Evaluation of Solvents for Extraction of Residual Asphalt

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Evaluation of Solvents for Extraction of Residual Asphalt ...

When highway cores and hot mixes are extracted, several percent of the asphalt frequently remains on the aggregate. A variety of solvents were evaluated for their ability to remove this material. They were compared using several aggregates that had been extracted by three procedures. The effectiveness of alcohols as a solvent additive was investigated. Finally a direct comparison of trichloroethylene and toluene containing 15 pecent ethanol using an old road-core material was made. In general, trichloroethylene containing 15 percent ethanol was the best solvent tested. Pyridine is similar but objectionable for other reasons. The residual unextracted material is difficult to remove even with the best solvents.

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EVALUATION OF SOLVENTS FOR EXTRACTION OF RESIDUAL ASPHALT ...

evaluation of solvents for extraction of residual asphalt from aggregates When highway cores and hot mixes are extracted, several percent of the asphalt frequently remains on the aggregate. A variety of solvents were evaluated for their ability to remove this material.

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Evaluation of solvents for asphalt extraction: Road ...

2019-9-3  The laboratory evaluation of the performance of a number of asphalt extraction solvents was conducted. The performance testing was conducted on unmodified and polymer modified asphalt binder with the Bitumen Degradation Test (BDT) and on polymer modified and RAP mixtures with centrifuge extraction.

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Evaluation of solvents for asphalt extraction Request PDF

The laboratory evaluation of the performance of a number of asphalt extraction solvents was conducted. The performance testing was conducted on unmodified and polymer modified asphalt binder with ...

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(PDF) A Review of Solvent Extraction-Recovery Procedures ...

The extraction-recovery procedures and solvents used can also potentially have an impact on the recovered asphalt binder properties. As mixing and aging are not readily controllable, but testing...

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AN EVALUATION OF AN ALTERNATIVE SOLVENT FOR EXTRACTION

Trichloroethylene is a solvent currently used by the Florida Department of Transportation (FDOT) and many state highway agencies for separation of asphalt binders from asphalt paving mixtures in their quality control programs. However, trichloroethylene has been proven to contribute to ozone depletion and is also known as a carcinogen.

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Alternative Solvent for Reducing Health and Environmental ...

2000-1-1  Evaluation of Solvents for Extraction of Residual Asphalt from Aggregates. In Transportation Research Record 1323, TRB, National Research Council,

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Removal of residual solvent from solvent-extracted ...

2021-1-1  Solvent loss in the residual solids has been considered as a major challenge during the solvent extraction processes of unconventional oil ores (oil sands, asphalt rocks, etc.).

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USE OF NORMAL PROPYL BROMIDE SOLVENTS FOR

2021-8-10  Four normal propyl bromide solvents were evaluated for use as chlorinated solvent replacementsin typical hot mix asphalt (HMA) extraction and recovery processes. The experimental designincluded one method of extraction (centrifuge), one method of recovery (Rotavapor), fivesolvents (TCE and four nPB products), and six combinations of asphalts and aggregates (PG 46-34, PG 64-22, PG 76-22 (polymer modified); limestone, granite aggregates). Superpave binderproperties were determined for the original as well as the recovered binders. A full experimentalreplicate was conducted so that a statistical comparison of means could be used to evaluate theeffect of solvents

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Quantitative evaluation of asphalt binder extraction from ...

2021-3-1  The first step of the asphalt binder QA/QC process is accurately and precisely extract the asphalt mix . Such an extraction process is required for asphalt binder evaluation after exposure to the construction process and in-service. The depletion of crude oil, recycled materials, and new resources could contribute to the asphalt industry [5, 6].

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Effect of Extraction Residue on the Properties of Asphalt ...

2017-9-28  extraction residue on the properties of aged and unaged asphalt binders. The extraction residues such as trichloroethylene and mineral filler were varied in selected range of percentage (0.5, 1, 1.5 and 2%) and their effectwas comprehended in the ductility, softening point, penetration and dynamic shear rheometer tests of 70# grade and SBS

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Extraction and recovery of asphalt binder: a literature ...

2019-11-18  A literature review was conducted on the main aspects of asphalt binder extraction and recovery: i) extraction methods, ii) recovery methods and iii) solvents. The extraction methods include centrifuge, reflux and vacuum and others with particular

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Detection of Residual Solvent in Solvent-Extracted ...

2019-12-9  The solvent extraction technology is a promising method for recovery of unconventional oil resources because of its high efficiency, low energy consumption, and high compatibility. Solvent selection and solvent loss are the main limitations in terms of industrialization of the technology. To evaluate the solvent, efficient detection of the residual solvent content in the extracted-oil gangue ...

