GB987098A - Producing and recovering para- and ortho-xylenes - Google Patents

Producing and recovering para- and ortho-xylenes

Info

Publication number
GB987098A
GB987098A GB2189161A GB2189161A GB987098A GB 987098 A GB987098 A GB 987098A GB 2189161 A GB2189161 A GB 2189161A GB 2189161 A GB2189161 A GB 2189161A GB 987098 A GB987098 A GB 987098A
Authority
GB
United Kingdom
Prior art keywords
xylene
crystallization
para
ortho
xylenes
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
GB2189161A
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.)
Halcon International Inc
Original Assignee
Halcon International Inc
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 Halcon International Inc filed Critical Halcon International Inc
Publication of GB987098A publication Critical patent/GB987098A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C15/00—Cyclic hydrocarbons containing only six-membered aromatic rings as cyclic parts
    • C07C15/02—Monocyclic hydrocarbons
    • C07C15/067—C8H10 hydrocarbons
    • C07C15/08—Xylenes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0059—General arrangements of crystallisation plant, e.g. flow sheets
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C7/00—Purification; Separation; Use of additives
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C7/00—Purification; Separation; Use of additives
    • C07C7/005—Processes comprising at least two steps in series
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C7/00—Purification; Separation; Use of additives
    • C07C7/04—Purification; Separation; Use of additives by distillation
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C7/00—Purification; Separation; Use of additives
    • C07C7/14—Purification; Separation; Use of additives by crystallisation; Purification or separation of the crystals

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Water Supply & Treatment (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

<PICT:0987098/C4-C5/1> Para- and ortho-xylenes are obtained by passing a xylene mixture to a crystallization zone where para-xylene is recovered, passing the residue to an isomerization zone, the effluent from which is distilled to obtain (a) a light ends fraction, (b) a mixed xylenes fraction which is passed to the crystallization step and (c) bottoms which are separately fractionated to recover ortho-xylene; fresh xylene feed may be introduced to the crystallization or the distillation step. Crystallization is effected in cooler 14 at 5 DEG to - 70 DEG C. and para-xylene separated in zone 18. The residue is mixed with hydrogen and isomerized in reactor 24 with platinum-alumina-silica at 425-500 DEG C., 150-200 p.s.i.g. with 5-10 vols. hydrogen per vol. of hydrocarbon vapour. The effluent is condensed and passed to column 38 from which the bottoms are fractionated in column 42 to obtain orthoxylene overhead and the overhead is fractionated in column 50 to separate light ends from the xylene recycle.
GB2189161A 1960-06-17 1961-06-16 Producing and recovering para- and ortho-xylenes Expired GB987098A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3681060A 1960-06-17 1960-06-17

Publications (1)

Publication Number Publication Date
GB987098A true GB987098A (en) 1965-03-24

Family

ID=21890778

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2189161A Expired GB987098A (en) 1960-06-17 1961-06-16 Producing and recovering para- and ortho-xylenes

Country Status (6)

Country Link
BE (1) BE604913A (en)
CH (1) CH405256A (en)
DE (1) DE1443105A1 (en)
ES (1) ES268290A1 (en)
GB (1) GB987098A (en)
NL (1) NL266017A (en)

Also Published As

Publication number Publication date
ES268290A1 (en) 1961-11-16
BE604913A (en)
CH405256A (en) 1966-01-15
DE1443105A1 (en) 1968-10-24
NL266017A (en)

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