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Hoefnagel, A.J. (author), Van Bekkum, H. (author)Abstract of WO 9414746 (A1) The invention relates to a method for separating the ortho- and para-isomers of hydroxymandelic acid or a salt thereof. For that purpose the starting material is a solid mixture of these ortho- and para-isomers in the alkali metal salt form. This mixture is extracted with a polar, aprotic, organic solvent. Then this...patent 1994
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Sheldon, R.A. (author), Chen, J.D. (author), Dakka, J. (author)Abstract of WO 9408932 (A1) The invention relates to an improvement in carrying out a catalyzed decomposition of organic hydroperoxides. The improvement consists in the use of a heterogeneous catalyst which is composed of a three-dimensional microporous structure, a so-called molecular sieve, containing aluminum, silicon and/or phosphorus oxides...patent 1994
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Van der Knaap, A.C. (author), Pacejka, H.B. (author)Mass spring system for use in a vehicle, in which the sprung mass (4) is connected to a support (1) by means of at least one bearing arm (2) and a spring leg (6). The mass spring system is equipped with an antiroll/pitch mechanism comprising an auxiliary spring (18), of which the axis is movable, of which auxiliary spring (18) one end (16) is...patent 1993
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Hoefnagel, A.J. (author), Van Bekkum, H. (author)The invention relates to a process for the preparation of polyhydroxybenzophenones by treating benzoic acid or a derivative thereof with a polyhydroxybenzene or a derivative thereof in the presence of a large pore zeolite as a catalyst.patent 1993
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Langeveld, A.D. (author), Makkee, M. (author), Moulijn, J.A. (author)Abstract of NL 9102029 (A) Described is an arrangement for carrying out TAP experiments. Such an arrangement comprises a reaction chamber in which a very short-lived beam of molecules is directed at a target to produce a short-lived beam of intermediate-product molecules, and a vacuum chamber where said intermediate-product molecules travel from...patent 1993
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Van der Kamp, T. (author), Scholten, J.J.F. (author)Abstract of NL 9101743 (A) The method according to the invention for preparing cycloalkene by partial hydrogenation of an aromatic hydrocarbon by bringing the aromatic hydrocarbon, in the presence of hydrogen, into contact with an Ru-, Rh-, Pd-, Ir- or Pt-metal-containing catalyst in a polar medium containing a soluble salt is characterized in...patent 1993
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Wojtowicz, M.A. (author), Moulijn, J.A. (author)Abstract of WO 9318341 (A1) A method and an apparatus are described for combusting carbonaceous materials in a two-stage process. In a first reaction chamber (2), operating under fuel-rich conditions in a bubbling fluidisation regime, fuel undergoes primary combustion or gasification. Oxidising gas (5) is fed into the first reaction chamber at a...patent 1993
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Coenen, A.J.R.M. (author)Abstract of NL 9101155 (A) Method for code acquisition in a satellite receiver. The biphase-modulated high-frequency carrier transmitted by a satellite is converted via a fixed local oscillator frequency down to the baseband, whereafter the baseband signal is fed via a bandpass filter, which has an adequately broad pass band to allow the...patent 1993
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Geus, E.R. (author), Den Exter, J. (author), Van Bekkum, H. (author)Abstract of NL 9101148 (A) The present invention relates to an inorganic composite membrane which contains molecular-sieve crystals and comprises a porous support, more particularly a support converted into the form of a membrane module, on which molecular-sieve crystals are disposed which have been obtained by a reaction of a precursor of said...patent 1993
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Janssen, J.C. (author), Van Bekkum, H. (author)Abstract of WO 9300155 (A1) A method of applying molecular sieve crystals to a support, wherein the surface of the support is brought into oxidic condition, whereafter the support is contacted with a solution of the molecular sieve-forming compound or compounds or precursors thereof, whereafter crystallization on the surface is effected.patent 1993
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- Pronk, J.T. (author), Van Dijken, J.P. (author), Bos, P. (author), Kuenen, J.G. (author) patent 1992
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Geus, E.R. (author), Jansen, J.C. (author), Jaspers, B.C. (author), Schoonman, J. (author), Van Bekkum, H. (author)Abstract of WO 9213631 (A1) Inorganic composite membrane containing molecular sieve crystals, comprising a macroporous support to which molecular sieve crystals and modifications thereof have been applied substantially as a monolayer, said crystals and modifications thereof having been oriented so that, to a substantial extent, the pores of the...patent 1992
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Frens, G. (author)Prodn. of a support contg. Al2O3 with an active component and/or precursor for this is carried out by the sol/gel technique by (a) producing a sol from AlCl3 or material forming Al2O3, (b) supplying the sol to the top of a column filled with a water-immiscible solvent (I) in the upper pt. and an alkaline aq. soln. (II) contg. the active...patent 1991
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Schuiling, R.D. (author)Abstract of corresponding document: WO 8909251 (A1) The present invention relates to a procedure for locally raising the ground artificially, wherein an equivalent quantity of the calcite (CaCO3) present in the porous underground limestone formations is converted into gypsum (CaSO4.2H2O) by injecting a quantity of sulphuric acid. Preferably a 20...patent 1991
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Berkhout, A.J. (author), Van Hoorn, W.A. (author)Abstract of EP 0453014 (A1) Scanner for scanning surfaces with ultrasonic signals, in particular surfaces of parts of the body, provided with a scanner head (5) for the transmission of ultrasonic signals and the reception of the echoes hereof. The time passed between the emission of the signal and the reception of the echoes thereof, is a...patent 1991
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Abstract of NL 8902116 (A) In a honeycomb core material for a sandwich construction, the common hexagonal walls are bonded together by a thermoplastic resin, and the free hexagonal walls carry a layer of the same resin and also a masking agent. - A number of plates of raw material are given strips of glue, are laid on one another, and are...patent 1991
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Coenen, A.J. (author)Abstract of WO 9104611 (A1) System for converting a PCM input signal with uniform noise spectrum, comprising a series of digital words each of K-bits appearing with a predetermined repetition frequency, into a PCM output signal with a non-uniform noise spectrum comprising a series of digital words each of L-bits, L being smaller than K. The...patent 1991
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Abstract of NL 8902368 (A) The system converts a PCM input signal. It has a series of digital words, each K bits long at a predetermined repetition frequency converted into a PCM output signal (16) comprising a series of digital words each L bits long, where L is less than K. The system includes a one-bit coder to provide a shaped noise profile...patent 1991
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Verbeek, D.G.F. (author)Abstract of WO 9105620 (A1) Method and apparatus for cleaning a storage or transport tank or similar receptacle by spraying a cleaning agent against the interior wall using at least one spray nozzle, said nozzle making a rotating movement in a plane, while said plane is simultaneously revolved around an axis which makes an angle with the axis of...patent 1991
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Van Breemen, A.N. (author)Abstract of WO 9006820 (A1) The noxious element arsenic may be removed with high efficiency from iron hydroxide sludge by first subjecting that sludge first to a thermal treatment in the presence of air or oxygen and of an alkaline reagent and next extracting the treated material with water. The arsenic present in the extract is thereupon...patent 1990