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
  • C07C29/132—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group
  • C07C29/136—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group of >C=O containing groups, e.g. —COOH
  • C07C29/14—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group of >C=O containing groups, e.g. —COOH of a —CHO group
  • C07C29/141—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group of >C=O containing groups, e.g. —COOH of a —CHO group with hydrogen or hydrogen-containing gases
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
  • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
  • B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
  • B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
  • B01J23/85—Chromium, molybdenum or tungsten
  • B01J23/86—Chromium
  • B01J23/862—Iron and chromium
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
  • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
  • B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
  • B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
  • B01J23/85—Chromium, molybdenum or tungsten
  • B01J23/86—Chromium
  • B01J23/866—Nickel and chromium
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
  • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
  • B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
  • B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
  • B01J23/85—Chromium, molybdenum or tungsten
  • B01J23/86—Chromium
  • B01J23/868—Chromium copper and chromium
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
  • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
  • B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
  • B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
  • B01J23/889—Manganese, technetium or rhenium
  • B01J23/8892—Manganese
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
  • B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
  • B01J31/0234—Nitrogen-, phosphorus-, arsenic- or antimony-containing compounds
  • B01J31/0235—Nitrogen containing compounds
  • B01J31/0237—Amines
• • 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
  • C07C29/84—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment by distillation by extractive 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
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C31/00—Saturated compounds having hydroxy or O-metal groups bound to acyclic carbon atoms
  • C07C31/18—Polyhydroxylic acyclic alcohols
  • C07C31/20—Dihydroxylic alcohols
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
  • C07C45/61—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
  • C07C45/67—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton
  • C07C45/68—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms
  • C07C45/72—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms by reaction of compounds containing >C = O groups with the same or other compounds containing >C = O groups
  • C07C45/75—Reactions with formaldehyde
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C47/00—Compounds having —CHO groups
  • C07C47/02—Saturated compounds having —CHO groups bound to acyclic carbon atoms or to hydrogen
  • C07C47/19—Saturated compounds having —CHO groups bound to acyclic carbon atoms or to hydrogen containing hydroxy groups

