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1. Formaldehyde oxidation on Pd/USY catalysts at room temperature: The effect of acid pretreatment on supports

Author:
Xiaofeng Liu; Chunying Wang; Yumin Chen; Qi Qin; Yaobin Li; Hong He
Source:
Journal of environmental sciences (China) 2023 v.125 pp. 811-822
ISSN:
1001-0742
Subject:
hydrochloric acid,   etc   ; acid treatment; adsorption; ambient temperature; carbon dioxide; catalytic activity; formaldehyde; formates; oxidation; reaction mechanisms; surface area; zeolites; China;     Show all 13 Subjects
Abstract:
... The complete catalytic oxidation of formaldehyde (HCHO) to CO₂ and H₂O at room temperature is a green route for indoor HCHO removal. Zeolite is an excellent carrier material for HCHO oxidation due to its large surface area, intricate pores and high adsorption capacity. However, the zeolite-supported noble metal catalysts have currently shown relatively low activity especially at room temperature. ...
DOI:
10.1016/j.jes.2022.02.025

2. Ionic melting salt imidazole hydrochloride mediated the decarboxylation of (hetero)aromatic carboxylic acids

Author:
Yin Wang; Ping Xu; Yanwu Li; Yue Wu; Siwei Liao; Xin Huang; Xiuyu Zhang; Jianyong Yuan
Source:
Tetrahedron letters 2022 v.102 pp. 153941
ISSN:
0040-4039
Subject:
hydrochloric acid,   etc   ; decarboxylation; imidazole;     Show all 3 Subjects
Abstract:
... Imidazole hydrochloride, a hydrochloric acid carrier, was used to mediate the decarboxylation of ortho-para position amino-substituted aromatic acids and nitrogen-containing heterocyclic acids, which gave excellent yields within a short time. In addition, the method can be well adapted to a gram scale, and the imidazole hydrochloride additives can be appropriately recovered for secondary utilizati ...
DOI:
10.1016/j.tetlet.2022.153941

3. Metal-free transfer hydrochlorination of internal C–C triple bonds with a bicyclo[3.1.0]hexane-based surrogate releasing two molecules of hydrogen chloride

Author:
Andreas J. Weidkamp; Martin Oestreich
Source:
Chemical communications 2022 v.58 no.7 pp. 973-976
ISSN:
1364-548X
Subject:
hydrochloric acid,   etc   ; catalytic activity; cations; chlorides;     Show all 4 Subjects
Abstract:
... The development and application of a transfer hydrochlorination reagent based on a trichlorinated bicyclo[3.1.0]hexane core that transfers two molecules of HCl per molecule of surrogate to a π-basic substrate under B(C₆F₅)₃ catalysis is reported. Lewis acid-assisted chloride abstraction followed by thermal electrocyclic cyclopropyl-to-allyl cation ring opening releases ring strain as a previously ...
DOI:
10.1039/d1cc06591b

4. Revealing the Anticorrelation Behavior Mechanism between the Grotthuss and Vehicular Diffusions for Proton Transport in Concentrated Acid Solutions

Author:
Takuya Mabuchi
Source:
Journal of physical chemistry 2022 v.126 no.17 pp. 3319-3326
ISSN:
1520-5207
Subject:
hydrochloric acid,   etc   ; hydrogen bonding; molecular dynamics; solvation;     Show all 4 Subjects
Abstract:
... In this study, we performed reactive molecular dynamics simulations to characterize proton solvation and transport in concentrated hydrochloric acid solutions. The correlation contribution to the total proton mean square displacement is found to be negative for all acid concentrations, indicating the anticorrelation between the Grotthuss and vehicular diffusions. For the vehicular diffusion, the h ...
DOI:
10.1021/acs.jpcb.1c09742

5. Removal of cadmium from rice grains by acid soaking and quality evaluation of decontaminated rice

Author:
Wei Feng; Daming Fan; Keqiang Li; Tao Wang; Hao Zhang; Xing Zhou; Jianhua Wan; Ren Wang
Source:
Food chemistry 2022 v.371 pp. 131099
ISSN:
0308-8146
Subject:
hydrochloric acid,   etc   ; cadmium; decontamination; food chemistry; rice; China;     Show all 6 Subjects
Abstract:
... Contamination of rice by cadmium (Cd) is threatening a large population in China. In this study, we report that soaking rice grains in a hydrochloric acid (HCl) solution can remove Cd to a desirable extent. The results indicated that the degree of Cd removal was up to 45%∼85% at different soaking times and concentrations of HCl (0.06 M ∼ 0.18 M), which was found to be logarithmically correlated wi ...
DOI:
10.1016/j.foodchem.2021.131099

