Method for manufacture of faujasite zeolite including zeolite Y in the presence of ODSO
The present disclosure is directed to a method of manufacture of faujasite zeolite including zeolite Y. A sol-gel formulation includes a water-soluble fraction of ODSO as an additional component. The resulting products include faujasite zeolite, and yields can be increased relative to comparable sol-gel formulations without ODSO.
1 . A method for synthesis of faujasite zeolite comprising:
forming a homogeneous aqueous mixture of a silica source, an aluminum source, an alkali metal source, water and an effective amount of water-soluble oxidized disulfide oil (ODSO); and
heating the homogeneous aqueous mixture under conditions and for a time effective to form a precipitate suspended in a supernatant as an intermediate suspension, wherein the precipitate comprises faujasite zeolite.
2 . The method as in claim 1 , wherein
a cumulative amount of ODSO and water is approximately equivalent to an amount of water that is effective to produce faujasite zeolite in the absence of ODSO;
the cumulative amount of ODSO and water, an amount of the silica source, an amount of the aluminum source, and an amount of the alkali metal source are provided at an ODSO-enhanced compositional ratio;
the ODSO-enhanced compositional ratio is approximately equivalent to a baseline compositional ratio of water, silica, aluminum and alkali metal that is effective to produce faujasite zeolite in the absence of ODSO; and
the conditions and time of heating are approximately equivalent to those that are effective to produce faujasite zeolite in the absence of ODSO.
3 . The method of claim 1 , wherein faujasite zeolite is recovered and is characterized by a zeolite yield, and wherein the zeolite yield is greater than a zeolite yield for a comparable faujasite zeolite formed from the baseline compositional ratio of components.
4 . The method as in claim 1 , wherein the faujasite zeolite is zeolite Y.
5 . The method as in claim 4 , wherein the effective amount of ODSO is less than the amount of ODSO that produces only amorphous alumina or silica-alumina.
6 . The method as in claim 4 , wherein the alkali metal source is sodium and the mass ratio of ODSO to sodium is in the range of about 0.1-2.5.
7 . The method as in claim 1 , wherein the faujasite zeolite is zeolite X.
8 . The method as in claim 1 , wherein the ODSO is derived from oxidation of disulfide oil compounds present in an effluent refinery hydrocarbon stream recovered following catalytic oxidation of mercaptans present in a mercaptan-containing hydrocarbon stream.
9 . The method as in claim 1 , wherein the ODSO compounds have 3 or more oxygen atoms and include one or more compounds selected from the group consisting of (R—SOO—SO—R′), (R—SOO—SOO—R′), (R—SO—SOO—OH), (R—SOO—SOO—OH), (R—SOO—SO—OH), (R′—SO—SO—OR), (R′—SOO—SO—OR), (R′—SO—SOO—OR) and (R′—SOO—SOO—OR), wherein R and R′ can be the same or different C1-C10 alkyl or C6-C10 aryl.
10 . The method as in claim 1 , wherein the ODSO compounds have 3 or more oxygen atoms and include two or more compounds selected from the group consisting of (R—SOO—SO—R′), (R—SOO—SOO—R′), (R—SO—SOO—OH), (R—SOO—SOO—OH), (R—SOO—SO—OH), (R′—SO—SO—OR), (R′—SOO—SO—OR), (R′—SO—SOO—OR) and (R′—SOO—SOO—OR), wherein R and R′ can be the same or different C1-C10 alkyl or C6-C10 aryl.
11 . The method as in claim 1 , wherein the ODSO compounds have 3 or more oxygen atoms and include one or more compounds selected from the group consisting of (R—SOO—SO—R′), (R—SOO—SOO—R′), (R—SO—SOO—OH), (R—SOO—SOO—OH), (R—SO—SO—OH), (R—SOO—SO—OH), wherein R and R′ can be the same or different C1-C10 alkyl or C6-C10 aryl.
12 . The method as in claim 1 , wherein the aluminum source comprises aluminates, alumina, other zeolites, aluminum colloids, boehmites, pseudo-boehmites, aluminum hydroxides, aluminum salts, aluminum alkoxides, aluminum wire or alumina gels.
13 . The method as in claim 1 , wherein the silica source comprises sodium silicate (water glass), rice husk, fumed silica, precipitated silica, colloidal silica, silica gels, zeolites, dealuminated zeolites, silicon hydroxides or silicon alkoxides.
14 . The method as in claim 1 , wherein crystallization occurs in the absence of a seed.
15 . The method as in claim 1 , wherein crystallization occurs in the presence of a seed and wherein the seed is selected from the group consisting of zeolite Y, zeolite X, USY zeolite, faujasite zeolite and small protozeolitic species (gels).
16 . The method as in claim 1 , wherein the pH of the intermediate suspension is in the range from about 9-14.
17 . The method as in claim 1 , wherein the homogeneous aqueous mixture is formed by:
providing the silica source; and
combining with the silica source the aluminum oxide source, the alkali metal source and the water-soluble ODSO;
wherein the water-soluble ODSO is added after the aluminum oxide source, the alkali metal source, or wherein the water-soluble ODSO is first combined with the aluminum oxide source and the alkali metal source, and then combined with the silica source; and
wherein an effective amount of water for the homogeneous aqueous mixture is provided by using utility water, a water-containing silica source, and/or by using an aqueous mixture of the aluminum oxide source and the alkali metal source.
18 . The method as in claim 1 , wherein the homogeneous aqueous mixture is formed by:
providing the aluminum oxide source and the alkali metal source as a first mixture; and
combining the first mixture with the silica source and the water-soluble ODSO;
wherein the water-soluble ODSO is added after the silica source; or wherein the water-soluble ODSO is first combined with the silica source, and then combined with the first mixture; and
wherein an effective amount of water for the homogeneous aqueous mixture is provided by using utility water, a water-containing silica source, and/or by using an aqueous mixture of the aluminum oxide source and the alkali metal source.
19 . The method as in claim 1 , wherein the homogeneous aqueous mixture is formed by:
combining the water-soluble ODSO with the silica source to form a first mixture; and
combining the first mixture with the aluminum oxide source and the alkali metal source;
wherein an effective amount of water for the homogeneous aqueous mixture is provided by using utility water, a water-containing silica source, and/or by using an aqueous mixture of the aluminum oxide source and the alkali metal source.
20 . The method as in claim 1 , wherein the homogeneous aqueous mixture is formed by:
combining the water-soluble ODSO with the aluminum oxide source and the alkali metal source to form a first mixture; and
combining the first mixture with the silica source;
wherein an effective amount of water for the homogeneous aqueous mixture is provided by using utility water, a water-containing silica source, and/or by using an aqueous mixture of the aluminum oxide source and the alkali metal source.