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Wollastonite reaction acetic acid

  • Phenylacetic acid C8H8O2 - PubChem

    Phenylacetic acid C8H8O2 CID 999 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety

  • Tuning the dissolution kinetics of wollastonite via

    In this study, the effect of various types of chelating agents on the dissolution rate of calcium-bearing silicate mineral, wollastonite, was explored to accelerate its weathering rate. It was found that chelating agents such as acetic acid and gluconic acid significantly improved the dissolution kinetics of wollastonite even at a much diluted

  • (PDF) Mineral carbonation of desulfurization residue for

    the acetic acid-leached wollastonite to perform the car-bonation reaction at 30 °C under ambient pressure, but the . the leaching reaction than can acetic acid. Conversely,

  • Tuning the dissolution kinetics of wollastonite via

    Sep 28, 2013· It was found that chelating agents such as acetic acid and gluconic acid significantly improved the dissolution kinetics of wollastonite even at a much diluted concentration of 0.006 M by complexing with calcium in the mineral matrix.

  • Mechanism and kinetics of wollastonite fibre dissolution

    The dissolution of fibrous wollastonite (CaSiO3) in the aqueous solution of acetic acid (3 mol dm 3) was investigated in the temperature interval from 25 to 50 °C using mixed batch-type reactor.

  • CiteSeerX SOIL REACTION AND ABSORPTION OF SILICON BY RICE

    The materials increased soil pH as the applied rates increased, except silicic acid. Soluble silicon extracted by 0.5 mol L-1 acetic acid also increased with applied rates. For calcium chloride, soluble silicon increased in the soil only with wollastonite and calcium and

  • Ex-situ Mineral Carbonation - Fondation Tuck

    Multi-step carbonation Acetic acid route Kakizawa et al., Energy, 26 (2001) Dissolution of wollastonite (T=60°C, L/S=5) CaCO 3 precipitation: T=40/80 °C, P(CO 2) = 5-50 bar Acetic acid pKa (4.76) is between pKa of Carbonic (3.6) and Silicic acid (9.51) This allows the acid to be replaced by carbonic acid in the crystallization

  • A new CO2 disposal process via artificial weathering of

    Apr 01, 2001· Wollastonite particles (13.26 g) were introduced to the reactor and mixed with the aqueous solution of acetic acid (acetic acid/water=13.72 g/50 g). The reaction temperature was 60°C, and the reaction pressure was the atmospheric pressure. The reactant was stirred by

  • Silane, ethoxytrimethyl-, reaction products with

    Silane, ethoxytrimethyl-, reaction products with wollastonite (Ca(SiO3)) 100402-86-6 Suppliers,provide Silane, ethoxytrimethyl-, reaction products with wollastonite (Ca(SiO3)) 100402-86-6 product and the products related with China (Mainland) Silane, ethoxytrimethyl-, reaction products with wollastonite (Ca(SiO3)) 100402-86-6 Hangzhou J&H Chemical Co., Ltd. China (Mainland)

  • A new CO2 disposal process via artificial weathering of

    Apr 01, 2001· Wollastonite particles (13.26 g) were introduced to the reactor and mixed with the aqueous solution of acetic acid (acetic acid/water=13.72 g/50 g). The reaction temperature was 60°C, and the reaction pressure was the atmospheric pressure. The reactant was stirred by

  • Selection of acid for weak acid processing of wollastonite

    The apparent activation energies amount to 11 ± 3, 47 ± 13 and 52 ± 14 kJ mol-1 for dissolution in formic, acetic and DL-lactic acids, respectively. These values indicate the initial diffusion limitation in the film around wollastonite particles for formic acid, and kinetic limitation for acetic and DL-lactic acids.

  • A Novel Indirect Wollastonite Carbonation Route for CO2

    Jul 01, 2010· Kakizawa [8] proposed an indirect mineral carbonation process via artificial weathering of wollastonite accelerated by acetic acid. This process is divided into two steps: (1) extraction of calcium ions by acetic acid from wollastonite and (2) deposition of CaCO3 from the

  • pH Buffers in the Blood - Department of Chemistry

    Acid-base buffers confer resistance to a change in the pH of a solution when hydrogen ions (protons) or hydroxide ions are added or removed. An acid-base buffer typically consists of a weak acid, and its conjugate base (salt) (see Equations 2-4 in the blue box, below). Buffers work because the concentrations of the weak acid and its salt are

  • Soil reaction and absorption of silicon by rice

    Additionally, the acetic acid is able to extract non available silicon present in some materials such as calcium and magnesium silicate, but it is not true for wollastonite (Pereira et al., 2004). Xu et al. (2001) attributed to calcium silicate dissolution the high silicon extracted with acid extracting solution (pH 4) in calcareous soils.

