General Electric Company

Richard Anthony Battista

Eric James Pressman

John Yaw Ofori

Kirill Vladimirovich Shalyaev

Eric Douglas Williams

James G Bennett, Jr

John J Kokoszka

Freddie L Tungate

Phillip Oscar Moreno

Bruce Fletcher Johnson

William E Smith

Ben Purushotam Patel

Robert L Tatterson

Francis S Lo

A process for catalytic production of diaryl carbonates by oxidative carbonylation of aromatic hydroxy compounds with carbon monoxide and oxygen achieves water removal during reaction by a process comprising the steps of: removing a liquid stream from an oxidative carbonylation reaction mixture in a reaction vessel and transferring the stream to a disengagement vessel, transferring a stream from the disengagement vessel to a flash vessel and subjecting the liquid stream to reduced pressure, and returning at least a portion of dried liquid stream to the reaction vessel. Typical catalyst systems for oxidative carbonylation contain (A) at least one Group 8, 9, or 10 metal having an atomic number of at least 44 or a compound thereof; (B) at least one guanidinium salt or onium salt; (C) at least one metal co-catalyst; and (D) at least one base.

Process for the production of diaryl carbonates

A process for catalytic production of diaryl carbonates by oxidative carbonylation of aromatic hydroxy compounds with carbon monoxide and oxygen achieves water removal during reaction by a process comprising the steps of: removing a liquid stream from an oxidative carbonylation reaction mixture in a reaction vessel, subjecting the liquid stream to reduced pressure, and returning at least a portion of dried liquid stream to the reaction vessel. Typical catalyst systems for oxidative carbonylation contain (A) at least one Group 8, 9, or 10 metal having an atomic number of at least 44 or a compound thereof; (B) at least one alkali metal salt; (C) at least one metal co-catalyst; (D) at least one activating organic solvent; and (E) optionally, at least one base.

A process for catalytic production of diaryl carbonates by oxidative carbonylation of aromatic hydroxy compounds with carbon monoxide and oxygen achieves water removal during reaction by a process comprising the steps of: removing a liquid stream from an oxidative carbonylation reaction mixture in a reaction vessel, subjecting the liquid stream to reduced pressure, and returning at least a portion of dried liquid stream to the reaction vessel. Typical catalyst systems for oxidative carbonylation contain (A) at least one Group 8, 9, or 10 metal having an atomic number of at least 44 or a compound thereof; (B) at least one guanidinium salt or onium salt; and (C) at least one metal co-catalyst.

Bromide source such as alkali metal bromide, alkaline earth metal bromide, or onium bromide, present as part of a catalyst mixture in an organic oxidative carbonylation mixture further comprising diaryl carbonate and a hydroxyaromatic compound, is often at least partially converted to organic bromide such as bromophenols. The bromide source can be recycled after reaction through treatment with an aqueous acidic bromide solution such as hydrogen bromide, preferably after removal of a major proportion of hydroxyaromatic compound such as phenol.

Method for recycle of bromide-containing catalyst constituents

An improved method for producing an aromatic carbonate by reacting an aromatic hydroxy compound, carbon monoxide and oxygen in the presence of a catalyst system comprising at least one of palladium or a palladium compound; at least one lead compound; at least one halide source; and at least one desiccant, wherein the ratio of equivalents of lead co-catalyst relative to equivalents of palladium catalyst is optimized to increase reaction rate, as well as to allow production of aromatic carbonate in an economically feasible continuous process.

Method for making aromatic carbonates

An improved continuous process for removal of water from a process for producing organic carbonates, particularly diphenyl carbonate, by treating the water containing products of the reaction with a condensable stripping agent in a gaseous state and recycling a major portion of the water poor reaction products back to the reaction for producing the organic carbonate. The stripping agent, preferably n-pentane, is condensed upon removal from the water stripping step and recycled back to the water stripping step.

Process for the isolation and removal of unwanted water from a chemical

A catalyst precursor comprising a magnesium compound or material, optionally also containing other metal compounds, is activated for use by calcining at an elevated temperature in the presence of air or nitrogen, or under vacuum. The active catalyst which results may be used in processes for the ortho-alkylation of phenolic compounds, with good yields of and selectivity to the ortho-alkylated end product.

Magnesium-containing catalyst activated under vacuum, in nitrogen, or in

A catalyst precursor prepared by precipitating manganese hydroxide from caustic solution and then mixing the precipitate with a magnesium-containing material is described. The catalyst precursor can be calcined to an active form, and the resulting catalyst can be used to effect or facilitate the ortho-alkylation of phenolic compounds in vapor phase reactions. Superiority of performance is demonstrated with respect to a catalyst derived from a precursor in which manganese hydroxide is precipitated (sometimes referred to as 'co-precipitation') in the presence of a magnesium compound, rather than formed separately. y

Catalyst derived from mixture of manganese hydroxide and

An improved catalytic process for selectively ortho-alkylating a phenolic compound which comprises reacting a phenolic compound with an alcohol, optionally in the presence of water, and a catalyst composite consisting essentially of the calcination residue obtained from heating an admixture of magnesium carbonate and/or magnesium hydroxide and a manganese compound.

Catalytic process for preparation of ortho-alkylated phenols

Disclosed are a catalyst comprising a magnesium-containing moiety, a method for preparing the catalyst, and a process for the vapor phase ortho-alkylation of phenols in the presence of the catalyst.

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Schenectady, NY, United States of America

Richard Anthony Battista