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Asphalt Extraction and Recovery Procedures

– The asphalt mixture is extracted with trichloroethylene (TCE), normal propyl bromide (nPb), or methylene chloride using the extraction equipment applicable to the particular method. – The asphalt binder content is calculated by difference from the mass of extracted aggregate, moisture content, if

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FDA evaluation of residual solvents in generics

2015-11-13  Residual solvents are carbon-containing compounds that are commonly used during the manufacture of pharmaceutical products in order to enhance the yield of the product, impact the physical properties of the drug substance, increase the purity of the

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Comparative Evaluation of Different Extraction

2015-6-11  Comparative Evaluation of Different Extraction Techniques and Solvents for the Assay of Phytochemicals and Antioxidant Activity of Hashemi Rice Bran Ali Ghasemzadeh *, Hawa Z. E. Jaafar, Abdul Shukor Juraimi and Amin Tayebi-Meigooni Department of Crop Science, Faculty of Agriculture, Universiti Putra Malaysia, 43400 Serdang,

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PROCESS SIMULATION AND EVALUATION OF

2021-5-29  Process Simulation and Evaluation of Alternative Solvents for Jatropha Curcas L. Seed Oil Extraction in Biodiesel Production. (August 2011) Ming-Hao Chiou, B.S., National Chung Hsing University

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Evaluation of methods and solvents for pigment extraction ...

Corpus ID: 133895539. Evaluation of methods and solvents for pigment extraction @inproceedings{Wright1997EvaluationOM, title={Evaluation of methods and solvents for pigment extraction}, author={S. Wright and S. Jeffrey and R. Mantoura}, year={1997} }

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Problem analysis of residual solvents control in drug evaluation

2009-5-18  Abstract: Some problems were often found in the residual solvents control in drug evaluation,including the determination of the organic solvents for residual solvents study,the conduction of the residual solvents control of finished products,the ...

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Stable Isotope-Assisted Evaluation of Different Extraction ...

2016-6-28  for the systematic evaluation of different extraction solvents for untargeted metabolomics of plants. 2. Results 2.1. General Description of Extract Compositions In this study, we compared the effect of six different extraction mixtures on the LC-HRMS metabolite profiles of green cereal extracts. For this purpose, four organs of flowering ...

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Comparative Evaluation of Methods for Removing Residual ...

Asphalt extraction and recovery are essential steps before characterizing components and properties of aged asphalt binders for recycling the reclaimed asphalt pavement (RAP). To accurately analyze the aged asphalt, it is essential to evaluate removal efficiency of residual mineral fillers during bitumen extraction and recovery.

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Field Evaluation of the Solvent Extraction Residual ...

2019-5-25  The Solvent Extraction Residual Biotreatment (SERB) technology was evaluated at a former dry cleaner site in Jacksonville, FL, where an area of tetrachloroethylene (PCE) contamination was identified. The SERB technology is a treatment train approach for complete site restoration, which combines an active in situ dense nonaqueous-phase liquid (DNAPL) removal technology, cosolvent extraction ...

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[Study on gas chromatographic method for the evaluation of ...

Extraction solvents differed in their extraction recovery and peak shape. Satisfactory results can be obtained when the proposed method was employed and a suitable extraction solvent was selected. The procedures summarized in this paper can be used as a guidance for the evaluation of residual organic solvents in bulk pharmaceuticals.

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Evaluation of residual products from heavy oil refining ...

2018-11-11  (2017). Evaluation of residual products from heavy oil refining for the use as an asphalt pavement material. Road Materials and Pavement Design: Vol. 18, No. 1, pp. 86-100.

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Residual Solvents - ACS Lab Cannabis

2021-8-11  Residual solvents are chemicals that may be left over from the process of extracting cannabinoids and terpenes from cannabis. This extraction process is used to produce wax, oils and liquid concentrate products, which make up more than a quarter of the cannabis market today. The process is generally simple, but when trace amounts remain in the cannabis solution, residual solvents can cause ...

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Drying of Organic Solvents: Quantitative Evaluation of the ...

2010-8-12  Drying of Organic Solvents: Quantitative Evaluation of the Efficiency of Several Desiccants ... ppm levels of residual moisture. Several types of silica were assessed for their desiccating ability, including standard ... 10.0 mL of the solvent for samples dried over 3 A˚ molecular sieves (10% m/v) for 24 h, providing essentially identical ...

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Evaluation of FORTA Fiber-Reinforced Asphalt Mixtures ...

2019-12-19  Evaluation of FORTA Fiber-Reinforced Asphalt Mixtures Using Advanced Material Characterization Tests – Evergreen Drive, Tempe, Arizona. Prepared by

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Quantitative Extraction of Asphalt Binder from Hot Mix ...

2021-7-30  The asphalt binder content is calculated by differences from the mass of the extracted aggregate and moisture content, and mineral matter in the extract (when using centrifuge extraction from Test Method A and when using the automated extraction in Method F . The asphalt binder content is expressed as a mass percent of moisture-free mixtures.

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Problem analysis of residual solvents control in drug evaluation

2009-5-18  Abstract: Some problems were often found in the residual solvents control in drug evaluation,including the determination of the organic solvents for residual solvents study,the conduction of the residual solvents control of finished products,the ...

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Systematic evaluation of hydrophobic deep-melting ...

Systematic evaluation of hydrophobic deep-melting eutectics as alternative solvents for the extraction of organic solutes from aqueous solution Michael J. Kaul,a Diab Qadah,b Victoria Mandellaa and Mark L. Dietz *a The partitioning of a number of organic compounds, including a series ofn-alkanols and various

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