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Class Information
Number: 585/816
Name: Chemistry of hydrocarbon compounds > Purification, separation, or recovery > By cooling of liquid to obtain solid, e.g., crystallization, etc. > With addition of extraneous material
Description: Subject matter in which a material from an outside source is added to the hydrocarbon to be recovered to perfect the solidification procedure, e.g., by washing the resulting solids, etc.










Sub-classes under this class:

Class Number Class Name Patents
585/817 Before crystal formation 24


Patents under this class:

Patent Number Title Of Patent Date Issued
8502008 Process and apparatus for para-xylene production Aug. 6, 2013
8283510 Process and apparatus for para-xylene production Oct. 9, 2012
8163970 Method for adiabatic cooling type crystallization of organic compound and apparatus therefor Apr. 24, 2012
7989672 Process and apparatus for para-xylene production Aug. 2, 2011
7795489 Method for obtaining 2,6-dimethylnaphthalene using isomerization and crystallization processes Sep. 14, 2010
7605296 Method for separating and purifying 2,6-dimethylnaphthalene Oct. 20, 2009
6894202 Method for producing 2,6-dimethylnaphthalene May. 17, 2005
6737558 Process for the separation of 2,6-dimethylnaphthalene from mixtures containing it May. 18, 2004
6525235 Method for manufacturing 2,6-dimethylnaphthalene Feb. 25, 2003
6383233 Separation process May. 7, 2002
6074441 Process for producing ultrafine-crystallization products Jun. 13, 2000
6072098 Process for producing highly pure 2,6-dimethylnaphthalene Jun. 6, 2000
5948949 Process for producing 2,6-dimethylnaphthalene Sep. 7, 1999
5718733 Method for accelerating solidification of low melting point products Feb. 17, 1998
5498822 Single temperature stage crystallization of paraxylene Mar. 12, 1996
5447541 Process for separating and purifying substances by crystallization from the melt under high pressure Sep. 5, 1995
5447542 Process for separating and purifying substances by crystallization from the melt Sep. 5, 1995
5409505 Method and apparatus for crystallization of organic matter Apr. 25, 1995
5264653 Process for purifying 1,1,3,4,4,6-hexamethyltetralin Nov. 23, 1993
5055630 Process for making p-xylene with a purity of more than 99.8% by weight Oct. 8, 1991
4956520 Separation process Sep. 11, 1990
4952750 Process for making p-xylene with a purity of at least 99.5% Aug. 28, 1990
4727218 Procedure and means for separating or purifying organic substances Feb. 23, 1988
4331826 Process for separating p-xylene from a hydrocarbon mixture May. 25, 1982
4313012 Producing anthracene from creosote Jan. 26, 1982
4093672 Process for the recovery of ultrahigh purity indene Jun. 6, 1978
3963795 Separation of isomers by selective melting in an immiscible liquid Jun. 15, 1976
3959978 Separation process by fractional crystallization Jun. 1, 1976











 
 
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