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Class Information
Number: 585/812
Name: Chemistry of hydrocarbon compounds > Purification, separation, or recovery > By cooling of liquid to obtain solid, e.g., crystallization, etc.
Description: Subject matter wherein the purification, separation, or recovery process includes lowering the temperature of a liquid mixture, containing a hydrocarbon to be recovered, to cause one or more components of the mixture to solidify.

Sub-classes under this class:

Class Number Class Name Patents
585/813 Using specified holding time or specified cooling rate 14
585/816 With addition of extraneous material 28
585/815 With dissolving or plural serial crystallizations 33
585/814 With treatment of mother liquor after crystal separation 39

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8575412 Processes for preparing triphenylene Nov. 5, 2013
8530716 Melt-crystallization separation and purification process Sep. 10, 2013
8507744 Process for the purification of paraxylene Aug. 13, 2013
8502008 Process and apparatus for para-xylene production Aug. 6, 2013
8293963 Process for the crystallization separation of P-xylene Oct. 23, 2012
8283510 Process and apparatus for para-xylene production Oct. 9, 2012
8252967 Process for the purification of paraxylene Aug. 28, 2012
8232442 Separation method of aromatic compounds comprising simulated moving bed xylene mixture pre--treatment process and additional xylene isomerization process Jul. 31, 2012
8211319 Solid-liquid separation process Jul. 3, 2012
8163970 Method for adiabatic cooling type crystallization of organic compound and apparatus therefor Apr. 24, 2012
8084657 Integrated process for the production of P-xylene Dec. 27, 2011
8030533 Method for combined production of paraxylene and benzene with improved productivity Oct. 4, 2011
7999120 Process for continuously removing a target product X in the form of fine crystals Aug. 16, 2011
7989672 Process and apparatus for para-xylene production Aug. 2, 2011
7928276 Process for producing high purity meta-xylene, comprising simulated moving bed adsorption and crystallization Apr. 19, 2011
7812206 Apparatus and process for the separation of solids and liquids Oct. 12, 2010
7649124 Simulated moving bed adsorptive separation process using a plurality of adsorption chambers in parallel and crystallizer and device used therein Jan. 19, 2010
7605296 Method for separating and purifying 2,6-dimethylnaphthalene Oct. 20, 2009
7540884 Method for performing the purifying separation of crystals out their suspension in a mother liquor Jun. 2, 2009
7405340 Process for recovering paraxylene utilizing ammonia absorption refrigeration Jul. 29, 2008
7381855 Process for producing adamantane Jun. 3, 2008
7261810 Method and system for transporting flows of fluid hydrocarbons containing wax, asphaltenes, and/or other precipitating solids Aug. 28, 2007
7094937 Compositions comprising cyclohexamantane Aug. 22, 2006
6894202 Method for producing 2,6-dimethylnaphthalene May. 17, 2005
6843851 Compositions comprising pentamantanes and processes for their separation Jan. 18, 2005
6841714 Process for co-production of paraxylene, metaxylene and/or orthoxylene Jan. 11, 2005
6838588 Process for co-producing para-xylene and metaxylene, comprising two separation steps Jan. 4, 2005
6828470 Coproduction process for para-xylene and ortho-xylene comprising two separation steps Dec. 7, 2004
6737558 Process for the separation of 2,6-dimethylnaphthalene from mixtures containing it May. 18, 2004
6600083 Para-xylene production process integrating pressure swing adsorption and crystallization Jul. 29, 2003
6566410 Methods of demulsifying emulsions using carbon dioxide May. 20, 2003
6525235 Method for manufacturing 2,6-dimethylnaphthalene Feb. 25, 2003
6413480 Method of separation of hydrocarbon oils from a waxy feedstock and separation system for implementation of said method Jul. 2, 2002
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
6383233 Separation process May. 7, 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
6291735 Process for preparation of high-purity indene Sep. 18, 2001
6194609 Crystallization in a plate heat exchanger Feb. 27, 2001
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
6074441 Process for producing ultrafine-crystallization products Jun. 13, 2000
6072098 Process for producing highly pure 2,6-dimethylnaphthalene Jun. 6, 2000
6063978 Process for separating paraxylene comprising at least one crystallization stage at high temperature and at least one clay treatment upstream from the adsorption zone May. 16, 2000
6060634 Production of para-xylene from an effluent from paraselective toluene disproportionation using a crystallization process combined with simulated moving bed adsorption May. 9, 2000
6056791 Process for the production of particles or powders May. 2, 2000
6057487 Method for producing 2,6-DMN from mixed dimethylnaphthalenes by crystallization, adsorption and isomerization May. 2, 2000
6004452 Process for converting hydrocarbon feed to high purity benzene and high purity paraxylene Dec. 21, 1999
5977426 Crystallization of 2,6-dimethylnaphthalene Nov. 2, 1999
5948949 Process for producing 2,6-dimethylnaphthalene Sep. 7, 1999

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