  • Acetic acid CH3COOH - PubChem

    Acetic acid CH3COOH or C2H4O2 CID 176 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities

  • Disposing of Greenhouse Gases - Canadian Wollastonite

    of wollastonite will be carried out with varying amounts of chemical additives, such as, citric acid, EDTA, ammonium chloride, acetic acid and phosphoric acid. The effects of temperature and chemical concentrations on the reaction rates will be investigated. Once optimal reaction

  • Dissolving behavior and calcium release from fibrous

    The dissolution of fibrous wollastonite (CaSiO3) in the aqueous solution of acetic acid (3 mol dm 3) was investigated in the temperature interval from 25 to 50 °C using mixed batch-type reactor.

  • The Carbonation of Wollastonite: A Model Reaction to Test

    Alternatively, complexing agents (e.g., ethylenediaminetetraacetic acid, EDTA) and weak organic acids (e.g., acetic acid) can enhance silicate dissolution at moderately acid (pH 24.5) or circumneutral pH conditions [21,22,23], but their cost and complex recycling

  • (PDF) Low temperature production of wollastonite from

    Low temperature production of wollastonite from limestone and silica sand through solid-state reaction analysis of CaO content using a titrimetric method with a standard solution of ethylenediaminetetra-acetic acid disodium salt (EDTA) and gravimetric method for SiO 2 and loss on ignition (LOI) content through the dissolution process and

  • The "Acid Test" for Carbonate Minerals and Carbonate Rocks

    The Acid Test on Rocks. LIMESTONE, DOLOSTONE, AND MARBLE. Some rocks contain carbonate minerals, and the acid test can be used to help identify them. Limestone is composed almost entirely of calcite and will produce a vigorous fizz with a drop of hydrochloric acid. Dolostone is a rock composed of almost entirely of dolomite. It will produce a very weak fizz when a drop of cold hydrochloric

  • EconPapers: A new CO2 disposal process via artificial

    A new CO2 disposal process via artificial weathering of calcium silicate accelerated by acetic acid. M. Kakizawa, A. Yamasaki and Y. Yanagisawa. Energy, 2001, vol. 26, issue 4, 341-354 . Abstract: A new disposal process for anthropogenic CO2 via an artificially accelerated weathering reaction is proposed to counteract global warming. The process is essentially composed of the following two

  • Dissolution of steelmaking slags in acetic acid for

    types resemble wollastonite [11]. However, iron and steel slag can also have high contents of magnesium silicates (and many other compounds), for which it is possible that similar reactions might occur in contact with acetic acid: MgSiO 3þ 2CH COOH ! Mg2þ þ2CH 3COOH þ SiO 2 þH 2O; ð6Þ Mg2 þ2CH 3COO! CO 2 þ H 2O! MgCO 3ð#Þ þ2CH COOH

  • Carbonation of Wollastonite - A Model Reaction to Test

    The Carbonation of Wollastonite: A Model Reaction to Test Natural and Biomimetic Catalysts for [6,18]. This is the case, for instance, of the acid-promoted dissolution of primary silicates in a reactor followed by the injection of CO2 in the acetic acid) can enhance silicate dissolution at moderately acid (pH 24.5) or circumneutral

  • Mechanism and kinetics of wollastonite fibre dissolution

    Jan 30, 2011· The dissolution of wollastonite in the diluted solution of acetic acid includes the following processes: 1) Wetting of wollastonite raw material in the leaching solution and releasing of wetting

  • Carbonation of natural pure and impure wollastonite

    The hydrochloric acid had a molarity of 2.87 mol/L and the acetic acid a molarity of 3.26 mol/L. Hydrochloric acid is aggressive and attacks the wollastonite as well, therefore a second, less aggressive acid (i.e. acetic acid) was chosen. As carbonates are not stable at high temperatures, temperature as third treatment for purification was chosen.

  • Production of precipitated calcium carbonate from

    Wollastonite (< 250 µm) % Figure 4. Extraction of calcium from steelmaking slags and wollastonite in aqueous solutions of acetic acid (33.3 wt-% CH 3 COOH). 0 20 40 60 80 100 120 0 10 203040 50 Moles of acetic acid in solution per moles of Ca in slag (wt-%) Ca Si Mg Al Fe % acted after 2 h (%) Figure 5. Effect of concentration of acetic acid

  • Selection of acid for weak acid processing of wollastonite

    Selection of acid for weak acid processing of wollastonite for mineralisation of CO 2. Author links open overlay panel Manisha Ghoorah a Bogdan Z. Dlugogorski b Reydick D. Manisha Ghoorah a Bogdan Z. Dlugogorski b Reydick D.

