Methods of producing organosilica materials and uses thereof
AssigneeExxonMobil Research and Engineering Company
InventorsHuaxing Zhou, Quanchang Li, David C. Calabro
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Abstract
Methods of preparing organosilica materials using a starting material mixture comprising at least one compound of Formula [(RO)2SiCH2]3 (Ia) and at least one compound of Formula [R′ROSiCH2]3 (Ib), wherein each R′ independently represents an RO—, an R group, or an (RO)3Si—CH2— group, at least one R′ being (RO)3Si—CH2—; and R represents a C1-C4 alkyl group, in the absence of a structure directing agent and/or porogen are provided herein. Processes of using the organosilica materials, e.g., for gas separation, etc., are also provided herein.
Claims14
A method for preparing an organosilica material, the method comprising:
- (a) providing a starting material mixture comprising at least one compound of Formula [(RO)2SiCH2]3 (Ia) and at least one compound of Formula [R′ROSi CH2]3 (Ib), wherein each R′ independently represents an RO— group, an R group, or an (RO)3Si—CH2— group, at least one R′ being (RO)3Si—CH2—;
- and R represents a C1-C4 alkyl group;
- (b) adding the starting material mixture into an acidic or basic aqueous mixture wherein the weight ratio between Formula (Ia) and Formula (Ib) is about 1:1 to about 5:1 such that the resulting solution contains essentially no structure directing agent;
- (c) curing the solution to produce a pre-product;
- and
- (d) drying the pre-product to obtain the organosilica material which is a polymer comprising:
- independent siloxane units of Formula [R1R2SiCH2]3 (I), wherein each R1 represents a hydroxyl group, a C1-C4 alkoxy group, or an oxygen atom bonded to a silicon atom of another siloxane unit and each R2 represents a hydroxyl group, a C1-C4 alkoxy group, a C1-C4 alkyl group, or an oxygen atom bonded to a silicon atom of another siloxane, wherein the organosilica material having a total surface area of about 50 m2/g to about 2500 m2/g and an average pore diameter greater than about 1.0 nm.
An organosilica material prepared according to providing a starting material mixture comprising at least one compound of Formula [(RO)2SiCH2]3 (Ia) and at least one compound of Formula [R′ROSi CH2]3 (Ib), wherein each R′ independently represents an RO— group, an R group, or an (RO)3Si—CH2— group, at least one R′ being (RO)3Si—CH2—;
- and R represents a C1-C4 alkyl group;
- adding the starting material mixture into an acidic or basic aqueous mixture wherein the weight ratio between Formula (Ia) and Formula (Ib) is about 1:1 to about 5:1 such that the resulting solution contains essentially no structure directing agent;
- curing the solution to produce a pre-product;
- and drying the pre-product to obtain the organosilica material which is a polymer comprising independent siloxane units of Formula [R1R2SiCH2]3 (I), wherein each R1 represents a hydroxyl group, a C1-C4 alkoxy group, or an oxygen atom bonded to a silicon atom of another siloxane unit and each R2 represents a hydroxyl group, a C1-C4 alkoxy group, a C1-C4 alkyl group, or an oxygen atom bonded to a silicon atom of another siloxane, wherein the organosilica material having a total surface area of about 50 m2/g to about 2500 m2/g and an average pore diameter greater than about 1.0 nm.
Dependencies are inferred from the claim text.