FR2114772A5 - - Google Patents

Info

Publication number
FR2114772A5
FR2114772A5 FR7141031A FR7141031A FR2114772A5 FR 2114772 A5 FR2114772 A5 FR 2114772A5 FR 7141031 A FR7141031 A FR 7141031A FR 7141031 A FR7141031 A FR 7141031A FR 2114772 A5 FR2114772 A5 FR 2114772A5
Authority
FR
France
Prior art keywords
compound
mixture
melt
water
crystallizing
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
FR7141031A
Other languages
English (en)
French (fr)
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.)
Monsanto Co
Original Assignee
Monsanto Co
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 Monsanto Co filed Critical Monsanto Co
Application granted granted Critical
Publication of FR2114772A5 publication Critical patent/FR2114772A5/fr
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C201/00—Preparation of esters of nitric or nitrous acid or of compounds containing nitro or nitroso groups bound to a carbon skeleton
    • C07C201/06—Preparation of nitro compounds
    • C07C201/16—Separation; Purification; Stabilisation; Use of additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0004—Crystallisation cooling by heat exchange
    • B01D9/0009—Crystallisation cooling by heat exchange by direct heat exchange with added cooling fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/005—Selection of auxiliary, e.g. for control of crystallisation nuclei, of crystal growth, of adherence to walls; Arrangements for introduction thereof
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C205/00—Compounds containing nitro groups bound to a carbon skeleton
    • C07C205/07—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by halogen atoms
    • C07C205/11—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by halogen atoms having nitro groups bound to carbon atoms of six-membered aromatic rings
    • C07C205/12—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by halogen atoms having nitro groups bound to carbon atoms of six-membered aromatic rings the six-membered aromatic ring or a condensed ring system containing that ring being substituted by halogen atoms
    • 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)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
FR7141031A 1970-11-17 1971-11-16 Expired FR2114772A5 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US9047670A 1970-11-17 1970-11-17

Publications (1)

Publication Number Publication Date
FR2114772A5 true FR2114772A5 (de) 1972-06-30

Family

ID=22222934

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7141031A Expired FR2114772A5 (de) 1970-11-17 1971-11-16

Country Status (5)

Country Link
BE (1) BE775337A (de)
CA (1) CA952424A (de)
DE (1) DE2156880A1 (de)
FR (1) FR2114772A5 (de)
GB (1) GB1319870A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988005766A1 (en) * 1987-02-06 1988-08-11 Krupp Koppers Gmbh PROCESS FOR PRODUCING p-XYLOL WITH A PURITY OF AT LEAST 99.5 %
EP0340487A2 (de) * 1988-05-05 1989-11-08 Krupp Koppers GmbH Verfahren zur Gewinnung von p-Xylol mit einer Reinheit von mindestens 99,5 %

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113845506B (zh) 2021-10-18 2022-09-23 惠州市宙邦化工有限公司 一种碳酸乙烯酯的动态结晶提纯方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988005766A1 (en) * 1987-02-06 1988-08-11 Krupp Koppers Gmbh PROCESS FOR PRODUCING p-XYLOL WITH A PURITY OF AT LEAST 99.5 %
EP0340487A2 (de) * 1988-05-05 1989-11-08 Krupp Koppers GmbH Verfahren zur Gewinnung von p-Xylol mit einer Reinheit von mindestens 99,5 %
EP0340487A3 (en) * 1988-05-05 1989-12-06 Krupp Koppers Gmbh Process for the recovery of p-xylene with a purity of at least 99,5%

Also Published As

Publication number Publication date
DE2156880A1 (de) 1972-05-25
GB1319870A (en) 1973-06-13
BE775337A (fr) 1972-05-16
CA952424A (en) 1974-08-06

Similar Documents

Publication Publication Date Title
US2588449A (en) Levulose dihydrate
FR2114772A5 (de)
GB1010840A (en) A process of recovering alkali metal dithionite from a solution thereof by cooling and crystallizing
GB1246277A (en) Improvements in the crystallisation of substances
GB1381724A (en) Separation process
GB1149322A (en) An improved process for purifying 4,4'-isopropylidenediphenol
ES435492A1 (es) Procedimiento para separar paraxileno de una mezcla normal- mente liquida de isomeros de xileno y aromaticos c 8grados.
GB1389856A (en) Crystallisation of fructose
GB1274798A (en) A process for preparing 2,2-di(4-hydroxyphenyl) propane of a high degree of purity
GB912783A (en) Separation by crystallization
GB1436779A (en) Process for separating resorcinol from hydroquinone
GB1208364A (en) Purification process involving two crystallization stages for separating paraxylene from an aromatic hydrocarbon fraction
US2982616A (en) Method of producing calcium-free crystalline cyanamide
GB1236081A (en) Method of crystallization
GB1277282A (en) A process for the purification of 4,4-dihydroxy-diphenyl-2,2-propane or the phenol adduct thereof
GB1461836A (en) Process for optical resolution of racemic lysine sulphanilate
ES433589A1 (es) Un metodo para cristalizar fructosa en una solucion acuosa de la misma que contiene glucosa como impureza.
GB1413032A (en) Aqueous crystallization of sylitol
GB1249783A (en) Concentration of aqueous acetic acid
SU407878A1 (ru) Способ очистки бифталата калия
GB1414215A (en) Recovery of meta-xylene by selective crystallization
SU137112A1 (ru) Способ извлечени четырех бромистого углерода из сырца
GB1177856A (en) Process for Resolution of Optical Isomers or Racemic Ammonium Pantoate by Preferential Crystallization
GB1172180A (en) A Process for Improving the Purity of Inorganic or Organic Crystalline Products
SU421355A1 (ru) Способ выращивания монокристаллов бифталата калия

Legal Events

Date Code Title Description
ST Notification of lapse