1424284 Epoxidizing olefins SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BV 9 March 1973 [13 March 1972] 11456/73 Addition to 1339309 Heading C2C [Also in Division B1] Oxiranes are produced by the reaction of one or more olefinic compounds with one or more hydroperoxides in the presence of solid catalyst comprising an inorganic oxygen compound of silicon and an oxide or hydroxide of Ti, Mo, V, Zr or...

The invention relates to a method for purifying aqueous solutions containing at least one impurity element from the group consisting of arsenic, phosphorus, mercury and other heavy metals and solid matter by precipitation in at least two stages with the aid of precipitation reagents possessing ions capable of forming not-readily dissolved hydroxide precipitate. In accordance with the invention the...

A method of treating domestic, commercial or industrial waste water which includes the steps of mixing the waste water with a coagulant aid so as to bring the pH of the mixture to within a range of about 9.0-10.5, and thereafter adding precipitating agents in at least two successive steps so as to lower the pH of the mixture by about one unit for each step and thereby precipitate solids therefrom ...

A method and means for regulating the thermal transmission rate at a fast fluidized bed reactor, which comprises a combustion chamber, a cyclone separator and a lock between the separator and the combustion chamber. The method comprises varying heat absorption to the conductive parts of the combustion chamber through changing the particle density in the fluidized bed when altering the load and/or ...

Disclosed are method and apparatus for operating a multi-stage process. The stages of the process are carried out in a plurality of modules arranged in sequence to receive individual batches of goods to be processed. Formulas may be devised whereby particular process steps may be effected in the various modules on particular batches of goods which determine the choice of formula. In a particular e...

A spun or drawn glass fiber for use in the area of medical implants, and particularly as a reinforcement for bioabsorbable polymeric orthopaedic and dental implants. The glass fiber is bioabsorbable and has sufficient tensile strength and elasticity to be used as a reinforcement. It is made up of 5-50% calcium oxide (CaO), 50-95% phosphorous pentoxide (P2O5), 0-5% calcium fluoride (CaF2), 0-5% wat...

Pallet, especially a disposable pallet, consisting of two outer base members (1) and preferably at least one intermediary base member (1), which base members suitably are identical and consist preferably of wood or a similar material, the height of which suitably corresponds to the conventional pallet height and the thickness of which suitably is within the range 20-100 mms, especially about 25-35...

A sulfated polysaccharide DS4152 useful as an angiogenesis inhibitor or antitumor agent is provided selectively. As the sodium salt, it has the following physicochemical characteristics. Molecular weight by the gel filtration method: 29,000 +/- 3,000. Elemental analysis: C: 24.42 - 25.76%, H: 3.34 - 3.98%, N: 0.51 - 0.89%, S: 10.6 - 11.7% and P: 0.77 - 1.06%. Sugar and protein contents: Sugar cont...

The invention relates to a vario-head endoprosthesis, consisting of a ball-shaft prosthesis (5), for example a femur prosthesis, and a vario-head socket (1, 2) which is provided with a positive safeguard for the prosthesis head, in the form of a construction of the aperture of the socket. To prevent an undesirable dislocation of the prosthesis head from the socket, the constriction is formed, acco...

Salt damage to concrete structures as a result of contact with dry salt, sea water or like salt environments can be avoided in the case of new structures and repaired in the case of damaged structures by applying a layer of slag cement concrete to the structures. The ability of slag cement to absorb chlorides and to delay chloride penetration greatly lengthens the time required to initiate corrosi...

A tape cassette with tape reels mounted therewithin having an opening portion formed in one side of the tape cassette and a notched portion formed in the lower surface of the cassette in a position adjacent to the opening portion, wherein a tape wound round the tape reels is passed along the opening portion, characterized by the combination therewith of an improved construction comprising a front ...

In accordance with the present invention an orally active monosulfactam antibiotics having a crystalline structure and thereby improved stability are disclosed. The antibiotics comprise the dierythromycin (M(+)=erythromycin.H(+)) salt or the dicholine (M(+)=HOCH2CH2N(+)(CH3)3) salt of the acid (M(+)=H(+)) having the formula that is, [3S(Z)]-2[[[1-(2-amino-4-thiazolyl)-2-[[2,2-dimethyl-...

Anthracycline glycosides of the formula I I wherein R is hydrogen or hydroxyl and the hydrochlorides thereof, and which are useful in treating certain mammalian tumors, are prepared by condensing daunomycinone with the novel sugar, 4-O-methyl-2,3,6-trideoxy-3trifluoroacetamidoribohexopyranosyl chloride in an inert organic solvent and in the presence of a soluble silver salt and a dehy...

The feed of the threads (1) to the substrate (2) provided for receiving them is ensured independently of the welding operation, by acoustic fusion; the said threads are subjected, before the said welding operation to the action of jets of compressed air imparting to them a looped appearance and the base of the loops (16) is subsequently attached to the substrate by insertion determined by the loca...

The feed of the threads (1) to the substrate (2) provided for receiving them is ensured independently of the welding operation, by acoustic fusion; the said threads are subjected, before the said welding operation to the action of jets of compressed air imparting to them a looped appearance and the base of the loops (16) is subsequently attached to the substrate by insertion determined by the loca...

The feed of the threads (1) to the substrate (2) provided for receiving them is ensured independently of the welding operation, by acoustic fusion; the said threads are subjected, before the said welding operation to the action of jets of compressed air imparting to them a looped appearance and the base of the loops (16) is subsequently attached to the substrate by insertion determined by the loca...