions of the oxide chloride. Unsuccessful attempts were made to repeat the preparation of the compound said to be p-oxo-octachlorodiosmium(v). Reduction of osmium tetraoxide with thionyl chloride was shown to give osmium tetrachloride.

Extraction of Metals from Polymetallic Raw Materials with the Regeneration of the Basic (NH3) and Acidic (HCl) Reagents

2019 ◽  
Vol 23 (2) ◽  
pp. 52-54
Author(s):  
L.A. Voropanova
Keyword(s):  
Hydrochloric Acid ◽  
Acid Solution ◽  
Hydrochloric Acid Solution ◽  
Raw Materials ◽  
Acid Solutions ◽  
Hydrochloric Acid Solutions ◽  
Extraction Of Metals

Extraction of metals from polymetallic raw materials is carried out by leaching with hydrochloric acid solution, then metals are precipitated from hydrochloric acid solutions with ammonia, the NH4Cl salt is crystallized from the solution, and the separate preparation of gaseous basic (NH3) and acid (HCl) reagents is performed by the interaction of (NH4)2SO4 and NH4Cl salts. The process of extraction of metals occurs in a closed production without release of environmentally hazardous components into the environment.

Sign in / Sign up

Export Citation Format

Share Document