Biodegradable controlled release delivery systems using melt-spun biodegradable polymers as carriers for bio-effecting agents such as pharmaceutical actives are disclosed. Oral dosage forms as well as implants are described.

Biodegradable controlled release flash flow melt-spun delivery system

Disclosed herein are systems for removing particulate matter from a fluid, comprising a particle functionalized by attachment of at least one activating group or amine functional group, wherein the modified particle complexes with the particulate matter within the fluid to form a removable complex therein. The particulate matter has preferably been contacted, complexed or reacted with a tethering agent. The system is particularly advantageous to removing particulate matter from a tailing solution.

Systems and methods for removing finely dispersed particulate matter from a fluid stream

The present invention relates to a catalyst for wastewater treatment and a method for wet oxidation treatment of wastewater using the catalyst, in particular, the catalyst of the present invention can suitably be used in wet oxidation treatment of wastewater, under high temperature and high pressure conditions. The present invention provides a catalyst for wastewater treatment containing a catalytic active constituent containing at least one kind of an element selected from the group consisting of manganese, cobalt, nickel, cerium, tungsten, copper, silver, gold, platinum, palladium, rhodium, ruthenium and iridium, or a compound thereof, and a carrier constituent containing at least one kind of an element selected from the group consisting of iron, titanium, silicon, aluminum and zirconium, or a compound thereof, characterized in that solid acid amount of the carrier constituent is equal to or more than 0.20 mmol/g.

Catalyst for wastewater treatment and method for wastewater treatment using said catalyst

Simultaneous synthesis and purification of a fatty acid monoester biodiesel fuel from a triacylglycerol feedstock is described. In an exemplary method, the triacylglycerol feedstock is continuously contacted with a catalytic chromatographic bed comprising a first (solid phase) basic catalyst through a first port of a simulated moving bed chromatographic apparatus. A monohydric alcohol and optional second (mobile phase) basic catalyst is continuously contacted with the catalytic chromatographic bed through a second port and pumped in a first direction toward the triacylglycerol feedstock to contact the triacylglycerol in a reaction zone of the catalytic chromatographic bed where the fatty acid monoester and glycerol coproduct are formed. The fatty acid monoester is removed from the reaction zone through a product port of the simulated moving bed apparatus. Segments of the catalytic chromatographic bed are incrementally moved in a second direction, opposite the first direction, and the glycerol is removed from a raffinate port located opposite the product port of the apparatus.

Simultaneous synthesis and purification of a fatty acid monoester biodiesel fuel

A float (3) is attached by verticle mooring lines, or cables (8), to a pivoting lever device (2) which is mounted on a submerged anchor (1). The lever device is oriented perpendicular to the shoreline, with one arm of the lever pointing shoreward and the other pointing upward. The shoreward pointing arm is almost horizontal in orientation and long enough to compensate for tidal variations. The lines (8) from the float are attached to the end of the shoreward pointing arm. Verticle pull of the float will pull upward on the shoreward pointing arm (2B) and cause it to pivot about sealed bearings (2C), which causes the upper arm of the lever device (2A) to rotate in a largely horizontal arc away from shore, thus pulling on the main drive line (7) which is attached to the end of the upward pointing arm and which leads to shore. During wave troughs the float falls naturally and the lever device is returned to its prior position by the pull exerted on the main drive line (7) by a falling weight (11) which is located in the enclosed shore structure (6), in which an energy extraction device is also located. The shore structure has a device which temporarily restrains upward motion of the float as waves pass under it, so that when released it travels upward for a greater distance and with more velocity than it would otherwise obtain. The primary advantages are: (1) eliminating the need for any pier or frame exposed to the waves and storm damage; and (2) eliminating the need for cables to pass back and forth through pulleys with each rise and fall of the waves.

