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Browse by Category: Main > Chemistry
Class Information
Number: 585/813
Name: Chemistry of hydrocarbon compounds > Purification, separation, or recovery > By cooling of liquid to obtain solid, e.g., crystallization, etc. > Using specified holding time or specified cooling rate
Description: Subject matter wherein an amount of cooling is claimed as taking place during a claimed period of time or the amount of time during which the mixture or a component thereof is held at a certain temperature or within a certain temperature range is claimed.










Patents under this class:

Patent Number Title Of Patent Date Issued
8232442 Separation method of aromatic compounds comprising simulated moving bed xylene mixture pre--treatment process and additional xylene isomerization process Jul. 31, 2012
7795489 Method for obtaining 2,6-dimethylnaphthalene using isomerization and crystallization processes Sep. 14, 2010
6600083 Para-xylene production process integrating pressure swing adsorption and crystallization Jul. 29, 2003
6399846 Process for production of paraxylene comprising a high-temperature crystallization with at least one stage and a partial melting of the crystals Jun. 4, 2002
6376736 Production of high purity meta-xylene Apr. 23, 2002
6364914 Method of crystallization with the particle size distribution being controlled Apr. 2, 2002
6147272 Process for separating paraxylene comprising at least two crystallization stages at high temperature Nov. 14, 2000
6111161 Process for production of paraxylene comprising a high-temperature crystallization with at least one stage and a partial melting of the crystals Aug. 29, 2000
5948949 Process for producing 2,6-dimethylnaphthalene Sep. 7, 1999
5810892 Method and apparatus for purifying chemical substances Sep. 22, 1998
5811629 Crystallization process for purification of paraxylene Sep. 22, 1998
5516395 Process for the production of collagen foams in the form of continuous tapes and their use in medicine, cosmetics and hygiene May. 14, 1996
5264653 Process for purifying 1,1,3,4,4,6-hexamethyltetralin Nov. 23, 1993
4900717 Recovery of 2,6-dialkyl-naphthalene isomers Feb. 13, 1990











 
 
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