Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
  • C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
  • C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
  • C07C29/80—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment by distillation
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
  • C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
  • C07C29/94—Use of additives, e.g. for stabilisation
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
  • C07H15/00—Compounds containing hydrocarbon or substituted hydrocarbon radicals directly attached to hetero atoms of saccharide radicals
  • C07H15/02—Acyclic radicals, not substituted by cyclic structures
  • C07H15/04—Acyclic radicals, not substituted by cyclic structures attached to an oxygen atom of the saccharide radical

Definitions

• the invention relates to a process for working up contaminated fatty alcohol mixtures, in which
• the invention relates to a process for working up contaminated fatty alcohol mixtures, in which
• Fatty alcohols which serve as a further feed component, are to be understood as primary aliphatic alcohols of the formula (I)
• R 1 represents an aliphatic, linear or branched hydrocarbon radical having 6 to 22 carbon atoms and 0 and / or 1, 2 or 3 double bonds.
• Typical examples are capronic alcohol, caprylic alcohol, 2-ethylhexyl alcohol, capric alcohol, lauryl alcohol, isotridecyl alcohol, myristyl alcohol, cetyl alcohol, palmoleyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, elaidyl alcohol, petroselinyl alcohol, linolenyl alcohol, linolyl alcohol, linoleyl alcohol, linoleyl alcohol Technical mixtures which are obtained, for example, in the high-pressure hydrogenation of technical methyl esters based on fats and oils or aldehydes from Roelen's oxosynthesis and as a monomer fraction in the dimerization of unsaturated fatty alcohols.
• acids are used in amounts of 0.1 to 10, preferably 0.5 to 5 and in particular 1% by weight, based on the fatty alcohol.
• Organic acids such as, for example, sulfosuccinic acid or alkylbenzenesulfonic acids are preferably used, the alkyl radical representing 1 to 14, preferably 1 or 12, carbon atoms.
• the use of dodecylbenzenesulfonic acid or p-toluenesulfonic acid is preferred.
• the acid treatment is usually carried out with stirring at pressures from 1 to 200, preferably 20 to 30 mbar and at temperatures from 50 to 120, preferably around 105 ° C.
• the reaction time is usually 30 minutes to 2 hours.
• Existing or formed water is distilled off under the conditions mentioned above.
• the purified fatty alcohol is generally distilled from the residue at a pressure of 1 to 50 mbar, preferably 10 mbar and in a temperature range of 50 to 250, preferably 150 ° C. A residue of 1 to 10% remains in the bladder.
• Glucose was acetalized with technical C. 4 4 coconut fatty alcohol in a molar ratio of 1: 4 and with the addition of 1% by weight of dodecylbenzenesulfonic acid at 112 ° C. and 20 mbar to the alkyl oligoglycocoside.
• the water of condensation was continuously removed from the equilibrium.
• the reaction was complete and the excess fatty alcohol was separated from the reaction product in a combination of a falling film and a thin film evaporator. The fatty alcohol was worked up separately.
• the alcohol separated from the acetalization was, as described in EP 0387912 B1, washed with an aqueous solution of 42% by weight NaOH and 12% by weight sodium borohydride, distilled and then returned to the reaction mixture. When returned to the acetalization, the reaction time increased from 6.5 to 7.5 hours.
• the fatty alcohol separated from the reaction mixture was mixed with 1% by weight of dodecylbenzenesulfonic acid and stirred at 105 ° C. and 30 mbar for 1 hour. The pressure was then reduced to 1 mbar and the temperature increased to 150 ° C., so that the fatty alcohol distilled over into the receiver. A 5% residue remained in the bladder. When returned to the acetalization, the reaction time was reduced from 6.5 to 5.1 hours.

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Crystallography & Structural Chemistry (AREA)
• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Biochemistry (AREA)
• Biotechnology (AREA)
• General Health & Medical Sciences (AREA)
• Genetics & Genomics (AREA)
• Molecular Biology (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Applications Claiming Priority (3)

Publications (1)

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• 1998
  • 1998-10-21 DE DE19848548A patent/DE19848548C2/de not_active Expired - Lifetime
• 1999
  • 1999-10-12 AU AU10358/00A patent/AU1035800A/en not_active Abandoned
  • 1999-10-12 KR KR1020017004882A patent/KR20010080232A/ko not_active Application Discontinuation
  • 1999-10-12 CN CN99812424A patent/CN1324339A/zh active Pending
  • 1999-10-12 WO PCT/EP1999/007657 patent/WO2000023406A1/de not_active Application Discontinuation
  • 1999-10-12 EP EP99953786A patent/EP1123263A1/de not_active Withdrawn
  • 1999-10-12 JP JP2000577135A patent/JP2002527495A/ja active Pending

Non-Patent Citations (1)

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