中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

26 records (took 0.02 seconds)

    Purification of adiponitrile
    2.
    发明授权
    Purification of adiponitrile 失效
    纯化的ADIPONITRILE

    公开(公告)号：US3657315A

    公开(公告)日：1972-04-18

    申请号：US3657315D

    申请日：1969-12-03

    Applicant: BASF AG

    Inventor： WEGERICH ANTON ,  AREND WOLFGANG ,  HIMMELHAN EMIL ,  WITTWER ARNOLD

    IPC: C07C121/26

    CPC classification number: C07C255/00

    Abstract: PURIFICATION OF ADIPONITRILE BY CRYSTALLIZATION FROM AN ALKANOL HAVING FROM FOUR TO EIGHT CARBON ATOM. THE PROCESS IS PARTICULARLY SUITABLE FOR THE PURIFICATION OF ADIPONITRILE CONTAINING CYANOCYCLOPENTANONIMINE. ADIPONITRILE IS AN INTERMEDIATE FOR THE PRODUCTION OF NYLON-6, A FIBER INTERMEDIATE.

    Recovery of epsilon-caprolactone and alkane dicarboxylic acid by acid treatment and vacuum distillation
    3.
    发明授权
    Recovery of epsilon-caprolactone and alkane dicarboxylic acid by acid treatment and vacuum distillation 失效
    通过酸处理和真空蒸馏回收EPSILON-CAPROLACTONE和ALKANE DICARBOXY ACID

    公开(公告)号：US3597330A

    公开(公告)日：1971-08-03

    申请号：US3597330D

    申请日：1968-04-24

    Applicant: BASF AG

    Inventor： WEGERICH ANTON ,  GROSSKINSKY OTTO-ALFRED ,  WINDERL SIEGFRIED ,  BLUM GERHARD

    IPC: C07C51/44 ,  C07C51/50 ,  C07D201/16 ,  B01D3/34

    CPC classification number: C07D201/16 ,  C07C51/44 ,  C07C51/50 ,  C07C55/14 ,  C07C55/12 ,  C07C55/10

    Abstract: THE RECOVERY OF EPSILON CAPROLACTONE AND OF ALKANE DICARBOXYLIC ACIDS FROM MIXTURES SUCH AS ARE OBTAINED IN THE INDIVIDUAL WASHING STEPS OF THE PROCESS FOR OXIDATION OF CYCLOHEXANE WITH AIR AT ELEVATED TEMPERATURE AND AT SUPERATMOSPHERIC PRESSURE AND CONTAINING SUBSTANTIALLY MONOCARBOXYLIC ACIDS, DICARBOXYLIC ACIDS AND EPSILON-HYDROXYCAPROIC ACID (IF DESIRED AFTER PART OF THE ADIPIC ACID PRESENT HAS BEEN SEPARATED) BY REMOVING WATER (IF PRESENT) AND THE MAJOR PORTION OF THE MONOCARBOXYLIC ACIDS (IF PRESENT) BY DISTILLATION, ADDING 1 TO 30% BY WEIGHT OF PHOSPHORIC ACID OR A COMPOUND FORMING THE SAME OR BORIC ACID, HEATING THE MIXTURE OBTAINED UNDER SUBATMOSPHERIC COMPONENTS, CONDENSING THE INDIVIDUAL FRACTIONS AND RECTIFYING AND/OR CRYSTALLIZING THE FRACTIONS. DISTILLATION TEMPERATURES ABOVE 150*C. ARE AVOIDED. EPSILON CAPROLACTONE IS USEFUL FOR THE PRODUCTION OF CAPROLACTAM, A STARTING MATERIAL FOR THE PRODUCTION OF FIBERS.

    4.
    发明专利
    未知

    公开(公告)号：FR1404936A

    公开(公告)日：1965-07-02

    申请号：FR985337

    申请日：1964-08-17

    Applicant: BASF AG

    Inventor： EISFELD KARL ,  HAUG PETER ,  SCHOLZ HEINRICH ,  WEGERICH ANTON

    IPC: C07C255/04 ,  B01D9/02 ,  C07C20060101 ,  C07C67/00 ,  C07C253/00

    Abstract: Adiponitrile is purified by cooling the liquid or heating the solid so as to produce a suspension of adiponitrile crystals in liquid adiponitrile at a temperature of below 2.0 DEG C., separating the crystals, e.g. on a filter press, vacuum filter, pressure filter or in a centrifuge, washing the crystals, e.g. with pure liquid adiponitrile or with water or an organic liquid, and returning the separated liquid adiponitrile, with or without the wash liquid, to the first or another crystallization zone. The wash liquid may be pure adiponitrile obtained by partly melting the separated solid adiponitrile, e.g. while still in the separation apparatus.

    Process for the production of pure cyclohexanone
    5.
    发明专利
    Process for the production of pure cyclohexanone 未知

    公开(公告)号：GB914425A

    公开(公告)日：1963-01-02

    申请号：GB4421960

    申请日：1960-12-23

    Applicant: BASF AG

    Inventor： POEHLER GUENTER ,  WEGERICH ANTON ,  GIEHNE HELLMUT ,  GOEHRE OTTO

    Abstract: Cyclohexanone is obtained from crude cyclohexanol by evaporating the bulk of the latter in a first vaporization zone at 140-180 DEG C., supplying the liquid residue to a second vaporization zone wherein it is vaporized as far as possible by a suitably correlated adjustment of temperature and pressure, returning the vapours from the second to the first zone (alternatively having condensed the vapours to liquid and returning this to the first zone), the vapours preheated to 250-400 DEG C. being then passed over a dehydrogenation catalyst at a velocity of 50-100 cm./sec., the residence period at the catalyst being 4-12 seconds. The catalyst is a heavy metal of Group Ib, IIb, VIa or VIII or an oxide or carbonate or mixtures thereof; copper supported on pumice or ferric oxide is specified.

