GB958654A - Process for the manufacture of polyhydric alcohols - Google Patents

Process for the manufacture of polyhydric alcohols

Info

Publication number
GB958654A
GB958654A GB42676/59A GB4267659A GB958654A GB 958654 A GB958654 A GB 958654A GB 42676/59 A GB42676/59 A GB 42676/59A GB 4267659 A GB4267659 A GB 4267659A GB 958654 A GB958654 A GB 958654A
Authority
GB
United Kingdom
Prior art keywords
mixture
reaction
mixing
stage
alkaline condensing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB42676/59A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB958654A publication Critical patent/GB958654A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C07C31/22—Trihydroxylic alcohols, e.g. glycerol
    • 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
    • C07C45/74—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 combined with dehydration

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Polyhydric alcohols are produced continuously by the aldol condensation of formaldehyde with a higher aldehyde in an aqueous medium in the presence of an alkaline condensing agent followed by the Cannizzaro reaction, in a first stage of which the aldehydes and the alkaline condensing agent are continuously introduced into one or more reaction vessels in series through which the reactants are passed continuously while subjected to "back-mixing" with 40-90% of the proportion of formaldehyde necessary for the aldol reaction has reacted, and in a second stage of which the resulting mixture is passed through one or more reaction vessels in series in which the mixture is further reacted without being subjected to "back-mixing" so that all parts of the mixture have substantially equal residence times in the vessel or vessels. The term "back-mixing" is used to signify that parts of the reaction mixture that are of different ages, i.e. have spent different periods in the reactor, mix with each other. The first stage is preferably carried out at 0-60 DEG C. and the second at 15-55 DEG C. Suitable higher aldehydes are, for acetaldehyde, propionaldehyde, butyraldehyde, and isobutyraldehyde. When acetaldehyde is used the product is a mixture of pentaerythritol, dipentaerythritol and polypentaerythritols. Suitable alkaline condensing agents and, for example, calcium or barium hydroxide, caustic soda, caustic potash, sodium carbonate, potassium carbonate and trimethyl-ammonium hydroxide. Specifications 357,783, 757,564, and 958,024 are referred to.
GB42676/59A 1958-12-15 1959-12-15 Process for the manufacture of polyhydric alcohols Expired GB958654A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM39949A DE1153739B (en) 1958-12-15 1958-12-15 Process and device for the production of higher polyhydric alcohols

Publications (1)

Publication Number Publication Date
GB958654A true GB958654A (en) 1964-05-21

Family

ID=7303554

Family Applications (1)

Application Number Title Priority Date Filing Date
GB42676/59A Expired GB958654A (en) 1958-12-15 1959-12-15 Process for the manufacture of polyhydric alcohols

Country Status (3)

Country Link
BE (1) BE585536A (en)
DE (1) DE1153739B (en)
GB (1) GB958654A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935274A (en) * 1968-04-24 1976-01-27 Hoechst Aktiengesellschaft Process for the continuous preparation of hydroxypivaldehyde
US3975450A (en) * 1974-09-03 1976-08-17 Eastman Kodak Company Process for the preparation of polyhydric alcohols
US5741956A (en) * 1996-05-22 1998-04-21 Patentes Y Novedades Process for the preparation of pentaerythritol
CN110878005A (en) * 2019-12-09 2020-03-13 赤峰瑞阳化工有限公司 Continuous condensation process of trimethylolpropane and ditrimethylolpropane
WO2020067963A1 (en) * 2018-09-28 2020-04-02 Perstorp Ab Process for production of pentaerythritol with an increased yield of di-pentaerythritol
CN113956132A (en) * 2021-11-19 2022-01-21 吉林化工学院 Preparation method of trimethylpentanediol

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1166170B (en) * 1960-02-18 1964-03-26 Montedison Spa Process for the continuous production of pentaerythritol

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB742159A (en) * 1952-10-29 1955-12-21 Celanese Corp Production of pentaerythritol
GB757564A (en) * 1953-05-21 1956-09-19 Celanese Corp Continuous production of pentaerythritol

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935274A (en) * 1968-04-24 1976-01-27 Hoechst Aktiengesellschaft Process for the continuous preparation of hydroxypivaldehyde
US3975450A (en) * 1974-09-03 1976-08-17 Eastman Kodak Company Process for the preparation of polyhydric alcohols
US5741956A (en) * 1996-05-22 1998-04-21 Patentes Y Novedades Process for the preparation of pentaerythritol
SG89242A1 (en) * 1996-05-22 2002-06-18 Patentes Novedades Sa A process for the preparation of pentaerythritol
WO2020067963A1 (en) * 2018-09-28 2020-04-02 Perstorp Ab Process for production of pentaerythritol with an increased yield of di-pentaerythritol
CN112771014A (en) * 2018-09-28 2021-05-07 佩什托普公司 Process for the production of pentaerythritol with improved yield of dipentaerythritol
CN110878005A (en) * 2019-12-09 2020-03-13 赤峰瑞阳化工有限公司 Continuous condensation process of trimethylolpropane and ditrimethylolpropane
CN113956132A (en) * 2021-11-19 2022-01-21 吉林化工学院 Preparation method of trimethylpentanediol
CN113956132B (en) * 2021-11-19 2024-03-19 吉林化工学院 Preparation method of trimethylpentanediol

Also Published As

Publication number Publication date
BE585536A (en) 1960-04-01
DE1153739B (en) 1963-09-05

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