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Class Information
Number: 585/815
Name: Chemistry of hydrocarbon compounds > Purification, separation, or recovery > By cooling of liquid to obtain solid, e.g., crystallization, etc. > With dissolving or plural serial crystallizations
Description: Subject matter wherein the starting mixture or a solid produced in the process is dissolved in a liquid or in which a component of a liquid mixture is chilled to form a solid, the solid is liquefied and the resulting liquid is again chilled to form a solid component.










Patents under this class:

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
8431763 Separation method of aromatic compounds comprising simulated moving bed xylene mixture pre-treatment process and additional xylene isomerization process Apr. 30, 2013
8232442 Separation method of aromatic compounds comprising simulated moving bed xylene mixture pre--treatment process and additional xylene isomerization process Jul. 31, 2012
8163970 Method for adiabatic cooling type crystallization of organic compound and apparatus therefor Apr. 24, 2012
7795489 Method for obtaining 2,6-dimethylnaphthalene using isomerization and crystallization processes Sep. 14, 2010
6894202 Method for producing 2,6-dimethylnaphthalene May. 17, 2005
6600083 Para-xylene production process integrating pressure swing adsorption and crystallization Jul. 29, 2003
6525235 Method for manufacturing 2,6-dimethylnaphthalene Feb. 25, 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
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
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
5866740 Production of para-xylene from an effluent from paraselective toluene disproportionation using a crystallization process combined with simulated moving bed adsorption Feb. 2, 1999
5811629 Crystallization process for purification of paraxylene Sep. 22, 1998
5466266 Closed system multistage superpurification recrystallization Nov. 14, 1995
5414189 Isolation of high purity diamondoid fractions and components May. 9, 1995
5329061 Crystallization process for para-xylene recovery using two-stage recovery section Jul. 12, 1994
5329060 Integrated selective adsorption and crystallization process for para-xylene recovery Jul. 12, 1994
5264653 Process for purifying 1,1,3,4,4,6-hexamethyltetralin Nov. 23, 1993
5062862 Process and apparatus for recovering a pure substance from a liquid mixture by crystallization Nov. 5, 1991
5004860 Filter system Apr. 2, 1991
4956520 Separation process Sep. 11, 1990
4727218 Procedure and means for separating or purifying organic substances Feb. 23, 1988
4666456 Process for the continuous partial crystallization and the separation of a liquid mixture May. 19, 1987
4552575 Method for the mass separation of a liquid mixture through fractional crystallization Nov. 12, 1985
4196042 Corrugated interface zone refiner Apr. 1, 1980
4070409 Process for recovering anthracene Jan. 24, 1978
4025573 Separation process May. 24, 1977
3996031 Fractionation of multicomponent dimethylnaphthelenes feeds by selective crystallization Dec. 7, 1976
3959978 Separation process by fractional crystallization Jun. 1, 1976











 
 
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