摘要:
Salicylaldehydes useful for perfumes, agricultural chemicals, chelating agents and the like are produced in high yield with high selectivity by reacting formaldehyde or its derivative with a corresponding phenol in a solvent using as a catalyst chromium or iron compounds.
摘要:
Disclosed in a method for producing a mixture containing cycloalkanone and/or cycloalkanol which comprises oxidizing a cycloalkane with molecular oxygen to a cycloalkyl hydroperoxide represented by the formula (1): ##STR1## (wherein m represents an integer of 4.ltoreq.m.ltoreq.11) and decomposing the cycloalkyl hydroperoxide to obtain a mixture containing cycloalkanone and/or cycloalkanol, wherein the oxidation of the cycloalkane with molecular oxygen and/or the decomposition of the cycloalkyl hydroperoxide are carried out in the presence of a catalyst composition comprising at least one metallic salt represented by the formula (2):MX.sub.n (2)(wherein M represent Co, Mn, Cr or Fe, X represents an anionic ligand and n represents 2 or 3) and at least one compound represented by the formula (3): ##STR2## (wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represent hydrogen or a lower alkyl group) and/or a catalyst composition comprising at least one metal complex represented by the formula (4): ##STR3## (wherein M represents Co, Mn, Cr or Fe, X represents an anionic ligand, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represent hydrogen or a lower alkyl group, p is 1 or 2 and q is 0, 1 or 2).Advantages of the method are higher conversion of cycloalkyl hydroperoxide, higher yields of cycloalkanone and cycloalkanol and higher production ratio of cycloalkanone.
摘要翻译:本发明涉及制备含有环烷酮和/或环烷醇的混合物的方法,该方法包括用分子氧将环烷烃氧化为由式(1)表示的环烷基氢过氧化物:其中m表示4的整数, = m 11)并分解环烷基氢过氧化物以获得含有环烷酮和/或环烷醇的混合物,其中环烷烃与分子氧的氧化和/或环烷基氢过氧化物的分解在催化剂存在下进行 包含至少一种由式(2)表示的金属盐的组合物:MXn(2)(其中M表示Co,Mn,Cr或Fe,X表示阴离子配体,n表示2或3)和至少一种由 式(3):其中R1,R2,R3和R4独立地表示氢或低级烷基)和/或包含至少一种由式(4)表示的金属络合物的催化剂组合物: (图) 4)(其中M表示Co,Mn,Cr或Fe,X表示阴离子配体,R1,R2,R3和R4独立地表示氢或低级烷基,p为1或2,q为0,1或2) 。 该方法的优点是环烷基氢过氧化物的转化率较高,环烷酮和环烷醇的产率较高,环烷酮的生产率较高。
摘要:
Diacetoxybutene is prepared in a high yield with a high selectivity from butadiene, acetic acid and oxygen in the presence of a solid catalyst comprising sulfur, at least one noble metal selected from palladium, platinum and rhodium, and a carrier.
摘要:
A method for descaling the inside of a jacket of a glass-lined instrument by using a cleaning solution containing a detergent and an inhibitor is disclosed, wherein the amount of hydrogen permeated through the matrix of the instrument to the lining glass side is estimated by measuring a rate of hydrogen permeation through the jacket material or a test piece fitted to the circulation line of the cleaning solution and inserting the measured value into a previously established relationship between thickness of a steel plate and a rate of hydrogen permeation, and the concentrations of the detegent and the inhibitor in the cleaning solution, the descaling temperature or the descaling time is controlled so that the rate of hydrogen permeation through the matrix may not exceed 30 ml per m.sup.2 of the matrix during the descaling. A relatively large amount of scales can be rapidly and easily removed without causing breaking of the lining glass due to hydrogen permeation while minimizing corrosion of the matrix.
