摘要:
A Process for preparing ketene in the presence of a fluidized bed material with a surface area of up to about 600 m2/g. The process is further defined as a process for preparing ketene from a sugar or glycolaldehyde feedstock.
摘要:
Oligomers of tetrafluoroethylene (C2F4)n where n is 4 to 6 react at 25*-100*C with aqueous solutions of sodium or potassium hydroxides to give novel oxygen-containing derivatives in which the oxygen is located in hydroxyl, carbonyl or carboxyl groups. With 5-15% by weight solutions of the hydroxides the tetramer yields a tertiary alcohol; the pentamer yields the ketone (C2F5)2(CF3)C.CH2COCF3, and hexamer yields a mixture of the ketone (C4F9)(C2F5)(CF3)C.CH2COCF3 and the ketene (C2F5)2(CF3)C.C(CO).CF(CF3)(C2F5). With 30-60% solutions the pentamer yields the acid (C2F5)2(CF3)C.CH2COOH. These oligomer derivatives are intermediates for making surfactants and oleophobic compounds for application to textiles and leather.
摘要翻译:其中n为4-6的四氟乙烯(C 2 F 4)n的低聚物与氢氧化钠或氢氧化钾水溶液在25℃下反应,得到新的含氧衍生物,其中氧位于羟基,羰基或羧基中。 使用5-15重量%的氢氧化物溶液,四聚体产生叔醇; 五聚体产生酮(C2F5)2(CF3)C.CH2COCF3,六聚体产生酮(C4F9)(C2F5)(CF3)C.CH2COCF3和烯酮(C2F5)2(CF3)CC(CO) CF(CF 3)(C 2 F 5)。 用30-60%的溶液,五聚体产生酸(C 2 F 5)2(CF 3)C .CH 2 COOH。 这些低聚物衍生物是用于制造用于纺织品和皮革的表面活性剂和疏油性化合物的中间体。
摘要:
2-(TRIFLUOROMETHYL)PERFLUOROPENTENE-2 REACTS WITH AN ALKALI METAL LOWER ALKOXIDE TO GIVE CIS- AND TRANS-ALKYL-2(TRIFLUOROMETHYL)-1,1,4,4,5,5,5-HEPTAFLUORO-3-ALKOXYPENT2-ENYL ETHER WHICH IS THEN REACTED WITH SULFUR TRIOXIDE TO GIVE PERFLUOROOMETHYL PROPIONYLKETENE. ON CONTACTING PERFLUOROMETHYLPROPIONYLKETENE WITH AN ALKALI METAL FLUORIDE IN A POLAR SOLVENT BETWEEN ROOM TEMPERATURE AND 150*C., THREE PRODUCTS ARE OBTAINED, THE PROPORTIONS VARYING WITH THE CONDITONS. WITH A CATALYTIC AMOUNT OF ALKALI METAL FLUORIDE OR SILVER OXIDE THE PRODUCT IS MAINLY A DIMER BELOW 60*C. ABOVE 60*C. A PYRANOPYRAN-2,5-DIONE IS FORMED. IF AN EQUI-MOLAR AMOUNT OF ALKALI METAL FLUORIDE IS EMPLOYED THE PRODUCT IS A METAL DERIVATIVE OF PYRAN-4ONE. PERFLUOROMETHYLPROPIONYLKETENE AND THE ABOVE DERIVATIVES ARE ALL USEFUL AS WATERPROOFING AGENTS FOR TEXTILES AND PAPER. ALSO DISCLOSED IS A METHOD OF SEPARATING PERFLUOROMETHYLPROPIONYLKETENE FROM BY-PRODUCT ALKYL SULFONATES BY CONTACTING THE MIXED VAPORS WITH AN ALKALI METAL FLUORIDE AT 250*C. TO 700*C.
