Method for manufacturing a compound pipe the wall of which comprises an inner layer (23) of a first material and an outer layer (24) of a second material. Powders (13,14) of the two materials are isostatically hot pressed to form a cylindrical tubular blank (15) in which the first material (13) forms an inner layer and the second material (14) forms an outer layer, the blank after heating to a sui...

Method for manufacturing a compound pipe the wall of which comprises an inner layer (23) of a first material and an outer layer (24) of a second material. Powders (13,14) of the two materials are isostatically hot pressed to form a cylindrical tubular blank (15) in which the first material (13) forms an inner layer and the second material (14) forms an outer layer, the blank after heating to a sui...

Method in reconstructing blades and vanes in steam turbines at existing erosion damages. After removal of the portion of the blade or vane having erosion damages, a replacement portion of a material that can be easily melt or dissolved, is built up on the blade or vane, said portion replacing the original profile of the blade or vane. Around the blade or vane thus reconstructed a graphite mold is ...

Method in reconstructing blades and vanes in steam turbines at existing erosion damages. After removal of the portion of the blade or vane having erosion damages, a replacement portion of a material that can be easily melt or dissolved, is built up on the blade or vane, said portion replacing the original profile of the blade or vane. Around the blade or vane thus reconstructed a graphite mold is ...

CONTROLLED COOLING OF POROUS MATERIALS Method and apparatus for cooling porous materials whereby first gases are passed through a porous material, such as polyurethane foam, in a first zone at a predetermined flow rate to cool the porous material and to remove volatiles therefrom in a first gas mixture which exits the porous material at a predetermined temperature. The first gas mixture is combine...

COOLING OF POROUS MATERIALS Method and apparatus for cooling porous materials whereby first gases are passed through a porous material, such as polyurethane foam, in a first zone at a predetermined flow rate to cool the porous material and to remove volatiles therefrom in a first gas mixture which exits the porous material at a predetermined temperature. The first gas mixture is combined with seco...

An aqueous solution for removing metals from waste water contains at least 1 wt.% sodium borohydride, at least 1 wt.% sodium aluminate and an amount of sodium hydroxide which will depend on the application. A solution made up on site and used immediately may contain as little as 0.4 wt.% NaOH. This amount should be increased to 20 wt.% for shipping in a vented container and to 30 wt.% for shipping...

A process for the preparation of a sodium polyacrylate gel It comprises treating sodium polyacrylate with water in a proportion of 1 to 10 g/l of water, for a time between 1 and 300 seconds and at a temperature between 10 and 40.degree. C to obtain the gel. The main uses of the gel is to extinguish fires and to be a means for furnishing moisture in agricultural use.

Disclosed is a foamable phenolic resin composition comprising, as indispensable components, 100 parts by weight as solids of a resol type liquid phenolic resin, 3 to 100 parts by weight of an acidic curing agent, 1 to 50 parts by weight of a blowing agent, 0.1 to 50 parts by weight of a saccharide and 0.1 to 10 parts by weight of a foam stabilizer, in which a partial or complete acetylation produc...

A method and apparatus for digital encoding are described for compressing the augmentation channel signals (chrominance and luminance signals for panel information and high frequency luminance and line sifference signal) so that this information can be transmitted in a 3 MHz wide RF channel using a digital transmission scheme such as QPSK. Analog signal components are sampled and converted to digi...

2056441 9015029 PCTABS00002 A method for the treatment of wastewater comprising subjecting wastewater and/or the settleable portion thereof to fermentation until the means cell retention time is in excess of that previously recommended for optimal acetic acid production to form a clarified product and conveying the settled product to an activated sludge treatment plant whereby effluent having redu...

14/DLR15 17877 TITLE OF THE INVENTION AVERMECTIN DERIVATIVES There are disclosed novel avermectin derivatives wherein the outer oleandrose ring of avermectin or avermectin monosaccharide is homologated by addition of diazomethane to 4"- or 4'-oxo-avermectin to afford the oleandrose 4"- or 4'-spiro-epoxide. The homologated avermectins can then be further derivatized to afford additional novel averm...

13/DLR15 17925 TITLE OF THE INVENTION AVERMECTIN DERIVATIVES There are disclosed novel avermectin derivatives wherein the outer oleandrose ring of avermectin or avermectin monosaccharide is homologated by addition of diazomethane to 4"- or 4'-oxo-avermectin to afford the perhydrooxepine derivatives. The homologated avermectins can then be further derivatized to afford additional novel avermectins....

15/DLR14 17694 TITLE OF THE INVENTION AVERMECTIN-3,4-OXIDE DERIVATIVES USEFUL AS ANTIPARASITIC AGENTS AND INSECTICIDES There are disclosed avermectin derivatives in which the 3,4-double bond of the avermectins has been epoxidized. The compounds are prepared by oxidation of 7-0-trimethylsilyl-avermectins followed by deprotection. The compounds are active antiparasitic agents and insecticides and co...

F-5180 CATALYTIC DEWAXING PROCESS FOR PRODUCING LUBRICATING OILS Lubricant oils of low pour point and improved oxidation stability are produced by catalytically dewaxing a lube feedstock over a zeolite dewaxing catalyst such as ZSM-5 in the hydrogen or decationized form and without a metal hydrogenation component. The use of these catalysts enables products of excellent oxidative stability to be o...

A technique for forming a mold to replicate large numbers of plastic articles, such as by injection or blow molding, wherein the mold contains a hologram or other microstructure for transfer to an outside surface of the molded article. The mold is made by electrodepositing a metal on a model of the article to be molded. Before this deposition, the hologram or other microstructure is formed on a su...

Compositions for Compression Refrigeration and Methods of Using Them A blend of a tetrafluoroethane or pentafluoroethane refrigerant with a mono-functional random polyalkylene glycol based on significant amounts of ethylene oxide and propylene oxide and having an SUS viscosity at 100.degree.F of 100 to 1200 is disclosed for use in compression refriyeration.

Refrigeration Compositions and Process for Using A blend of a tetrafluoroethane or pentafluoroethane refrigerant with a di-functional random polyalkylene glycol based on significant amounts of ethylene oxide and propylene oxide and having an SUS viscosity at 100.degree.F of 100 to 1200 is disclosed for use in compression refrigeration.

A replacement gastrostomy tube device (10) is provided comprising a catheter shaft (1) having an outer surface wall (13), with the shaft enclosing a feeding lumen (14) of substantially circular cross-section and a fluid flow channel (16). A port housing (18) is located at the proximal end of the shaft with the port housing having a main food inlet port (20), a Y-port (23) and a fluid inlet port (2...

Electromagnetic valve for controlling the flow of a liquid metal or metal alloy in a pressurized pipe (13,15), said valve comprising a tubular body (1) made of a material which is permeable to magnetic fields, and a polyphase field coil (2) arranged around said tubular body in order to create a magnetic field for sliding lengthwise along said tubular body. Said valve is characterized in that it co...