Abstract:
PROBLEM TO BE SOLVED: To simplify reattachment of an existing partition wall column and assembly of a new partition wall column by detachably fitting a partition wall to the inside of the partition wall column. SOLUTION: Partition walls 3 are detachably fitted to the inside of a partition wall column. In other words, the partition walls 3 are fitted on one side of the respective packed beds 4 as a sheet of 0.1-3mm desirably about 1-2mm thickness and formed into a structural member integrated with the packed beds 4. In this case, the integrated partition wall 3 is formed longer than the packed bed 4 combined therewith in the edges of the head and the bottom by about 1-10mm and has an additional sheet strips 5 in the edge of the bottom. The sheet strip 5 has about 10-20mm width and about 0.1-2mm thickness. In the case of combining an individual packed bed 4, a roof type overlapped part is formed and thereby liquid is inhibited from infiltrating. The overlapped part is sealed sufficiently and strongly for infiltration of vapor.
Abstract:
PROBLEM TO BE SOLVED: To enable catalytic suspension reaction having high blank yield by supplying a liquid phase containing suspension of at least one kind of catalyst and, if necessary, a gas phase through a device in a reaction chamber having orifices or channels having a specified hydraulic diameter when the catalytic reaction is performed. SOLUTION: A bubble tower reaction chamber 1 equipped with orifices and channels having 0.5 to 20mm hydraulic diameter, advantageously 1 to 10mm, and more preferably 1 to 3mm is used. In this chamber, a liquid reaction component containing a suspended catalyst is introduced through a filling tube 3, while a gas reaction component is supplied through a connecting tube 4 to a mixing nozzle 5 to mix the circulated suspension liquid and then supplied to the bottom of the reaction chamber 1. After the suspension liquid with the gas is supplied through a tube 6 to a separator 7, the gas is sent to a ventilation tube 10 through a cooler 8 for the discharged gas and a pressure holding device 9. The suspension liquid is introduced from the separator 7 through a tube 11 to a pump 12, heat exchanger 13, mixing nozzle 5, and reaction chamber 1. After the reaction is completed, the liquid is discharged through a discharging tube 14.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing an alkene by partially hydrogenating a 10-30C alkyne. SOLUTION: A palladium compound or, if needed, other metal ion is applied to a heat treated and cooled support material by impregnating a solution containing a palladium salt or, if needed, other metal ion and subsequent drying and 10-2,000 ppm of carbon monoxide (CO) is added or a corresponding amount of CO is generated by a slight decomposition of a compound capable of releasing CO under the reaction condition and added to the reaction mixture.
Abstract:
PROBLEM TO BE SOLVED: To provide a packing structure capable of increasing the capacity and economical effect of the heat exchange and mass transfer. SOLUTION: At least one packing layer 1 having a first lower end 2 and a second upper end 3 is provided, and the packing layer has an internal geometrical pattern with the height between the lower and upper ends varied. Accordingly, a bubble layer having a gas phase with the dispersed state preferential is formed as desired by appropriately setting the flow velocity of the liquid and gas in the first, especially the lower, zone 6 of the layer 1, and a thin liquid laminar flow having a gas phase with the continuous state preferential is formed as required in the second, especially the upper, zone 7 of the layer 1 at the same time. A packing structure for the heat exchange and mass transfer between liquid and gas in a column provided with at least the one packing layer 1 is obtained in this way.
Abstract:
PROBLEM TO BE SOLVED: To carry out the hydrogenation of especially citral to citronellal at a low cost by an economical process having improved space-time yield and reduced investment cost by hydrogenating an α,β-unsaturated carbonyl compound in liquid phase under specific condition. SOLUTION: A compound of formula II is produced by the hydrogenation of an α,β-unsaturated carbonyl compound of formula I (R1 is H or an organic group; R2 to R4 are each H or a 1-4C alkyl) with hydrogen in the presence of powdery palladium and/or rhodium and an organic group while performing the regeneration of the product and the circulation of hydrogen gas in a bubble packed column reactor. The packing material in the bubble column reactor preferably has a hydraulic diameter of 0.5-20 mm and a surface roughness of 0.1 to 10 times the average particle diameter of the powdery catalyst particles at the opening or the channel wall part of the packing material and is made of a metallic material, a plastic material, etc.
Abstract:
PROBLEM TO BE SOLVED: To easily obtain the subject compound useful as a precursor of vitamin E or the like with almost no production of byproducts by reacting a specific allyl alcohol with a specific diketene or the like in the presence of a specific aluminum catalyst by Carroll reaction. SOLUTION: This compound of formula III is obtained by reacting (A) an allyl alcohol of formula I (R is H or the like) with (B) a diketene or an acetoacetic acid alkyl ester of formula II (R is a 1-5C alkyl) by using (C) an aluminum compound which has one or more groups of acetoacetic acid alkyl ester and one or two of alkoxyl groups, or an acetoacetic acid alkyl ester group esterified with specifically secondary butanol or isobutanol or esterified with two or more different alkanols and is a stable liquid at ambient temperature, or a mixture of such aluminum compounds as a catalyst by a modified or unmodified Carroll reaction.
Abstract:
The invention relates to a device for carrying out, in a substantially isothermal manner, a heterogeneously catalysed reaction in a gas phase with high heat tonality. The inventive device comprises at least one reactor chamber (101) with an inlet (131, 141) and an outlet (143). The reactor chamber is defined by heat dissipating walls, lying at a substantially constant distance of /m and good thermal conductibility; the reaction gas in the reactor chamber flows at a rate of >/= 200 m per m surface area per hour; and a heat exchange medium flows on the side of the reactor wall opposite the reactor chamber.
Abstract:
The invention relates to a device for carrying out, in a substantially isothermal manner, a heterogeneously catalysed reaction in a gas phase with high heat tonality. The inventive device comprises at least one reactor chamber (101) with an inlet (131, 141) and an outlet (143). The reactor chamber is defined by heat dissipating walls, lying at a substantially constant distance of /m and good thermal conductibility; the reaction gas in the reactor chamber flows at a rate of >/= 200 m per m surface area per hour; and a heat exchange medium flows on the side of the reactor wall opposite the reactor chamber.
Abstract:
The invention relates to a method for cleaning crude terephthalic acid by means of catalytic, hydrogenating aftertreatment using a catalyst material containing at least one hydrogenation metal applied to a carbon carrier consisting of carbon fibres. The invention also relates to a catalyst consisting of the at least one catalyst material containing the at least one hydrogenation metal applied to the carbon fibres, the BET surface of the carbon carrier being