A silica-titania cogel is produced in a two-step process wherein in the first step an alkyl polysilicate and/or a tetraalkyl silicate is partially hydrolyzed in an alkaline organic solvent using insufficient water to complete hydrolysis and thereafter a tetraalkyl titanate and an excess of water are added to complete the hydrolysis. The resulting product is as good or better than silica-titania co...

Ferroniobium and chlorine gas are heated to 600-800 deg.C to form a mixture of (NbCl5)2, Fe2Cl6, Al2Cl6 and SiCl4 gases that are purified by passing through a column of hot NaCl pieces (at 280-300 deg.C). The impurities react with NaCl and collect at the bottom of the column in liquid form, the purified (NbCl5)2 steam is then condensed at below 280 deg.C. The granules of NaCl are of 30-40 mm dia. ...

A method is proposed to operate waste wood burning gas generator at reduced pressure. Fresh air for combustion is pre-heated in a tar removing heat exchanger and between the double walls of the gas generator. The heated air is then used to dry the fuel before it is drawn into the furnace.

Method involves the separate handling of condensates having high and low content of ammonia cpds. This is achieved by suitable arrangement of the heat recovery equipment.

Industrial cooling water is treated continuously or batch wise with corrosion and hardness deposit inhibitors, at intervals of less than 21 days with dispersing agents and with biocide compsns - In continuous operation 1-100 mg per litre phosphonic-acid derivs. are added as corrosion inhibitor. The dispersing agent is e.g. polyethylene-glycol in aq.-alcoholic soln. or a polyethylene -glycol deriv....

A mixture comprising (% v/v) 65-90 of a good quality refined stone grist of different colour and some synthetic additives and 10-35 binding agent, that is a colourless, insoluble, reactive, artificial resin based on epoxyresin and a polyamide hardener is homogenised and cast into a plaster or silicon rubber mould. The plaster mould is coated with an aqueous soln. of carboxymethyl cellulose and dri...

Fly-ash from power stations is consolidated and transformed into compsns. useful as land fill, soil improver or for returning disused mining areas to cultivation, by mixing with 20-70 wt.% of a binder consisting of the clay mineral contg. mud of waste ore resulting from hydrometallurgical ore processing, or with a mixt. of the waste ore mud with clay, and adjusting the water content of the resulti...

Rhizobium concentrates with good herbicide tolerance, are prepd. by first isolating Rhizobium varieties from live root tissue of selected high-nitrogen binding leguminosae, (2) treating the Rhizobium with herbicides normally used in the cultivation of leguminosae and other important crops like maize or wheat, (3) inoculating a synthetic mixt. of the most important leguminosae with the Rhizobium su...

It is proposed that the nodules are removed from the plant roots, cleaned, crushed and mixed with water (4 parts by weight of water to one part of nodule material). The mixt. is homogenised until a thick, milky material is obtained, which is then strained several times to remove foreign material and the fibrous cell-wall material of the nodules. - The suspension is mixed with a further 5 parts of ...

1. Process for the hydrogenative reprocessing of carbon containing waste materials, with the exclusion of a process for hydrocracking of waste tires in the presence of a catalyst of an iron compound and an auxiliary catalyst of metal compounds of the group Cr, Mo, W, Se and Te, based on a synergistic catalyst action with sulfur, by treatment of the waste materials with hydrogen und/or hydrogen tra...

Prodn. of fluoroformates of formula (I) is effected by reacting a carbonate ester of formula (II) with a fluoride (III) in the presence of a cryptate, a linear or cyclic polyether or a polar aprotic solvent at 20-120 deg.C with continuous removal of (I) and/or by-produced aldehyde from the reaction mixt. as they are formed. R1 = an opt. substd. satd. or unsatd. aliphatic, cycloaliphatic or polycyc...

A process for the preparation of a halogenated aroylacetic acid ester of the formula in which R is alkyl with 1-6 carbon atoms, X and X2 each independently is halogen, and X1 and X3 each independently is hydrogen or halogen, comprising reacting a benzoyl chloride of the formula with dichloroethylene in the presence of anhydrous aluminum chloride to form the corresponding be...

Compounds of the following Formula I are novel inhibitors and some at least of said compounds selectively inhibit MAO-B: wherein:- R1 and R2 independently represent hydrogen, chlorine or fluorine: R3 represents hydrogen or (C1-C4) alkyl; and X represents oxygen or sulfur. They are useful for the treatment of depression and, co-administered with L-dopa, in the treatment of Parkinsonism.

Tetrahydronaphthalene derivatives of the formula I wherein Y, m, n, R and R1 to R9 are as set forth herein, are described. These compounds have a pronounced calcium-antagonistic and anti-arrhythmic activity and can accordingly be used as medicaments, especially for the control or prevention of angina pectoris, ischaemia, arrhythmias and high blood pressure. The compounds of formula I c...

1. Chain lengthening or cross-linking agent for polyurethanes and epoxy resins, consisting of 2,6,2',6'-tetraethyl-p,p'-methylene-bis-aniline, 2,6,2'-triethyl-6'-chloro-p,p'-methylene-bis-aniline and 2,2'-dichloro-6,6'-diethyl-p,p'-methylene-bis-aniline.

1. Phenylethylaminopropiophenone derivatives of the general formula (I) see diagramm : EP0167945,P10,F4 in which R**1 represents hydrogen, lower alkyl which is optionally substituted by fluorine, or halogen, R**2 denotes hydrogen or lower alkyl and R**3 denotes hydrogen, alkoxy or halogen, and their physiologically acceptable salts with inorganic or organic acids.

Diphenylazomethine derivatives of formula (I) (I) wherein R1 is hydrogen or methyl and R2 is an -OH,-OM (M=alkaline metal or alkaline earth metal), -NH2 or -O(C1-4 alkyl) group, and which are in the form of cis or trans isomers or mixtures thereof, have central nervous system activity and can be used as antidepressants and anticonvulsants.

Amidinohydrazones of the formula I in which R, X and A have various meanings, are used in medicaments, in particular in circulation-influencing medicaments.

The present invention relates to a new class of alkylsulfonamidophenylalkylamines which are potent antiarrhythmic agents having good oral bioavailability properties.

In the production of an S-substituted isothiourea including the function group in which R1 is an alkyl, alkenyl, aryl or aralkyl radical, wherein a thiourea including the functional group is reacted with an etherifying agent to replace H by R1, the improvement which comprises effecting the reaction in two steps, in the first step reacting the thiourea material with an etherif...