Ocean wave energy conversion device

As catalysts for producing aromatic amines by hydrogenating aromatic nitrites, there are disclosed (1) the catalyst comprising a metal catalyst component comprising Ni and/or Co and a specific amount of zirconia as a carrier component, which is prepared by drying, calcining and forming a precipitate produced by adding an aqueous solution containing soluble salts of the metal catalyst component and the carrier component to an aqueous alkali solution; and (2) the catalyst comprising the metal catalyst component and the carrier component, which is prepared by filtering a precipitate produced by adding an aqueous solution containing soluble salts of the metal catalyst component and the carrier component to an aqueous alkali solution; forming the precipitate without drying to obtain a formed product; and subjecting the formed product to drying and then calcining. These catalysts are free from breaking owing to rapid generation of methane and evaporation of liquid ammonia by hydrogenolysis of high boiling by-products of the hydrogenation when reactivated after deactivation of the catalyst, which allows the long-term use of the catalysts.

Catalysts and process for producing aromatic amines

A process for preparing a silica-titania catalyst by adding an acidic solution containing a silicon compound such as sodium silicate and a titanium compound such as titanium sulfate dissolved therein to a solution of a compound such as ammonium bicarbonate to bring about co-precipitation, in which the acidic solution is a highly concentrated nitric acid-acidic or sulfuric acid-acidic solution, and a ratio of the dissolved titanium compound in the acidic solution is regulated in a certain range. According to this process, a catalyst capable of exerting a high performance in an esterification reaction and the like can be efficiently obtained.

Process for preparing silica-titania catalyst

A process for preparing a carboxylic acid ester which includes subjecting a carboxylic acid and an alcohol or a phenol to an esterification reaction in the presence of a silica-titania catalyst. The silica-titania catalyst is prepared by adding an acidic solution containing a silicon compound and a titanium compound dissolved therein to a solution of a basic compound to bring about co-precipitation, in which the acidic solution is a nitric acid-acidic solution or a sulfuric acid-acidic solution, a ratio of the amount (gram equivalent) of nitric acid or sulfuric acid to the amount (mol) of the silicon compound in the acidic solution is 0.5 to 50 and the amount of the titanium compound in the acidic solution is such that a ratio of titania (TiO2) in the silica-titania catalyst is 1 to 50% by weight.

Process for preparing a carboxylic acid ester

An improved process for producing aromatic polyethers by condensation polymerizing aromatic dihydroxy compounds represented by the general formula: HO--Ar--OH and aromatic dichloro compounds represented by the general formula: Cl--Ar 1 --Y--Ar 2 --Cl, or condensation polymerizing monohydroxymonochloro aromatic compounds represented by the general formula: HO--Ar 1 --Y--Ar 2 --Cl (in the above formulae, Ar, Ar 1 , Ar 2 are as defined in the specification) in the presence of alkali metal compounds comprising a combination of alkali metal carbonates comprising carbonate and/or hydrogencarbonate of an alkali metal, eg, potassium, and alkali metal fluorides In accordance with the present process, high molecular weight aromatic polyethers can be efficiently produced from aromatic chloro compounds which are inexpensive and easily available

Process for production of aromatic polyethers with alkali metal carbonate/bicarbonate/fluoride cocatalyst

A carbocyclic or heterocyclic compound, ammonia and an oxygen-containing gas are subjected to fluid catalytic reaction in vapor phase in the presence of a catalyst containing alkali metal to produce an aromatic or heterocyclic nitrile. The use of the catalyst containing a specific amount of alkali metal enables the stable production of the aromatic or heterocyclic nitrile in high yields with little change with time even when water is present in the reaction system. The use of the catalyst containing the alkali metal also enables the recycle and reuse of unreacted ammonia which is usually accompanied by water, thereby reducing production costs.

Ebata Shuji

Papers

Catalysts and process for producing aromatic amines

Process for preparing silica-titania catalyst

Process for preparing a carboxylic acid ester

Process for production of aromatic polyethers with alkali metal carbonate/bicarbonate/fluoride cocatalyst

Process for producing aromatic and heterocyclic nitriles