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    Process for the continuous production of alkali metal salts of nitrilotriacetic acid
    2.
    发明授权
    Process for the continuous production of alkali metal salts of nitrilotriacetic acid 失效
    连续生产硝酸的碱金属盐的方法

    公开(公告)号：US3668246A

    公开(公告)日：1972-06-06

    申请号：US3668246D

    申请日：1968-08-12

    Applicant: BASF AG

    Inventor： BERDING CHRISTOPH ,  GUENTHERT PAUL ,  KOEHLER WALDEMAR ,  SCHULZ GERHARD

    IPC: C07C101/20

    Abstract: Continuous production of alkali metal salts of nitrilotriacetic acid from an alkali metal cyanide, formaldehyde and ammonia by reaction of the components in at least two stages, the alkali metal cyanide being reacted with formaldehyde in stoichiometric or substantially stoichiometric ratio at temperatures of 50* to 200* and pressures of from atmospheric pressure to 50 atmospheres gauge in the presence of an excess of ammonia in the first stage and (while simultaneously removing ammonia) further amounts of alkali metal cyanide and formaldehyde being allowed to act at temperatures of 60* to 110*C in one or more subsequent stages, 5 to 35 mole percent of the total amount of alkali metal cyanide required being replaced by free hydrocyanic acid and/or hydroxyacetonitrile.

    Abstract translation: 在至少两个阶段通过组分的反应从碱金属氰化物，甲醛和氨连续生产次氮基三乙酸的碱金属盐，碱金属氰化物与化学计量或基本上化学计量比的甲醛与50至200℃的温度反应 DEG和在大气压至50大气压的压力下，在第一阶段存在过量的氨的情况下，（同时除去氨），另外量的碱金属氰化物和甲醛允许在60〜110℃的温度下作用 在一个或多个后续阶段中，所需的碱金属氰化物的总量的5-35摩尔％被游离氢氰酸和/或羟基乙腈代替。

    Production of alkali metal salts of nitrilotriacetic acid
    4.
    发明授权
    Production of alkali metal salts of nitrilotriacetic acid 失效
    生产硝酸的碱金属盐

    公开(公告)号：US3689543A

    公开(公告)日：1972-09-05

    申请号：US3689543D

    申请日：1969-08-08

    Applicant: BASF AG

    Inventor： BERDING CHRISTOPH ,  GUENTHERT PAUL ,  SCHULZ GERHARD ,  KOEHLER WALDEMAR

    IPC: C07C101/20

    CPC classification number: C11D3/33

    Abstract: Production of alkali metal salts of nitrilotriacetic acid from an alkali metal cyanide, formaldehyde and ammonia by reaction in at least two stages, the alkali metal cyanide being reacted with formaldehyde in approximately stoichiometric ratio of 50* to 200* C. and 2 to 50 atmospheres gauge in the presence of an excess of ammonia in the first stage and the resultant solution (after decompression to atmospheric pressure) being treated in one or more further stages with further amounts of alkali metal cyanide and formaldehyde at 60* to 110* C. while removing ammonia at the same time.

    Abstract translation: 通过至少两个阶段的反应，从碱金属氰化物，甲醛和氨生产次氮基三乙酸的碱金属盐，使碱金属氰化物与甲醛反应，化学计量比约为50至200℃和2至50个大气压 在第一阶段存在过量的氨，并在所得溶液（在减压至大气压之后）在一个或多个其它阶段用更多量的碱金属氰化物和甲醛在60℃至110℃下进行处理，同时 同时去除氨。

    Continuous production of alkali metal salts of nitrilotriacetic acid
    5.
    发明授权
    Continuous production of alkali metal salts of nitrilotriacetic acid 失效
    连续生产硝酸的碱金属盐

    公开(公告)号：US3607930A

    公开(公告)日：1971-09-21

    申请号：US3607930D

    申请日：1968-07-08

    Applicant: BASF AG

    Inventor： BERDING CHRISTOPH ,  GUENTHERT PAUL ,  KOEHLER WALDEMAR ,  SCHULZ GERHARD

    IPC: C07C101/20

    CPC classification number: C11D3/33

    Abstract: A continuous process for the production of alkali metal salts of nitrilotriacetic acid by reaction in a first stage of alkali metal cyanide, formaldehyde and excess ammonia at superatmospheric pressure and elevated temperature to form an aminoacetic acid solution, followed by depressurizing and treating the solution obtained with further amounts of alkali metal cyanide and formaldehyde while removing the ammonia formed until conversion to nitrilotriacetic acid is complete.

