公开(公告)号：US3658886A

公开(公告)日：1972-04-25

申请号：US3658886D

申请日：1969-02-11

Applicant: KNAPSACK AG

Inventor： SENNEWALD KURT ,  HAUSER ALFRED ,  GEHRMANN KLAUS ,  LORK WINFRIED

IPC: C07C51/25 ,  C07C51/44 ,  C07C51/48 ,  C07C57/07 ,  C07C67/08 ,  C07C69/54

CPC classification number: C07C51/48 ,  C07C51/252 ,  C07C51/44 ,  C07C67/08 ,  C07C67/54 ,  C07C67/56 ,  C07C57/04 ,  C07C69/54

Abstract: PRODUCTION OF ALIPHATIC ARYCLIC ACID ESTERS BY OXIDATION OF PROPYLENE AND/OR ACROLEIN WITH OXYGEN IN THE PRESENCE OF STEAM AND INERT GAS, AT A TEMPERATURE BETWEEN 300 AND 600*C., IN CONTACT WITH A CATALYST. HOT ACRYLIC ACID-CONTAINING REACTION GAS IS SCRUBBED WITH A HIGH BOILER MIXTURE, WHICH IS OBAINED AS A BY-PRODUCT DURING THE PROCESS AND SUBSTANTIALLY CONSISTS F MALEIC ACID ESTER, POLYACRYLIC ACIDS AND POLYACRYLIC ACID ESTERS, THE RESULTING ACRYLIC ACID-CONTAINING EXTRACTIS FREED B DISTILLATIVE TREATMENT FROM THE LOW BOILERS WATER, ACETIC ACID, ACROLEIN AND FORMALDEHYDE, AND REACTED LATER, IN THE PRESENCE OF ACID ION EXCHANGER RESINS, WITH AN ALIPHATIC ALCHOL HAVING FROM 1 TO 8 CARBONS ATOMS, THE RESLTING ARCYLIC ACID ESTER BEING DISTRILLED OFF AND THE HIGH BOILER MIXTURE BEING RECYCLED FOR SCRUBBING FUTHER ACRYLIC ACID-CONTAINING REACTION GAS.

公开(公告)号：US3555082A

公开(公告)日：1971-01-12

申请号：US3555082D

申请日：1967-11-15

Applicant: KNAPSACK AG

Inventor： SENNEWALD KURT ,  HAUSER ALFRED ,  LORK WINFRIED

IPC: C07C51/25 ,  C07C51/48 ,  C07C57/07 ,  C07C57/04

CPC classification number: C07C51/252 ,  C07C51/48 ,  C07C57/04

Abstract: PROCESS FOR ISOLATING ACRYLIC ACID FROM HOT REACTION GASES OBTAINED BY OXIDATION OF PROPYLENE TO ACROLEIN COMPRISING THE STEPS OF COOLING THE REACTION GAS DOWN TO A TEMPERATURE BETWEEN ABOUT 90 AND 200*C., EXTRACTING THEREAFTER THE GAS IN COUNTER-CURRENT FASHION WITH AN ESTER OF AN ALIPHATIC OR AROMATIC MONOCARBOXYLIC OR DICARBOXYLIC ACID OR WITH TRIBUTYL OR TRICRESYL PHOSPHATE, SUBJECTING RESULTING EXTRACT TO DISTILLATION TO REMOVE ACRYLIC ACID IN THE FORM OF A CONCENTRATED AQUEOUS SOLUTION, AND USING REMAINING DISTILLATION RESIDUE FOR THE EXTRACTION OF FURTHER ACRYLIC ACID-CONTAINING REACTION GAS.