摘要:
OLIGOMERS OF TETRAFLUOROETHYLENE (C2F4)N WHERE N IS 4 TO 6 REACT AT 25*-100*C. WITH AQUEOUS SOLUTIONS OF SODIUM OR POTASSIUM HYDROXIDES TO GIVE NOVEL OXYGEN-CONTAINING DERIVATIVES IN WHICH THE OXYGEN IS LOCATED IN HYDROXYL, CARBONYL OR CARBONYL GROUPS. WITH 5-15% BY WEIGHT SOLUTIONS OF THE HYDROXIDES THE TETRAMER YIELDS A TERTIARY ALCOHOL; THE PENTAMER YIELDS THE KETONE
(C2F6)2CF3)C.CH2COCF3
AND HEXAMER YIELDS A MIXTURE OF THE KETONE
(C4F9)C2F5)(CF3)C.CH2COCF3
AND THE KETONE (C2F5)2(CF3)C.C(CO).CF(CF3)(C2F5); WITH 30-60% SOLUTIONS THE PENTAMER YIELDS THE ACID (C2F5)2(CF3)C.CH2COOH. THESE OLIGOME DERIVATIVES ARE INTERMEDIATES FOR MAKING SURFACTANTS AND OLEOPHOBIC COMPOUNDS FOR APPLICATION TO TEXTILES AND LEATHER.
摘要:
A Process for preparing ketene in the presence of a fluidized bed material with a surface area of up to about 600 m2/g. The process is further defined as a process for preparing ketene from a sugar or glycolaldehyde feedstock.
摘要:
A method of reacting one or more components in a liquid phase to form an organic product, the method including feeding a carbon-based gas to a high shear device; feeding a hydrogen-based liquid medium to the high shear device; using the high shear device to form a dispersion comprising the carbon-based gas and the hydrogen-based liquid medium, wherein the dispersion comprises gas bubbles with a mean diameter of less than about 5 μm; introducing the dispersion into a reactor; and reacting the dispersion to produce the organic product.
摘要:
Fluorinated carbonyl compounds are prepared by contacting a fluorinated methyl or ethyl ether containing at least one methoxylated carbon atom-containing group selected from: --CF.sub.2 OR.sup.3, .dbd.CFOR.sup.3, ##STR1## wherein R.sup.3 is CH.sub.3 or C.sub.2 H.sub.5, with a catalyst selected from:SbX.sub.5, TaX.sub.5, NbX.sub.5, AsX.sub.5, BiX.sub.5, TiX.sub.4, ZrX.sub.4, HfX.sub.4, FeX.sub.3,mixtures of SbX.sub.3 and SbX.sub.5, ZM'X'.sub.6, and mixtures of ZM'X'.sub.6 and M'X.sub.5 where X, independently, is F, Cl, Br or I, X' is F or Cl; and Z is H, NO, O.sub.2, alkali metal or NY.sub.4 where Y, independently, is H or alkyl of 1 to 6 carbon atoms, and M' is Sb or As at a temperature of -20.degree. to 200.degree. C.
摘要翻译:氟化羰基化合物通过使含有至少一个选自以下的含有甲氧基化碳原子的基团的氟化甲基或乙醚与选自以下的催化剂接触:其中R 3为CH 3或C 2 H 5,其中R 3为CH 3或C 2 H 5, TaX5,NbX5,AsX5,BiX5,TiX4,ZrX4,HfX4,FeX3,SbX3和SbX5的混合物,ZM'X'6以及ZM'X'6和M'X5的混合物,其中X独立地为F,Cl, Br或I,X'是F或Cl; Z为H,NO,O 2,碱金属或NY 4,其中Y独立地为H或1至6个碳原子的烷基,M'为Sb或As,温度为-20至200℃。
摘要:
2-Substituted isoxazolidine-3,5-diones and isoxazolidine-3-one-5-thiones exhibit herbicidal activity, controlling effectively the growth of a wide spectrum of grassy and broad-leaved plant species. The preparation and herbicidal activity of the compounds is exemplified.