IL59502A0 - Purification of naphthalene - Google Patents

Purification of naphthalene

Info

Publication number
IL59502A0
IL59502A0 IL59502A IL5950280A IL59502A0 IL 59502 A0 IL59502 A0 IL 59502A0 IL 59502 A IL59502 A IL 59502A IL 5950280 A IL5950280 A IL 5950280A IL 59502 A0 IL59502 A0 IL 59502A0
Authority
IL
Israel
Prior art keywords
naphthalene
sulphuric acid
water
reaction
purification
Prior art date
Application number
IL59502A
Other versions
IL59502A (en
Original Assignee
Charbonnages Ste Chimique
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 Charbonnages Ste Chimique filed Critical Charbonnages Ste Chimique
Publication of IL59502A0 publication Critical patent/IL59502A0/en
Publication of IL59502A publication Critical patent/IL59502A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C309/00—Sulfonic acids; Halides, esters, or anhydrides thereof
    • 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
    • C07C7/148—Purification; Separation; Use of additives by treatment giving rise to a chemical modification of at least one compound
    • C07C7/14875—Purification; Separation; Use of additives by treatment giving rise to a chemical modification of at least one compound with organic compounds

Abstract

1. Process for the preparation of at least partially sulphonated naphthalene by the reaction of sulphuric acid with naphthalene, in the presence of a solvent forming an azeotrope with water, characterised in that the molar ratio sulphuric acid/naphthalene is less than 1 and in that the reaction of the sulphuric acid on the naphthalene is carried out between 90 and 150 degrees C thus totally eliminating water in a continuous manner from the reaction medium by azeotropic distillation by means of a solvent chosen from saturated aliphatic hydrocarbons, saturated cycloaliphatic hydrocarbons or their mixtures so that the product obtained is completely free from water and sulphuric acid.
IL59502A 1979-03-02 1980-02-29 Purification of naphthalene IL59502A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7905433A FR2450252A1 (en) 1979-03-02 1979-03-02 PROCESS FOR THE PREPARATION OF NAPHTHALENE SULPHONE AT LEAST IN PART AND APPLICATION OF THE PRODUCT OBTAINED IN THE PURIFICATION OF NAPHTHALENE

Publications (2)

Publication Number Publication Date
IL59502A0 true IL59502A0 (en) 1980-05-30
IL59502A IL59502A (en) 1984-12-31

Family

ID=9222675

Family Applications (1)

Application Number Title Priority Date Filing Date
IL59502A IL59502A (en) 1979-03-02 1980-02-29 Purification of naphthalene

Country Status (6)

Country Link
EP (1) EP0015831B1 (en)
AT (1) ATE510T1 (en)
DE (1) DE3060122D1 (en)
ES (1) ES488965A1 (en)
FR (1) FR2450252A1 (en)
IL (1) IL59502A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108822006A (en) * 2018-05-31 2018-11-16 山西豪仑科化工有限公司 A kind of naphthalene sulfonation continuous reaction process

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB760054A (en) * 1954-03-29 1956-10-31 Yorkshire Tar Distillers Ltd Purification of naphthalene
US2955144A (en) * 1958-06-18 1960-10-04 American Cyanamid Co Process for refining naphthalene
FR1300453A (en) * 1961-09-09 1962-08-03 Allied Chem Production of naphthalene sulfonic acid
BE659662A (en) * 1963-03-07
US3550172A (en) * 1968-01-03 1970-12-29 Usm Corp Fastener manufacture
GB1371232A (en) * 1972-03-09 1974-10-23 Midland Yorkshire Holdings Ltd Purification of naphthalene
JPS4933192A (en) * 1972-07-29 1974-03-27
DE2432066A1 (en) * 1974-07-04 1976-01-15 Ruetgerswerke Ag PROCESS FOR OBTAINING PURE NAPHTHALIN OR FROM ITS PURE HOMOLOGOUS

Also Published As

Publication number Publication date
EP0015831A1 (en) 1980-09-17
FR2450252A1 (en) 1980-09-26
ES488965A1 (en) 1980-09-16
FR2450252B1 (en) 1983-03-25
IL59502A (en) 1984-12-31
DE3060122D1 (en) 1982-02-18
EP0015831B1 (en) 1981-12-30
ATE510T1 (en) 1982-01-15

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