中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

141 records (took 0.012 seconds)

    Process for the separation of isoprene
    3.
    发明授权
    Process for the separation of isoprene 失效
    分离异丙酚的方法

    公开(公告)号：US3851010A

    公开(公告)日：1974-11-26

    申请号：US32723873

    申请日：1973-01-26

    Applicant: SNAM PROGETTI

    Inventor： RESCALLI C ,  GINNASI A ,  REBORA P

    IPC: B01D3/14 ,  C07C1/00 ,  C07C7/00 ,  C07C7/08 ,  C07C11/18 ,  C07C67/00

    CPC classification number: C07C7/005 ,  C07C7/08 ,  C07C11/18

    Abstract: D R A W I N G
    1. PROCESS RECOVEING ISOPRENE OF POLYMERIZATION GRADE FROM A MIXTURE OF C4 AND C5 HYDROCARBON INCUDING ISOPRENE, COMPRISED OF THE FOLLOWING STEPS; (A) RATIFICATION WHEREIN C4 HYDROCARBONS, LOW BOILING ACETYLENIC COMPOUNDS, 70% TO 90% OF ISOPENTANE ARE WITHDRAWN AS OVERHEAD, AND DIMERIZATION AND POLYMERIZATION PRODUCTS 30% TO 60% OF THE HIGH BOILING HYDROCARBON PRESENT IN THE FEED ARE WITHDRAWN AS BOTTOM PRODUCT, AND THE STREAM CONTAINING ISOPRENE IS WITHDRAWN IN VAPOR PHASE FROM A PLATE OF THE EXHAUST SECTION OF A RECTIFIER; (B) A FIRST EXTRACTIVE DISTILLATION, UTILIZING REFLUX AND SOLVENT, SELECTED FROM THE GROUP CONSISTING OF NFORMYLMORPHOLINE, MORPHOLINE AND MIXTURES OF SAID COMPOUNDS WITH EACH OTHER AND WITH WATER, OBTAINED BY SUBJECTING TO FLASH EVAPORATION THE BOTTOM STREAM OF A SECOND EXTRACTIVE DISTILLATION STEP, WHEREIN MONOCYCLOPENTADIENE, HIGH BOILING ACETYLENIC COMPOUNDS AND 40% TO 70% OF PENTADIENES PRESENTS IN SAID STREAM ARE WITHDRAWN AS BOTTOM PRODUCT AND A STREAM CONTAINING RAW ISOPRENE IS WITHDRAWN AS OVERHEAD WITH OLEFINES, CYCLOPENTENE, AND C5 SATURATED HYDROCARBONS; (C) STRIPPING THE BOTTOM STREAM OF THE FIRST EXTRACTIVE DISTILLATION STEP BY SEPARATING THE SOLVENT FROM MOMOCYCLOPENTADIENE AND OTHER HYDROCARBONS, WHEREIN THE SOLVENT IS RECOVERED AS BOTTOM PRODUCT AND MONOCYCLOPENTADIENE AND OTHER HYDROCARBONS SOLUBLE IN THE SOLVENT ARE DISCHARGED AS OVERHEAD; (D) RECTIFICATION OF THE OVERHEAD HYDROCARBON STREAM FROM THE STRIPPING STEP (C) WHEREIN MONOCYCLOPENTADIENE, THE HIGH BOILING ACETYLENIC COMPOUNDS AND 40% TO 70% BASED ON THE FEEDSTOCK OF THE DIENE COMPOUNDS ARE WITHDRAWN AS BOTTOM PRODUCT AND ISOPRENE CONTAINED IN THE STREAM COMING FROM STRIPPING STEP (C) IS DISCHARGED AS OVERHEAD PRODUCT AND SENT TO THE RECTIFICATION COLUMN OF STEP (A); (E) SECOND EXTRACTIVE DISTILLATION OF THE RAW ISOPRENE STREAM OBTAIN FROM THE FRIST EXTRACTIVE DISTILLATION STEP (B) WHEREIN SAID STREAM IS FED IN VAPOR PHASE AND THE C5 SATURATED AND OLEFINIC COMPOUNDS ARE WITHDRAWN AS OVERHEAD, THE SOLVENT NECESSARY THEREFOR BEING WITHDRAWN FROM THE BOTTOM OF THE STRIPPING COLUMN OF STEP (C); (F) FLASH EVAPORATION OF THE STREAMS DISCHARGED AS BOTTOM PRODUCT IN THE EXTRACTIVE DISTILLATION STEP (E), THE LIQUID PHASE BEING RECYCLED TO THE TOP OF THE FIRST EXTRACTIVE COLUMN FOR SUPPLYING SAID COLUMN BOTH WITH THE EXTRACTIVE SOLVENT AND THE HYDROCARBON STREAM NECESSARY FOR THE REFLUX, THE VAPOR PHASE CONSTITUTED BY ISOPRENE ESSENTIALLY IMPURE FOR CYCLOPENTENE AND CYCLOPENTANE BEING SENT TO A FURTHER RECTIFICATION STEP; (G) RECTIFICATION ELMINATING AS BOTTOM PRODUCT THE STILL PRESENT HEAVY COMPOUNDS, CYCLOPENTENE, CYCLOPENTANE AND THE REMAINING PENTADIENES WITHDRAWING AS OVERHEAD A STREAM OF ISOPRENE CONTAINING TACES OF LOW BOILING COMPOUNDS, WHICH STREAM IS RECYCLED TO THE RECTIFICATION COLUMN OF STEP (A) WITHDRAWING IN LIQUID PHASE FROM A PLATE OF THE UPPER SECTION OF THE RECTIFICATION COLUMN POLYMERIZATION GRADE ISOPRENE.

