Catalytic production of dimethylamine in preference to mono- and trimethylamine over a mordenite catalyst is disclosed, which mordenite is characterized by its alkali metal content.

A semiconductor memory device for example having a multi-bit output structure comprises a plurality of memory cell blocks (10, 12), a data bus (18, 20) corresponding to each memory cell block, a plurality of groups of redundant memory cells (14, 16), and switching circuits (S1, S2, S3). The switching circuits selectively connect the output of a group of redundant memory cells to the data bus of a ...

T 5318 PROCESS FOR THE SEPARATION OF SOLVENTS FROM HYDROCARBONS DISSOLVED IN SAID SOLVENTS A process for the separation of solvents from hydrocarbons dissolved in said solvents wherein a feed solution comprising hydrocarbons dissolved in an aromatic solvent and a polar aliphatic solvent is contacted at elevated pressure with one side of a dense, supported, plasma treated membrane which is substant...

L'invention concerne un azéotrope à point d'ébullition minimum, utilisable comme fluide frigorigène en remplacement des chlorofluorocarbures ou comme agent extincteur en remplacement des bromofluorocarbures et chlorobromofluorocarbures. Cet azéotrope est un mélange de 1,1,1,2-tétrafluoroéthane et de perfluoropropane. Au point d'ébullition normale (environ -41,1.degree.C sous 1,013 bar), sa teneur ...

A gain control arrangement is used for reproducing digital signals obtained by analog-to-digital conversion of analog audio signals, such as on reproduction from a digital audio disc (1). The digital signal SD2 obtained is delayed by a circuit (4). Utilizing the delay time, the components of the reconverted analog signal SA which exceed a predetermined level are suppressed in response to a signal ...

Electrical discharge machining appts. includes - a wire reeling device which can withdraw a wire from a work zone and feed out wire holding a wire broken end, - a detector which detects when a wire broken end is clear of the work zone, - a device which responds to this detector's output and moves a wire broken end to and from a repair position, - a cutter for trimming the broken wire end at the re...

Zinc powder for alkaline batteries The powder is free from Cd and Tl and it contains 0.005-2 % aluminium as well as either 0.0001-0.01 % REM, REM being a rare earth metal or a mixture of rare earth metals; or, besides zinc and unavoidable impurities, only 0.0001-2 % of at least one of the elements indium and REM; or, besides zinc and unavoidable impurities, only 0.003-2 % bis muth and 0.0001-2 % o...

The present invention relates to a composition containing peracetic acid, hydrogen peroxide, mineral acid and water. For the purpose of improving the stability of the peracetic acid, it also contains dipicolinic acid and at least one phosphonic acid having capability of complex binding divalent metal cations. The invention also concerns a method of preparing peracetic acid from acetic acid and hyd...

The present invention relates to a composition containing peracetic acid, hydrogen peroxide, mineral acid and water. For the purpose of improving the stability of the peracetic acid, it also contains dipicolinic acid and at least one phosphonic acid having capability of complex binding divalent metal cations. The invention also concerns a method of preparing peracetic acid from acetic acid and hyd...

The compounds of the present invention comprise substituted phenolic thioethers represented by the formula: (I) wherein: R1 and R2 are the same or different and independently represent tert-alkyl or phenyl; A represents methylene or methylene substituted by alkyl, dialkyl or hydroxy, provided that when A includes hydroxymethylene, the hydroxymethylene group is not adjacent to a heteroat...

In order to pump gas/liquid mixtures of relative concentrations which are not best suited to efficient operation of the pump, apparatus is provided to split the mixture into a relatively gas rich branch 14 and a relatively gas reduced branch 15. The pump 16 is located in the branch where the concentration is better suited to its efficient operation. The mixtures in the branches are combined downst...

A knitting machine has at least one bed with a plurality of lands forming tricks for supporting knitting implements, and a cam arrangement for controlling the knitting implements and including a cam plate, at least one carrier mounted to the cam plate at a fixed spacing from the bed, at least one cam portion and a mounting element for non-rotatably mounting the cam portion to the carrier. The moun...

The coupling device for model railway vehicles has a coupling head with coupling body (17) which has a coupling fork at one end and a holder at the other end. The coupling yoke (23) which is swivel-mounted in the coupling body swivels in a plane running parallel to a side wall (19) of the coupling body and has an arm projecting in the direction of the coupling body (17) to form a coupling extensio...

An insecticidal and/or acaricidal and/or nematicidal composition having a rapid efficacy and residual activity which comprises a mixture of a poorly water-soluble organophosphorus insecticide and/or acaricide and/or nematicide and/or a poorly water-soluble carbamate insecticide and/or acaricide which have been microencapsulated in water-insoluble polymer coatings with a dispersing agent used in fo...

Apparatuses for the regeneration of etching solutions which are associated directly with an etching system are known. The disadvantage of these is the fluctuating need of the etching system over a period of time in connection with the quasi-continuous working methods of the known apparatus, which essentially consists of an electrolytic cell which is used for the anodic re-oxidation of the etching ...

2045398 9107591 PCTABS00005 The micropump comprises a silicon wafer (22), glass wafers (2, 24) and a control element (26). The wafer (22) is machined to define an inlet valve (36), a pump chamber (34) and an outlet valve (48). The inlet valve (36) comprises a membrane (40) defining an upstream compartment (38) and a downstream compartment (62), an orifice (42) and a sealing ring (46) surround...

An elongated source (20) of charged particles is utilized in a lithographic system to form multiple focused electron (or ion) beams (32) arranged in a linear array. The multiple beams are scanned across a workpiece (10) and, by selective blanking (50) of individual ones of the beams, patterns can be formed on the workpiece.

The yarn (3) is illuminated by a transmitter (1) and the light reflected by the yarn surface is fed to a detector (5) and evaluated, the optical path being selected such that the receiver (5) receives light only from that side of the yarn (3) that is not illuminated.

A composition for imparting fire-resistance to laminating interlayers comprising (a) a plasticizer blend of a char-forming component, such as an organic phosphate, and an oxygen sequestering agent, such as an organic phosphite, wherein the char-forming component is the major constituent; (b) a nucleating agent such as fumed silica, for dispersing fire decomposition products of the interlayer; and ...

An appliance support as used in particular in intensive care stations of hospitals comprises a support arm for receiving support members for the appliances and supply connections for operating, the same. Such an appliance support shall be modified to allow as many appliances, such as pumps and the like, as possible to be mounted thereto and to be movable relative thereto. To this end the support a...