6. A microplate spectrophotometric method for analysis of indole-3-carbinol in dietary supplements using p-dimethylaminocinnamaldehyde (DMACA) as a chromogenic reagent

Author:
Korbua Chaisiwamongkhol; Apichai Phonchai; Sunisa Pon-in; Thanthapatra Bunchuay; Warakorn Limbut
Source:
Analytical methods 2022 v.14 no.35 pp. 3366-3374
ISSN:
1759-9679
Subject:
hydrochloric acid,   etc   ; absorbance; colorimetry; detection limit; quality control; spectrophotometers;     Show all 6 Subjects
Abstract:
... This work presents the development of a microplate spectrophotometric method for determination of indole-3-carbinol in dietary supplements. The colorimetric procedure is based on the reaction of indole-3-carbinol with the p-dimethylaminocinnamaldehyde (DMACA) reagent under acidic conditions. The absorbance of the colored product measured at 675 nm was used to determine the target analyte. To achie ...
DOI:
10.1039/d2ay01129h

7. A Review on Desulfurization Technologies of Blast Furnace Gases

Author:
Pengfei Li; Guangchun Wang; Yuan Dong; Yuqun Zhuo; Yaming Fan
Source:
Current pollution reports 2022 v.8 no.2 pp. 189-200
ISSN:
2198-6592
Subject:
hydrochloric acid,   etc   ; air pollution; chlorides; corrosion; desulfurization; furnaces; sulfur;     Show all 7 Subjects
Abstract:
... The blast furnace gas, a low-calorific value fuel, is worthy of recycling. However, the sulfuric contents in blast furnace gases would cause pipeline corrosion and air pollution that are adverse to reutilization of blast furnace gases. Therefore, desulfurization technologies of blast furnace gas are necessary, which have been recently attracting much attention. This article clarifies main sources ...
DOI:
10.1007/s40726-022-00212-z

8. The Role of Through-Bond Stereoelectronic Effects in the Reactivity of 3-Azabicyclo[3.3.1]nonanes

Author:
Croix J. Laconsay; Tyler C. Rho; Dean J. Tantillo
Source:
Journal of organic chemistry 2022 v.87 no.5 pp. 3378-3388
ISSN:
1520-6904
Subject:
hydrochloric acid,   etc   ; chlorides; density functional theory; models; organic chemistry;     Show all 5 Subjects
Abstract:
... Hyperconjugation/conjugation through-bond stereoelectronic effects were studied with density functional theory in the context of 3-azabicyclo[3.3.1]nonanes to unravel puzzling differences in reactivity between a vinylogous chloride (4) and a vinylogous ester (5). These compounds─whose structures differ only by one substituent─were found to display strikingly different reactivities in hydrochloric ...
DOI:
10.1021/acs.joc.1c02992

9. Two-stage thermal and catalytic cracking of polypropylene using natural clinoptilolite in a catalytic step to petrochemicals and fuels

Author:
Božena Vasilkovová; Elena Hájeková; Pavol Hudec; Jana Česáková; Michal Horňáček; Michal Kaliňák; Vladimír Jorík
Source:
Journal of analytical and applied pyrolysis 2022 v.167 pp. 105679
ISSN:
0165-2370
Subject:
hydrochloric acid,   etc   ; catalysts; gasoline; liquids; plastics; polypropylenes; pyrolysis; wastes;     Show all 8 Subjects
Abstract:
... Raw natural clinoptilolite from the Slovak deposit in Nižný Hrabovec and clinoptilolite treated with solution of hydrochloric acid (0.1 M) were used to promote cracking of polypropylene (PP), as a representative of the second most common plastic in municipal waste, into valuable gaseous and liquid hydrocarbons. The influence of catalyst was studied using two-stage cracking apparatus. The process c ...
DOI:
10.1016/j.jaap.2022.105679

10. Wearable Eu@HOF luminescent fabric as a highly selective and sensitive optical synapse sensor for identification of six laboratory volatile compounds by neuromorphic computing

Author:
Xin Xu; Bing Yan
Source:
Journal of materials chemistry A 2022 v.10 no.29 pp. 15427-15437
ISSN:
2050-7496
Subject:
hydrochloric acid,   etc   ; artificial intelligence; electroplating; ethylenediamines; fabrics; methylamine; phosphorescence; synapse;     Show all 8 Subjects
Abstract:
... As a product of the artificial intelligence (AI) age, the artificial optical synaptic sensor (AOSS) integrating an optical sensor and artificial synaptic system (ASS) shows a huge advantage for classification and quantitative detection of various harmful gases. Herein, a dual-emission Eu@IsoMe@Cu/Ni fabric (1) is fabricated for the first time by electrodeposition for harmful gas detection. 1 can e ...
DOI:
10.1039/d2ta03154j