公开(公告)号：US3657332A

公开(公告)日：1972-04-18

申请号：US3657332D

申请日：1969-10-24

Applicant: KNAPSACK AG

Inventor： SENNEWALD KURT ,  GEHRMANN KLAUS ,  HANDTE HEINZ ,  HAUSER ALFRED ,  KOHL GEORG

IPC: C07C51/48 ,  C07C57/07 ,  B01D3/36

CPC classification number: C07C51/48 ,  Y10S203/22 ,  C07C57/04

Abstract: PROCESS FOR ISOLATING PURE ACRYLIC ACID FROM AN AQUEOUS CRUDE ACID CONTAINING ACRYLIC ACID TOGETHER WITH SMALL PROPORTIONS OF ACETIC ACID, FORMALDEHYDE, ACROELIN, MALEIC ACID AND HIGHER CARBOXYLIC ACIDS AND POSSIBLY POLYMERIC ACRYLIC ACID, BY EXTRACTING THE CRUDE ACID USING AN ORGANIC SOLVENT, WATER-WASHING THE RESULTING ORGANIC EXTRACT, AND DISTILLING THE WASHED EXTRACT TO ISOLATE ACRYLIC ACID THEREFROM. THE AQUEOUS, ACRYLIC ACID-CONTAINING CRUDE ACID IS EXTRACTED USING 3,3,5-TRIMETHYLCYCLOHEXANONE AND/OR ISOPHORONE, THE RESULTING ORGANIC EXTRACT IS DEHYDRATED IN A

FIRST DISTILLING ZONE AND BASE PRODUCT COMING FROM THE FIRST DISTILLING ZONE IS DISTILLED IN A SECOND DISTILLING ZONE TO OBATIN PURE ACRYLIC ACID.

公开(公告)号：US3647867A

公开(公告)日：1972-03-07

申请号：US3647867D

申请日：1968-08-13

Applicant: KNAPSACK AG

Inventor： SENNEWALD KURT ,  HAUSER ALFRED ,  LORK WINFRIED

IPC: C07C51/25 ,  C07C57/04

CPC classification number: C07C51/252 ,  C07C57/04

Abstract: PRODUCTION OF ACRYLIC ACID COMPRISING REACTING PROPYLENE AND/OR ACROLEIN AND/OR A SUBSTANCE YIELDING ACROLEIN UNDER THE REACTION CONDITIONS, SUCH AS ALLYL ALCOHOL, IN THE GAS PHASE WITH OXYGEN AT TEMPERATURES BETWEEN 280 AND 600*C., UNDER PRESSURE BETWEEN 0.1 AND 10 ATMOSPHERES ABSOLUTE, AND FOR A PERIOD OF TIME BETWEEN 0.1 AND 20 SECONDS, IN THE PRESENCE OF STEAM AND IN CONTACT WITH A CATALYST CONSISTING OF THE OXIDES OF SILVER, IRON BISMUTH, MOLYBDENUM AND, IF DESIRED, PHOSPHORUS, WHICH ARE PRESENT IN THE ATOMIC RATIO OF

AG0.01-1.5FE0.1-12BI091-12P0-5MO12O20-110

THE CATALYST BEING DEPOSITED ON A CARRIER, IF DESIRED.

公开(公告)号：US3565826A

公开(公告)日：1971-02-23

申请号：US3565826D

申请日：1968-06-25

Applicant: KNAPSACK AG

Inventor： SENNEWALD KURT ,  HAUSER ALFRED ,  LORK WINFRIED

IPC: B01J23/89 ,  B01J27/192 ,  C07C51/25 ,  B01J11/82

CPC classification number: B01J27/192 ,  B01J23/8993 ,  C07C51/252 ,  C07C57/04

Abstract: CATALYST CONSISTING OF THE OXIDES OF IRON, BISMUTH, MOLYBDENUM AND OPTIONALLY PHOSPHORUS FOR USE IN THE CATALYTIC GAS-PHASE-OXIDATION OR PROPYLENE OR ACROLEIN BY MEANS OF OXYGEN INTO ACRYLIC ACID, THE CATALYST CONTAINING SILVER OXIDE AS AN ADDITIONAL COMPONENT IN THE ATOMIC RATIO OF AG0.01-1.5FE0.1-12P0.5MO12O30-110.