中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

65 records (took 0.078 seconds)

    PROCESS FOR THE PREPARATION OF DYESTUFFS CONTAINING THIOPHENE RADICALS
    42.
    发明专利
    PROCESS FOR THE PREPARATION OF DYESTUFFS CONTAINING THIOPHENE RADICALS 未知

    公开(公告)号：PT82579A

    公开(公告)日：1986-06-01

    申请号：PT8257986

    申请日：1986-05-13

    Applicant: BASF AG

    Inventor： HANSEN GUENTER ,  SCHEFCZIK ERNST ,  ETZBACH KARL-HEINZ ,  REICHELT HELMUT ,  LOEFFLER HERMANN

    IPC: C09B29/00 ,  C09B29/033 ,  D06P1/18 ,  C09B49/00

    Abstract: The compounds of the general formula I where X is fluorine, chlorine, bromine, SO2E or unsubstituted or substituted hydroxyl or mercapto, E is alkyl, alkenyl, cycloalkyl, aralkyl, aryl, chlorine or unsubstituted or substituted hydroxyl or amino, Y is cyano, nitro, alkanoyl, aroyl, alkylsulfonyl, arylsulfonyl, carboxyl, a carboxylic ester group or unsubstituted or substituted carbamyl, T is hydrogen, C1-C4-alkyl, a radical which can be introduced by electrophilic substitution or a radical of the formula -CH=B, in which B is a radical of a methylene-active compound or of an amine, and K is a radical of a coupling component, are very useful for dyeing synthetic fibers or plastics.

    Separation of crystals from solutions
    48.
    发明专利
    Separation of crystals from solutions 未知

    公开(公告)号：GB994379A

    公开(公告)日：1965-06-10

    申请号：GB1327262

    申请日：1962-04-06

    Applicant: BASF AG

    Inventor： HANSEN GUENTER ,  BELZ OTTO

    IPC: B01D9/00 ,  C23F14/00 ,  C23F15/00 ,  F28G9/00

    Abstract: In a process for depositing crystals from aqueous solutions using heat exchangers, the rate of alestration of heat from the solution is controlled and incrustation of the heat exchanger is prevented by measuring and regulating the temperature and/or feed rate of the solution and/or the temperature and/or feed rate of the coolant in such a way that the heat transfer is limited to a maximum within the range of 6000 to 15000 K Cals per hour per sq. metre of heat exchange surface, depending on the differential velocity between the solution and the heat exchange surface. The process may be controlled manually or automatically and may be used for aqueous solutions of organic or inorganic salts, e.g. alkali metal salts, NaNO3, or (NH4)2SO4, NH4Cl. Coolant is supplied to the heat exchanger at an elevated temperature during the first few minutes. If one medium is supplied at a constant rate and the temperature difference between the feed and discharge of this medium is increased or decreased, the feed rate of the other medium is decreased or increased respectively. If one medium is supplied to the heat exchanger at constant rate and the temperature difference between the feed of the one medium and the discharge of the other medium is increased, the feed rate of the other medium is increased, and vice versa. If the solution and coolant are supplied at constant rates and the temperature difference between the feed and discharge of the solution is increased, the temperature of the coolant is raised, and vice versa. If the solution is supplied to a heat exchanger at a constant rate and at a constant temperature and the discharge temperature of the solution is increased, the feed rate of the coolant is increased and vice versa, or if the coolant is supplied at a constant rate and a constant temperature and the discharge temperature of the coolant is increased, the feed rate of the solution is decreased, and vice versa. In batchwise operation the feed rate of the coolant is increased when the change in temperature of the solution measured at equal time intervals becomes smaller, and vice versa. In an example, a solution of NaNO3 saturated at 44 DEG C. was cooled with water at 13 DEG C. in a glass tube cooler at a heat exchange rate of 6900 K Cals per square metre per hour. Alternatively, a rotating cooling drum may be used.ALSO:In a process for depositing crystals from aqueous solutions using heat exchangers, the rate of abstraction of heat from the solution is controlled and incrustation of the heat exchanger is prevented by measuring and regulating the temeprature and/or the feed rate of solution and/or the coolant in such a way that the heat transfer is limited to a maximum within the range of 6000-15000 K Cals per hour per square metre of heat exchange surface, depending on the differential velocity between the solution and the heat exchange surface.

    New diazapolymethine dyes
    49.
    发明专利
    New diazapolymethine dyes 未知

    公开(公告)号：GB976055A

    公开(公告)日：1964-11-25

    申请号：GB1450863

    申请日：1963-04-11

    Applicant: BASF AG

    Inventor： DEHNERT JOHANNES ,  HANSEN GUENTER

    IPC: C09B26/04 ,  C09B29/033

    Abstract: The invention diazopolymethine dyes of formula wherein Z is a divalent radical which completes a 5- or 6-membered heterocyclic ring to which a further ring may be anellated, R1 is a hydrogen atom, a C1-C4 alkyl radical, a cyclohexyl, benzyl or phenyl radical, R2 is a C1-C4 alkyl radical or a benzyl radical, X is an anion and the ring A may contain non-ionic substituents. The dyes are prepared (a) by coupling a hydrazone of formula wherein Y is a hydrogen atom or an arylsulphonyl radical, or a salt thereof with a compound of formula in the presence of an oxidizing or dehydrogenating and optionally alkylating the resultant dye or (b) coupling a diazo compound of an amine of formula with a cyanomethylidene compound of the formula shown above and optionally alkylating the resulting dye. The dyes may be used to colour natural or regenerated cellulose, leather, synthetic polyamides, polyurethanes and polyesters and particularly polyacrylonitrile in yellow, red and violet shades. Examples describe the preparation of the dyes and their use in dyeing polyacrylonitrile fibres.

Patent Agency Ranking