专利 - 详情

专利名称	Method of separating mixtures, containing xylene isomers and ALKILBENZOLY1Izobretenie relates to methods razlteleni ?.' mixtures, containing xylene isomers and alkilbeizoly , by selective extraction of complex of boron trifluoride and ftorigtogo hydrogen in the presence of a diluent. Known method of separating mixtures of aromatic hydrocarbons cg, soderzhandikh lh-xylene and other xylene isomers, consists in, process of extraction is carried out at the molar otnoshchenii boron trifluoride to fluoric hydrogen 0.02-0.12, molar otnoshchenii phlegm, and-xylene to mixture zagruzheinogo diluent and phlegm. "-xylene 0.3-! , molar ' m with respect to the whole cat-xylene, loaded in the extractor, to trekhftoristomu boron-(and) in 0.96-1.04 times bolshchem. value molar real estate situated pure l (-xylene to trekhftoristomu boron-in ftoristovodorodnom extract (Hg). Besides, part of extract is subjected to isomerization in mixture with solvent and is fed to the extraction stage, from the rest part of extract is separated hydrocarbon mixture, which is subjected to rectification with separation mksilola. However in the known method process of extraction is realized in return pas opoujenieziachitelpykh amounts of ekstragnruemy. x hydrocarbons (then, 3-1). This leads to necessary to carry out regeneration agrotourist- 202530tochnogo amount of of solvent, decreases nroizvoditelyyust extractor and increases energy consumption. For invention is to ieobkhodimost !! rzgenerirovanip of excessive amount of solvent and sokrap1 , er of energy consumption. For achieving this purpose the invention proposes a process of separating mixtures, containing isomers ksplola and alkylbenzenes, performed at molar ratio BFa /hf in fluorine-hydrogen extract 0.02-0.2, concentration of (T) aromatic hydrocarbons in hydrocarbon phase on stage of removing fluoride extract from ekCTipaKTOpa less than 0.3, the temperature of minus 20-plus 30 and flegmovo. m including less than 0.2. As initial raw material mainly is mixture of aromatic hydrocarbons, containing 6-9 carbon atoms, for example are isolated. "-Xylene from its mixture with o-xylene, n-xy. tolom and etilepbenzolom network isolation of mezitilepa from c ^ ieci its with aromatic hydrocarbons cg. Molar associate loading of hydrogen fluoride to mixture of aromatic hydrocarbons makes mainly 1.8-25, . mol5.* rnoe ratio of boron trifluoride to ekstragiruemomu product mainly 0.7-1.5, and molar ratio of
申请号	SU1284392	申请日
公开（公告）号	SU416934A3	公开（公告）日
申请（专利权）人	Inostrantsy josiro Ito Tamotsu Ueno Takasi Nakano Kazuo Okamoto; Inostranna firma Dzhapen Ges Kemikal Ko Ink	发明人
专利来源	国家知识产权局	转化方式
摘要	1, 238, 474. Extracting aromatic hydrocarbons. JAPAN GAS-CHEMICAL CO. Inc. 20 Nov., 1968 [21 Nov., 1967], No. 54956/68. Heading C5E. Aromatic hydrocarbons are separated from mixtures with other aromatic hydrocarbons by countercurrent extraction with HF/BF 3 in the presence of a diluent under conditions such that (1) the BF 3 /HF mole ratio of the withdrawn HF extract is 0à02-0à20, (2) the concentration γ of aromatic hydrocarbons in the hydrocarbon phase at the HF extract withdrawal section of the extractor has a value below 0à3, (3) γ and the mole ratio # m of the total hydrocarbon/BF 3 extract in the HF extract substantially satisfy a curve similar to the γ-# equilibrium diagrams provided, and (4) the reflux ratio of extract product is 0-0à2. A variety of diluents may be employed. The process is application to the separation of (a) m-xylene from a C 8 aromatic mixture, (b) mesitylene from a C 8 -C 9 aromatic mixture, and (c) an aromatic hydrocarbon boiling above the xylenes from an admixture thereof with xylenes; and is stated to be an improvement on Specification 1, 144, 067. 1人已参与 0数据匹配