    Purification of adipodinitrile
    6.
    发明专利
    Purification of adipodinitrile 未知

    公开(公告)号：GB1065725A

    公开(公告)日：1967-04-19

    申请号：GB3297364

    申请日：1964-08-13

    Applicant: BASF AG

    Inventor： EISFELD KARL ,  HAUG PETER ,  SCHOLZ HEINRICH ,  WEGERICH ANTON

    IPC: C07C255/04 ,  B01D9/02 ,  C07C20060101 ,  C07C67/00 ,  C07C253/00

    Abstract: Adiponitrile is purified by cooling the liquid or heating the solid so as to produce a suspension of adiponitrile crystals in liquid adiponitrile at a temperature of below 2.0 DEG C., separating the crystals, e.g. on a filter press, vacuum filter, pressure filter or in a centrifuge, washing the crystals, e.g. with pure liquid adiponitrile or with water or an organic liquid, and returning the separated liquid adiponitrile, with or without the wash liquid, to the first or another crystallization zone. The wash liquid may be pure adiponitrile obtained by partly melting the separated solid adiponitrile, e.g. while still in the separation apparatus.

    Separating succinic acid,glutaric acid and adipic acid from mixtures containing them
    7.
    发明专利
    Separating succinic acid,glutaric acid and adipic acid from mixtures containing them 未知

    公开(公告)号：GB1063054A

    公开(公告)日：1967-03-30

    申请号：GB2627164

    申请日：1964-06-25

    Applicant: BASF AG

    Inventor： WEGERICH ANTON ,  FUERST ERNST ,  HAARER ERICH ,  CORR HUBERT

    IPC: C07C51/44

    Abstract: A mixture of succinic, glutaric and adipic acids, such as obtained by the oxidation of cyclohexanol, cyclohexanone or cyclohexane is separated by fractional distillation under subatmospheric pressure in the presence of steam. The mixture is introduced from tank 1 into evaporator 2, which is heated to about 200 DEG C. and is maintained at an absolute pressure of 40 to 100 mm. Hg. The mixture then flows down column 4 into a still 5 at 195 DEG to 220 DEG C. into which superheated steam is injected through line 7. The steam laden with acid vapours is conducted from the head of the column into the evaporator, the vapours then passing through line 8 into a condenser 9 and being sprayed therein with an aqueous solution from a receiver 10. Crystals of succinic acid suspended in an aqueous solution are obtained by cooling in a vessel 14, are separated out in a centrifuge 15. The mother liquid is evaporated and the residue is returned to the crude product. The product received in vessel 6 from the still is substantially glutaric and adipic acids. Water is added to convert anhydrides into acids before preheating in 17 and passing the mixture into a column 18. The still 19 of the column is heated to 200 DEG C., a vacuum of 40-50 mm. Hg is maintained at the top of the column, and superheated steam is passed through line 20 into the still. The vapours leaving the head of the column are cooled in a condenser 21 and liquid glutaric acid so formed flows into a receiver 22 while steam with a small amount of succinic acid flows into a condenser 23. A mixture of adipic acid with a small amount of glutaric acid is withdrawn at 27 from the still from which adipic acid may be recovered by crystallization. The columns are provided with packings, baffles, spirals or bubble trays.

    Improvements in the separation of liquid mixtures into their components
    8.
    发明专利
    Improvements in the separation of liquid mixtures into their components 未知

    公开(公告)号：GB900457A

    公开(公告)日：1962-07-04

    申请号：GB4199358

    申请日：1958-12-30

    Applicant: BASF AG

    Inventor： POEHLER GUENTER ,  GIEHNE HELLMUT ,  WEGERICH ANTON ,  GOEHRE OTTO

    IPC: B01D1/06 ,  B01D3/14 ,  B01D3/32

    Abstract: A liquid mixture, which contains material of low volatility, is separated into fractions by introducing it through pipe 1 into distillation column 3 the base of which is connected, by pipes 7 and 9, to a tubular evaporator 8; the base of the column and/or the tubular evaporator being also connected to a film-evaporator 12. Non-volatile material is withdrawn from the film-evaporator via pipe 13; and the volatile fraction is removed from the head of the column via dephlegmator 6 and pipe 10. In the embodiment shown, the vapour withdrawn from the film-evaporator via pipe 14 is condensed; and the condensate is introduced via pipe 22 into the column with fresh feed. The film-evaporator may be maintained at low pressure by a vacuum pump connected to pipe 19. The level of the liquid in the base of the column is maintained constant by valve 15. The operation is preferably conducted so that the bottoms product contains 40 to 60% of the low-volatile material. The process is suitable for fractionating the crude products of organic syntheses; and the heat of reaction may be used to preheat in heat-exchanger 2 the feed to the column. There are five examples, which relate to the production of cyclohexanol, dicyclohexylamine, dichlorbutane, adiponitrile, and beta-naphthol.

Patent Agency Ranking