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Class Information
Number: 585/479
Name: Chemistry of hydrocarbon compounds > Aromatic compound synthesis > By isomerization > With plural separation steps > Including a crystallization step
Description: Subject matter wherein one or more of the plural separation steps involves chilling a mixture to solidify a component of the mixture.










Patents under this class:

Patent Number Title Of Patent Date Issued
8431763 Separation method of aromatic compounds comprising simulated moving bed xylene mixture pre-treatment process and additional xylene isomerization process Apr. 30, 2013
8323581 Apparatus for separating para-xylene from a mixture of C8 and C9 aromatic hydrocarbons Dec. 4, 2012
8232442 Separation method of aromatic compounds comprising simulated moving bed xylene mixture pre--treatment process and additional xylene isomerization process Jul. 31, 2012
7972568 Apparatus for separating para-xylene from a mixture of C8 and C9 aromatic hydrocarbons Jul. 5, 2011
7727490 Aromatic production apparatus Jun. 1, 2010
7686946 Method of altering a feed to a reaction zone Mar. 30, 2010
7592499 Process for co-producing para-xylene and styrene Sep. 22, 2009
6867339 Process for producing p-xylene Mar. 15, 2005
6528695 Process for the production of an isomer of xylenes in three stages: separation, isomerization in the presence of a catalyst based on an EUO zeolite and transalkylation Mar. 4, 2003
6512154 Production of a xylene isomer in three stages: separation, isomerization with a catalyst with an EUO zeolite base and transalkylation with recycling of C10-aromatic compounds Jan. 28, 2003
6492525 Organometallic complexes comprising cationic heterocyclic carbenes Dec. 10, 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
6342649 Method for removing ethylbenzene from a para-xylene feed stream Jan. 29, 2002
6198014 Process for isomerizing aromatic compounds containing eight carbon atoms comprising a recycle Mar. 6, 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
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
6057487 Method for producing 2,6-DMN from mixed dimethylnaphthalenes by crystallization, adsorption and isomerization May. 2, 2000
6005156 Para-xylene separation process comprising pretreatment by selective hydrogenation and by activated clay Dec. 21, 1999
5977420 Dual-loop xylene isomerization process Nov. 2, 1999
5948949 Process for producing 2,6-dimethylnaphthalene Sep. 7, 1999
5922924 Process for the separation of p-xylene in C.sub.8 aromatic hydrocarbons with a simulated moving bed adsorption and a crystallization Jul. 13, 1999
5744670 Process for preparing dialkylnaphthalene Apr. 28, 1998
5329060 Integrated selective adsorption and crystallization process for para-xylene recovery Jul. 12, 1994
5254769 Method of isomerization of dimethylnaphthalenes Oct. 19, 1993
4482773 Catalyst for xylene isomerization Nov. 13, 1984
4376223 Method for promoting aluminum chloride catalyzed isomerization of sym octahydrophenanthrene to sym-octahydroanthracene with aryl phenone Mar. 8, 1983
4101597 Recovery of p-xylene and benzene from eight carbon atom aromatic fractions Jul. 18, 1978
3997616 Process for the preparation of alkylteralins Dec. 14, 1976
3959978 Separation process by fractional crystallization Jun. 1, 1976
3957896 Process for preparing 2,6-dimethylnaphthalenes May. 18, 1976
3939221 Xylenes separation process Feb. 17, 1976











 
 
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