Coating to inhibit fouling of reactors for cumene hydroperoxide cleavage
AssigneeSabic Global Technologies B.V.
InventorsMark Erik Nelson, Arkady Samuilovich Dykman, Andrey Vladimirovich Zinenkov
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Abstract
The disclosure concerns methods comprising forming a phenol and acetone mixture from decomposition of a cumene hydroperoxide or a phenol, acetone, and AMS from the decomposition of a mixture containing dicumyl peroxide in a system comprising one or more reactors where at least a portion of an inner surface of the one or more reactors has a polymer coating and wherein the coating inhibits build-up of a fouling precipitate on the coated inner surface of the one or more reactors as compared to such build-up in the absence of the coating.
Claims18
A method comprising:
- (a) decomposing a cumene hydroperoxide to form phenol and acetone and to react cumene hydroperoxide with dimethylbenzyl alcohol in the presence of a catalyst mixture to form a dicumyl peroxide mixture in a first stage, wherein the first stage occurs in a first system comprising a reactor;
- and
- (b) forming a phenol, acetone, and α-methylstyrene mixture from decomposition of the dicumyl peroxide mixture formed in the first stage in a second stage, wherein the second stage occurs in a second system comprising a reactor;
- wherein the first and the second systems are connected in series,
- wherein the reactor of the second system has a polymer coating on at least a portion of an inner surface of the reactor,
- wherein a surface energy of the coating is from about 19 to about 31 mN/m, and
- wherein the coating inhibits build-up of a fouling precipitate on the coated inner surface of the reactor of the second system as compared to such build-up in the absence of the coating.
A method comprising
- forming a phenol, acetone, and α-methylstyrene mixture from decomposition of a dicumyl peroxide mixture in a system comprising reactor where at least a portion of an inner surface of the reactor has a polymer coating;
- wherein a surface energy of the coating is from about 19 to about 31 mN/m;
- and
- wherein the coating inhibits build-up of a fouling precipitate on the coated inner surface of the reactor as compared to such build-up in the absence of the coating.
A method comprising:
- applying a coating to at least a portion of an inner surface of reactor to form a coated surface wherein the coating minimizes chemical and physical interactions with phenol molecules;
- and
- wherein the reactor are used in a two stage formation of phenol and acetone from cumene hydroperoxide mixture, and substantially no fouling precipitates are present on the coated surface at the second stage during an operation time from about 80 hours to about 16000 hours.
A system comprising reactor comprising an inner surface, wherein at least a portion of the inner surface has a coating, wherein the coating has a surface energy such that chemical and physical interactions with formed phenol are minimized, wherein a surface energy of the coating is from about 19 to about 31 mN/m, and wherein the system is used for a high throughput two stage method of formation of phenol and acetone from cumene hydroperoxide mixture.
Dependencies are inferred from the claim text.