    Isothermal calorimetry method and apparatus therefor
    7.
    发明授权
    Isothermal calorimetry method and apparatus therefor 失效
    同位素测定方法及其设备

    公开(公告)号：US3869914A

    公开(公告)日：1975-03-11

    申请号：US30899772

    申请日：1972-11-24

    Applicant: BASF AG

    Inventor： KOEHLER WALDEMAR ,  RIEDEL OSWALD ,  SCHERER HERTBERT ,  SCHLERETH GEORG

    IPC: G01K17/04 ,  G01N25/48 ,  G01K17/00

    CPC classification number: G01N25/4826 ,  G01K17/04

    Abstract: Method and apparatus for isothermal calorimetry in which the temperature within the calorimeter is maintained at a constant value by the application of energy in the form of pulses of constant power, which pulses are counted and summated, the number of pulses per unit time being determined by temperature control means.

    Abstract translation: 通过以恒定功率的脉冲形式施加能量来量热计内的温度维持在恒定值的方法和装置，该脉冲被计数和相加，每单位时间的脉冲数由 温度控制装置。

    PRODUCTION OF ANHYDROUS 1,4-DIOXANE
    8.
    发明专利
    PRODUCTION OF ANHYDROUS 1,4-DIOXANE 未知

    公开(公告)号：CA946404A

    公开(公告)日：1974-04-30

    申请号：CA146547

    申请日：1972-07-06

    Applicant: BASF AG

    Inventor： SCHECKER HANS-GEORG ,  KOEHLER WALDEMAR ,  SANDER BRUNO

    IPC: C07D319/12

    Abstract: 1387048 1,4-Dioxane BADISCHE ANILIN- & SODA-FABRIK AG 7 July 1972 [8 July 1971] 31929/72 Heading C2C Anhydrous 1,4-dioxane is prepared by mixing a catalyst consisting of SiF 4 , BF 3 or an adduct formed from BF 3 and 1,4-dioxane, with liquid ethylene oxide at a temperature of from -50‹ C. to 0‹ C. and keeping the mixture at a temperature of from -25‹ C to + 10‹ C. for 1-10 hours. A small amount of 1,3-dioxolane may also be formed.

    MULTIPLE-STEP PROCESS FOR THE PREPARATION OF HEXAMETHYLENE DIISOCYANATE-1,6 AND/OR ISOMERIC ALIPHATIC DIISOCYANATES WITH SIX CARBON ATOMS IN THE ALKYLENE RESIDUE
    10.
    发明专利
    MULTIPLE-STEP PROCESS FOR THE PREPARATION OF HEXAMETHYLENE DIISOCYANATE-1,6 AND/OR ISOMERIC ALIPHATIC DIISOCYANATES WITH SIX CARBON ATOMS IN THE ALKYLENE RESIDUE 未知

    公开(公告)号：CA1225999A

    公开(公告)日：1987-08-25

    申请号：CA452343

    申请日：1984-04-18

    Applicant: BASF AG

    Inventor： MERGER FRANZ ,  TOWAE FRIEDRICH ,  HELLBACH HANS ,  ISBARN GUNTHER ,  KOEHLER WALDEMAR

    IPC: C07C265/14 ,  C07C67/00 ,  C07C69/00 ,  C07C241/00 ,  C07C263/04 ,  C07C263/06 ,  C07C265/04 ,  C07C119/042

    Abstract: MULTIPLE-STEP PROCESS FOR THE PREPARATION OF HEXAMETHYLENE DIISOCYANATE-1,6 AND/OR ISOMERIC ALIPHATIC DIISOCYANATES WITH SIX CARBON ATOMS IN THE ALKYLENE RESIDUE Hexamethylene diisocyanate and/or isomeric alkylene diisocyanates having 6 carbon atoms in the alkylene radical, preferably 2-methylpentamethylene 1,5-diiqocyanate and/or 2-ethyltetramethylene 1,4-diisocyanate are prepared without the use of phosgene in a multiple-step process by means of a) reacting hexamethylene 1,6-diamine and/or isomeric alkylene diamines having 6 carbon atoms in the alkylene radical with urea and alcohol in the presence of dialkyl carbonate and/or carbamic acid alkyl ester as well as, in some cases, catalysts to form hexamethylene 1,6-dialkylurethane and/or isomeric alkylene dialkylurethanes having 6 carbon atoms in the alkylene radical, b) separation and return to reaction step (a) of alcohol, dialkyl carbonate, and/or carbamic acid alkyl ester from the reaction mixture c) evaporation of the hexamethylene 1,6-dialkylurethane and/or isomeric alkylene dialkylurethanes having 6 carbon atoms in the alkylene radical, d) cleavage of the vaporized diurethanes into hexa methylene diisocyanate and/or isomeric alkylene diisocyanate having 6 carbon atoms in the alkylene radical and alcohol, and e) fractional condensation of the cleavage products.

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