GB1497970A - Process for the preparation of propylene oxide - Google Patents

Process for the preparation of propylene oxide

Info

Publication number
GB1497970A
GB1497970A GB4462276A GB4462276A GB1497970A GB 1497970 A GB1497970 A GB 1497970A GB 4462276 A GB4462276 A GB 4462276A GB 4462276 A GB4462276 A GB 4462276A GB 1497970 A GB1497970 A GB 1497970A
Authority
GB
United Kingdom
Prior art keywords
hydrogen peroxide
propionic acid
reconcentrated
raffinate
acid
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
GB4462276A
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
Evonik Operations GmbH
Original Assignee
Bayer AG
Degussa GmbH
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, Degussa GmbH filed Critical Bayer AG
Publication of GB1497970A publication Critical patent/GB1497970A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D301/00—Preparation of oxiranes
    • C07D301/02—Synthesis of the oxirane ring
    • C07D301/03—Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds
    • C07D301/14—Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds with organic peracids, or salts, anhydrides or esters thereof
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C407/00—Preparation of peroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C407/00—Preparation of peroxy compounds
    • C07C407/003—Separation; Purification; Stabilisation; Use of additives
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C409/00—Peroxy compounds
    • C07C409/24—Peroxy compounds the —O—O— group being bound between a >C=O group and hydrogen, i.e. peroxy acids

Landscapes

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

Abstract

1497970 Preparation of propylene oxide BAYER AG and DEUTSCHE GOLDUND SILBER - SCHEIDEANSTALT 27 Oct 1976 [24 July 1976] 44622/76 Heading C2C The invention comprises a process for the continuous preparation of propylene oxide from propylene and aqueous hydrogen peroxide wherein (a) an aqueous solution containing 10 to 45% by weight of a water-soluble acid catalyst and 20 to 35% by weight of hydrogen peroxide is reacted with propionic acid in a molar ratio of hydrogen peroxide: propionic acid of 0À8 to 1À5 : 1 or 3À5 to 5 : 1 at a temperature of from 10‹ to 70‹ C., (b) the resulting reaction mixture is extracted with benzene in countercurrent, (c) all or part of the aqueous raffinate from the extraction, which contains in the main hydrogen peroxide and acid catalyst, is reconcentrated by removing water by distillation, (d) the reconcentrated raffinate and the part of the raffinate which has optionally not been reconcentrated are recycled into the reaction stage (a), the concentrations of hydrogen peroxide and water-soluble acid catalyst being made up to those required for the reaction with propionic acid by adding the hydrogen peroxide required to restore the hydrogen peroxide concentration to that required for the reaction with propionic acid to the part of the raffinate which is to be reconcentrated, before or after removal of water by distillation according to (c), or to the part of the raffinate which is optionally not reconcentrated, (e) the benzene extract, which contains in the main perpropionic acid and propionic acid, is treated with water or an aqueous solution, (f) the solution, containing perpropionic acid and propionic acid, which is now obtained is reacted with excess propylene at a molar ratio of propylene to perpropionic acid of 1À2 to 6 : 1 at a temperature of from 50‹ to 90‹ C. and at a pressure of from 2 to 20 bars, and (g) the reaction mixture, containing propylene oxide, is worked up in a manner which is in itself known, pure propylene oxide being isolated and the excess propylene, the propionic acid and the benzene being recovered and the whole or part of these recovered products being recycled into the process.
GB4462276A 1976-07-24 1976-10-27 Process for the preparation of propylene oxide Expired GB1497970A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762633395 DE2633395A1 (en) 1976-07-24 1976-07-24 PROCESS FOR MANUFACTURING PROPYLENE OXIDE

Publications (1)

Publication Number Publication Date
GB1497970A true GB1497970A (en) 1978-01-12

Family

ID=5983870

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4462276A Expired GB1497970A (en) 1976-07-24 1976-10-27 Process for the preparation of propylene oxide

Country Status (9)

