ES394480A1 - Process for the preparation of isoprene with a high degree of purity - Google Patents

Process for the preparation of isoprene with a high degree of purity

Info

Publication number
ES394480A1
ES394480A1 ES394480A ES394480A ES394480A1 ES 394480 A1 ES394480 A1 ES 394480A1 ES 394480 A ES394480 A ES 394480A ES 394480 A ES394480 A ES 394480A ES 394480 A1 ES394480 A1 ES 394480A1
Authority
ES
Spain
Prior art keywords
reactor
dioxane
dimethyl
phosphates
isoprene
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
ES394480A
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 ES394480A1 publication Critical patent/ES394480A1/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
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
    • B01J8/24—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique
    • B01J8/26—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique with two or more fluidised beds, e.g. reactor and regeneration installations
    • B01J8/28—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique with two or more fluidised beds, e.g. reactor and regeneration installations the one above the other
    • 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
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/02—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
    • B01J8/0242—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds the fluid flow within the bed being predominantly vertical
    • B01J8/025—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds the fluid flow within the bed being predominantly vertical in a cylindrical shaped bed
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C1/00—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon
    • C07C1/20—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as heteroatoms
    • C07C1/247—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as heteroatoms by splitting of cyclic ethers
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2527/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
    • C07C2527/14—Phosphorus; Compounds thereof
    • C07C2527/16—Phosphorus; Compounds thereof containing oxygen
    • C07C2527/167—Phosphates or other compounds comprising the anion (PnO3n+1)(n+2)-
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2527/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
    • C07C2527/14—Phosphorus; Compounds thereof
    • C07C2527/16—Phosphorus; Compounds thereof containing oxygen
    • C07C2527/167—Phosphates or other compounds comprising the anion (PnO3n+1)(n+2)-
    • C07C2527/173—Phosphoric acid or other acids with the formula Hn+2PnO3n+1
    • 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
    • Y02P20/584—Recycling of catalysts

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Catalysts (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)

Abstract

Process for the production of highly pure isoprene by cleavage of 4,4-dimethyl-1,3-dioxane in the presence of catalysts containing phosphoric acid or phosphates at an elevated temperature, characterized in that a catalyst containing conducted phosphoric acid or acid phosphates is introduced in continuous circulation between a regenerator and a two-stage reactor, to supply the necessary heat, between 500 and 700ºC in a first stage of the reactor, where it is kept with steam in a fluidized state and mixed, respectively, with It cools with the catalyst already present in the reactor to the split temperature of 200 to 400ºC and subsequently raw 4} 4-dimethyl-m-dioxane is introduced into the second fluidized bed zone above the first one. (Machine-translation by Google Translate, not legally binding)
ES394480A 1970-08-25 1971-08-24 Process for the preparation of isoprene with a high degree of purity Expired ES394480A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702042055 DE2042055A1 (en) 1970-08-25 1970-08-25 Process for the production of high purity isoprene

Publications (1)

Publication Number Publication Date
ES394480A1 true ES394480A1 (en) 1974-02-16

Family

ID=5780643

Family Applications (1)

Application Number Title Priority Date Filing Date
ES394480A Expired ES394480A1 (en) 1970-08-25 1971-08-24 Process for the preparation of isoprene with a high degree of purity

Country Status (13)

Country Link
JP (1) JPS5215563B1 (en)
AT (1) AT310133B (en)
AU (1) AU3246871A (en)
BE (1) BE771760A (en)
BR (1) BR7105512D0 (en)
CA (1) CA965802A (en)
DE (1) DE2042055A1 (en)
ES (1) ES394480A1 (en)
FR (1) FR2106044A5 (en)
GB (2) GB1372385A (en)
NL (1) NL7111629A (en)
SU (1) SU458123A3 (en)
ZA (1) ZA715636B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2196846A1 (en) * 1972-08-22 1974-03-22 Inst Neftechimichesk Cleaving C-O bonds using phosphate catalyst - thermally passivated for higher selectivity
RU2365574C1 (en) * 2008-03-17 2009-08-27 Общество с ограниченной ответственностью "Еврохим-СПб-Трейдинг" Method of processing by-products of liquid-phase synthesis of isoprene from isobutylene and formaldehyde
DE102017207457B4 (en) * 2017-05-04 2021-11-11 Technische Universität Bergakademie Freiberg Process for the preparation of catalysts from silicate-phosphate materials with the production of phosphoric acid

Also Published As

Publication number Publication date
DE2042055A1 (en) 1972-03-02
BE771760A (en) 1972-02-25
BR7105512D0 (en) 1973-05-08
GB1372386A (en) 1974-10-30
CA965802A (en) 1975-04-08
FR2106044A5 (en) 1972-04-28
AT310133B (en) 1973-09-25
GB1372385A (en) 1974-10-30
ZA715636B (en) 1972-04-26
SU458123A3 (en) 1975-01-25
JPS5215563B1 (en) 1977-04-30
AU3246871A (en) 1973-02-22
NL7111629A (en) 1972-02-29

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