11. Development of retinoic acid receptor antagonists bearing trans-SF4-alkynyl structure as a linear linker

Author:
Shuichi Mori; Nozomi Tsuemoto; Emiko Kawachi; Chiharu Takubo; Aya Tanatani; Hiroyuki Kagechika
Source:
Tetrahedron 2022 pp. 132967
ISSN:
0040-4020
Subject:
hydrochloric acid,   etc   ; chlorides; moieties; reporter genes; retinoic acid receptors; retinoids;     Show all 6 Subjects
Abstract:
... Tetrafluoro-λ⁶-sulfane (tetrafluorosulfanyl, SF₄) compounds possess unique properties, including a linear structure and high electronegativity. Here, to investigate the utility of the trans-SF₄ moiety as a structural element of bioactive compounds, we designed and synthesized novel retinoids containing a trans-SF₄-alkynyl group as a linear linker. The radical addition reaction of aryltetrafluorosu ...
DOI:
10.1016/j.tet.2022.132967

12. Effects of acid-based fracturing fluids with variable hydrochloric acid contents on the microstructure of bituminous coal: An experimental study

Author:
Wang Zepeng; Ge Zhaolong; Li Ruihui; Liu Xianfeng; Wang Haoming; Gong Shihui
Source:
Energy 2022 v.244 pp. 122621
ISSN:
0360-5442
Subject:
hydrochloric acid,   etc   ; adsorption; coal; coalbed methane; energy; microstructure; pollution; risk;     Show all 8 Subjects
Abstract:
... Acid based fracturing fluid (AFF) with appropriate hydrochloric acid (HCl) content is not only conducive to the exploitation of coalbed methane (ECBM), but also can reduce the cost and the risk of environmental pollution. The optimum HCl content can be obtained by FTIR, MIP, and XRD test of the treated coal samples. The results show that the lag zone reaches the minimum value of 0.09 when the HCl ...
DOI:
10.1016/j.energy.2021.122621

13. Acid leaching of LiCoO2 enhanced by reducing agent. Model formulation and validation

Author:
M.M. Cerrillo-Gonzalez; M. Villen-Guzman; C. Vereda-Alonso; J.M. Rodriguez-Maroto; J.M. Paz-Garcia
Source:
Chemosphere 2022 v.287 pp. 132020
ISSN:
0045-6535
Subject:
hydrochloric acid,   etc   ; hydrogen peroxide; lithium cobalt oxide; model validation; models; oxygen;     Show all 6 Subjects
Abstract:
... In this work, a model has been formulated to describe the complex process of LiCoO2 leaching through the participation of competing reactions in acid media including the effect of H2O2 as reducing agent. The model presented here describes the extraction of Li and Co in the presence and absence of H2O2, and it takes into account the different phenomena affecting the controlling mechanisms. In this ...
DOI:
10.1016/j.chemosphere.2021.132020

14. Fabrication of conductive silver paste recovered from leaching of waste catalyst using hydrochloric acid

Author:
Suhyeon Lee; Brakowaa Frimpong; Stanley Abbey; Yoon Sil Moon; Kyoungkeun Yoo; Young-Min Oh; Soo-Kyung Kim; Sang-Joon Kim; Min-Wook Oh
Source:
RSC advances 2022 v.12 no.16 pp. 9698-9703
ISSN:
2046-2069
Subject:
hydrochloric acid,   etc   ; ammonia; catalysts; electrical resistance; electrodes; hydrogen; palladium; silver; solvents;     Show all 9 Subjects
Abstract:
... Transition metal compounds based on silver (Ag) and palladium (Pd) are extensively used as catalysts in the petrochemical industries. The catalytic activities of Ag and Pd decrease over time and hence need to be discarded. The recovery of elements like Ag from waste catalyst is essential because of its limited availability and cost, and it is environmentally beneficial with regards to recycling. I ...
DOI:
10.1039/d1ra09435a

15. Degradation of corn starch with different moisture content by gaseous hydrogen chloride

Author:
Chia-Long Lin; Jheng-Hua Lin; Ciao-Ling Pan; Yung-Ho Chang
Source:
International journal of biological macromolecules 2022 v.219 pp. 463-472
ISSN:
0141-8130
Subject:
hydrochloric acid,   etc   ; corn starch; gelatinization; gelatinization temperature; polymerization; thermal properties; water content;     Show all 7 Subjects
Abstract:
... Corn starch, subjected to solid-state degradation using gaseous hydrogen chloride, was characterized to investigate the parameter effects on starch properties and further explore the thermal behavior of inter-crystalline amorphous lamellae of starch. The obtained starch granules exhibited A-type polymorph with 75–98 % recovery (w/w). Degreasing moisture content (6–12 %) with increasing duration (1 ...
DOI:
10.1016/j.ijbiomac.2022.07.218