Country Link
JP (1) JPS5938951B2 (en)
BE (1) BE847664A (en)
CA (1) CA1097367A (en)
DD (1) DD127889A5 (en)
DE (1) DE2633395A1 (en)
FR (1) FR2359132A1 (en)
GB (1) GB1497970A (en)
IT (1) IT1066752B (en)
NL (1) NL7611892A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061393A1 (en) * 1981-03-24 1982-09-29 Elf Atochem S.A. Continuous process for the preparation of propylene oxide
EP0090239A1 (en) * 1982-03-26 1983-10-05 Bayer Ag Process for the preparation of 2,2-bis-(3-cyclohexenyl)-propane diepoxide

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63154369U (en) * 1987-03-31 1988-10-11
EP0574090A1 (en) * 1992-06-12 1993-12-15 Eastman Kodak Company One equivalent couplers and low pKa release dyes
CN103172486B (en) * 2011-12-22 2015-07-29 中国石油化工股份有限公司 A kind of method of Propylene recovery from Direct Epoxidation reaction product

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061393A1 (en) * 1981-03-24 1982-09-29 Elf Atochem S.A. Continuous process for the preparation of propylene oxide
FR2502620A1 (en) * 1981-03-24 1982-10-01 Ugine Kuhlmann CONTINUOUS PROCESS FOR THE PREPARATION OF PROPYLENE OXIDE
EP0090239A1 (en) * 1982-03-26 1983-10-05 Bayer Ag Process for the preparation of 2,2-bis-(3-cyclohexenyl)-propane diepoxide

Also Published As

Publication number Publication date
DE2633395A1 (en) 1978-02-02
JPS5938951B2 (en) 1984-09-20
JPS5315304A (en) 1978-02-13
CA1097367A (en) 1981-03-10
BE847664A (en) 1977-04-27
NL7611892A (en) 1978-01-26
DD127889A5 (en) 1977-10-19
IT1066752B (en) 1985-03-12
FR2359132B1 (en) 1981-07-10
FR2359132A1 (en) 1978-02-17

Similar Documents

Publication Publication Date Title
GB1489856A (en) Process for the preparation of propylene oxide
GB1488773A (en) Process for the preparation of propylene oxide
PH30804A (en) Method to produce cyclic esters.
US4044108A (en) Process for removing organic material from wet process phosphoric acid
US3996295A (en) Preparation of dimethylsulfoxide by liquid phase reaction of dimethysulfide and hydrogen peroxide
GB1497970A (en) Process for the preparation of propylene oxide
ES447424A1 (en) Process for the preparation of percarboxylic acid solutions
JPS54157529A (en) Recovery of resorcinol
US4200620A (en) Decontamination of wet-processed phosphoric acid
JPS6052733B2 (en) Hydroquinone production method
US3773838A (en) Method of preparing dimethylsulphoxide
US4591460A (en) Process for the decomposition of a complex of orthobenzoyl-benzoic acid, hydrogen fluoride and boron trifluoride
JPS6050171B2 (en) Manufacturing method of resorcinol
ES434949A1 (en) Process for producing ethylphenols
ZA839284B (en) Process for purifying wet-processed phosphoric acid
US3809769A (en) Method of extracting tea
US3595898A (en) Peresters by reaction of carboxylic acids with organic hydroperoxides
US1870214A (en) Purification of aluminum chloride solutions
ES447407A1 (en) Process for the continuous preparation of percarboxylic acids in organic solutions
JPS5955842A (en) Rearrangement of dialkylbenzene dihydroperoxide to dihydric phenol
US2354512A (en) Treatment of vinyl type halides
GB998324A (en) Improvements in and relating to the separation and concentration of hydrogen peroxide produced in the anthraquinone process
ES470068A1 (en) Process for purifying phosphoric acid
SU137917A1 (en) The method of obtaining 1, 1, 2, 2- tetrafluoroethyl-di (hydroxymethyl) phosphine oxide
US3708509A (en) Process for preparing benzoquinone

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee