Provided here are processes and systems for conversion of alkyl-bridged non-condensed alkyl multi-aromatic compounds to alkyl mono-aromatic compounds. One system includes a hydrodearylation reactor adapted to receive a hydrogen stream and a feed stream and to produce a reactor effluent stream in presence of a catalyst. The feed stream contains one or more of heavy alkyl aromatic compounds and one or more alkyl-bridged non-condensed alkyl multi-aromatic compounds. The reactor effluent stream contains one or more alkyl mono-aromatic compounds. The system also includes a first separator fluidly coupled to the hydrodearylation reactor and adapted to receive the reactor effluent stream and to produce a hydrodearylated gas stream and a hydrodearylated liquid stream. The system also includes a second separator fluidly coupled to the first separator and adapted to receive a portion of the hydrodearylated gas stream and to produce a hydrocarbon liquid stream and a vapor stream rich in hydrogen.

The present disclosure is directed to the use of novel crystalline germanosilicate compositions in affecting a range of organic transformations. In particular, the crystalline germanosilicate compositions are extra-large-pore compositions, designated CIT-13 possessing 10- and 14-membered rings.

The present disclosure is directed to the use of novel crystalline germanosilicate compositions in affecting a range of organic transformations. In particular, the crystalline germanosilicate compositions are extra-large-pore compositions, designated CIT-13 possessing 10- and 14-membered rings.

The present invention relates to a process for the separation of aromatic hydrocarbons from a hydrocarbon feed stream comprising contacting a hydrocarbon feed stream with a solvent for aromatics (aromatics solvent) to provide an aromatics-laden solvent stream and subjecting the aromatics-laden solvent stream to solvent regeneration to provide regenerated aromatics solvent and an aromatics stream.

The present invention relates to a process for the separation of aromatic hydrocarbons from a hydrocarbon feed stream comprising contacting a hydrocarbon feed stream with a solvent for aromatics (aromatics solvent) to provide an aromatics-laden solvent stream and subjecting the aromatics-laden solvent stream to solvent regeneration to provide regenerated aromatics solvent and an aromatics stream.

Provided herein are compositions and methods for use of an organosilica material comprising a copolymer of at least one monomer of Formula [R.sup.1R.sup.2SiCH.sub.2].sub.3 (I), wherein, R.sup.1 represents a C.sub.1-C.sub.4 alkoxy group; and R.sup.2 is a C.sub.1-C.sub.4 alkoxy group or a C.sub.1-C.sub.4 alkyl group; and at least one other monomer of Formula [(Z.sup.1O).sub.xZ.sup.2.sub.3-xSiZ.sup.3SZ.sup.4] (II), wherein, Z.sup.1 represents a hydrolysable functional group; Z.sup.2 represents a C.sub.1-C.sub.10 alkyl or aryl group; Z.sup.3 represents a C.sub.2-C.sub.11 cyclic or linear hydrocarbon; Z.sup.4 is either H or O.sub.3H; and x represents any one of integers 1, 2, and 3. The composition may be used as a support material to covalently attach transition metal cations, as a sorbent for olefin/paraffin separations, as a catalyst support for hydrogenation reactions, as a precursor for highly dispersed metal nanoparticles, or as a polar sorbent for crude feeds.

Provided herein are compositions and methods for use of an organosilica material comprising a copolymer of at least one monomer of Formula [R.sup.1R.sup.2SiCH.sub.2].sub.3 (I), wherein, R.sup.1 represents a C.sub.1-C.sub.4 alkoxy group; and R.sup.2 is a C.sub.1-C.sub.4 alkoxy group or a C.sub.1-C.sub.4 alkyl group; and at least one other monomer of Formula [(Z.sup.1O).sub.xZ.sup.2.sub.3-xSiZ.sup.3SZ.sup.4] (II), wherein, Z.sup.1 represents a hydrolysable functional group; Z.sup.2 represents a C.sub.1-C.sub.10 alkyl or aryl group; Z.sup.3 represents a C.sub.2-C.sub.11 cyclic or linear hydrocarbon; Z.sup.4 is either H or O.sub.3H; and x represents any one of integers 1, 2, and 3. The composition may be used as a support material to covalently attach transition metal cations, as a sorbent for olefin/paraffin separations, as a catalyst support for hydrogenation reactions, as a precursor for highly dispersed metal nanoparticles, or as a polar sorbent for crude feeds.

Processes for the recovery of aromatic hydrocarbons from one or more vent gas streams associated with an aromatic complex. The vapor streams are passed to an absorption zone in which an aromatic-selective solvent absorbs the aromatics. The aromatic-selective solvent can be processed along with other solvent extraction streams within the aromatic complex. The absorption zone may be a portion of an existing vessel or column, such as an extractive distillation column or a stabilizer.

Processes for the recovery of aromatic hydrocarbons from one or more vent gas streams associated with an aromatic complex. The vapor streams are passed to an absorption zone in which an aromatic-selective solvent absorbs the aromatics. The aromatic-selective solvent can be processed along with other solvent extraction streams within the aromatic complex. The absorption zone may be a portion of an existing vessel or column, such as an extractive distillation column or a stabilizer.

One-step cyanide-catalyzed benzoin condensations for synthesizing shape persistent cyclobenzoin macrocycles. Selected dialdehydes, and cyanide salts are reacted in aqueous solvents to form such cyclobenzoin macrocycles.