GB973901A - Improvements in and relating to preparing cyclic di-p-xylylene - Google Patents

Improvements in and relating to preparing cyclic di-p-xylylene

Info

Publication number
GB973901A
GB973901A GB27189/61A GB2718961A GB973901A GB 973901 A GB973901 A GB 973901A GB 27189/61 A GB27189/61 A GB 27189/61A GB 2718961 A GB2718961 A GB 2718961A GB 973901 A GB973901 A GB 973901A
Authority
GB
United Kingdom
Prior art keywords
xylene
diradical
xylylene
product
pyrolysis
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
GB27189/61A
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.)
Union Carbide Corp
Original Assignee
Union Carbide Corp
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 Union Carbide Corp filed Critical Union Carbide Corp
Publication of GB973901A publication Critical patent/GB973901A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C13/00—Cyclic hydrocarbons containing rings other than, or in addition to, six-membered aromatic rings
    • C07C13/28—Polycyclic hydrocarbons or acyclic hydrocarbon derivatives thereof
    • C07C13/32—Polycyclic hydrocarbons or acyclic hydrocarbon derivatives thereof with condensed rings
    • C07C13/70—Polycyclic hydrocarbons or acyclic hydrocarbon derivatives thereof with condensed rings with a condensed ring system consisting of at least two, mutually uncondensed aromatic ring systems, linked by an annular structure formed by carbon chains on non-adjacent positions of the aromatic ring, e.g. cyclophanes
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
    • C07C2/76—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation of hydrocarbons with partial elimination of hydrogen
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2603/00—Systems containing at least three condensed rings
    • C07C2603/92—Systems containing at least three condensed rings with a condensed ring system consisting of at least two mutually uncondensed aromatic ring systems, linked by an annular structure formed by carbon chains on non-adjacent positions of the aromatic system, e.g. cyclophanes
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S585/00—Chemistry of hydrocarbon compounds
    • Y10S585/929—Special chemical considerations
    • Y10S585/942—Production of carbonium ion or hydrocarbon free-radical

Landscapes

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

Abstract

Cyclic di-p-xylylene is obtained by pyrolyzing p-xylene at 800-1000 DEG C. to generate the reactive diradical <FORM:0973901/C4-C5/1> and condensing the diradical in a fluid containing an inert organic solvent for the product at at least 50 DEG C. The xylene is preferably at a pressure of 0.1-20 mm. Hg obtained by reducing the pressure or adding a diluent, e.g. 50-200 moles of steam per mole of xylene. The pyrolysis contact time may be 0.01-1 second. The effluent is cooled to 150-400 DEG C. but above the ceiling condensation temperature of the diradical and then mixed with the vaporous or liquid solvent boiling in the range 50-350 DEG C. which is preferably p-xylene but may also be o- or m-xylene, toluene, cumene, benzene, methylnaphthalene, o-dichlorobenzene, acetic acid, 1,2 - di - p - tolylethane, mineral oil, diphenylmethane, heptane or decahydronaphthalene. The solvent is maintained at 50-250 DEG C. The product is recovered by distillation or crystallization and unconverted p-xylene and other condensation products may be recycled to the pyrolysis.
GB27189/61A 1960-08-22 1961-07-27 Improvements in and relating to preparing cyclic di-p-xylylene Expired GB973901A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US53574A US3149175A (en) 1960-08-22 1960-08-22 Preparation of di-para-xylylenes

Publications (1)

Publication Number Publication Date
GB973901A true GB973901A (en) 1964-11-04

Family

ID=21985191

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27189/61A Expired GB973901A (en) 1960-08-22 1961-07-27 Improvements in and relating to preparing cyclic di-p-xylylene

Country Status (2)

Country Link
US (1) US3149175A (en)
GB (1) GB973901A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3311668A (en) * 1964-03-26 1967-03-28 Union Carbide Corp High temperature process
US3271470A (en) * 1964-06-22 1966-09-06 Union Carbide Corp Dimerization method
US3247274A (en) * 1964-07-09 1966-04-19 Union Carbide Corp Preparation of di-para-xylylenes
US3280202A (en) * 1964-07-09 1966-10-18 Union Carbide Corp Process for producing p-xylylene-containing compositions
US3271471A (en) * 1965-03-23 1966-09-06 Union Carbide Corp Dimerization process
US3440295A (en) * 1966-12-27 1969-04-22 Union Carbide Corp Para-xylene preparation using hydrogen scavenger
US3504048A (en) * 1968-04-05 1970-03-31 Universal Oil Prod Co Hydrocarbon separation process
WO1990002546A1 (en) * 1988-09-09 1990-03-22 The Ronald T. Dodge Company Pharmaceuticals microencapsulated by vapor deposited polymers and method
EP0554675A1 (en) * 1992-01-31 1993-08-11 Hoechst Aktiengesellschaft Process for the preparation of para-xylylene polymers and derivatives thereof
US6030381A (en) * 1994-03-18 2000-02-29 Medicor Corporation Composite dielectric coating for electrosurgical implements
US8633289B2 (en) * 2011-08-31 2014-01-21 Carver Scientific, Inc. Formation of [2,2]paracyclophane and related compounds and methods for the formation of polymers from cyclophanes

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB740886A (en) * 1951-08-29 1955-11-23 Petrocarbon Ltd Improvements in or relating to the production of polymers from aromatic compounds
US2719131A (en) * 1953-05-15 1955-09-27 Du Pont Production of p-xylene polymers

Also Published As

Publication number Publication date
US3149175A (en) 1964-09-15

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