Showing papers on "Methyl isobutyl ketone published in 1972"

Bis-dicyclohexylamine n-carbisobutoxycephalosporin c

Abstract: AFTER THE REACTION AT THE FREE AMINO GROUP OF CEPHALOSSPORIN C IN A FERMENETATION BEER WITH ISOBUTYL CHOL ATE FOLLOWED BY EXTRACTION INTO METHYL ISOBUTYL KETONE AT PH 2, THE PRODUCT IS RECOERED IN HIGH YIELD AS A SUBSTANTIALLY PURE CYRSTALLINE BIS-AMINE SALT BY THE ADDITION OF TWO MOLES OF DICYCLOHEXYLAMINE.

Process for the production of methyl isobutyl ketone

Abstract: 1280368 Hydrogenation catalysts SHOWA DENKO KK 8 Oct 1969 49540/69 Heading B1E [Also in Divisions C2 and C3] A catalyst for the production of methyl isobutyl ketone by the hydrogenation of liquid acetone is prepared by impregnating a sulphonic acid cation exchange resin of macroreticular structure with a solution of a palladium salt and then reducing the latter to particles of the metal using hydrazine, hydrazine hydrate, or a salt of hydrazine.

Substrates coated with pressure sensitive adhesives

Abstract: 1298325 Adhesive tapes and labels AVERY PRODUCTS CORP 12 Feb 1970 [17 Feb 1969 (2)] 6884/70 Heading B5N [Also in Divi sions B2 and C3] A pressure-sensitive adhesive coating is formed on a substrate by forming at below 200‹ F a dispersion of a polyvinyl halide resin containing at least 85% vinyl halide in a plasticizer at a weight ratio, resin to plasticizer, of 1 : 1 to 1 : 5 wherein the plasticizer is a linear, saturated polyester formed from a C 2 -C 10 polyhydric alcohol having 2-4 hydroxy groups and a C 6 -C 10 dibasic aliphatic acid and having a molecular weight of 800-15,000, applying the dispersion at below 200‹ F, optionally dissolved in a solvent or with a diluent, to provide a dry thickness of 0A5-5 mils and heating the film, optionally if a solvent has been used, to 100- 350‹ F to solvate the resin with the plasticizer In specific examples, labels are formed; when a resin-plasticizer dispersion is used this is applied to a backing sheet coated with a release coating, the label face stack applied and the laminated heated; using a solution in a solvent this is applied to the label face stack and then laminated with a silicone-coated backing sheet and dried Resins used in the examples are PVC, vinyl chloride/vinyl acetate copolymers and vinyl chloride/vinyl acetate/maleic anhydride copolyrners and mixtures thereof, and the polyesters are adipic acid/2,2-dimethyl-1,3- propane diol or azelaic acid/1,3-butylene glycol or hexamethyleneglycol polyesters Diluents and solvents used are xylene, toluene, cyclohexane, hexane, methyl ethyl ketone, methyl isobutyl ketone, and ethyl acetate and their mixtures Also present may be tin, cadmium, barium ricinoleate as stabilizer, carbon black, silica and titanium dioxide pigments, phthalate ester of hydroabietyl alcohol as tackifier and epoxidized soyabean acid methyl ester as further plasticizer

Spectrophotometric determination of traces of ethylene glycol in water

Abstract: A convenient method is proposed for the determination of ethylene glycol in aqueous solutions by oxidation to oxalic acid The oxalic acid is treated with excess iron solution and the mixture with a known amount of standard thiocyanate solution The oxalic acid decreases the colour intensity of the iron thiocyanate complex and from this decrease the concentration of original ethylene glycol can be found Beer's law is obeyed within the range of 06 to 3 ppm of eventual dilution Errors are about _+ 1 ~ Propylene glycol intereferes seriously in the estimation of ethylene glycol Working Direction Add 15 ml of conc HNO 3 to 2 ml of the sample solution, heat for 30 rain on an oil bath of 130~ adjust the pH to 23 and take 3 ml of the solution into a separating funnel (after preceding appropriate dilution) Add 2 ml of ferric sulphate solution (20 ppm) and 5 ml of 05 N potassium thiocyanate solution and make up the volume to 25 ml Extract with 10 ml of methyl isobutyl ketone and measure the absorbance against a reagent blank at 495 nm Prepare a calibration curve accordingly by using varying quantities of ethylene glycol

Improved process for the preparation of aldehydes and ketones and catalysts used therein

Abstract: 1,269,167. Aldehydes and ketones. SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N.V. 9 June, 1970 [11 June, 1969], No. 27864/70. Heading C2C. Aldehydes and ketones are prepared from (a) a primary or secondary alcohol, respectively, by catalytic dehydrogenation, possibly in combination with one or more condensation reactions, and/or from (b) an aldehyde or ketone, respectively, having a smaller number of carbon atoms than those to be prepared, by one or more condensation reactions involving the use of hydrogen, by a process in which the primary or secondary alcohol and/or the aldehyde or ketone is (are) contacted at a temperature of at least 200‹ C. and, if necessary or desired, together with hydrogen, with a catalyst comprising Cu, Ru, Rh, Pd, Os, Ir or Pt, which has been applied on a porous, non-acidic, oxidic carrier having an average pore diameter of at least 150 S and a specific surface area of at least 5 m. 2 /g. Suitable carriers include oxides of Si or Al and mixed oxides of these elements. A basic component, e.g. an alkali metal compound may be included. Other metals such as Cr, Zn or Ti may also be present. In examples: isopropanol containing H 2 O is converted to acetone and methyl isobutyl ketone; secondary butanol is converted to methyl ethyl ketone and C 8 ketones and alcohols; acetone containing isopropanol is converted to methyl isobutyl ketone, mesityl oxide and C 9 compounds.