Investigations of amino trimethylene phosphonic acid as a green and efficient depressant for the flotation separation of apatite from calcite

Liu, Cheng; Zhu, Lei; Fu, Weng; Chi, Ruan; Li, Hongqiang; Yang, Siyuan

doi:10.1016/j.mineng.2022.107552

Cited by 19 publications

(4 citation statements)

References 49 publications

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“…In this way, CH can dissolve in an ATMP solution and manifest a pH of 0.2. The pH of ATMP that mainly ionized the first proton is around 1 (p K a1 of the ATMP). , With pH = 0.2, one part of ATMP in the coating fluid reacted with CH, and the remaining ATMP had little negative charge due to the scarce ionization of phosphate groups at pH < p K a1 . Most of the amino groups in the CH chain (the p K a of CH is 6.2) are ionized at pH = 0.2.…”

Section: Resultsmentioning

confidence: 99%

Eco-Friendly and Facile Integrated Intumescent Polyelectrolyte Complex Coating with Universal Flame Retardancy and Smoke Suppression for Cotton and its Blending Fabrics

Wang

Zhan

et al. 2023

ACS Sustainable Chem. Eng.

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Cotton and its blended fabrics are widely used textile materials in daily life; however, their high flammability brings serious fire hazards. It remains a huge challenge to endow cotton and its blended fabrics through simple and universal technology. In this work, a novel water-based polyelectrolyte complex (PEC) coating was developed from chitosan and a water treatment agent (amino trimethylphosphonic acid). By controlling the degree of ion pair aggregation through pH adjustment, the intumescent and stable PEC coating can be constructed quickly via facile blading coating and curing processes. High transparency allows for the deposition of the coating with little effect on the original pattern of the coated fabric. Additionally, when the coated fabrics were exposed to flame, the PEC coating underwent a quick self-char-forming reaction in advance and formed a protective char layer covered on the fibers. Thus, the PEC coating with low adding-on (11.5–21.5 wt %) shows universally high flame retardancy for cotton, polyester/cotton blends, and polyester/poly(vinyl alcohol)/cotton blends. The coated fabrics show excellent extinguishing performances, high limiting oxygen index values of 27.5%–28.5%, and total release smoke inhibition of 42%. This work provides a promising universal technology for manufacturing fire-safety cotton and its blends in a simple and eco-friendly way.

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Section: Resultsmentioning

confidence: 99%

Eco-Friendly and Facile Integrated Intumescent Polyelectrolyte Complex Coating with Universal Flame Retardancy and Smoke Suppression for Cotton and its Blending Fabrics

Wang

Zhan

et al. 2023

ACS Sustainable Chem. Eng.

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“…Regarding the calcite, Fig. 9a plotted that Ca2p3/2 and Ca 2p1/2 peaks of calcium carbonate were observed at the peaks of 346.81 eV and 350.35 eV (Liu et al, 2022, Zhou et al, 2023Zhang et al, 2023). When calcite surface was treated with PMAA, two new fitted peaks emerged at 347.58 eV and 351.10 eV (Fig.…”

Section: Xps Analysismentioning

confidence: 89%

“…However, the radius of CO3 2-is longer than that of F -, therefore the chemical affinity of Ca 2+ with CO3 2-is weaker than that of Ca 2+ with F -. Hence, in solution, carbonate ions easily enter the liquid phase while calcium ions stay on calcite surface (Liu et al, 2022); after that, the PMAA might easily interact with the exposed calcium ions on calcite surface, hindering the adsorption of NaOl onto calcite surface since no extra activated Ca site was provided on calcite for NaOl interaction. The schematic representation of the interaction mechanism between minerals and reagents is plotted in Fig.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of a novel depressant PMAA for the separation of fluorite from calcite using NaOl as a collector

Zhang,

Li,

Qin

et al. 2024

Physicochem. Probl. Miner. Process.

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It is challenging to separate fluorite from calcite due to their same calcium activated sites on their surfaces. The copolymer of maleic and acylic acid (PMAA) was used to inhibit the calcite in the flotation of fluorite. Micro-flotation results exhibited that sodium oleate (NaOl) had a good ability to collect fluorite and calcite in the scope of pH 7-10. The PMAA treatment prior to NaOl selectively depressed the floatability of calcite while allowed the flotation of fluorite, and the artificial minerals mixture plotted that fluorite/calcite could be effectively separated in the presence of PMAA/NaOl. Zeta potential results suggested that NaOl collector was absorbed on the PMAA-conditioned calcite surface but did not adsorb on the PMAA-conditioned fluorite surface. XPS results and calculational chemistry revealed the chemical interaction occurred between calcite surface and PMAA which was attributed to the calcium ions of calcite surface interacting with -COOH group of PMAA.

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“…Kang et al found that 1-Hydroxyethylidene-1, 1diphosphonicacid (HEDP) has a strong adsorption effect on calcium-bearing veinstone minerals, which can reduce the floatability of calcite and fluorite (Kang et al, 2019). Liu et al found that the addition of amino trimethylene phosphonic acid (ATMP) could reduce the recovery of calcite to less than 15% (Liu et al, 2022). Ethylenediaminetetraacetic acid (EDTA) was used by Tian et al to reduce the separation difficulty of diatomite from fluorite and calcite (Tian et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Effective flotation separation of scheelite and calcite by applying methylene phosphonic acid sodium as a novel and green depressant

Zhou¹,

Hao²,

Guo³

et al. 2023

Physicochem. Probl. Miner. Process.

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It is known that the flotation separation of scheelite and calcite is quite difficult due to their similar surface properites. To slove the problem, ethylenediaminetetra (methylene phosphonic acid) sodium (EDTMPS), an environmentally friendly reagent, was employed as an efficient depressant for flotation separation of calcite for the first time. In flotation experiments, it demonstrates that EDTMPS could strongly inhibit the flotation of calcite but barely affect the flotaiton behavior of scheelite, showing excellent dpress ability and selectivity. Based on a series of measurements including contact angle analysis, zeta potential, and XPS analysis, it was found that large amout of EDTMPS could be absorbed on the surface of calcite through strong chemical chelation reaction and thus inhibiting the further adsorption of NaOL. On the contrary, little EDTMPS was absorbed on that of scheelite owing to the negatively charged tungstate ions on the surface in relative terms. All in all, these results exhibit EDTMPS has excellent selective inhibition ability on calcite, which can be potentially applied in actual scheelite and calcite flotation separation process.

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Investigations of amino trimethylene phosphonic acid as a green and efficient depressant for the flotation separation of apatite from calcite

Cited by 19 publications

References 49 publications

Eco-Friendly and Facile Integrated Intumescent Polyelectrolyte Complex Coating with Universal Flame Retardancy and Smoke Suppression for Cotton and its Blending Fabrics

Eco-Friendly and Facile Integrated Intumescent Polyelectrolyte Complex Coating with Universal Flame Retardancy and Smoke Suppression for Cotton and its Blending Fabrics

Evaluation of a novel depressant PMAA for the separation of fluorite from calcite using NaOl as a collector

Effective flotation separation of scheelite and calcite by applying methylene phosphonic acid sodium as a novel and green depressant

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