Abstract: 6-Methyl-3,4-dihydro-1,2,3-oxathiazin-4-one 2,2-dioxide is prepared by cylcizing acetoacetamide-N-sulfonic acid or its salts with an at least approximately equimolar amount of SO.sub.3 in the presence of a water-immiscible, inert organic solvent and, if appropriate, also an inert, inorganic solvent. In the event that an equimolar amount of SO.sub.3 is employed, working up is effected by adding aqueous sulfuric acid when the cyclization reaction is complete; in the event that the amount of SO.sub.3 employed is more than equimolar, the 6-methyl-3,4-dihydro-1,2,3-oxathiazin-4-one 2,2-dioxide obtained in the form of the SO.sub.3 -adduct is hydrolyzed by adding water or ice, whereby sulfuric acid is formed from the SO.sub.3 combined in the SO.sub.3 -adduct.The inert, organic solvent is then removed from the resulting multi-phase mixture by distillation, and the 6-methyl-3,4-dihydro-1,2,3-oxathiazin-4-one 2,2-dioxide is obtained in a pure form from the remaining aqueous sulfuric acid phase by crystallization.

Abstract: A process for the preparation of a crystalline sheet-type alkali metal silicate is described, in which an aqueous solution of an alkali metal silicate or a suspension of an amorphous alkali metal silica having a molar ratio M.sub.2 O (unneutralized)/SiO.sub.2, where M represents an alkali metal, of 0.05:1 to 0.8:1 is allowed to react at temperatures of 70.degree. to 250.degree. C. until the sheet-type alkali metal silicate crystallizes out. After the beginning of crystallization, an acidic compound is added in an amount such that an M.sub.2 O (unneutralized)/SiO.sub.2 ratio of 0.05:1 to 0.8:1 is constantly maintained in the mother liquor of a filtered sample. However, at least an amount corresponding to 5 milliequivalents of H.sup.+ per mole of SiO.sub.2 in the alkali metal silicate used is added. The use of seed crystals of the desired sheet silicate is advantageous.

Abstract: Tertiary phosphine oxides are prepared by oxidation of tertiary phosphine sulfides using H.sub.2 O.sub.2 in a solvent comprising about 2-20% by weight of optionally halogenated lower aliphatic carboxylic acids and the remainder of mono- or polyhydric aliphatic or cycloaliphatic alcohols--if appropriate in mixtures with other inert solvents which are miscible with the carboxylic acid/alcohol mixture. Preferred solvents comprise acetic acid/methanol and acetic acid/ethanol mixtures.The reaction products are final products and intermediates products in various specialized fields such as, for example, the plant protection sector and the polymers sector.

Abstract: Phosphoric acid substantially free from titanium is made from the organic extract obtained by subjecting crude phosphoric acid containing titanium to extractive purification with an organic solvent immiscible or only partially miscible with water. To this end, the organic extract is scrubbed in a scrubbing zone with a stage number of n>4 by introducing the crude extract into stage 1 and scrubbing it countercurrently with an aqueous alkaline solution in one of stages 2 to n-2 and with pure scrubbing water in stage n.

Abstract: There are disclosed compounds having the formula ##STR1## wherein m is 1 or 2; n is 1 or 2; p is 1-5; x is hydrogen, loweralkyl, cycloalkyl, loweralkoxy, halogen, hydroxy, nitro, trifluoromethyl, formyl, loweralkylcarbonyl, arylcarbonyl, --SH, loweralkylthio, --NHCOR.sub.2 or --NR.sub.3 R.sub.4 where R.sub.2 is hydrogen or loweralkyl, and R.sub.3 and R.sub.4 are independently hydrogen, loweralkyl or cycloalkyl; R is hydrogen, loweralkyl or loweralkylcarbonyl; and R.sub.1 is hydrogen, loweralkyl, loweralkylcarbonyl, aryl, diloweralkylaminoloweralkyl, arylloweralkyl, diarylloweralkyl, oxygen-bridged arylloweralkyl or oxygen-bridged diarylloweralkyl; stereo, optical and geometrical isomers thereof, and pharmaceutically acceptable acid addition salts thereof, which are useful for enhancing memory.

