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Class Information
Number: 585/863
Name: Chemistry of hydrocarbon compounds > Purification, separation, or recovery > By addition of extraneous agent, e.g., solvent, etc. > N-containing > Interaction with aromatic
Description: Subject matter wherein the purification or separation is accomplished by interengagement of an agent with an aromatic compound, e.g., by reaching therewith dissolving it, etc.










Patents under this class:

Patent Number Title Of Patent Date Issued
7572948 Fulvene purification Aug. 11, 2009
7202391 Process for inhibiting polymerization of an aromatic vinyl compound Apr. 10, 2007
6689926 Process for purifying styrene monomer feedstock prior to polymerization Feb. 10, 2004
6441264 Method for separating benzothiophene compounds from hydrocarbon mixture containing them, and hydrocarbon mixture obtained by said method Aug. 27, 2002
6100439 Styrene caustic wash extraction aid Aug. 8, 2000
6033529 Separation of mesitylene from 4-ethyl toluene by azeotropic distillation Mar. 7, 2000
6007707 Process for the recovery of pure hydrocarbons from a hydrocarbon mixture Dec. 28, 1999
5965784 Process and apparatus for extracting aromatic compounds contained in a hydrocarbon feedstock Oct. 12, 1999
5922193 Addition of ethers or aldehydes to furfural for aromatic extractions Jul. 13, 1999
5877385 Process including extractive distillation and/or dehydrogenation to produce styrene from petroleum feedstock including ethyl-benzene/xylene mixtures Mar. 2, 1999
5849982 Recovery of styrene from pyrolysis gasoline by extractive distillation Dec. 15, 1998
5120900 Integrated solvent extraction/membrane extraction with retentate recycle for improved raffinate yield Jun. 9, 1992
5107055 Method for simultaneous recovery of pure benzene and pure toluene Apr. 21, 1992
5095170 Intergrated membrane pre-extraction/solvent extraction of distillates Mar. 10, 1992
5059742 Process for separating 2,6-dimethylnaphthalene Oct. 22, 1991
4997547 Method for the production of an aromate concentrate suitable for use as blending component for fuel Mar. 5, 1991
4940832 Process for separating 2,6-dimethylnaphthalene Jul. 10, 1990
4359596 Liquid salt extraction of aromatics from process feed streams Nov. 16, 1982
4316796 Process for the separation of dienic and/or aromatic hydrocarbons present in hydrocarbon fractions Feb. 23, 1982
4278505 Process of recovering an n-hexane product which is free from aromatic compounds Jul. 14, 1981
4097371 Separation of fluid mixtures Jun. 27, 1978
4087355 Solvent extraction of aromatic hydrocarbons May. 2, 1978
4080327 13-Oxatetracyclo[8.2.1.sup.2,9.0.0.sup.3,8 ]tridec-5-ene-1,5,6,10-tetracarbonitrile and separation of its monocyclic aromatic clathrates Mar. 21, 1978
4073819 2,6-Dimethylnaphthalene extraction process Feb. 14, 1978
4061545 Polymerization inhibitor for vinyl aromatic compounds Dec. 6, 1977
4045332 Solvent extraction Aug. 30, 1977
4031153 Separation of styrene from xylenes Jun. 21, 1977
4001107 Morpholinones as selective solvents for aromatic hydrocarbons Jan. 4, 1977
3944483 Distillative recovery of aromatics with water addition in azeotropic proportions Mar. 16, 1976
3936509 Process for separating dimethyl naphthalenes comprising 2,6-dimethyl naphthalenes as main component Feb. 3, 1976











 
 
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