The invention relates to a process for preparation of methacrylic acid, comprising the steps: a) providing a feed composition comprising a main compound selected from isobutylene and tert-butyl alcohol and at least one co-compound selected from the group consisting of methanol, dimethyl ether and fo
The invention relates to a process for preparation of methacrylic acid, comprising the steps: a) providing a feed composition comprising a main compound selected from isobutylene and tert-butyl alcohol and at least one co-compound selected from the group consisting of methanol, dimethyl ether and formaldehyde; b) subjecting the feed composition provided in step a) with at least a first part of said at least one co-compound to a catalytic reaction zone and obtaining an oxidation phase comprising methyl methacrylate and methacrylic acid. The invention also relates a process for preparation of methyl methacrylate, further comprising the step of: c) esterification of at least a part of the oxidation phase obtained in step b), to an apparatus for preparation of methacrylic acid, to an apparatus for preparation of methyl methacrylate, to a process carried out in the apparatus, to methacrylic acid, to methyl methacrylate, to methacrylate esters, to a process for preparation of a polymer comprising at least one methacrylic acid, methyl methacrylate and/or methacrylate ester monomer unit, to a polymer comprising at least one methacrylic acid, methyl methacrylate and/or methacrylate ester monomer, to a process for preparation of a composition, to a composition, to chemical products, and to the use of at least one of methacrylic acid, methyl methacrylate, methacrylate ester, a polymer and/or a composition in chemical products.
대표청구항▼
1. A process comprising: at least partially oxidizing a feed composition comprising (i) a main compound which is at least isobutylene, and (ii) at least one co-compound selected from the group consisting of methanol, dimethyl ether, ethanol, methyl tert-butyl ether, ethyl tert-butyl ether and formal
1. A process comprising: at least partially oxidizing a feed composition comprising (i) a main compound which is at least isobutylene, and (ii) at least one co-compound selected from the group consisting of methanol, dimethyl ether, ethanol, methyl tert-butyl ether, ethyl tert-butyl ether and formaldehyde, in a catalytic reaction zone to obtain an oxidation phase comprising methacrylic acid as the main product, andoptionally, esterifying at least a part of the oxidation phase, whereinsaid process occurs at least partially in the gas phase,the feed composition is obtained by splitting of methyl tert-butyl ether or of ethyl tert-butyl ether,the oxidation takes place in at least two separate oxidation stages, which comprise a first oxidation to form methacrolein as the main product and a second oxidation to form methacrylic acid as the main product. 2. The process according to claim 1, further comprising: esterifying at least a part of said at least one co-compound. 3. The process according to claim 1, wherein the feed composition has a content of not less than 5 ppm of the at least one co-compound. 4. The process according to claim 1, wherein the feed composition comprises the at least one co-compound in a range from 0.0005 to 10 wt. % based on the total weight of main compound and co-compound in the feed composition. 5. The process according to claim 1, wherein the oxidation phase comprises at least 0.0005 wt. % methyl methacrylate, based on the hydrocarbons in the oxidation phase. 6. The process according to claim 2, wherein the at least one part of said at least one co-compound is at least 90 wt. % of the at least one co-compound. 7. The process according to claim 1, wherein said process is performed in an apparatus for production of methacrylic acid, said apparatus comprising: i) a supply for a feed composition comprising a main compound which is at least isobutylene, and at least one co-compound selected from the group consisting of methanol, dimethyl ether, ethanol, methyl tert-butyl ether, ethyl tert-butyl ether and formaldehyde; in fluid communication withii) a catalytic reaction zone for at least partial conversion of the feed composition into methacrylic acid as the main product; in fluid communication withiii) optionally, at least one first purification unit. 8. A process for preparation of a methacrylate ester with formula [CH2═C(CH3)C(═O)O]n—R, comprising: α1 preparing methacrylic acid according to the process of claim 1; andα3 reacting the methacrylic acid obtained in α1 with an alcohol of formula R(OH)m,wherein n and m represent an integer from 1 to 10, andR is at least one selected from the group consisting of a linear hydrocarbon, a branched hydrocarbon, a saturated hydrocarbon, an unsaturated hydrocarbon, an aliphatic hydrocarbon, an aromatic hydrocarbon, a ring hydrocarbon, a straight chain hydrocarbon, a linear heteroatom-comprising hydrocarbon, a branched heteroatom-comprising hydrocarbon, a saturated heteroatom-comprising hydrocarbon, an unsaturated heteroatom-comprising hydrocarbon, an aliphatic heteroatom-comprising hydrocarbon, an aromatic heteroatom-comprising hydrocarbon, a ring heteroatom-comprising hydrocarbon, and a straight chain heteroatom-comprising hydrocarbon. 