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    1.
    发明专利
    未知

    公开(公告)号：DE4102394A1

    公开(公告)日：1992-07-30

    申请号：DE4102394

    申请日：1991-01-28

    Applicant: HOECHST AG

    Inventor： AIGNER RUDOLF DIPL ING ,  MUELLER GUENTHER DR ,  SCHOLZ HANS JUERGEN DR ,  WEHLE DETLEF DR

    IPC: C07C213/02 ,  C07C213/04 ,  C07C215/10

    Abstract: The novel process is based on the reaction of a dialkylamine, preferably dimethylamine or diethylamine, with a monohalopropanediol, preferably monochloropropanediol, in the presence of water. The reaction is carried out in the presence of 25 to 70% by weight of water and at a temperature of from 20 to 80 DEG C, the dialkylamine being employed in an amount of at least 2.5 mol per mol of monohalopropanediol. The novel process allows a high space-time-yield and also a high chemical yield of virtually pure dialkylaminopropanediol to be obtained.

    2.
    发明专利
    未知

    公开(公告)号：DE4211190A1

    公开(公告)日：1993-10-07

    申请号：DE4211190

    申请日：1992-04-03

    Applicant: HOECHST AG

    Inventor： AIGNER RUDOLF DIPL ING ,  MAIER GUILLERMO DIPL ING ,  MUELLER RAINER ,  SEITZ HUBERT DR

    IPC: C07C227/08 ,  C07C229/12 ,  C07C229/16 ,  C07C231/12 ,  C07C233/36 ,  C11D1/90 ,  C07C229/06

    Abstract: A process is described for the preparation of aqueous solutions of betaines of the formula (* CHEMICAL STRUCTURE *) in which: R1 is an alkyl radical having 6 to 22 carbon atoms or is a radical of the formula R'CONH(CH2)z-, in which R' has the meaning of R1 and z is 2, 3 or 4, R2 is an alkyl radical having 1 to 4 carbon atoms or is a radical of the formula -(CH2)m-OH, in which m is 1, 2 or 3, R3 is an alkyl radical having 1 to 4 carbon atoms or is a radical of said formula -(CH2)m-OH and y is 1, 2 or 3. The aqueous betaine solutions are prepared by quaternization of the corresponding tertiary amines with an (omega)-halocarboxylic acid and with an alkali metal hydroxide in the aqueous phase. The quaternization is carried out continuously in two or three stirred tanks arranged in a cascade, defined process characteristics being maintained in each tank. Using the novel process, aqueous betaine solutions are obtained in high yield and purity in a simple manner.

    3.
    发明专利
    未知

    公开(公告)号：DE19607824A1

    公开(公告)日：1997-09-04

    申请号：DE19607824

    申请日：1996-03-01

    Applicant: HOECHST AG

    Inventor： EYRISCH OLIVER DR ,  AIGNER RUDOLF DIPL ING

    IPC: C11D1/62 ,  A01N37/12 ,  A61K8/44 ,  A61Q19/00 ,  C07C213/02 ,  C07C213/06 ,  C07C213/08 ,  C07C219/06 ,  C07C219/08 ,  C09K23/00 ,  C09K23/18 ,  D06M13/463 ,  B01F17/18

    Abstract: The invention concerns esterquats of the following formula (1), in which RCO is a C6-C22 aliphatic acyl group, R is a methyl group, R is a C1-C6 alkyl group, R is a C3-C6 alkyl group and X is a halogen anion. These esterquats are prepared by quaternization of the corresponding carboxylic acid ethanolamine ester compound with a methyl halide per se or in the presence of solvents. The esterquats according to the invention have a low melting point. Moreover, they have good solubility in water, even in high concentrations, and, owing to their preparation, have high purity and are free from toxic portions. These esterquats can be used in numerous applications and are suitable, for example, for preparing solid or aqueous formulations with a highly surfactant effect.

    5.
    发明专利
    未知

    公开(公告)号：DE3803110A1

    公开(公告)日：1989-08-17

    申请号：DE3803110

    申请日：1988-02-03

    Applicant: HOECHST AG

    Inventor： AIGNER RUDOLF DIPL ING ,  MUELLER GUENTHER DR ,  MUELLER RAINER ,  REUNER HORST DIPL ING

    IPC: C07C305/00 ,  C07C303/24 ,  C07C303/44 ,  C07C305/04 ,  C07C305/06 ,  C07C305/10 ,  C07C305/18 ,  C09K23/02 ,  C11D3/34

    Abstract: A process for the preparation of sulfated alkanol oxethylates or alkylphenol oxethylates is described. After completion of the reaction with SO3, 0.1 to 0.5% by weight, relative to the alkanol oxethylates or alkylphenol oxethylates employed, of at least one of the following compounds: water, ethanol, 1-propanol, 2-propanol or n-heptane are admixed to the reaction mixture and liquid and gas are subsequently separated at a temperature of 20 DEG to 60 DEG C. The liquid is then neutralized with aqueous alkali as customary and leads to ether sulfate/water mixtures with considerably reduced contents of 1,4-dioxane which can either be used without further aftertreatment or with a considerably reduced outlay in terms of aftertreatment as personal hygiene agents and for various other purposes.

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