ES350433A1 - PROCESS FOR THE PREPARATION OF 4,4'DIMETHYL-1,3-DIOXANE FROM i-BUTENE AND FORMALDEHYDE - Google Patents

PROCESS FOR THE PREPARATION OF 4,4'DIMETHYL-1,3-DIOXANE FROM i-BUTENE AND FORMALDEHYDE

Info

Publication number
ES350433A1
ES350433A1 ES350433A ES350433A ES350433A1 ES 350433 A1 ES350433 A1 ES 350433A1 ES 350433 A ES350433 A ES 350433A ES 350433 A ES350433 A ES 350433A ES 350433 A1 ES350433 A1 ES 350433A1
Authority
ES
Spain
Prior art keywords
hydrocarbons
isobutene
separators
formaldehyde
series
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
ES350433A
Other languages
Spanish (es)
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.)
Bayer AG
Original Assignee
Bayer AG
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 Bayer AG filed Critical Bayer AG
Publication of ES350433A1 publication Critical patent/ES350433A1/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B01J31/06—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing polymers
    • B01J31/08—Ion-exchange resins
    • B01J31/10—Ion-exchange resins sulfonated
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D319/00—Heterocyclic compounds containing six-membered rings having two oxygen atoms as the only ring hetero atoms
    • C07D319/04—1,3-Dioxanes; Hydrogenated 1,3-dioxanes
    • C07D319/06—1,3-Dioxanes; Hydrogenated 1,3-dioxanes not condensed with other rings
    • 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
    • B01J2231/00—Catalytic reactions performed with catalysts classified in B01J31/00
    • B01J2231/30—Addition reactions at carbon centres, i.e. to either C-C or C-X multiple bonds
    • B01J2231/32—Addition reactions to C=C or C-C triple bonds
    • B01J2231/324—Cyclisations via conversion of C-C multiple to single or less multiple bonds, e.g. cycloadditions
    • B01J2231/328—Cycloadditions involving more than 2 components or moieties, e.g. intra-/intermolecualar [2+2+2] or [2+2+1], e.g. Pauson-Khand type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/582—Recycling of unreacted starting or intermediate materials

Landscapes

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

Abstract

A process for the preparation of 4,4-dimethyl- 1,3-dioxane from isobutene and aqueous formaldehyde in which the reaction is carried out in the liquid phase under superatmospheric pressure and at a temperature of 60 to 130 C. in the presence of sulphonic acid group containing cation exchangers based on cross-linked aromatic vinyl polymers comprises reacting the isobutene and aqueous formaldehyde together in a plurality of series connected, thoroughly stirred vessels, the molar ratio of isobutene to formaldehyde being in the range of from 0À5:1 to 3:1 and separating the reaction products in a separator situated between two successve vessels into a hydrocarbon layer and an aqueous layer including catalyst, in which the reactants are conducted through the series of reactors and the interposed separators and the hydrocarbon layer drawn off from the separators is separated by distillation into uncoverted hydrocarbons and into conversion products, and in which the hydrocarbons withdrawn from the separators are replaced by fresh or returned hydrocarbons, unreacted hydrocarbons driven off in the distillation being returned wholly or in part into the series of reactors.
ES350433A 1967-02-15 1968-02-13 PROCESS FOR THE PREPARATION OF 4,4'DIMETHYL-1,3-DIOXANE FROM i-BUTENE AND FORMALDEHYDE Expired ES350433A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF0051530 1967-02-15

Publications (1)

Publication Number Publication Date
ES350433A1 true ES350433A1 (en) 1969-04-16

Family

ID=7104687

Family Applications (1)

Application Number Title Priority Date Filing Date
ES350433A Expired ES350433A1 (en) 1967-02-15 1968-02-13 PROCESS FOR THE PREPARATION OF 4,4'DIMETHYL-1,3-DIOXANE FROM i-BUTENE AND FORMALDEHYDE

Country Status (7)

Country Link
AT (1) AT276394B (en)
BE (1) BE710776A (en)
DE (1) DE1593851A1 (en)
ES (1) ES350433A1 (en)
FR (1) FR1559883A (en)
GB (1) GB1217234A (en)
NL (1) NL6801888A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2433634C2 (en) * 1974-07-12 1982-07-08 Volžskij zavod sintetičeskogo kaučuka, Volžskij, Volgogradskaja oblast' Process for the preparation of 4,4-dimethyl-1,3-dioxane
FR2490643A1 (en) * 1980-09-19 1982-03-26 Breiman Olga Prodn. of 4,4-di:methyl-1,3-dioxan - from formaldehyde and isobutylene using alkyl or phenyl poly-sulphonic acid salt as catalyst
CN109761950B (en) * 2019-01-25 2020-11-03 浙江师范大学 Method for preparing 4, 4-dimethyl-1, 3-dioxane

Also Published As

Publication number Publication date
FR1559883A (en) 1969-03-14
DE1593851A1 (en) 1970-09-17
BE710776A (en) 1968-08-14
GB1217234A (en) 1970-12-31
AT276394B (en) 1969-11-25
NL6801888A (en) 1968-08-16

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