9. A process for producing a polymer comprising at least one monomer unit selected from methacrylic acid, methyl methacrylate and a methacrylic ester with formula [CH2═C(CH3)C(═O)]n—R, wherein n represents an integer from 1 to 10, andR is at least one selected from the group consisting of a linear hydrocarbon, a branched hydrocarbon, a saturated hydrocarbon, an unsaturated hydrocarbon, an aliphatic hydrocarbon, an aromatic hydrocarbon, a ring hydrocarbon, a straight chain hydrocarbon, a linear heteroatom-comprising hydrocarbon, a branched heteroatom-comprising hydrocarbon, a saturated heteroatom-comprising hydrocarbon, an unsaturated heteroatom-comprising hydrocarbon, an aliphatic heteroatom-comprising hydrocarbon, an aromatic heteroatom-comprising hydrocarbon, a ring heteroatom-comprising hydrocarbon, and a straight chain heteroatom-comprising hydrocarbon,comprising:A1. preparing at least one of methacrylic acid according to a process of subjecting a feed composition comprising (i) a main compound which is at least isobutylene, and (ii) at least one co-compound selected from the group consisting of methanol, dimethyl ether, ethanol, methyl tert-butyl ether, ethyl tert-butyl ether and formaldehyde, in a catalytic reaction zone to obtain an oxidation phase comprising methacrylic acid as the main product, methyl methacrylate, and at least one methacrylate ester according to a process according to claim 8,A2a. polymerizing at least one of the methacrylic acid, the methyl methacrylate and the at least one methacrylate ester obtained in A1, andA2b. optionally polymerizing at least one co-monomer which is co-polymerisable with at least one of methacrylic acid, methyl methacrylate and methacrylate ester. 10. The process according to claim 9, wherein the at least one co-monomer is at least one co-monomer selected from the group consisting of: styrene, butadiene, acrylonitrile, butyl acrylate, vinyl acetate, and methyl acrylate. 11. A process for producing a composition comprising at least a first component selected from methacrylic acid, methyl methacrylate, at least one methacrylate ester, and a polymer comprising at least one monomer unit selected from methacrylic acid, methyl methacrylate and a methacrylate ester, comprising: B1. obtaining at least one first component selected from methacrylic acid, methyl methacrylate, a methacrylate ester and a polymer according to the process of claim 9;B2. optionally combining the at least one first component obtained in B1 with at least one further component. 12. The process according to claim 11, wherein the at least one further component is at least one component selected from a substituted polystyrene, an unsubstituted polystyrene, a poly-n-butyl acrylate, a polyacrylonitrile, a polysaccharide, a silica and a nanomaterial. 13. The process for preparation of a methacrylate ester according to claim 8, wherein said process for the preparation of methacrylic acid is performed in an apparatus for production of methacrylic acid, said apparatus comprising: i) a supply for a feed composition comprising a main compound which is at least isobutylene and at least one co-compound selected from the group consisting of methanol, dimethyl ether, ethanol, methyl tert-butyl ether, ethyl tert-butyl ether and formaldehyde; in fluid communication withii) a catalytic reaction zone for at least partial conversion of the feed composition into methacrylic acid as the main product; in fluid communication withiii) optionally, at least one first purification unit. 14. The process for preparation of a methacrylate ester according to claim 8, wherein said process for the preparation of methyl methacrylate is performed in an apparatus for production of methyl methacrylate, said apparatus comprising: i) a supply for a feed composition comprising a main compound which is at least isobutylene and at least one co-compound selected from the group consisting of methanol, dimethyl ether, ethanol, methyl tert-butyl ether, ethyl tert-butyl ether and formaldehyde; in fluid communication withii) a catalytic reaction zone for at least partial conversion of the feed composition into methacrylic acid as the main product; in fluid communication withiii) optionally, at least one first purification unit; in fluid communication withiv) an esterification unit;optionally, a conduit unit; in fluid communication with at least the supply and the esterification unit. 15. A process for producing a polymer according to claim 9, wherein said process