Abstract: Water-soluble disazo compounds conforming to the general formula (1) ##STR1## and their 1:1 copper complex compounds which possess useful fiber-reactive dye properties and are capable of dyeing carboxamido- and/or hydroxy-containing materials, in particular cellulose fibers, in fast shades; wherein:D.sup.1 and D.sup.2 are each a phenylene, which may be substituted, or a naphthylene optionally substituted by sulfo; in the case of the copper complex compounds the ortho-position in D.sup.1 or D.sup.2 or in both being substituted by an oxy group complex-bonded to the copper, or D.sup.1 is a radical of the formula (2a), (2b) or (2c) ##STR2## or D.sup.2 is a radical which is the reverse of formulas (2a), (2b) or (2c), in whichR.sup.1 and R.sup.2 are each independently of the other hydrogen, nitro, sulfo, methyl, ethyl, methoxy or ethoxy;K.sup.1 is a radical of the formula (3a), (3b) or (3c) ##STR3## and K.sup.

Abstract: Hardeners are described for synthetic resins which contain groups which are capable of ester or amide formation and, if appropriate, polymerizable double bonds. The new hardeners, which allow lower crosslinking temperatures, are products (A) of the Michael addition of compounds (B), containing Michael addition-capable ester groups, to compounds (C) which contain at least two Michael addition-capable double bonds, the products (A) having an average of at least one polymerization-capable double bond and at least two transesterification- or transamidation-capable ester groups per molecule and the compound (B) representing products of the reaction of (b1) CH-active alkyl esters and (b2) polyisocyanates.

Abstract: A process for reacting substrates with biocatalysts in a two-phase liquid system disposed in a columnar vessel having a top portion with an exit opening and a first filter disposed therein, a bottom portion with an entrance opening and a second filter disposed therein, a feed line connecting the exit and entrance openings, and a pump disposed in the feed line. The process comprises the steps of: stirring the two-phase liquid in the columnar vessel to accelerate sedimentation and minimize accumulation of the biocatalysts in the top portion of the vessel; selectively controlling the temperature of the two-phase liquid within the vessel; drawing, with the pump, a portion of the two-phase liquid through the exit opening and first filter; and passing the drawn-off portion of the two-phase liquid through the feed line and through the entrance opening and second filter into the vessel to enhance miscibility of the individual phases of the two-phase liquid with the vessel.

Abstract: Resin solution for cements and coating compositions based on a reaction product of epoxy resins having more than one epoxy group in the molecule and furfuryl alcohol alone or in admixture with other furan derivatives dissolved in reactive diluents and process for its preparation. These resin solutions are used for preparing cements and coating compositions by mixing the resin solution immediately before use with (A) at least one filler and (B) at least one curing agent or a mixture of (A) and (B), the weight ratio of the solution to the sum of components (A) and (B) being 1:(0.5-7), preferably 1:(1-4).

Abstract: The non-toxic salts of 6-methyl-3,4-dihydro-1,2,3-oxothiazin-4-one 2,2-dioxide are prepared by cyclizing acetoacetamide-N-sulfonic acid or its salts with an at least approximately equimolar amount of SO3 in the presence of a water-immiscible, inert organic solvent and, if appropriate, also an inert inorganic solvent, hydrolyzing the 6-methyl-3,4-dihydro-1,2,3-oxathiazin-4-one 2,2-dioxide obtained in the form of the SO3-adduct after the cyclization reaction, in the event that the amount of SO3 employed is more than equimolar, purifying the organic phase (which has separated out) by extraction with a small volume of water or dilute aqueous sulfuric acid, preferably only with water, and isolating, by neutralization with bases, the non-toxic salts of the 6-methyl-3,4-dihydro-1,2,3-oxathiazin-4-one 2,2-dioxide from the organic phase thus purified.The said salts are obtained in this process in an extremely pure form; they are valuable synthetic sweetening agents. The potassium salt is known as acesulfam (K).

Abstract: Subject of the invention are liquid pesticidal compositions in the form of aqueous suspension concentrates, which in addition to the active substance or mixture of active substances contain an alkali metal salt of sulfosuccinic acid semiester prepared by reaction of a polyglycol ether of a condensation product of (C.sub.8 -C.sub.12)-alkylphenol and formaldehyde with maleic anhydride and an alkali metal sulfite, in combination with a mixture of an alkali metal salt of a ligninsulfonic acid and identical parts of a swelling alkaline earth metal silicate. These suspension concentrates have an advantageous stability to storage.

Abstract: In one embodiment this invention provides a nonlinear optical medium which is a transparent film of a thermoplastic polymer composed of recurring monomeric units corresponding to the formula: ##STR1##

Abstract: Alkylated glycosyl fluorides free from hydroxyl groups can be prepared by converting glycosyl fluorides which still contain hydroxyl groups into the alkylated compounds in the manner of Williamson's ether synthesis in the presence of basic systems by means of alkylating agents.