  • Selection of acid for weak acid processing of wollastonite

    Typically, mineral carbonation comprises aqueous phase reactions involving the dissolution of naturally occurring magnesium and calcium silicate rocks, such as olivine, serpentinites and wollastonite, followed by the precipitation of magnesium and calcium carbonate minerals. In this report, we evaluated the effect of formic, acetic and DL-lactic acids on the calcium-leaching process from

  • Distinguishing between carbonate and non-carbonate

    dicarboxylic succinic acid proves to be more effective in extracting the alkaline components, reaching 30-31 % total extraction extent compared to 21 % for the monocarboxylic acetic acid. The leaching extent of succinic acid surpasses that of acetic acid both in the first stage, by

  • Wollastonite A Versatile Functional Filler

    Nov 01, 2002· Wollastonite is subject to dissociation by mineral acids, especially hydrochloric acid, and certain organic acids (formic, acetic, citric, lactic). Incomplete acid dissolution forms a silica gel. Wollastonite has a strong buffering effect in acid solutions due to the release of calcium ion.

  • 10.1016/j.tca.2009.10.002 10.1016/j.tca.2009 - DeepDyve

    Jun 11, 2020· Naturally there must be sufficient excess of acetic acid in the reaction mixture so that its concentration is practically constant during the leaching process. Filtrates gained from 24 h lasting dissolution of wollastonite in the aqueous solution of acetic acid within temperature range from 22 to 50 °C were analyzed by ICP-OES to determine the

  • CO 2 mineral sequestration by wollastonite carbonation

    We also used the acetic acid-leached wollastonite to perform the carbonation reaction at 30 °C under ambient pressure, but the carbonation rate was very low (only 4 %). The reason for this is likely that acetic acid is a weak acid, so the majority of Ca 2+ in pristine wollastonite cannot be acid leached at ambient pressure.

  • Soil reaction and absorption of silicon by rice Reação do

    The materials increased soil pH as the applied rates increased, except silicic acid. Soluble silicon extracted by 0.5 mol L-1 acetic acid also increased with applied rates. For calcium chloride, soluble silicon increased in the soil only with wollastonite and calcium and

  • Tailored Formation of Mineral Carbonates in the Presence

    Apr 07, 2014· It is found that chelating agents such as acetic acid and gluconic acid can significantly improve the dissolution kinetics of wollastonite even at a much diluted concentration of 0.006 M by complexing with calcium in the mineral matrix.

  • Selection of acid for weak acid processing of wollastonite

    Apr 15, 2014· The present study investigates the extent of calcium extraction from wollastonite when the latter was treated with three weak organic acids, viz. acetic, formic and DL-lactic acids, under the effect of increasing reaction temperature.

  • Selection of acid for weak acid processing of wollastonite

    Formic acid, acetic acid and lactic acid were used for acid leaching of Wollastonite and it was observed that formic acid performed the best amongst them with 96% leaching in three hour [115]. The

  • Optimum Conditions for Extracting Ca from CKD to Store CO

    optimum solvent type and reaction conditions (reaction time, temperature, solid-liquid ratio, solvent concentration, and stirring speed) for the maximum extraction of Ca from the CKD. 2.2.1 Solvent Sulfuric acid, hydrochloric acid, acetic acid, ammonium chloride, oxalic acid, citric acid

  • Industrial Minerals

    May 22, 2009· The controlling step is the leaching of the calcium ion from the wollastonite. This is increased by increasing surface area by reducing the particles size. Catalysts include acetic acid and sodium salts chloride, bicarbonate and nitrate. Conversion of wollastonite was 40% at 25°C at CO 2 pressure of 1 bar and 75% at 30 bars.

  • Influence of surface treatment on hybrid wollastonite

    A 95% ethanol5% water solution was adjusted to pH 4.55.5 with acetic acid, and silane was added to yield a 5% final concentration. The wollastonite crystals were silylated by stirring in the solution for 5 min and then decanting. The crystals were rinsed twice with ethanol and dried for 10 min at 110 °C.

  • LAB1 - Introem.okstate.edu

    Salicylic acid contains a phenolic OH group and gives a positive test (turns purple) with iron(III) chloride. Complete reaction of salicylic acid with acetic anhydride substitutes an ester for the phenolic group. Therefore, aspirin uncontaminated with the salicylic acid starting material will

  • CN103172095A - Method for producing ultrawhite aluminum

    The invention belongs to the technical field of metallurgy and in particular relates to a method for producing ultrawhite aluminum hydroxide and by-products from high-alumina fly ash by using high-temperature alkaline leaching. The method comprises the following steps of: carrying out two-stage pre-desilicication on the high-alumina fly ash, and then carrying out leaching reaction for 1.5-2.5