A study was made of solvent extraction of \"Leonardite\" obtained from the Slack Seam of the Baukol-Noonan coal company, Divide County, Worth Dakota. Apparatus and method are described for the treatment of the Leonardite, the determination of extraction yields, and the separation of products. A detailed analysis of the products obtained is presented, with temperature as a variable.
Reduction in particle size, increase in the ratio of tetralin- Leonardite, agitation, time, and temperature were found to be important factors in the extraction. Considerable increase in yield resulted from increasing the temperature up to 4k0° C. With tetralin as solvent, under most favorable conditions, a maximum of jk.6 per cent based on moisture-ash-free Leonardite has been made soluble.
The residue obtained from this treatment under most favorable conditions showed considerable changes from the Leonardite sample. A major portion of the C=0 group in the Leonardite was eliminated by this treatment, and the residue was found to contain CH3 and CH2 groups.
","abstract_html":"<p>A study was made of solvent extraction of "Leonardite" obtained from the Slack Seam of the Baukol-Noonan coal company, Divide County, Worth Dakota. Apparatus and method are described for the treatment of the Leonardite, the determination of extraction yields, and the separation of products. A detailed analysis of the products obtained is presented, with temperature as a variable.</p><p>Reduction in particle size, increase in the ratio of tetralin- Leonardite, agitation, time, and temperature were found to be important factors in the extraction. Considerable increase in yield resulted from increasing the temperature up to 4k0° C. With tetralin as solvent, under most favorable conditions, a maximum of jk.6 per cent based on moisture-ash-free Leonardite has been made soluble.</p><p>The residue obtained from this treatment under most favorable conditions showed considerable changes from the Leonardite sample. A major portion of the C=0 group in the Leonardite was eliminated by this treatment, and the residue was found to contain CH3 and CH2 groups.<p>","abstract_has_math":false,"creators":["Nallaperumal, Ulaganathan"],"institution":null,"degree_name":"Master of Science (MS)","degree_level":"Thesis","degree_discipline":"Chemistry","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1959,"date_issued":"1959-01-01T08:00:00Z","date_published":"1959-01-01T08:00:00Z","updated_at":"2026-07-24T03:25:30Z","subjects":[],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://commons.und.edu/theses/551","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Nallaperumal, Ulaganathan"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"thesis:degree_discipline","label":"Discipline","values":["Chemistry"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science (MS)"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://commons.und.edu/theses/551"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["
A study was made of solvent extraction of \"Leonardite\" obtained from the Slack Seam of the Baukol-Noonan coal company, Divide County, Worth Dakota. Apparatus and method are described for the treatment of the Leonardite, the determination of extraction yields, and the separation of products. A detailed analysis of the products obtained is presented, with temperature as a variable.
Reduction in particle size, increase in the ratio of tetralin- Leonardite, agitation, time, and temperature were found to be important factors in the extraction. Considerable increase in yield resulted from increasing the temperature up to 4k0° C. With tetralin as solvent, under most favorable conditions, a maximum of jk.6 per cent based on moisture-ash-free Leonardite has been made soluble.
The residue obtained from this treatment under most favorable conditions showed considerable changes from the Leonardite sample. A major portion of the C=0 group in the Leonardite was eliminated by this treatment, and the residue was found to contain CH3 and CH2 groups.
"]},{"key":"dc:title","label":"Title","values":["Studies on Thermal Solution of Low-Rank Fuels"]}]}],"canonical_facts":{"dc:creator":["Nallaperumal, Ulaganathan"],"dc:description.abstract":["
A study was made of solvent extraction of \"Leonardite\" obtained from the Slack Seam of the Baukol-Noonan coal company, Divide County, Worth Dakota. Apparatus and method are described for the treatment of the Leonardite, the determination of extraction yields, and the separation of products. A detailed analysis of the products obtained is presented, with temperature as a variable.
Reduction in particle size, increase in the ratio of tetralin- Leonardite, agitation, time, and temperature were found to be important factors in the extraction. Considerable increase in yield resulted from increasing the temperature up to 4k0° C. With tetralin as solvent, under most favorable conditions, a maximum of jk.6 per cent based on moisture-ash-free Leonardite has been made soluble.
The residue obtained from this treatment under most favorable conditions showed considerable changes from the Leonardite sample. A major portion of the C=0 group in the Leonardite was eliminated by this treatment, and the residue was found to contain CH3 and CH2 groups.
"],"dc:identifier":["https://commons.und.edu/theses/551"],"dc:title":["Studies on Thermal Solution of Low-Rank Fuels"],"thesis:degree_discipline":["Chemistry"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["Master of Science (MS)"]},"updated_at":"2026-07-24T03:25:30Z"}