Aldehyde generation includes providing a first input stream, a second input, and an alkene substrate to a reactor system. The first input stream includes a catalyst, a ligand, and an organic solvent. The second input stream includes a mixture of carbon monoxide (CO) and hydrogen gas (H.sub.2). The alkene substrate is in either gaseous form or liquid form, the liquid form of the alkene substrate being provided with the first input stream, the gaseous form of the alkene substrate being provided with the second input stream. The reactor system includes a first reactor and a second reactor, where the second reactor is gas permeable and positioned within the first reactor.

Aldehyde generation includes providing a first input stream, a second input, and an alkene substrate to a reactor system. The first input stream includes a catalyst, a ligand, and an organic solvent. The second input stream includes a mixture of carbon monoxide (CO) and hydrogen gas (H.sub.2). The alkene substrate is in either gaseous form or liquid form, the liquid form of the alkene substrate being provided with the first input stream, the gaseous form of the alkene substrate being provided with the second input stream. The reactor system includes a first reactor and a second reactor, where the second reactor is gas permeable and positioned within the first reactor.

A process for producing propylene in which a first material stream is provided using a steam cracking method and one or more fractionations and is rich in ethylene, in which a second material stream containing carbon monoxide and hydrogen is provided using a synthesis gas production method, and in which at least a part of the ethylene from the first material stream is reacted with at least a part of the carbon monoxide and the hydrogen from the second material stream to form an aldehyde using a hydroformylation to obtain a third material stream, and in which at least a part of the aldehyde in the third material stream is converted to the propylene, wherein the ethylene is provided by means of the steam cracking method in a first component mixture, wherein the propylene is provided in a second component mixture.

A process for producing propylene in which a first material stream is provided using a steam cracking method and one or more fractionations and is rich in ethylene, in which a second material stream containing carbon monoxide and hydrogen is provided using a synthesis gas production method, and in which at least a part of the ethylene from the first material stream is reacted with at least a part of the carbon monoxide and the hydrogen from the second material stream to form an aldehyde using a hydroformylation to obtain a third material stream, and in which at least a part of the aldehyde in the third material stream is converted to the propylene, wherein the ethylene is provided by means of the steam cracking method in a first component mixture, wherein the propylene is provided in a second component mixture.

Catalyst preforming rates during hydroformylation may decrease in the presence of carbonates. Carbonate mitigation methods may comprise treating a hydroformylation reaction product with an aqueous carboxylic acid under oxidizing conditions to form a deactivated catalyst aqueous solution having a pH of about 4 or less, reducing the hydroformylation reaction product to form a reduced reaction product, conveying a gas stream through the reduced reaction product to strip carbon dioxide therefrom, contacting caustic aqueous solution with the stripped reduced reaction product to form partially spent caustic aqueous solution, combining at least a portion of the partially spent caustic aqueous solution with the deactivated catalyst aqueous solution to form a combined aqueous mixture sufficiently acidic to decompose carbonate, and extracting a Group 9 transition metal carboxylate from the combined aqueous mixture into an organic phase.

Catalyst preforming rates during hydroformylation may decrease in the presence of carbonates. Carbonate mitigation methods may comprise treating a hydroformylation reaction product with an aqueous carboxylic acid under oxidizing conditions to form a deactivated catalyst aqueous solution having a pH of about 4 or less, reducing the hydroformylation reaction product to form a reduced reaction product, conveying a gas stream through the reduced reaction product to strip carbon dioxide therefrom, contacting caustic aqueous solution with the stripped reduced reaction product to form partially spent caustic aqueous solution, combining at least a portion of the partially spent caustic aqueous solution with the deactivated catalyst aqueous solution to form a combined aqueous mixture sufficiently acidic to decompose carbonate, and extracting a Group 9 transition metal carboxylate from the combined aqueous mixture into an organic phase.

Low-pressure hydroformylation of diisobutene

A hydroformylation process for preparing 3,5,5-trimethylhexanal comprising reacting 2,4,4-tri-methylpent-2-ene with H.sub.2 and CO in a reaction zone in the presence of one or more free organ-ophosphite ligands of the general formula (1)

##STR00001##

wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are each independently H, C.sub.1- to C.sub.9-alkyl or C.sub.1- to C.sub.9-alkoxy and R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are not H at the same time, and R.sup.6, R.sup.7, R.sup.8, R.sup.9 and R.sup.10 are each independently H, C.sub.1- to C.sub.9-alkyl or C.sub.1- to C.sub.9-alkoxy and R.sup.6, R.sup.7, R.sup.8, R.sup.9 and R.sup.10 are not H at the same time, and R.sup.11, R.sup.12, R.sup.13, R.sup.14 and R.sup.15 are each independently H, C.sub.1- to C.sub.9-alkyl or C.sub.1- to C.sub.9-alkoxy and R.sup.11, R.sup.12, R.sup.13, R.sup.14 and R.sup.15 are not H at the same time, and a homogeneous rhodium catalyst complexed with one or more organophosphite ligands of the general formula (I) at a pressure of 1 to 100 bar abs and a temperature of from 50 to 200° C.

Low-pressure hydroformylation of diisobutene

A hydroformylation process for preparing 3,5,5-trimethylhexanal comprising reacting 2,4,4-tri-methylpent-2-ene with H.sub.2 and CO in a reaction zone in the presence of one or more free organ-ophosphite ligands of the general formula (1)

##STR00001##

wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are each independently H, C.sub.1- to C.sub.9-alkyl or C.sub.1- to C.sub.9-alkoxy and R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are not H at the same time, and R.sup.6, R.sup.7, R.sup.8, R.sup.9 and R.sup.10 are each independently H, C.sub.1- to C.sub.9-alkyl or C.sub.1- to C.sub.9-alkoxy and R.sup.6, R.sup.7, R.sup.8, R.sup.9 and R.sup.10 are not H at the same time, and R.sup.11, R.sup.12, R.sup.13, R.sup.14 and R.sup.15 are each independently H, C.sub.1- to C.sub.9-alkyl or C.sub.1- to C.sub.9-alkoxy and R.sup.11, R.sup.12, R.sup.13, R.sup.14 and R.sup.15 are not H at the same time, and a homogeneous rhodium catalyst complexed with one or more organophosphite ligands of the general formula (I) at a pressure of 1 to 100 bar abs and a temperature of from 50 to 200° C.

Composition of allomones and kairomones derived from the uropygeal gland of ducks and chickens are described, as well as methods to treat Arachnids.

Composition of allomones and kairomones derived from the uropygeal gland of ducks and chickens are described, as well as methods to treat Arachnids.