US998140A - Pentachlorobenzaldehyde. - Google Patents

Pentachlorobenzaldehyde. Download PDF

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Publication number
US998140A
US998140A US62042711A US1911620427A US998140A US 998140 A US998140 A US 998140A US 62042711 A US62042711 A US 62042711A US 1911620427 A US1911620427 A US 1911620427A US 998140 A US998140 A US 998140A
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Prior art keywords
pentachlorobenzaldehyde
germany
max
parts
pentachlorobenzalchlorid
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US62042711A
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Max Weiler
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Bayer AG
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Farbenfabriken Vorm Friedr Bayer and Co
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Priority to US62042711A priority Critical patent/US998140A/en
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C47/00—Compounds having —CHO groups
    • C07C47/52—Compounds having —CHO groups bound to carbon atoms of six—membered aromatic rings
    • C07C47/55—Compounds having —CHO groups bound to carbon atoms of six—membered aromatic rings containing halogen

Definitions

  • pentachlorobenzalchlorid (obtainable either by treating benzyl chlorid with chlorin or by treating pentachlorotohlene or pcntachlorobenzyl chlorid with chlorintcan be converted into the hitherto unknown pentachlorobenzaldehyde concentrated or fuming sulfuric acid.

Description

UNITED STATES PATENT OFFICE.
MAX WEILER, or ELBnriFELD, GERMANY, ASSIGNOR To FARBENFABRKEN vomvr.
FRIEDR. BAYER & 00., OF ELBERFELD, GERMANY, A CORPORATION OF GEEMANY.
PENTACHLOROBENZALDEHYDE.
No Drawing.
To all whom it may concern:
Be it known that I, MAX VVEILER, doctor of philosophy, chemist, citizen of the German Empire, residing at Elberfeld, Germany, have invented new and useful Improvements in Ientachlorobenzaldehyde, of which the following is a specification.
Lhave found that pentachlorobenzalchlorid (obtainable either by treating benzyl chlorid with chlorin or by treating pentachlorotohlene or pcntachlorobenzyl chlorid with chlorintcan be converted into the hitherto unknown pentachlorobenzaldehyde concentrated or fuming sulfuric acid.
In order to illustrate the new process more Specification of Letters Patent. Patented J uly' 18, 1911. Application filed April 11, 1911. Serial N0. 620,427.
I fully the following example is given, the
parts being by weightl:A mixture of 10 parts of pentachlorobenzalchlorid with 50 parts of concentrated sulfuric acid is stirred at about 00-100 C. until the evolution of hydrochloric acid ceases. The aldehyde is obtained in a pure state by pouring the mass of the reaction on ice. It is a white powder ,casily soluble in benzene but not so easily soluble in alcohol. It crystallizes in long needles melting at 197199 C.
I claim The herein described pentachlorobenzaldehydc being a white powder easily soluble in benzene and melting at l97199 (1., substantially as described.
In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses. v MAX WEILER. 1,. s.]
Witnesses:
ALFRED HENKEL, E. Voss.
US62042711A 1911-04-11 1911-04-11 Pentachlorobenzaldehyde. Expired - Lifetime US998140A (en)

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US62042711A US998140A (en) 1911-04-11 1911-04-11 Pentachlorobenzaldehyde.

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2692290A (en) * 1951-10-04 1954-10-19 Sprague Electric Co 2, 3, 4, 5, 6 pentachlorophenyl acetaldehyde
US3499934A (en) * 1967-02-01 1970-03-10 Diamond Shamrock Corp Trihalo triformyl benzenes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2692290A (en) * 1951-10-04 1954-10-19 Sprague Electric Co 2, 3, 4, 5, 6 pentachlorophenyl acetaldehyde
US3499934A (en) * 1967-02-01 1970-03-10 Diamond Shamrock Corp Trihalo triformyl benzenes

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