Definitions

• the present invention relates to a process for the preparation of neopentyl glycol 1.
• Prevented aldol reaction is exempted. Such a bottoms product can then be hydrogenated so that not only is hydroxypivalaldehyde selectively reacted to neopentyl glycol, but also very high boiling impurities
• Neopentyl glycol can be reacted. The individual steps are explained in more detail below:
• This reaction is preferably carried out at a temperature of> 40 ° C to ⁇ 100 ° C and can be carried out continuously or discontinuously.
• formaldehyde is used in the form of aqueous formaldehyde solution.
• the isobutyraldehyde is present in excess of the formaldehyde, preferably a ratio of> 1.01: 1 (mol of isobutyraldehyde to mol of formaldehyde), more preferably> 1.03: 1, further preferably> 1.05: 1 to ⁇ 1.2: 1, most preferably > 1.1: 1 to ⁇ 1.15: 1.
• Step a) takes place in the presence of a basic catalyst, the basic catalyst preferably being used in a molar ratio of> 0.01 to ⁇ 0.1, based on the isobutyraldehyde.
• the basic catalyst preferably comprises trimethylamine and / or aqueous
• Alkaline solution preferably sodium and / or potassium hydroxide solution.
• step a) it is preferable after step a) to carry out a step a1): a) separation of the aqueous phase before carrying out step b)
• Step b) is preferably carried out in a thin-film evaporator.
• This preferably has an attached column with 10 to 30 trays. Also preferred are temperatures of> 170 ° C to ⁇ 200 ° C. Since the isobutyraldehyde is present in excess in step a), the distillation in the distillate produces a two-phase system consisting of an organic phase which i.w.
• the process thus comprises a step b1) which is carried out after step b): b1) recycling of the organic isobutyraldehyde-separated phase in step b) to react again in step a)
• Step b) is preferably carried out so that the bottoms product contains ⁇ 3, more preferably ⁇ 2 wt .-% water.
• the organic phase is fed to at least the sixth bottom of the attached column. It has been found that such a particularly good separation performance is possible.
• step c) takes place directly after step b), i. according to a preferred
• Embodiment of the invention takes place between step b) and c) no further purification of the distillation bottoms instead.
• step c) takes place at a pressure of> 6 MPa to ⁇ 20 MPa hydrogen, more preferably> 8 MPa to ⁇ 18 MPa.
• step c) takes place at a temperature of> 100 ° C to ⁇ 220 ° C, this has been proven in practice.
• Step c) can be carried out in a single-stage reactor.
• a two- or multi-stage hydrogenation in a multi-zone reactor.
• the pressure conditions are then in each case the pressure conditions over the entire reactor.
• a two-stage hydrogenation it preferably takes place in such a way that in the zone of the reactor which is first reached by the hydrogenation product at> 100 to ⁇ 140 ° C and a V / Vh of> 0.7 - ⁇ 1.0 h 1 (based only on the first zone of the reactor) and in the subsequent zone of the reactor at> 150 to ⁇ 220 ° C. and a V / Vh of> 0.2 -> 0.8 h -1 (referred to only on the second zone of the reactor) is worked.
• the catalyst preferably comprises a catalyst on nickel and / or
• Copper chromite base preferably with manganese and / or barium doping. This has proven itself in practice. Depending on the application and specific field of application of the process, the product may then undergo further purification steps, such as specification-compliant
• Nitric acid and 150 g of barium nitrate are distilled in 20 L. H 2 0 dissolved at 55 ° C.
• 2.6 kg of ammonium dichromate are dissolved in 12 L of water and 4 L of 25% ammonia solution. Thereafter, the ammonium dichromate solution is slowly dropped into the copper nitrate solution. A red-brown solid precipitates. To complete the precipitation, the mixture is stirred for a further hour and cooled to room temperature. Subsequently, the solid is filtered off. Then the solid is dried at 110 ° C in a drying oven. The dry solid is calcined at 350 ° C for four hours, the rate of heating is 2 ° C / min.
• the solid can be used as a catalyst.
• the catalyst had the following composition, based on the proportion of copper, chromium, manganese and barium, on:
• Trimethylamine 50%> - ige aqueous solution
• the reaction mixture is heated to 90 ° C and left at this temperature for one hour. Then the product is drained.
• the composition of the product is: Substance share / g
• This mixture is then processed by distillation in a thin-film evaporator with attached column.
• the mixture is fed to the bottom 20 of a 26-tray packed column.
• the thin-film evaporator is operated at 170.degree.
• a two-phase distillation head and a distillation bottoms are obtained.
• the organic phase of the distillation head has the following composition:
• Aldolization be used.
• the aqueous phase of the distillation head has the following composition: Substance share / g
• distillation bottoms have the following composition:
• distillation bottoms are then hydrogenated as follows:
• the above catalyst is mixed with 3% graphite and tabletted.
• the resulting 5x5 mm tablets are placed in a 1.3 liter tubular reactor.
• the reactor is equipped so that the lower 0.3 liter of the catalyst bed can be heated separately and the upper 1.0 liter of catalyst bed can also be heated separately.
• both catalyst beds are each the same
• the catalyst is activated as follows:
• the lower bed is then heated to 130 ° C. and the upper bed to 170 ° C., a hydrogen pressure of 8 MPa is applied and 300 ml / h of the distillation bottoms from Example 2 are fed from below into the reactor.
• the product obtained therefrom has the following composition:

Landscapes

• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=52598713

Family Applications (1)

Country Status (7)

Families Citing this family (4)

Citations (3)

Family Cites Families (9)

• 2014
  • 2014-01-28 DE DE102014100996.7A patent/DE102014100996B4/de not_active Expired - Fee Related
• 2015
  • 2015-01-26 WO PCT/EP2015/051466 patent/WO2015113928A1/de not_active Ceased
  • 2015-01-26 EP EP15707553.2A patent/EP3099656B1/de active Active
  • 2015-01-26 CN CN201580002718.7A patent/CN105764879B/zh active Active
  • 2015-01-26 JP JP2016536163A patent/JP6373385B2/ja active Active
  • 2015-01-26 US US15/037,346 patent/US20160326073A1/en not_active Abandoned
  • 2015-01-26 KR KR1020167011714A patent/KR101846755B1/ko not_active Expired - Fee Related

Patent Citations (3)

Also Published As

Similar Documents

Legal Events