Abstract: A photosensitive polyimide polymer composition comprising a solvent soluble polyimide condensation product of an aromatic dianhydride and an aromatic diamine, a polyfunctional ethylenically unsaturated monomer and a photoinitiator. The solvent soluble polyimides of the composition are prepared from at least one compound selected from 2,2-hexafluoro-bis-(3,4-dicarboxyphenyl)tetracarboxylic dianhydride; 1,1-bis-[4-(1,2-dicarboxyphenyl)]-1-phenyl-2,2,2-trifluoroethane dianhydride; 2,2-hexafluoro-bis(3-aminophenyl)propane; 2,2-hexafluoro-bis(4-aminophenyl)propane; 2,2-hexafluoro-bis-[4-(3-aminophenoxy)phenyl]propane; 2,2-hexafluoro-bis-[4-(4-aminophenoxy)phenyl]propane and 1,1-bis-(4-aminopheny)-1-phenyl-2,2,2-trifluoroethane or mixtures thereof.

Abstract: In the process for the production of thin, biaxially stretched films from polypropylene, the latter is melted in an extruder and extruded from a slot die over the surface of a take-off roll. The plastic melt cooled on the surface of the take-off roll into an intermediate film is temperature-treated in the region of the take-off roll in a zone and the intermediate film is subsequently biaxially stretched and heat-set in a known way. At a take-off roll temperature T.sub.W of between 10.degree. C. and 100.degree. C., blowing air of a temperature T.sub.L greater than/equal to 30.degree. C. is blown onto the film surface on the air side not in contact with the circumferential surface of the take-off roll, the duration for this temperature treatment being at least 1.5 seconds.

Abstract: Color properties of crude phenolic esters of aromatic dicarboxylic acids are improved by subjecting the esters to hydrogenation in the presence of hydrogen and a hydrogenation catalyst.

Abstract: The present invention relates to novel, 1-substituted 3-aryl-7-chloro-3,4-dihydro-(2H)-acridone N-oxides, a process for their preparation, pharmaceutical compositions containing these compounds, and their use as chemotherapeutic agents, in particular as antimalarials and coccidiostatics.

Abstract: A process for the continuous production of C.sub.7 -Cl.sub.2 -acyloxybenzenesulfonic acids, wherein phenol and a sulfonating reagent, diluted with an aliphatic C.sub.7 -Cl.sub.2 -carboxylic acid, is charged to the top of a continuous-flow reactor heated to 80.degree.-100.degree. and the mixture of phenolsulfonic acid and the aliphatic carboxylic acid, leaving the bottom end of this continuous-flow reactor, and a chlorinating reagent are charged to the top of a second continuous-flow reactor, nitrogen being passed in counter-current through both continuous-flow reactors.

Abstract: Glycerides are reacted with ammonia in an amount of at least 200 liters per kilogram of glyceride per hour, at a temperature of 220.degree. to 300.degree. C., and in the presence of special catalysts. Of the product mixture which is formed and removed from the reaction with the excess ammonia, and which is composed essentially of the components water, the desired glycerol and fatty acid nitrile containing fatty acid and fatty acid amide, the latter component is returned to the reaction during the glyceride reaction. After completion of the glyceride reaction, which is indicated when the product mixture contains virtually no more glycerol, all the fatty acid nitrile containing fatty acid and fatty acid amide is further treated, in an after-reaction with a reduced amount of ammonia and at higher temperature, in order to convert the fatty acid and fatty acid amide impurities into fatty acid nitrile.

Abstract: A process for the preparation of insulin precursors of the formula (I) ##STR1## in which R is hydrogen or the presequence P.sub.m --Q.sub.n --, in which P is a sequence of naturally occurring amino acids with m being from 0 to 50, Q are basic natural amino acids, and n is an integer from 1 to 4, Y represents --Lys.sup.B29 --Z.sup.B30 --, in which Z denotes Ala, Thr or Ser, and the bridge extending from A-1 to A-21 is an insulin A-chain, the bridge extending from B-1 to B-30 represents an insulin B-chain, and X is a bridge which is bonded to the insulin A-chain at the amino group of A-1 and is bonded to the insulin B-chain at the .epsilon.-amino group of B-29-- in which case it is bonded to the free bond of Z.sup.