Ageing of spherulites of an industrial relevant aromatic amine derivative
Polycrystalline spherulites of an aromatic amine derivative have been precipitated in a batch process by pH‐shift with hydrochloric acid from stirred aqueous solutions. The time dependent behaviour of the spherulites has been studied during crystallization in the temperature range from 5 °C to 60 °C...
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| Veröffentlicht in: | Crystal research and technology (1979) 2010-02, Vol.45 (2), p.204-212 |
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| container_title | Crystal research and technology (1979) |
| container_volume | 45 |
| creator | Beck, R. Heskestad, R. Malthe-Sørenssen, D. Häkkinen, A. Louhi-Kultanen, M. Andreassen, J.-P. |
| description | Polycrystalline spherulites of an aromatic amine derivative have been precipitated in a batch process by pH‐shift with hydrochloric acid from stirred aqueous solutions. The time dependent behaviour of the spherulites has been studied during crystallization in the temperature range from 5 °C to 60 °C. Cake resistance values have been obtained from batch filtration tests performed at 2 bar pressure difference at different stages of the crystallization process. The FBRM mean chord length of the crystals decreases with time as a result of crystal ageing into plate‐like crystals. The rate of the ageing process increases with temperature. XRD‐studies show no significant differences in the crystal structure during the ageing process, and the mechanism of the transformation was not established. The filterability of aromatic amine crystals deteriorates as the crystallization progresses. The decrease in the filterability is attributed to the appearance of small plate‐like crystals and a change in the interaction between the crystal surface and the solution, during the ageing of the particles. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) |
| doi_str_mv | 10.1002/crat.200900665 |
| format | Article |
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The time dependent behaviour of the spherulites has been studied during crystallization in the temperature range from 5 °C to 60 °C. Cake resistance values have been obtained from batch filtration tests performed at 2 bar pressure difference at different stages of the crystallization process. The FBRM mean chord length of the crystals decreases with time as a result of crystal ageing into plate‐like crystals. The rate of the ageing process increases with temperature. XRD‐studies show no significant differences in the crystal structure during the ageing process, and the mechanism of the transformation was not established. The filterability of aromatic amine crystals deteriorates as the crystallization progresses. The decrease in the filterability is attributed to the appearance of small plate‐like crystals and a change in the interaction between the crystal surface and the solution, during the ageing of the particles. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)</description><identifier>ISSN: 0232-1300</identifier><identifier>EISSN: 1521-4079</identifier><identifier>DOI: 10.1002/crat.200900665</identifier><language>eng</language><publisher>Berlin: WILEY-VCH Verlag</publisher><subject>Aging ; Amines ; aromatic amine ; constant pressure cake filtration ; Crystal surfaces ; Crystallization ; Crystals ; Derivatives ; FBRM chord length distribution ; Filterability ; polycrystalline ; Spherulites</subject><ispartof>Crystal research and technology (1979), 2010-02, Vol.45 (2), p.204-212</ispartof><rights>Copyright © 2010 WILEY‐VCH Verlag GmbH & Co. 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Res. Technol</addtitle><description>Polycrystalline spherulites of an aromatic amine derivative have been precipitated in a batch process by pH‐shift with hydrochloric acid from stirred aqueous solutions. The time dependent behaviour of the spherulites has been studied during crystallization in the temperature range from 5 °C to 60 °C. Cake resistance values have been obtained from batch filtration tests performed at 2 bar pressure difference at different stages of the crystallization process. The FBRM mean chord length of the crystals decreases with time as a result of crystal ageing into plate‐like crystals. The rate of the ageing process increases with temperature. XRD‐studies show no significant differences in the crystal structure during the ageing process, and the mechanism of the transformation was not established. The filterability of aromatic amine crystals deteriorates as the crystallization progresses. The decrease in the filterability is attributed to the appearance of small plate‐like crystals and a change in the interaction between the crystal surface and the solution, during the ageing of the particles. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)</description><subject>Aging</subject><subject>Amines</subject><subject>aromatic amine</subject><subject>constant pressure cake filtration</subject><subject>Crystal surfaces</subject><subject>Crystallization</subject><subject>Crystals</subject><subject>Derivatives</subject><subject>FBRM chord length distribution</subject><subject>Filterability</subject><subject>polycrystalline</subject><subject>Spherulites</subject><issn>0232-1300</issn><issn>1521-4079</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><recordid>eNqFkM1LwzAchoMoOKdXz7156sxHkzTHMZwbjAkymbeQNr_OaD9m0k3339tRGd48vbzwPO_hReiW4BHBmN7n3rQjirHCWAh-hgaEUxInWKpzNMCU0ZgwjC_RVQjvuMNEQgdoPt6AqzdRU0Rh-wZ-V7oWwrGaOnK13YXWO1NGHkrYm7qNjG8q07o8MpWrIbLg3b7re7hGF4UpA9z85hC9TB9Wk1m8eHqcT8aLOGdc8ZgZzrKMKZZakqmEZ8rkIsOJYJalqaWKiy6sobQoOtISC9gm0kiigNJcsSG663e3vvncQWh15UIOZWlqaHZBS84EJ0TJjhz1ZO6bEDwUeutdZfxBE6yPl-njZfp0WSeoXvhyJRz-ofXkebz668a960IL3yfX-A8tJJNcr5ePekbWS5zKVz1lP9Mgf6k</recordid><startdate>201002</startdate><enddate>201002</enddate><creator>Beck, R.</creator><creator>Heskestad, R.</creator><creator>Malthe-Sørenssen, D.</creator><creator>Häkkinen, A.</creator><creator>Louhi-Kultanen, M.</creator><creator>Andreassen, J.-P.</creator><general>WILEY-VCH Verlag</general><general>WILEY‐VCH Verlag</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>201002</creationdate><title>Ageing of spherulites of an industrial relevant aromatic amine derivative</title><author>Beck, R. ; Heskestad, R. ; Malthe-Sørenssen, D. ; Häkkinen, A. ; Louhi-Kultanen, M. ; Andreassen, J.-P.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3595-3a53bb3938d1b945b9ac6b0463d388d295688dda22ff53bd1de0d47a719e22c93</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Aging</topic><topic>Amines</topic><topic>aromatic amine</topic><topic>constant pressure cake filtration</topic><topic>Crystal surfaces</topic><topic>Crystallization</topic><topic>Crystals</topic><topic>Derivatives</topic><topic>FBRM chord length distribution</topic><topic>Filterability</topic><topic>polycrystalline</topic><topic>Spherulites</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Beck, R.</creatorcontrib><creatorcontrib>Heskestad, R.</creatorcontrib><creatorcontrib>Malthe-Sørenssen, D.</creatorcontrib><creatorcontrib>Häkkinen, A.</creatorcontrib><creatorcontrib>Louhi-Kultanen, M.</creatorcontrib><creatorcontrib>Andreassen, J.-P.</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Crystal research and technology (1979)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Beck, R.</au><au>Heskestad, R.</au><au>Malthe-Sørenssen, D.</au><au>Häkkinen, A.</au><au>Louhi-Kultanen, M.</au><au>Andreassen, J.-P.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Ageing of spherulites of an industrial relevant aromatic amine derivative</atitle><jtitle>Crystal research and technology (1979)</jtitle><addtitle>Cryst. Res. Technol</addtitle><date>2010-02</date><risdate>2010</risdate><volume>45</volume><issue>2</issue><spage>204</spage><epage>212</epage><pages>204-212</pages><issn>0232-1300</issn><eissn>1521-4079</eissn><abstract>Polycrystalline spherulites of an aromatic amine derivative have been precipitated in a batch process by pH‐shift with hydrochloric acid from stirred aqueous solutions. The time dependent behaviour of the spherulites has been studied during crystallization in the temperature range from 5 °C to 60 °C. Cake resistance values have been obtained from batch filtration tests performed at 2 bar pressure difference at different stages of the crystallization process. The FBRM mean chord length of the crystals decreases with time as a result of crystal ageing into plate‐like crystals. The rate of the ageing process increases with temperature. XRD‐studies show no significant differences in the crystal structure during the ageing process, and the mechanism of the transformation was not established. The filterability of aromatic amine crystals deteriorates as the crystallization progresses. The decrease in the filterability is attributed to the appearance of small plate‐like crystals and a change in the interaction between the crystal surface and the solution, during the ageing of the particles. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)</abstract><cop>Berlin</cop><pub>WILEY-VCH Verlag</pub><doi>10.1002/crat.200900665</doi><tpages>9</tpages></addata></record> |
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| ispartof | Crystal research and technology (1979), 2010-02, Vol.45 (2), p.204-212 |
| issn | 0232-1300 1521-4079 |
| language | eng |
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| source | Wiley Online Library All Journals |
| subjects | Aging Amines aromatic amine constant pressure cake filtration Crystal surfaces Crystallization Crystals Derivatives FBRM chord length distribution Filterability polycrystalline Spherulites |
| title | Ageing of spherulites of an industrial relevant aromatic amine derivative |
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