16. Development of a sample preparation procedure for Sr isotope analysis of Portland cements

Author:
Anera Kazlagić; Francesco F. Russo; Jochen Vogl; Patrick Sturm; Dietmar Stephan; Gregor J. G. Gluth
Source:
Analytical and bioanalytical chemistry 2022 v.414 no.15 pp. 4379-4389
ISSN:
1618-2642
Subject:
hydrochloric acid,   etc   ; analytical chemistry; cement; isotope labeling; nitric acid; potassium hydroxide; sucrose;     Show all 7 Subjects
Abstract:
... The ⁸⁷Sr/⁸⁶Sr isotope ratio can, in principle, be used for provenancing of cement. However, while commercial cements consist of multiple components, no detailed investigation into their individual ⁸⁷Sr/⁸⁶Sr isotope ratios or their influence on the integral ⁸⁷Sr/⁸⁶Sr isotope ratio of the resulting cement was conducted previously. Therefore, the present study aimed at determining and comparing the c ...
DOI:
10.1007/s00216-021-03821-7

17. Efficient extraction of phosphate from dephosphorization slag by hydrochloric acid leaching

Author:
Chuan-ming Du; Yao-hui Yu; Liu-dong Jiang; Jing-kun Yu
Source:
Journal of cleaner production 2022 v.332 pp. 130087
ISSN:
0959-6526
Subject:
hydrochloric acid,   etc   ; chemical precipitation; feedstocks; leachates; pH; phosphates; phosphorus; phosphorus fertilizers; slags;     Show all 9 Subjects
Abstract:
... Phosphorus is an indispensable nutrient element in agriculture and its reserves are limited. To secure a sustainable supply of phosphorus, phosphate recovery from dephosphorization slag generated in steelmaking was considered a promising solution. In this study, acid leaching was adopted to separate the P-concentrating solid solution from dephosphorization slag. Selective leaching of P from slags ...
DOI:
10.1016/j.jclepro.2021.130087

18. Fixed-bed column dynamics of ultrasound and Na-functionalized diatomite to remove phosphate from water

Author:
Junxiu Ye; Min Yang; Xuemei Ding; Wei Tan; Guizhen Li; Shuju Fang; Hongbin Wang
Source:
Environmental science and pollution research 2022 v.29 no.9 pp. 12441-12449
ISSN:
0944-1344
Subject:
hydrochloric acid,   etc   ; adsorbents; adsorption; diatomaceous earth; models; phosphates; pollution; research; ultrasonics; wastewater;     Show all 10 Subjects
Abstract:
... A continuous fixed-bed column study was used to evaluate phosphate adsorption performance of U-D-Na which was functionalized by the cheap NaCl reagent after simple ultrasonic purification of diatomite. In this work, various effect factors, including flow rate, initial phosphate concentration, and the bed height, on breakthrough performance of fixed column were investigated. Experimental results de ...
DOI:
10.1007/s11356-021-15126-4

19. Laboratory evidence for slip evolution of granite fractures due to chemical stimulation in geothermal reservoirs

Author:
Wei Wu; Marco Calò; Zhou Fang
Source:
Engineering geology 2022 v.306 pp. 106773
ISSN:
0013-7952
Subject:
hydrochloric acid,   etc   ; acid treatment; evolution; geophysics; geothermal energy; granite; shear stress; France;     Show all 8 Subjects
Abstract:
... Understanding the mechanisms of injection-induced seismicity is critical for managing the anthropogenic geohazard, which recently hinders the development of geothermal energy. Here we reanalyzed the seismic data recorded during the acid fluid injection at the geothermal field of Soultz-sous-Forêts (France) in 2005 and conducted a series of water injection experiments on granite fractures treated w ...
DOI:
10.1016/j.enggeo.2022.106773

20. Effective and reusable 3D CuxS nanocluster structured magnetic adsorbent for mercury extraction from wastewater

Author:
Peng Li; Jiu Huang; Chen Gao; Guiyin Xu; Guanghui Wang; Bo Zhang; Chenglong Duan
Source:
Chemosphere 2022 v.301 pp. 134818
ISSN:
0045-6535
Subject:
hydrochloric acid,   etc   ; adsorbents; adsorption; environmental protection; magnetism; mercury; sulfides; wastewater; water pollution;     Show all 9 Subjects
Abstract:
... The elimination of mercury from polluted water using an effective, cost-economic, and sustainable method was investigated in this work. A modulated multilayer magnetic Hg²⁺ extractor was prepared with a self-assembly engineering that permitting robust anchoring and uniform distribution of the negatively charged 3D CuₓS nanocluster onto a polydopamine (PDA) covered positively strengthened Fe₃O₄ sur ...
DOI:
10.1016/j.chemosphere.2022.134818