公开(公告)号：US3827974A

公开(公告)日：1974-08-06

申请号：US19038671

申请日：1971-10-18

申请人： LABOFINA SA

发明人： AGA R ,  CAHEN R ,  DEBUS H

IPC分类号： B01J23/40 ,  B01J23/42 ,  B01J37/02 ,  B01J37/03 ,  C10G45/52 ,  C10G23/02 ,  C10G23/04

CPC分类号： B01J23/40 ,  B01J23/42 ,  B01J37/02 ,  B01J37/03 ,  C10G2400/02

摘要： A CONTINUOUS PROCESS FOR THE PURIFICATION OF LIGHT PARAFFINIC FRACTION BOILING IN THE RANGE OF 25* TO 100*C. AND CONTAINING AS MAJOR PORTION STRAIGHT CHAIN PARAFFINS, BRANCHED PARAFFINS AND CYCLOPARAFFINS AND AS A MINOR PORTION AN IMPURITY SELECTED FROM THE GROUP CONSISTING OF AROMATIC HYDROCARBONS, SULPHUR-CONTAINING COMPOUNDS, NITROGEN-CONTAINING COMPOUNDS, AND OTHER NON--HYDROCARBON IMPURITIES, AND MIXTURES THEREOF, THE SULPHUR CONTENT BEING NO GREATER 500 P.P.M., SAID PROCESS COMPRISING: HYDROGENATION SAID LIGHT PARAFFINIC FRACTION AT A TEMPERATURE IN THE RANGE OF 150 TO 375*C., UNDER A PARTIAL PRESSURE OF HYDROGEN OF 10 TO 100 KG./CM.2, AT A S VELOCITY OF 0.5 TO 20 V./V./H. AND A HYDROGEN TO HYDROCARBON RATIO OF 100 TO 3,000 NM.3/M.3, IN THE PRESENCE OF A HYDROGENATING CATALYST CONTAINING BETWEEN 0.1 AND 2% OF PLATINUM ON A SILICA-ALUMINA CARRIER, SILICA BEING IN MAJOR QUANTITY, AND AT LEAST 30% OF THE PLATINUM BEING DISTRIBUTED ON THE CATALYST SURFACE WHICH IS ACCESSIBLE TO THE REACTANTS, FRACTIONATING THE PRODUCTS OF THE HYDROGENATION TO SEPARATE THE HYDROGENATED SULPHUR- AND NITROGEN-CONTAINING COMPOUNDS AND TO RECOVER A PARAFFINIC FRACTION SUBSTANTIALLY CONTAINING ONLY PARAFFINIC HYDROCARBONS WITH AN INCREASED CONTENT OF CYCLOPARAFFINS.

公开(公告)号：US3801629A

公开(公告)日：1974-04-02

申请号：US3801629D

申请日：1971-03-29

申请人： LABOFINA SA

发明人： AGA R ,  DEBUS H

IPC分类号： C07C51/44 ,  C07C51/493 ,  C07C67/08 ,  C07C67/06

CPC分类号： C07C51/493 ,  C07C51/44 ,  C07C67/08 ,  C07C53/08 ,  C07C69/06

摘要： A MIXTURE OF FORMIC ACID, WATER AND ACETIC ACID ARE SEPARATED BY CONTINUOUS DISTILLATION IN A COLUMN STILL BY ADDING THE FEED AT LEAST ABOVE THE TENTH THEORETICAL PLATE AND ADDING AN ESTERIFYING AGENT FOR THE FORMIC ACID CONSISTING OF AN ALCOHOL OR AN ESTER OF THE ALCOHOL IN WHICH THE ALCOHOL HAS AT LEAST THREE CARBON ATOMS AND PREFERABLY 3 TO 8 CARBON ATOMS, AND THE ACID OF THE ESTER BEING HIGHER BOILING THAN FORMIC ACID, THE ESTERIFYING AGENT BEING ADDED IN AN ESTERIFICATION ZONE DISPOSED AT LEAST ONE THEORECTICAL TRAY ABOVE THE FEED LEVEL WHEREBY CONCENTRATED ACETIC ACID ACCUMULATES AT THE BOTTOM OF THE COLUMN AND SUBSTANTIALLY ALL OF THE FORMIC ACID AND WATER PASS OVERHEAD AS THE FORMIC ESTER; THE ESTER CONTINUOUSLY FORMED OF THE FORMIC ACID SERVES AS A WATER ENTAINING AGENT AND PASSES OVERHEAD OF THE COLUMN WITH THE WATER.