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    Process for the purification of lactams
    2.
    发明授权
    Process for the purification of lactams 失效
    洗涤液的方法

    公开(公告)号：US3476744A

    公开(公告)日：1969-11-04

    申请号：US3476744D

    申请日：1966-06-07

    Applicant: INVENTA AG

    Inventor： BERTHER CLAU ,  SAILER RICHARD

    IPC: B01D9/00 ,  B01D11/04 ,  C07D201/16 ,  C07D41/00 ,  C07D41/06

    CPC classification number: C07D201/16 ,  B01D9/0036 ,  B01D9/0059 ,  B01D11/0488

    Abstract: Lactams are purified by forming a melt of crude lactam and adding to it sufficiently finely divided solid crude lactam to make a mixture in which the melt forms 50-90% by weight, maintaining the mixture in an adiabatic state and, after melting equilibrium is reached, separating crystals of purified lactam from the mixture. The process is particularly suitable for the purification of lactams having 7-13 ring members. The crude lactam may be subjected to a preliminary treatment with potassium permanganate prior to purification.

    PROCESS FOR PRODUCING SYNTHETIC ESTER OILS
    5.
    发明专利
    PROCESS FOR PRODUCING SYNTHETIC ESTER OILS 未知

    公开(公告)号：HU172801B

    公开(公告)日：1978-12-28

    申请号：HUIE000474

    申请日：1971-09-06

    Applicant: INVENTA AG

    Inventor： SAILER RICHARD ,  BERTHER CLAUS

    IPC: C10M177/00 ,  C07C20060101 ,  C07C67/08 ,  C07C69/02 ,  C07C69/22 ,  C07C69/28 ,  C07C69/66 ,  C07C69/74 ,  C10M20060101 ,  C10M105/38 ,  C10M169/00 ,  C10M3/20

    Abstract: 1356405 Synthetic ester oils INVENTA AG 5 Aug 1971 [7 Sept 1970] 36859/71 Heading C2C [Also in Division C5] Novel ester oils in which the alcohol moieties comprise moieties of a C 2 -C 20 polyol containing primary hydroxy groups and/or of a branched chain C 3 -C 18 monoalcohol and the acid moieties comprise moieties of acids obtained in admixture as by-products in the oxidation of a C 6 - C 12 cycloalkane by means of a gas comprising molecular oxygen to give a cycloalkanol/cycloalkanone mixture as predominant reaction product, are synthesized by an esterification process wherein the alcoholic starting material comprises an aforesaid polyol and/or branched monoalcohol and the acidic starting material comprises the aforesaid mixture of acids or by an appropriate transesterification. A typical mixture of acids obtained by oxidation of cyclohexane using air and, for example, cobalt naphthenate as catalyst, followed by extraction with aqueous alkali, acidification and extraction of the liberated acids with cyclohexane, comprises 5-45% by weight of butyric acid, 40-80% by weight of valeric acid and 15- 55% by weight of caproic acid. If, however, the final extraction is carried out with methyl ethyl ketone, then the mixture of acids obtained comprises 40-60% by weight of the above mixture together with 20-40% by weight of hydroxycaproic acid and 20-40% by weight of a mixture of dicarboxylic acids comprising 65-85% by weight of adipic acid and lesser amounts of succinic and glutaric acids. Preferred polyols are polyethylene glycol, dimethylpropanediol, the polyethylene glycol 200 di-ester of decanedicarboxylic acid, trimethylol propane and pentaerythritol and the preferred branched chain C 3 -C 18 monohydric alcohol is 2-ethylhexanol. The acid starting material may also comprise additional monocarboxylic acids and/ or C 6 -C 12 dicarboxylic acids, e.g. decanedicarboxylic acid. The synthetic ester oils may be used as lubricating oils, e.g. mixed with either an antioxidant or a mineral oil.

    Methyl cyclohexanone prepd. by direct hydrogenation of cresol
    6.
    发明专利
    Methyl cyclohexanone prepd. by direct hydrogenation of cresol 未知

    公开(公告)号：CH595309A5

    公开(公告)日：1978-02-15

    申请号：CH1300075

    申请日：1975-10-07

    Applicant: INVENTA AG

    Inventor： SAILER RICHARD

    IPC: C07C45/00 ,  C07C49/30

    Abstract: Prepn. of methyl cyclohexanone by direct hydrogenation of cresol in presence of a catalyst of a Pt metal on a carrier of alkaline earth carbonate, opt. mixed with an alkaline earth hydrogen phosphate.Pref. hydrogenation is in gas or trickle phase, using the catalyst in the form of tablets, preforms or pellets. The catalyst consists of 1-5 wt.% Pd on a CaCO3 carrier made by mixing 5-20 wt.% solns. of caCl2 and Na2CO3 at 50-90 degrees C.A single-stage process is used, without intermediate prepn. of methyl cyclohexanol. The catalyst is more active and selective than the known Pd catalyst on carbon carrier, and large quantities of solvent are not required for the reaction.

    Decanedicarboxylic acid purification by forming salts
    7.
    发明专利
    Decanedicarboxylic acid purification by forming salts 未知

    公开(公告)号：DE1903571A1

    公开(公告)日：1969-10-16

    申请号：DE1903571

    申请日：1969-01-24

    Applicant: INVENTA AG

    Inventor： SAILER RICHARD

    IPC: C07C51/487

    Abstract: Decanedicarboxylic acid contaminated with other dicarboxylic acids is purified by treating with an aq. alkali soln. with at least 1/2 equiv. alkali rel. to dicarboxylic acids occurring as impurities, and separating the purified acid. Simple process which is also suitable for separation of large proportions of lower, esp. nonane- and octane-dicarboxylic acids.

    Polyester production
    9.
    发明专利
    Polyester production 未知

    公开(公告)号：GB2118565A

    公开(公告)日：1983-11-02

    申请号：GB8310663

    申请日：1983-04-20

    Applicant: INVENTA AG

    Inventor： EL-GHATTA HUSSAIN ,  PHILIPP HANS-WERNER ,  SAILER RICHARD ,  DOMEISEN BRUNO

    IPC: C08G63/80 ,  C08G63/90 ,  C08G63/26

    Abstract: Highly condensed polyester, e.g. polyethylene terephthalate, is produced by a continuous, two- stage treatment of a granulate (intrinsic viscosity at least approximately 0.35). In a first stage, water vapour is used. The second stage involves condensation by conventional methods. The highly condensed polyethylene terephthalate which can be obtained is eminently suitable for use in the food industry, in particular for bottles, owing to its considerably reduced total acetaldehyde content.

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