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    CONTINUOUS PROCESS FOR THE PREPARATION OF DIMETHYLDIALLYLAMMONIUM CHLORIDE
    13.
    发明专利
    CONTINUOUS PROCESS FOR THE PREPARATION OF DIMETHYLDIALLYLAMMONIUM CHLORIDE 未知

    公开(公告)号：CA1260501A

    公开(公告)日：1989-09-26

    申请号：CA515740

    申请日：1986-08-12

    Applicant: HOECHST AG

    Inventor： AIGNER RUDOLF ,  BLASCHKE GUENTER ,  MUELLER GUENTER

    IPC: C07C209/00 ,  C07C67/00 ,  C07C209/12 ,  C07C211/21 ,  C07C211/63 ,  C07C239/12 ,  C07C87/30

    Abstract: A continuous process for the preparation of dimethyldiallylammonium chloride In the continuous process described for the preparation of dimethyldiallylammonium chloride by reaction, with stirring, of dimethylamine, allyl chloride and alkali metal hydroxide which is dissolved in water, the reaction is carried out in at least two stirred vessels arranged in the form of a cascade. Dimethylamine and allyl chloride in the stoichiometric amount in each case and only 60 to 95 mol % of the stoichiometrically necessary amount of alkal; metal hydroxide are fed to the first stirred vessel and conducted through the vessel at a temperature of 20 to 70.degree.C with a residence time such that the product leaving the vessel and flowing to the further vessels still contains at most 10 mol % of free amine, mol percentages being related to the molar amount of dimethylamine employed; the alkali metal hydroxide lacking in the first stirred vessel compared to the stoichiometric amount is fed continuously to the further stirred vessels mentioned and in these vessels, at a temperature of 20 to 70.degree.C, a residence time is set such that the product leaving the vessel still contains at most 2 mol % of free amine in each case. The desired dimethyldiallylammonium chloride is obtained from the product leaving the stirred vessel cascade.

    14.
    发明专利
    未知

    公开(公告)号：FI890483A0

    公开(公告)日：1989-02-01

    申请号：FI890483

    申请日：1989-02-01

    Applicant: HOECHST AG

    Inventor： AIGNER RUDOLF ,  MUELLER GUENTHER ,  MUELLER RAINER ,  REUNER HORST

    IPC: C07C303/24 ,  C07C305/00 ,  C07C303/44 ,  C07C305/04 ,  C07C305/06 ,  C07C305/10 ,  C07C305/18 ,  C09K23/02 ,  C11D3/34 ,  C07C

    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.

    Colourless tetra:acetyl-ethylene di:amine prepn. - by di:acetyl ethylene di:amine acetylation with acetic anhydride opt. with ketene addn.
    17.
    发明专利
    Colourless tetra:acetyl-ethylene di:amine prepn. - by di:acetyl ethylene di:amine acetylation with acetic anhydride opt. with ketene addn. 未知

    公开(公告)号：DE2906606A1

    公开(公告)日：1980-09-04

    申请号：DE2906606

    申请日：1979-02-21

    Applicant: HOECHST AG

    Inventor： MUELLER-SCHIEDMAYER GUENTHER D ,  AIGNER RUDOLF

    IPC: C07C103/90 ,  C07C102/00

    Abstract: Prepn. of N,N,N',N'-tetraacetyl-ethylene diamine (II) by acetylating N,N'-diacetyl-ethylene diamine (I) with acetic anhydride at 120-170 degrees C is carried out as follows. (I) and (II) are charged in wt. ratio 1:1 to 1:10 esp. 1:1 to 1:2.5, pref. with the addn. of 0.01-0.3 pts. wt. ketene based on (I). Acetylation is interrupted before establishing reaction equilibrium between (I) and (II). The brown reaction mixt. is purified to remove colouring contaminants, before or after separating (II) by crystallisation. The purified and recovered reaction components which are incompletely converted to (II) are recycled to acetylation. (II) is a perborate activator in detergent compsns. Colourless (II) is obtd. in yields of >97%. Ketene addn. reduces reaction time and increases space-time yield.

    19.
    发明专利
    未知

    公开(公告)号：DE59202472D1

    公开(公告)日：1995-07-20

    申请号：DE59202472

    申请日：1992-01-23

    Applicant: HOECHST AG

    Inventor： AIGNER RUDOLF ,  MUELLER GUENTER 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.

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