摘要:
A honing stone exchanger for use with superfinishing machines wherein an annular workpiece is rotated on a main axis in a shoe centerless system by a drive unit, while a honing stone for superfinishing the outer peripheral surface of the annular workpiece is oscillated concentrically with the center of curvature of the outer peripheral surface by an oscillation unit, the honing stone exchanger being characterized in that it comprises a mechanism for stopping the oscillation shaft of the oscillation unit and positioning and fixing it at a predetermined position, a mechanism for moving a stone holder out of a processing position to a honing stone exchange position, and a mechanism for feeding a reserve honing stone to the stone holder moved to the honing stone exchange position.
摘要:
A novel method for producing tiglic aldehyde from ethylacrolein by isomerization in the presence of a hydrogenating catalyst is disclosed. According to the invention, tiglic aldehyde can be prepared in a good yield.
摘要:
A device for sealing a vessel, in particular a cartridge (7) or a test-tube for accommodating a freeze-dried pharmaceutical product (S), wherein the vessel (1) comprises at its opening end (3) an opening edge (4) and an adjoining longitudinal portion (5) with an evenly formed inner cross section, including a front plunger (2) to be positioned inside the vessel (1) at the longitudinal portion (5), is characterized in that the front plunger (2) is configured to be positioned in the vessel (1) in a sealing state, in which the front plunger (2) is fully inserted in the vessel (1), or in an exchange state, in which the front plunger (2) is inserted partly in the vessel (1) and partly protrudes over the opening edge (4) of the vessel (1), wherein the front plunger (2) comprises sealing means that are configured to seal the inside of the vessel (1) against the outside when the front plunger (2) is positioned in the sealing state, and one or more communicating grooves (2i) that are configured to place the inside and outside of the vessel (1) in communication with each other when the front plunger (2) is positioned in the exchange state. Furthermore, a method of manufacturing a sealed vessel (1) is disclosed.
摘要:
A device for sealing a vessel, in particular a cartridge (7) or a test-tube for accommodating a freeze-dried pharmaceutical product (S), wherein the vessel (1) comprises at its opening end (3) an opening edge (4) and an adjoining longitudinal portion (5) with an evenly formed inner cross section, including a front plunger (2) to be positioned inside the vessel (1) at the longitudinal portion (5), is characterized in that the front plunger (2) is configured to be positioned in the vessel (1) in a sealing state, in which the front plunger (2) is fully inserted in the vessel (1), or in an exchange state, in which the front plunger (2) is inserted partly in the vessel (1) and partly protrudes over the opening edge (4) of the vessel (1), wherein the front plunger (2) comprises sealing means that are configured to seal the inside of the vessel (1) against the outside when the front plunger (2) is positioned in the sealing state, and one or more communicating grooves (2i) that are configured to place the inside and outside of the vessel (1) in communication with each other when the front plunger (2) is positioned in the exchange state. Furthermore, a method of manufacturing a sealed vessel (1) is disclosed.
摘要:
An air and liquid-tight container is capable of storing different substances in different compartments sealingly separated by a front gasket having two separate parts that are independently slidable. A rear gasket is connectable to a push rod so as to function as a plunger, the front gasket being slidable in response to sliding of the rear gasket, thereby enabling the substance in the rear compartment to be introduced into the front compartment through a bypass. The front and rear gaskets are encased in the tubular body at a compressibility C (%) of 2% to 10%, with the product of the compressibility and the contact area (mm.sup.2) of the gaskets with the inside wall of the tubular wall falling within the range of 150 to 400.
摘要:
Behind a slidable end sealing member 3c, there is provided a liquid-absorbing element M which has a liquid-holding function so as to absorb and hold a liquid L flowing out from the end sealing member 3c when the end sealing member passes over a bypass portion 6. As this liquid-absorbent element M, such as a disk-like element D and a cylindrical element R, are typically impregnated with a water-holding and liquid-absorbing accelerator to enhance a leak preventing effect and with an antimicrobial active agent to enhance hygiene.