Catalysts for producing acrylic acids and acrylates
AssigneeCelanese International Corporation
InventorsHeiko Weiner, Josefina T. Chapman, Alexandra S. Locke, Craig T. Peterson, Mark O. Scates, Dick Nagaki
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Abstract
In one embodiment, the invention is to a catalyst composition comprising vanadium and titanium. The catalyst composition has a surface area of at least 22.6 m2/g and a plurality of pores, and the plurality of pores have a pore diameter of less than 11.9 nm.
Claims39
A catalyst composition, comprising:
- vanadium;
- titanium;
- and
- the catalyst composition having a surface area of at least 22.6 m2/g and a plurality of pores, the plurality of pores having an average pore diameter less than 11.9 nm.
A catalyst composition, comprising:
- vanadium;
- titanium;
- and
- a dispersing agent selected from the group consisting of an organic polymer, an ionic surfactant, a polysiloxane and a clay.
A process for producing a catalyst composition, comprising:
- (a) contacting a titanium precursor, a vanadium precursor, phosphoric acid, a reducing agent, and a dispersing agent selected from the group consisting of an organic polymer, a polysiloxane, an ionic surfactant and a clay, to form a catalyst precursor mixture;
- and
- (b) drying and calcining the catalyst precursor mixture to form the catalyst composition comprising titanium and vanadium and having a surface area of at least 22.6 m2/g and a plurality of pores, wherein the plurality of pores having an average pore diameter less than 11.9 nm.
A process for producing a catalyst composition, comprising:
- (a) contacting a titanium precursor, phosphoric acid, and a dispersing agent selected from a group consisting of an organic polymer, a polysiloxane, an ionic surfactant and a clay;
- (b) contacting a vanadium precursor with a mixture of a reducing agent and the dispersing agent, to form a vanadium mixture;
- (c) contacting the titanium pyrophosphate mixture with the vanadium mixture to form the catalyst composition having a surface area of at least 22.6 m2/g and a plurality of pores, wherein the plurality of pores having an average pore diameter less than 11.9 nm;
- and
- (d) removing at least a portion of the dispersing agent by calcining the catalyst composition.
A process for producing acrylic acid comprising the steps of:
- contacting acetic acid and an alkylenating agent over a catalyst composition to produce acrylic acid and/or acrylate,
- wherein the catalyst composition comprises vanadium and titanium,
- wherein the catalyst composition has a surface area of at least 22.6 m2/g, and
- wherein the catalyst composition comprises a plurality of pores, the plurality of pores having an average pore diameter less than 11.9 nm.
A process for producing acrylic acid comprising the steps of:
- contacting acetic acid and an alkylenating agent over a catalyst composition to produce acrylic acid and/or acrylate,
- wherein the catalyst composition comprises vanadium, titanium, and a dispersing agent selected from the group consisting of an organic polymer, an ionic surfactant, a polysiloxane and a clay.
Dependencies are inferred from the claim text.