公开(公告)号：US3711479A

公开(公告)日：1973-01-16

申请号：US3711479D

申请日：1971-04-01

Applicant: STAMICARBON

Inventor： VERSTEGEN J ,  VAN NASSAU P

IPC: C07C20060101 ,  C07D20060101 ,  C07D251/02 ,  C07D251/60 ,  C07D251/62 ,  C10J3/00 ,  C07D55/24

CPC classification number: C07D251/62

Abstract: A PROCESS FOR RECOVERING MELAMINE FROM HOT SYNTHESIS GASES CONTAINING MELAMINE, NH3 AND CO2 IS DISCLOSED WHEREIN THE HOT SYNTHESIS GASSES ARE CONTACTED WITH AN AQUEOUS SOLUTION OF AMMONIUM CARBAMATE. THE AMMONIUM CARBAMATE DECOMPOSES ENDOTHERMICALLY TO NH3 AND CO2 AND COOLS THE SYNTHESIS GASSES THEREBY DESUBLIMING MELAMINE THEREFROM.

D R A W I N G

公开(公告)号：US3709666A

公开(公告)日：1973-01-09

申请号：US3709666D

申请日：1969-10-20

Applicant: STAMICARBON

Inventor： WESTERVELD J ,  VAN DOORN J

IPC: C01C1/24 ,  B01D9/02

CPC classification number: C01C1/24

Abstract: A process for recovering ammonium sulfate from an aqueous solution containing ammonium sulfate and methionine by precipitating ammonium sulfate with a monovalent aliphatic alcohol.

Abstract translation: 从含有硫酸铵和甲硫氨酸的水溶液中通过用一价脂肪醇沉淀硫酸铵来回收硫酸铵的方法。

公开(公告)号：US3704226A

公开(公告)日：1972-11-28

申请号：US3704226D

申请日：1970-12-21

Applicant: STAMICARBON

Inventor： GEUS JOHN W

IPC: C01G49/02 ,  C04B35/26 ,  G11B5/706 ,  H01F1/34 ,  C04B35/28 ,  C04B35/32 ,  C04B35/36

CPC classification number: H01F1/344 ,  C01G49/02 ,  C01P2006/80 ,  C04B35/26 ,  G11B5/70678

Abstract: A PROCESS FOR THE PREPARATION OF PEMANENTLY MAGNETIZABLE IRON CONTAINING MIXED OXIDES BY PRECPITATION FROM AN AQUEOUS SOLUTION IS DISCLOSED. AN AQUEOUS SOLUTION OF A FERROUS SALT CONTAINING ALSO ONE OR MORE SALTS OF OTHER METALS, BUT NO OXIDIZING AGENTS, IS INTENSIVELY STIRRED, WHEREBY A PRECIPITATE IS GRADUALLY FORMNED AT ELEVATED TEMPERATURE BY HYDROLIZING UREA, LKIEWISE PRESENT IN THE SOLUTION, TO AMMONIUM CARBAMATE, OR AMMONIUM CARBONATE, AND THE PRECIPITATE SO FORMED IS SUBSEQUENTLY SEPARATED FROM THE LIQUID, WASHED, DRIED AND IF NECESSARY, HEAT-TREATED IN CONTACT WITH AIR. PREFERABLY THE PRECIPITATION IS CARRIED OUT IN AN INERT ATMOSPHERE. IF THE PRECIPITATE IS USED FOR THE PREPARATION OF A PERMANENTLY MAGNETIZABLE MIXED OXIDE TO BE USED ON TAPES OR SHEETS, THE MATERIAL IS SUBJECTED TO A TERMAL TREATMENT BELOW 500*C., AND FOR THE PREPARATION OF MOULDED OBJECTS, THE COMPRESSED MATERIAL IS SUBJECTED TO A THERMAL TREATMENT AT TEMPERATURES OF 1000*C. OR OVER.

