Catalysis with titanium oxides
First Claim
1. A process comprising contacting, in the presence of a catalyst, a carbonyl compound and an alcohol wherein said catalyst comprises a titanium-containing compound having the formula of Mx Ti.sup.(III) Ti.sup.(IV)y O.sub.(x+3+4y)/2 wherein M is an alkali metal, Ti.sup.(III) is titanium in the +3 oxidation state, Ti.sup.(IV) is titanium in the +4 oxidation state, x and y are each a number greater than or equal to zero, and if x equals to zero, y is a number less than 1/2.
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Abstract
A process which can be used in oligomerization, polymerization, or depolymerization such as, for example, the production of a polyester is provided. The process comprises contacting a carbonyl compound, in the presence of a composition, with an alcohol. The catalyst comprises a catalyst having the formula of Mx Ti.sup.(III) Ti.sup.(IV)y O.sub.(x+3+4y)/2 wherein M is an alkali metal, Ti.sup.(III) is titanium in the +3 oxidation state, Ti.sup.(IV) is titanium in the +4 oxidation state, x and y are numbers greater than or equal to zero wherein if x equals zero, y is a number less than 1/2.
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Citations
19 Claims
- 1. A process comprising contacting, in the presence of a catalyst, a carbonyl compound and an alcohol wherein said catalyst comprises a titanium-containing compound having the formula of Mx Ti.sup.(III) Ti.sup.(IV)y O.sub.(x+3+4y)/2 wherein M is an alkali metal, Ti.sup.(III) is titanium in the +3 oxidation state, Ti.sup.(IV) is titanium in the +4 oxidation state, x and y are each a number greater than or equal to zero, and if x equals to zero, y is a number less than 1/2.
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16. A process comprising contacting, in the presence of a catalyst, an alcohol with a carbonyl compound under a condition sufficient to produce a polymer comprising repeat units derived from said alcohol and said carbonyl compound wherein
said catalyst comprises a titanium-containing compound having the formula of Mx Ti.sup.(III) Ti.sup.(IV)y O.sub.(x+3+4y)/2 wherein M is an alkali metal, Ti.sup.(III) is titanium in the +3 oxidation state, Ti.sup.(IV) is titanium in the +4 oxidation state, x and y are numbers greater than or equal to zero, and if x equals to zero, y is a number less than 1/2; -
said alcohol is selected from the group consisting of ethylene glycol, propylene glycol, isopropylene glycol, butylene glycol, 1-methyl propylene glycol, pentylene glycol, and combinations of two or more thereof; and said carbonyl compound is selected from the group consisting of terephthalic acid, dimethyl terephthalate, isophthalic acid, napthalic acid, succinic acid, adipic acid, phthalic acid, glutaric acid, acrylic acid, oxalic acid, benzoic acid, maleic acid, propenoic acid, and combination of two or more thereof. - View Dependent Claims (17, 18)
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19. A process comprising contacting, in the presence of a catalyst which comprises Ti2 O3 or TiO1.5, terephthalic acid with ethylene glycol.
Specification