Catalytic process for preparing an α,β-ethylenically unsaturated carboxylic acid salt, comprising reacting an alkene and carbon dioxide in the presence of a carboxylation catalyst and releasing the α,β-ethylenically unsaturated carboxylic acid salt with a base, the carboxylation catalyst being a transition metal complex, which comprises a structurally constrained bidentate P,X ligand, wherein X is selected from the group consisting of P, N, O, and carbene, the P and X atom are separated by 2 to 4 bridging atoms, and wherein the bridging atoms are part of at least one 5- to 7-membered cyclic substructure. A further catalytic processes for preparing α-βethylenically unsaturated carboxylic acid derivatives from CO.sub.2 and an alkene is provided.

Catalytic process for preparing an α,β-ethylenically unsaturated carboxylic acid salt, comprising reacting an alkene and carbon dioxide in the presence of a carboxylation catalyst and releasing the α,β-ethylenically unsaturated carboxylic acid salt with a base, the carboxylation catalyst being a transition metal complex, which comprises a structurally constrained bidentate P,X ligand, wherein X is selected from the group consisting of P, N, O, and carbene, the P and X atom are separated by 2 to 4 bridging atoms, and wherein the bridging atoms are part of at least one 5- to 7-membered cyclic substructure. A further catalytic processes for preparing α-βethylenically unsaturated carboxylic acid derivatives from CO.sub.2 and an alkene is provided.

A process method for producing a pesticide by using carbon dioxide includes: weighing a 1,3-cyclohexanedione substrate 1(a-e), a catalyst and Cs.sub.2CO.sub.3 in a Schlenk bottle, degassing, and continuously introducing 1 atm of carbon dioxide; adding a solvent and reacting for 48 h in an oil bath at 50° C. After the reaction was completed, post-treatment was carried out to obtain a 2-carboxyl-1,3-cyclohexanedione compound 2(a-e). The obtained acid is acylated and then added dropwise to a dichloromethane solution containing aniline to react for 2 h at room temperature. After the reaction, column chromatography was performed to obtain a pesticide compound 3(a-e). Adding the pesticide compound 3(a-e) into 50% concentrated sulfuric acid and refluxing at 80° C. for 8 hours. Through separation, a pesticide product compound 4(a-e) was obtained. The process method is simple, with low requirements on equipment, wide sources of raw materials, low cost, low toxicity and easy industrial scale-up production.

A process method for producing a pesticide by using carbon dioxide includes: weighing a 1,3-cyclohexanedione substrate 1(a-e), a catalyst and Cs.sub.2CO.sub.3 in a Schlenk bottle, degassing, and continuously introducing 1 atm of carbon dioxide; adding a solvent and reacting for 48 h in an oil bath at 50° C. After the reaction was completed, post-treatment was carried out to obtain a 2-carboxyl-1,3-cyclohexanedione compound 2(a-e). The obtained acid is acylated and then added dropwise to a dichloromethane solution containing aniline to react for 2 h at room temperature. After the reaction, column chromatography was performed to obtain a pesticide compound 3(a-e). Adding the pesticide compound 3(a-e) into 50% concentrated sulfuric acid and refluxing at 80° C. for 8 hours. Through separation, a pesticide product compound 4(a-e) was obtained. The process method is simple, with low requirements on equipment, wide sources of raw materials, low cost, low toxicity and easy industrial scale-up production.

A process method for producing a pesticide by using carbon dioxide includes: weighing a 1,3-cyclohexanedione substrate 1(a-e), a catalyst and Cs.sub.2CO.sub.3 in a Schlenk bottle, degassing, and continuously introducing 1 atm of carbon dioxide; adding a solvent and reacting for 48 h in an oil bath at 50° C. After the reaction was completed, post-treatment was carried out to obtain a 2-carboxyl-1,3-cyclohexanedione compound 2(a-e). The obtained acid is acylated and then added dropwise to a dichloromethane solution containing aniline to react for 2 h at room temperature. After the reaction, column chromatography was performed to obtain a pesticide compound 3(a-e). Adding the pesticide compound 3(a-e) into 50% concentrated sulfuric acid and refluxing at 80° C. for 8 hours. Through separation, a pesticide product compound 4(a-e) was obtained. The process method is simple, with low requirements on equipment, wide sources of raw materials, low cost, low toxicity and easy industrial scale-up production.

A system and method with a solid oxide electrolysis cell (SOEC), including feeding carbon dioxide and an olefin to the SOEC and discharging carbon monoxide and an olefin oxide from the SOEC, wherein the olefin oxide corresponds to the olefin.

A system and method with a solid oxide electrolysis cell (SOEC), including feeding carbon dioxide and an olefin to the SOEC and discharging carbon monoxide and an olefin oxide from the SOEC, wherein the olefin oxide corresponds to the olefin.

An object is to provide a novel production method for 4-hydroxy-2-methylbenzoic acid that is suitable for industrial use. As a solution, a production method for 4-hydroxy-2-methylbenzoic acid that includes performing a step (I) of reacting a compound represented by general formula (1) with carbon dioxide to obtain a compound represented by general formula (2), and then a step (II) of dealkylating the compound represented by general formula (2), is provided.

An object is to provide a novel production method for 4-hydroxy-2-methylbenzoic acid that is suitable for industrial use. As a solution, a production method for 4-hydroxy-2-methylbenzoic acid that includes performing a step (I) of reacting a compound represented by general formula (1) with carbon dioxide to obtain a compound represented by general formula (2), and then a step (II) of dealkylating the compound represented by general formula (2), is provided.

An object is to provide a novel production method for 4-hydroxy-2-methylbenzoic acid that is suitable for industrial use. As a solution, a production method for 4-hydroxy-2-methylbenzoic acid that includes performing a step (I) of reacting a compound represented by general formula (1) with carbon dioxide to obtain a compound represented by general formula (2), and then a step (II) of dealkylating the compound represented by general formula (2), is provided.