公开(公告)号：US3703502A

公开(公告)日：1972-11-21

申请号：US3703502D

申请日：1970-08-21

Applicant: STAMICARBON

Inventor： VENDERBOS DIRK J ,  DIERENDONCK LAURENTIUS L VAN

IPC: B01D3/00 ,  B01J14/00 ,  B01J19/24 ,  C07D201/16 ,  C08C2/06 ,  C08F6/00 ,  C08F6/12 ,  C08F47/22 ,  C08F47/00

CPC classification number: B01J14/00 ,  B01J19/2405 ,  B01J19/2465 ,  B01J2219/00121 ,  B01J2219/00162 ,  C08C2/06 ,  C08F6/12

Abstract: THERE IS PROVIDED A PROCESS FOR ISOLATING ORGANIC COMPOUNDS, INCLUDING POLYMERS OR COPOLYMERS FROM AN ORGANIC SOLUTIN THEREOF. THE ORGANIC SOLUTION IS INTRODUCED INTO A VORTEX CHAMBER AT A POINT ADJACENT TO THE PERIPHERY OF THE CYLINDRICAL SIDE WALL OF THE VORTEX CHAMBER WHEREIN IT IS BROUGHT IN CONTACT WITH A VORTEX FLOW OF WATER OF A TEMPERATURE NEAR THE BOILING POINT OF THE SOLVENT UNDER THE PREVAILING PRESSURE. THE ORGANIC SOLUTION OF WHICH THE SPECIFIC GRAVITY HAS TO BE LOWER THAN THAT OF WATER IS DISPERSED IN THE WATER PHASE AT A POINT AWAY FROM THE INTERFACE BETWEEN THE LIQUID AND THE HOLLOW CORE IN THE VORTEX FLOW. TO INCREASE THE SPECIFIC GRAVITY, DISSOLVED SALTS OR SUSPENDED SUBSTANCES MAY BE ADDED TO THE WATER PHASE. THE ORGANIC SOLUTION MAY BE ADDED TO THE WATER IMMEDIATELY BEFORE IT ENTERS THE VORTEX FLOW OR MAY BE SUPPLIED THROUGH AN AXIALLY OR RADIALLY DISPOSED FEED PIPE TO THE WATER PHASE OF THE VORTEX FLOW.

公开(公告)号：US3687284A

公开(公告)日：1972-08-29

申请号：US3687284D

申请日：1970-10-27

Applicant: STAMICARBON

Inventor： LEEMAN JAN N J ,  DREISSEN HUBERT H

IPC: B01D35/00 ,  B03D1/02 ,  B03D1/08 ,  B03C1/30

CPC classification number: B03D1/08 ,  B01D35/005 ,  B03D1/02

Abstract: A method for reconditioning a diluted suspension of fine magnetizable particles for reuse in a specific gravity separation process wherein the diluted suspension is first separated from any particulate impurities, then diluted and fed to a cyclone densifier wherein the coarser magnetizable particles of the suspension are concentrated and the fine particles are separated and fed to a magnetic separator, the fine particles are then combined with the suspension of concentrated relatively coarser particles.

Abstract translation: 一种用于在比重分离方法中重新稀释可再利用的稀释悬浮液的方法，其中将稀释的悬浮液首先从任何颗粒杂质中分离出来，然后稀释并进料至旋风增稠器，其中悬浮液的较粗的可磁化颗粒被浓缩， 将细颗粒分离并加入到磁性分离器中，然后将细颗粒与浓缩的相对较粗颗粒的悬浮液组合。

公开(公告)号：US3658897A

公开(公告)日：1972-04-25

申请号：US3658897D

申请日：1969-03-28

Applicant: STAMICARBON

Inventor： SUVERKROPP GEERTRUDES H

IPC: D04B9/02 ,  C07C101/24

CPC classification number: D04B9/02

Abstract: THERE IS PROVIDED AN IMPROVEMENT IN THE KNOWN PROCESS OF OPTICAL RESOLUTION OF MIXTURES OF L- AND D-LYSINE BY REACTING THE LYSINE AND FORMING A SALT WITH ONE OF THE OPTICAL ANTIPODES OF A-PHENOXY PROPIONIC ACID. THE IMPROVEMENT COMPRISES USING OPTICALLY IMPURE A-PHENOXY PROPIONIC ACID HAVING OPTICAL PURITIES OF AS LOW AS 70%, INSTEAD OF THE MORE EXPENSIVE OPTICALLY PURE A-PHENOXY PROPIONIC ACID. THE RECOVERY LYSINE HAS AN OPTICAL PURITY GREATER THAN THE PURITY OF THE A-PHENOXY PROPIONIC ACID USED AND THE RECOVERED A-PHENOXY PROPIONIC ACID CAN HAVE A PURITY OF ESSENTIALLY 100%.

