ES316784A2 - A procedure for continuous recovery of p-xylene apparate from liquid mixtures contain p-xylene. (Machine-translation by Google Translate, not legally binding) - Google Patents

A procedure for continuous recovery of p-xylene apparate from liquid mixtures contain p-xylene. (Machine-translation by Google Translate, not legally binding)

Info

Publication number
ES316784A2
ES316784A2 ES0316784A ES316784A ES316784A2 ES 316784 A2 ES316784 A2 ES 316784A2 ES 0316784 A ES0316784 A ES 0316784A ES 316784 A ES316784 A ES 316784A ES 316784 A2 ES316784 A2 ES 316784A2
Authority
ES
Spain
Prior art keywords
xylene
crystals
liquid
washing
suspension
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
ES0316784A
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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
Priority to US39245264A priority Critical
Application filed by Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Publication of ES316784A2 publication Critical patent/ES316784A2/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D9/00Crystallisation
    • B01D9/0004Crystallisation cooling by heat exchange
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D9/00Crystallisation
    • B01D9/004Fractional crystallisation; Fractionating or rectifying columns
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D9/00Crystallisation
    • B01D9/0059General arrangements of crystallisation plant, e.g. flow sheets
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C7/00Purification; Separation; Use of additives
    • C07C7/14Purification; Separation; Use of additives by crystallisation; Purification or separation of the crystals

Abstract

Improvements introduced in the object of the main patent No. 306,649, issued on February 22, 1965, by: "A procedure for the continuous recovery of p-xylene from liquid mixtures containing p-xylene", characterized in that a) a liquid containing from 9 to 98% by weight of p-xylene, in admixture with compounds having a lower melting point than p-xylene, is subjected to a temperature sufficient to form a suspension comprising a phase of crystals consisting of p-xylene, and a liquid phase comprising the remaining components of the feed and some p-xylene; b) said suspension is divided into a liquid part, which substantially does not contain crystals, and a part of crystals comprising crystals and some residual contaminating liquid; c) a part comprising p-xylene crystals is introduced into a wash zone; d) in said wash zone a washing liquid is introduced, in countercurrent with the flow of said crystals; e) said crystals, as separate and independent particles, are intimately contacted with said washing liquid, according to a toroidal flow scheme; and f) from said wash zone a liquid comprising washing liquid and, independently, a p-xylene product of high purity is recovered; the improvement consisting in that: g) said part of crystals comprising p-xylene crystals and some residual contaminating liquid, obtained in step b), is subjected to a temperature sufficient to melt substantially all the crystals; h) the liquid thus obtained is introduced at an intermediate point in said washing zone, as washing liquid, in countercurrent with the flow of said crystals; i) from said wash zone a washing stream is removed, which is subjected to a temperature sufficient to form a second suspension comprising p-xylene crystals and residual contaminating liquid; and j) the crystal suspension thus obtained is introduced into said washing zone. (Machine-translation by Google Translate, not legally binding)
ES0316784A 1964-08-27 1965-08-25 A procedure for continuous recovery of p-xylene apparate from liquid mixtures contain p-xylene. (Machine-translation by Google Translate, not legally binding) Expired ES316784A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US39245264A true 1964-08-27 1964-08-27

Publications (1)

Publication Number Publication Date
ES316784A2 true ES316784A2 (en) 1965-12-01

Family

ID=23550654

Family Applications (1)

Application Number Title Priority Date Filing Date
ES0316784A Expired ES316784A2 (en) 1964-08-27 1965-08-25 A procedure for continuous recovery of p-xylene apparate from liquid mixtures contain p-xylene. (Machine-translation by Google Translate, not legally binding)

Country Status (2)

Country Link
DE (1) DE1493085A1 (en)
ES (1) ES316784A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0556161B2 (en) * 1986-04-15 1993-08-18 Kureha Chemical Ind Co Ltd
GB8624266D0 (en) * 1986-10-09 1986-11-12 Ici Plc Separation process

Also Published As

Publication number Publication date
DE1493085A1 (en) 1968-12-19

Similar Documents

Publication Publication Date Title
MY115212A (en) Production of para-xylene from an effluent from paraselective toluene disproportionation using a crystallization process combined with simulated moving bed adsorption
FR1262906A (en) Preparing images inverted according to the electrophotographic method
GB1104497A (en) Recovery of spent etchants
JPS5517309A (en) Preparation of high purity terephthalic acid
MX9705380A (en) Method for producing para-xylene by high-temperature crystallisation in at least one stage and partial crystal fusion.
US1940065A (en) Separatrion and purification of ortho, meta and para xylene
GB1007095A (en) Process for the recovery of paraxylene
ES8503963A1 (en) Countercurrent, cooling crystallization and purification method for multi-component molten mixture.
DE1138481B (en) A process for the production of semiconductor devices through deposition of monocrystalline semiconductor material from the gaseous phase
CH437225A (en) A process for preparing compounds in crystalline form, and mixed crystals by melting together the components
US2622115A (en) Separation of eutectic-forming mixtures by crystallization methods
ES309519A1 (en) Procedure of homogenization of a flowed glass current. (Machine-translation by Google Translate, not legally binding)
GB1065725A (en) Purification of adipodinitrile
CH380085A (en) A method for pulling semiconductor rods from the melt and crucible apparatus for performing the method
DE1105087B (en) mixtures hydrocarbon process for refining of technical
DK133333B (en) Process for the separation of p-xylene from a carbonhydridfodeblanding containing mixtures of aromatic isomers with 8 carbon atoms
OA00863A (en) Process for recovering purified aluminum from granular metal containing aluminum.
FR1155185A (en) Apparatus for stretching crystals formed from a melt of compounds comprising very volatile components
FR1394471A (en) Improvements to processes for the preparation of herbicidal benzene polycarboxylic high purity
US2381995A (en) Production of anhydrous magnesium chloride
FR1204724A (en) A process for obtaining very pure elements of the fourth group of the Periodic Table
CH380384A (en) Means for floating zone melting of vertically standing rods of semiconductor material
DE2450817A1 (en) Temperature gradient zone melting process for the production of semiconductor devices
FR1245119A (en) Process for preparing purified semiconductor material
GB1100426A (en) Process and apparatus for the continuous separation of crystallisable substances

Legal Events

Date Code Title Description
FD2A Announcement of lapse in spain

Effective date: 20170628