    Process for the production of polymers and copolymers of isobutylene of high molecular weight
    5.
    发明授权
    Process for the production of polymers and copolymers of isobutylene of high molecular weight 失效
    生产高分子量异丁烯的聚合物和共聚物的方法

    公开(公告)号：US3850895A

    公开(公告)日：1974-11-26

    申请号：US30690172

    申请日：1972-11-15

    Applicant: SNAM PROGETTI

    Inventor： PRIOLA A ,  CESCA S ,  FERRARIS G

    IPC: C08F4/00 ,  C08F2/04 ,  C08F4/42 ,  C08F10/10 ,  C08F210/12 ,  C08D1/26 ,  C08D3/02 ,  C08D3/10

    CPC classification number: C08F10/10 ,  C08F4/52

    Abstract: Y-Z(-(Y'')N)(-(R'')H)-X

    WEHEREIN X IS AN ATOM OF HAOLGEN, Z IS NITROGEN, CARBON OR PHOSPHOROUS; R'' IS HYDROGEN RADICAL WITH FROM 1 TO 10 CARBON ATOMS, OR HYDROGEN, OR IS EQUAL TO X; Y IS A MEMBER OF THE GROUP CONSISTING OF

    -SO2-R", -CO-R", -COO-R", -P(=O)(-R")2,

    (R")2-N-C(=N-R")-, -C(=S)-R", -C(=S)-O-R", -C(-R")2-NO2

    -C(-R")2-CN, -N=C=O, =C(-R")-NO2, -C(-R")=N, =C(-CL)-R"

    1. PROCESS FOR THE PRODUCTION OF BUTYL RUBBER THROUGH THE COPOLYMERIZATION OF ISOBUTYLENE AND ISOPRENE WHEREIN THE IMPROVEMENT COMPRISES CONDUCTING THE COPOLYMERIZATION REACTION IN THE PRESENCE OF A CATALYTIC SYSTEM CONSISTING ESSENTIALLY OF: (A) A METALORGANIC COMPOUND OF ALUMINUM HAVING THE FORMULA AIR3 OR AIR2X WHERE X IS A HALOGEN ATOM AND R IS A HYDROCARBON RADICAL WITH FROM 1 TO 10 CARBON ATOMS, OR HYDROGEN; AND (B) A COMPOUND CONTAINING A MOBILE HALOGEN GROUP OR AT LEAST ONE IN WHICH THE HALOGEN GROUP IS EASILY EXCHANGEABLE DUE TO THE PRESENCE OF AN ELECTROPHILIC GROUP REPRESENED BY THE FORMULA
    Y'' IS EQUAL TO Y, OR TO R''; Y OR Y'' MAY BE A BIVALENT RADICAL LINKED THROUGH A DOUBLE BON DIRECTLY TO Z; Y AND Y'' MAY BE CONNECTED TO EACH OTHER CLOSING THEMSELVES CYCLICALLY ON Z; R'''' IS AN ALKYLIC OR ARYLIC RADICAL, SIMPLE OR SUBSTITUTED; N AND H ARE 0 OR 1.

    Process for the production of a reducing gas for blast furnace
    10.
    发明授权
    Process for the production of a reducing gas for blast furnace 失效
    用于生产用于吹制炉的还原气体的方法

    公开(公告)号：US3813229A

    公开(公告)日：1974-05-28

    申请号：US17763071

    申请日：1971-09-03

    Applicant: SNAM PROGETTI

    Inventor： PAGANI G

    IPC: C21B5/00 ,  C01B2/14

    CPC classification number: C21B5/001 ,  Y02P10/143

    Abstract: THIS INVENTION RELATES TO A PROCESS FOR THE PRODUCTION OF A REDUCING GAS FOR USE IN A BLAST FURNACE SAID PROCESS COMPRISING SEPARATELY PREHEATING A HYDROGEN FUEL AND SEPARATELY PREHEATING THE SUPPORTOR OF COMBUSTION TO BE USED IN THE PARTIAL COMBUSTION FURNACE WHERE THE REDUCING GAS IS PRODUCED TO A TEMPERATURE IN THE RANGE OF 800*-1500* C; FEEDING THE PREHEATED SUPPORTER OF COMBUSTION TO THE PARTIAL COMBUSTION FURNACE TOGETHER WITH THE FUEL WHICH HAS BEEN PREHEATED TO AT LEAST 600* C, COOLING IF NECESSARY THE OBTAINED GASES TO A TEMPRATURE SUITABLE FOR INTRODUCTION INTO THE BLAST FURNACE AND; FEEDING THE GASES TO THE BLAST FURNACE.

Patent Agency Ranking