for the preparation of methacrylic acid is performed in an apparatus for production of methacrylic acid, said apparatus comprising: i) a supply for a feed composition comprising a main compound which is at least isobutylene and at least one co-compound selected from the group consisting of methanol, dimethyl ether, ethanol, methyl tert-butyl ether, ethyl tert-butyl ether and formaldehyde; in fluid communication withii) a catalytic reaction zone for at least partial conversion of the feed composition into methacrylic acid as the main product; in fluid communication withiii) optionally, at least one first purification unit. 16. A process for producing a polymer according to claim 9, wherein said methyl methacrylate is obtained by the process of: a) subjecting a feed composition comprising a main compound which is at least isobutylene and at least one co-compound selected from the group consisting of methanol, dimethyl ether, ethanol, methyl tert-butyl ether, ethyl tert-butyl ether and formaldehyde, in the presence of a first part of said at least one co-compound to a catalytic reaction zone and obtaining an oxidation phase comprising methacrylic acid as the main product; andb) esterification of at least a part of the oxidation phase obtained a). 17. A process for producing a polymer according to claim 16, wherein said process for the preparation of methyl methacrylate is performed in an apparatus for production of methyl methacrylate, comprising: i) a supply for a feed composition comprising a main compound which is at least isobutylene and at least one co-compound selected from the group consisting of methanol, dimethyl ether, ethanol, methyl tert-butyl ether, ethyl tert-butyl ether and formaldehyde; in fluid communication withii) a catalytic reaction zone for at least partial conversion of the feed composition into methacrylic acid as the main product; in fluid communication withiii) optionally, at least one first purification unit; in fluid communication withiv) an esterification unit;optionally, a conduit unit; in fluid communication with at least the supply and the esterification unit. 18. A process for producing a composition according to claim 11, wherein the methacrylic acid is obtained by the following process: subjecting a feed composition comprising a main compound which is at least isobutylene, and at least one co-compound selected from the group consisting of methanol, dimethyl ether, ethanol, methyl tert-butyl ether, ethyl tert-butyl ether and formaldehyde, in the presence of a first part of said at least one co-compound to a catalytic reaction zone and obtaining an oxidation phase comprising methacrylic acid as the main product. 19. A process for producing a composition according to claim 11, wherein the methyl methacrylate is obtained by the following process: a) subjecting a feed composition comprising a main compound which is at least isobutylene and at least one co-compound selected from the group consisting of methanol, dimethyl ether, ethanol, methyl tert-butyl ether, ethyl tert-butyl ether and formaldehyde, in the presence of a first part of said at least one co-compound to a catalytic reaction zone and obtaining an oxidation phase comprising methacrylic acid as the main product; andb) esterification of at least a part of the oxidation phase obtained a). 20. A process for producing a composition according to claim 11, wherein the methacrylate ester has a formula [CH2═C(CH3)C(═O)]n—R, wherein n represents an integer from 1 to 10, andR is at least one selected from the group consisting of a linear hydrocarbon, a branched hydrocarbon, a saturated hydrocarbon, an unsaturated hydrocarbon, an aliphatic hydrocarbon, an aromatic hydrocarbon, a ring hydrocarbon, a straight chain hydrocarbon, a linear heteroatom-comprising hydrocarbon, a branched heteroatom-comprising hydrocarbon, a saturated heteroatom-comprising hydrocarbon, an unsaturated heteroatom-comprising hydrocarbon, an aliphatic heteroatom-comprising hydrocarbon, an aromatic heteroatom-comprising hydrocarbon, a ring heteroatom-comprising hydrocarbon, and a straight chain heteroatom-comprising hydrocarbon. 21. The process of claim 1, wherein the oxidizable compounds of the feed composition consist of the main compound and the co-compound.
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이 특허에 인용된 특허 (10)
Sheng Ming N. (Cherry Hill NJ) Kao Jar-Lin (Cherry Hill NJ), Liquid phase oxidation of unsaturated aldehydes to corresponding acids.
Chromecek Richard C. (Litchfield CT) Sojka Milan F. (Walden NY) Klein William L. (Belleville NJ) Carmody Walter J. (Port Jervis NY), Method of making highly adsorptive copolymers.
Miller Arthur F. (Lyndhurst OH) Zagata Robert J. (Seven Hills OH) Grasselli Robert K. (Chagrin Falls OH), Preparation of unsaturated carboxylic esters from propylene or isobutylene.
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