摘要:
In order to stabilize 1,1-dichloro-1-fluoroethane containing traces of vinylidene chloride, at least one ethylenic hydrocarbon containing at least 4 carbon atoms is added thereto.
摘要:
Perfluoroalkyl amine oxides of the following formula: ##STR1## where C.sub.n F.sub.2n+1 is a straight or branched perfluorinated chain, n is a whole number from 1 to 20, a is a whole number from 2 to 10, p is a whole number from 0 to 10, R.sub.1 is either a hydrogen atom or an alkyl radical having 1 to 6 carbon atoms, and R.sub.2 and R.sub.3 are alkyl radicals having 1 to 6 carbon atoms, and the use of the amine oxides as surface active agents particularly in fire extinguishing compositions.
摘要翻译:下式的全氟烷基氧化胺:其中C n F 2n + 1为直链或支链全氟链,n为1〜20的整数,a为2〜10的整数,p为整数 0至10的数,R1是氢原子或具有1至6个碳原子的烷基,R2和R3是具有1至6个碳原子的烷基,以及使用氧化胺作为表面活性剂,特别是在 灭火组合物。
摘要:
A fluorinated sulphobetaine compound of the general formula ##STR1## wherein R.sub.F represents a straight-chained or branched perfluorinated aliphatic chain C.sub.n F.sub.2n+1 (n being an integer between 1 and 20), a is an integer between 0 and 10, X is CO or SO.sub.2, p is an integer between 0 and 10, R.sub.1 is a hydrogen atom or an alkyl group containing 1 to 6 carbon atoms, R.sub.2 and R.sub.3 are each alkyl radicals containing 1 to 6 carbon atoms, and Z is a bivalent organic group; and fire extinguishing compositions comprising such fluorinated sulphobetaine compounds.
摘要翻译:一种通式为“IMAGE”的氟化磺基甜菜碱化合物,其中RF表示直链或支链全氟化脂族链CnF2n + 1(n为1至20之间的整数),a为0至10之间的整数,X为CO或 SO 2,p为0〜10的整数,R 1为氢原子或碳原子数为1〜6的烷基,R 2和R 3为碳原子数为1〜6的烷基,Z为二价有机基团。 以及包含这种氟化磺基甜菜碱化合物的灭火组合物。
摘要:
To remove the olefinic impurities from a hydrochlorofluoroethane of formula: CF.sub.3 --CHClX (X=H, F, or Cl), it is subjected to a photochlorination stage.
摘要:
1,1,1,3,3-Pentachlorobutane, whose fluorination leads to 1,1,1,3,3-pentafluorobutane, is prepared with high yield and selectivity by addition of carbon tetrachloride to 2-chloropropene in the presence of a copper salt and an amine.
摘要:
To remove the traces of chlorotrifluoroethylene (F1113) which are present in a pentafluoroethane (F125), the F125 is passed through a bed of active carbon.
摘要:
The invention relates to a continuous process for the preparation of perfluoroalkyl iodides by thermal telomerization, in the gas phase, of tetrafluoroethylene with pentafluoroethyl iodide or heptafluoroisopropyl iodide in a tubular reactor.To improve the selectivity for a telomer of the desired extent, the telomers of lesser extent are recycled to at least one point in the reactor, which is situated between one-twentieth and three-quarters the length of the tube.
摘要:
This invention relates to carboxylated polyfluoroamine compounds of the general formula ##STR1## wherein the radical C.sub.n F.sub.2n.sub.+1 -- is a straight or branched perfluorinated chain, n is an integer from 1 to 20, a is an integer from 2 to 10, p is an integer from 1 to 10, R.sup.2 and R.sup.3 each is an alkyl radical containing from 1 to 6 carbon atoms and R.sup.1 is a hydrogen atom or an alkyl radical containing from 1 to 6 carbon atoms and the process for their preparation.
摘要:
Process for drying wet F32, which comprises placing a stream of the said F32 in continuous contact with a feed stock of a composition comprising a molecular sieve chosen from a 3A type sieve, at a temperature of between 5 and 78° C. and at a pressure of between 0.5 and 25 atm.
摘要:
Process for drying wet F32, which comprises placing a stream of the said F32 in continuous contact with a feed stock of a composition comprising a molecular sieve chosen from a 3A type sieve, at a temperature of between 5 and 78° C. and at a pressure of between 0.5 and 25 atm.