摘要:
Disclosed is a process for producing .alpha.-hydroxy-carboxylic acid amide represented by the formula (I): ##STR1## wherein R.sup.1 and R.sup.2 are as defined in the specification, by a catalytic hydration reaction of cyanohydrin represented by the formula (II): ##STR2## which comprises using a modified manganese dioxide containing one or more of an alkali metal element and an alkaline earth element in an amount of 0.05 to 0.5 based on the manganese element in terms of atomic ratio.
摘要:
A process for preparing an amide by hydrating a cyanohydrin with a denatured manganese dioxide catalyst. The catalyst is prepared by reacting an aqueous permanganate solution and an aqueous manganese (II) compound solution in an acidic aqueous solution at a temperature of 70.degree. C. to 150.degree. C.
摘要:
A process for producing a denatured manganese dioxide for the hydration reaction of cyanohydrins comprising reacting an aqueous permanganate salt solution and an aqueous manganese (II) compound in an acidic aqueous solution at a temperature of 70.degree. C. to 130.degree. C. is disclosed. The manganese dioxide catalyst obtained by the process exhibits a high activity over a long period in the preparation of an amide by the hydration of the corresponding cyanohydrin.
摘要:
Process for production of .alpha.-hydroxycarboxylic acid amide of the general formula (A), comprising hydrating cyanhydrin of the general formula (B) by the use of a modified manganese dioxide catalyst containing one or more of zirconium, vanadium, and tin, and an alkali metal element. ##STR1## wherein all the symbols are as defined in the appended claims.
摘要:
An engagement structure includes a garnish main body, a garnish lid, an engagement stop, and an engaged part. The engagement stop has an engagement protrusion and is disposed on one of the garnish main body and the garnish lid. The engagement protrusion protrudes in a direction opposite to an airbag accommodated between the pillar and the garnish main body. The engaged part is engaged to the engagement protrusion and is disposed on another of the garnish main body and the garnish lid. The engaged part has a guiding surface configured to guide the airbag during inflation.
摘要:
A vehicle occupant protection apparatus for use in a vehicle includes an occupant-protecting expansion part caused to expand in the form of a curtain in the vehicle cabin along windows. The expansion part is attached to the vehicle body at two attachment points positioned forward and rearward of the windows. A tension line that joins the two attachment points is in a position where the expansion part is extended between the two points, and is positioned below the lower edges of the windows.
摘要:
An engagement structure includes a garnish main body, a garnish lid, an engagement stop, and an engaged part. The engagement stop has an engagement protrusion and is disposed on one of the garnish main body and the garnish lid. The engagement protrusion protrudes in a direction opposite to an airbag accommodated between the pillar and the garnish main body. The engaged part is engaged to the engagement protrusion and is disposed on another of the garnish main body and the garnish lid. The engaged part has a guiding surface configured to guide the airbag during inflation.
摘要:
A sun visor for a vehicle includes a shaft 10 angularly movably mounted on a roof surface within a passenger compartment of the vehicle, and a shielding plate angularly movably mounted on the shaft 10. A holder 30 and a stabilizer 70, in which the shaft 10 is angularly movably inserted, are provided at an end portion of the shielding plate, and a first projection 20A and a second projection 20B are formed on the shaft 10, and are spaced from each other in a direction of an axis of the shaft. The distance between the second projection 20B and the tubular portion 71 is larger than the distance between the first projection 20A and the bearing portion 33.
摘要:
Carboxylic acid esters, industrially important compounds, are obtained by reacting carboxylic acid amides and formic acid esters, or carboxylic acid amides, alcohols and carbon monoxide in the presence of metal alcoholate.
摘要:
A vehicle occupant protection apparatus for use in a vehicle includes an occupant-protecting expansion part caused to expand in the form of a curtain in the vehicle cabin along windows. The expansion part is attached to the vehicle body at two attachment points positioned forward and rearward of the windows. A tension line that joins the two attachment points is in a position where the expansion part is extended between the two points, and is positioned below the lower edges of the windows.