公开(公告)号：US3658889A

公开(公告)日：1972-04-25

申请号：US3658889D

申请日：1968-12-16

Applicant: STAMICARBON

Inventor： SUVERKROPP GEERTRUDES H

IPC: C07C227/36 ,  B01L7/02 ,  C07C59/68 ,  C07C59/70 ,  C07C229/26 ,  C07C101/24

CPC classification number: C07C59/68 ,  B01L7/02 ,  C07C59/70

Abstract: LYSINE IS OPTICALLY RESOLVED BY FORMING A SALT WITH PHENOXYACETIC ACID AND SELECTIVELY CRYSTALLIZING ONE OF THE ANTIPODES FROM A SUPERSATURATED SOLUTION THEREOF. THE SALT OF LYSINE AND PHENOXYACETIC ACID IS A NOVEL COMPOUND.

公开(公告)号：US3658765A

公开(公告)日：1972-04-25

申请号：US3658765D

申请日：1969-08-29

Applicant: STAMICARBON

Inventor： VEERMANS ANTONIE ,  KOCK ROBERT J DE

IPC: C08G69/14 ,  C08G69/18 ,  C08G20/18

CPC classification number: C08G69/18 ,  C08G69/14

Abstract: THE COMPOUND E,E''-BIS(E-CAPROLACTAM) IS DISCLOSED. E,E''-BIS-E-CAPROLACTAM) IS PREPARED BY ULTRAVIOLET RAY IRRADIATING E-CAPROLACTAM IN THE PRESENCE OF KETONE ACTIVATION AGENTS, E,E''-BIS(E-CAPROLACTAM) CAN BE HOMOPOLYMERIZED TO PRODUCE USEFUL POLAMIDES OR MAY BE COPOLYMERIZED WITH OTHER POLYAMIDE-FORMING SUBSTANCES, SUCH AS E-CAPROLACTAM, TO FORM USEFUL POLYAMIDE COPOLYMERS.

公开(公告)号：US3657210A

公开(公告)日：1972-04-18

申请号：US3657210D

申请日：1970-08-20

Applicant: STAMICARBON

Inventor： MINKHORST JAN H K

IPC: C08F2/00 ,  C08F10/00 ,  C08F3/04 ,  C08F1/60

CPC classification number: C08F10/00 ,  Y10S526/919 ,  C08F4/28

Abstract: A PROCESS FOR MIXING AN INITIATOR SOLUTION WITH ETHYLENE UNDER PRESSURE AS IT TRAVELS TO A HIGH PRESSURE POLYMERIZER, WHERE THE INTIATOR SOLUTION IS INTRODUCED INTO THE ETHYLENE STREAM AT DIFFERENT POINTS AND TRAVELING DIFFERENT DISTANCES FROM THE INITIATOR SOURCE THEREBY CONTROLLING THE HIGH-PRESSURE POLYMERIZATION OF ETHYLENE IS DISCLOSED.

公开(公告)号：US3655760A

公开(公告)日：1972-04-11

申请号：US3655760D

申请日：1969-11-12

Applicant: STAMICARBON

Inventor： ROOIJ ABRAHAM H DE ,  ELEMNDORP JAN

IPC: C01B21/02 ,  C01B21/14 ,  C01B21/26 ,  C07C131/00 ,  C01B21/40 ,  C01C1/28

CPC classification number: C01B21/1418 ,  C01B21/02 ,  C01B21/26

Abstract: A CYCLIC PROCESS FOR THE PREPARATION OF AN OZIME FROM A KETONE AND A HYDROXYLAMMONIUM SALT IS DISCLOSED IN WHICH AN AQUEOUS ACID REACTION MEDIUM IS CIRCULATED BETWEEN A HYDROXLAMMONIUM SALT SYNTHESIS ZONE WHEREIN NITRATE IONS ARE CATALYTICALLY REDUCED TO FORM A HYDROXYLAMMONIUM SALT IN THE AQUEOUS ACID REACTION MEDIUM, AND AN OXIME SYNTHESIS ZONE WHEREIN THE HYDROXYLAMMONIUM SALT IS REACTED WITH KETONE TO FORM AN OXIME. THE NITRATE IONS REDUCED IN THE HYDROXYLAMMONIUM SALT SYNTHESIS ZONE ARE REPLENISHED BY THE ABSORPTION OF NITROUS GASES IN THE AQUEOUS ACID REACTION MEDIUM RESULTING IN FORMATION OF NITRIC ACID.