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US 11,000,834 B2Granted
Catalysts for the dehydration of hydroxypropionic acid and its derivatives
AssigneeThe Procter & Gamble Company
InventorsJuan Esteban Velasquez, Dimitris Ioannis Collias, Jane Ellen Godlewski, Fred Christian Wireko
Life of this patent
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Abstract
Hydroxypropionic acid, hydroxypropionic acid derivatives, or mixtures thereof are dehydrated using a catalyst and a method to produce bio-acrylic acid, acrylic acid derivatives, or mixtures thereof. A method to produce the dehydration catalyst is also provided.
Claims18
A method of preparing a dehydration catalyst, comprising:
- mixing two or more different phosphate precursor compounds selected from the group comprising:
- MjI(H(2+i−j)PiO(3i+1)) (VIa)
- (NH4)l(H(2+k−l)PkO(3k+1)) (VIb)
- MpI(H(m−p)(PO3)m) (VIc)
- (NH4)r(H(q−r)(PO3)q) (VId)
- MuI(H(t−u)P(2s+t)O(5s+3t)) (VIe)
- (NH4)α(H(w−α)P(2v+w)O(5v+3w)) (VIf)
- M2IO (VIg)
- MIOH (VIh)
- MINO3 (VIi)
- M2ICO3 (VIj)
- (H(CH2)βCOO)MI (VIk);
- wherein MI is a monovalent cation;
- wherein said monovalent cation is selected from the group consisting of Li+, Na+, K+, Rb+, Cs+, Ag+, Tl+, and mixtures thereof;
- wherein i, k, m, q, s, and v are integers greater than zero;
- wherein j, l, p, r, u, and α are real numbers equal to or greater than zero;
- wherein t, w, and β are integers equal to or greater than zero;
- wherein (2+i−j), (2+k−l), (m−p), (q−r), (t−u), and (w−α) are equal to or greater than zero;
- to produce a dehydration catalyst precursor mixture;
- wherein the molar ratio between the total amount of P and the total amount of MI in said dehydration catalyst precursor mixture is about 1;
- and
- contacting said dehydration catalyst precursor mixture with a gas mixture comprising water vapor to produce one or more amorphous phosphate salts;
- wherein the water partial pressure in said gas mixture is equal to or greater than the water partial pressure at the triple point of at least one of said one or more amorphous phosphate salts;
- and wherein said contacting step between said dehydration catalyst precursor mixture and said gas mixture is performed at a temperature equal to or greater than the temperature at the triple point of at least one of said one or more amorphous phosphate salts.
21 more elements
A method of preparing a dehydration catalyst, comprising:
- mixing two or more different phosphate precursor compounds selected from the group comprising:
- MjI(H(2+i−j)PiO(3i+1)) (VIa)
- (NH4)l(H(2+k−l)PkO(3k+1)) (VIb)
- MpI(H(m−p)(PO3)m) (VIc)
- (NH4)r(H(q−r)(PO3)q) (VId)
- MuI(H(t−u)P(2s+t)O(5s+3t)) (VIe)
- (NH4)α(H(w−α)P(2v+w)O(5v+3w)) (VIf)
- M2IO (VIg)
- MIOH (VIh)
- MINO3 (VIi)
- M2ICO3 (VIj)
- (H(CH2)βCOO)MI (VIk);
- wherein MI is a monovalent cation;
- wherein said monovalent cation is selected from the group consisting of Li+, Na+, K+, Rb+, Cs+, Ag+, Tl+, and mixtures thereof;
- wherein i, k, m, q, s, and v are integers greater than zero;
- wherein j, l, p, r, u, and α are real numbers equal to or greater than zero;
- wherein t, w, and β are integers equal to or greater than zero;
- wherein (2+i−j), (2+k−l), (m−p), (q−r), (t−u), and (w−α) are equal to or greater than zero;
- to produce a dehydration catalyst precursor mixture;
- wherein the molar ratio between the total amount of P and the total amount of MI in said dehydration catalyst precursor mixture is about 1;
- and
- contacting said dehydration catalyst precursor mixture with a gas mixture comprising water vapor at a partial pressure equal to or greater than about 4 bar;
- wherein said contacting step between said dehydration catalyst precursor mixture and said gas mixture is performed at a temperature equal to or greater than about 250° C.;
- wherein one or more amorphous phosphate salts are produced as a result of said dehydration catalyst precursor mixture being contacted with said water vapor.
21 more elements
A method of preparing a dehydration catalyst, comprising:
- mixing two or more different phosphate precursor compounds selected from the group comprising:
- MjI(H(2+i−j)PiO(3i+1)) (VIa)
- (NH4)l(H(2+k−l)PkO(3k+1)) (VIb)
- MpI(H(m−p)(PO3)m) (VIc)
- (NH4)r(H(q−r)(PO3)q) (VId)
- MuI(H(t−u)P(2s+t)O(5s+3t)) (VIe)
- (NH4)α(H(w−α)P(2v+w)O(5v+3w)) (VIf)
- M2IO (VIg)
- MIOH (VIh)
- MINO3 (VIi)
- M2ICO3 (VIj)
- (H(CH2)βCOO)MI (VIk);
- wherein MI is a monovalent cation;
- wherein said monovalent cation is selected from the group consisting of K+, Rb+, Cs+, and mixtures thereof;
- wherein i, k, m, q, s, and v are integers greater than zero;
- wherein j, l, p, r, u, and α are real numbers equal to or greater than zero;
- wherein t, w, and β are integers equal to or greater than zero;
- wherein (2+i−j), (2+k−l), (m−p), (q−r), (t−u), and (w−α) are equal to or greater than zero;
- to produce a dehydration catalyst precursor mixture;
- wherein the molar ratio between the total amount of P and the total amount of MI in said dehydration catalyst precursor mixture is about 1;
- and
- contacting said dehydration catalyst precursor mixture with a gas mixture comprising water vapor at a partial pressure equal to or greater than about 0.8 bar;
- wherein said contacting step between said dehydration catalyst precursor mixture and said gas mixture is performed at a temperature equal to or greater than about 250° C.;
- wherein one or more amorphous phosphate salts are produced as a result of said dehydration catalyst precursor mixture being contacted with said water vapor.
21 more elements
Dependencies are inferred from the claim text.