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
GB21876/24A
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.)
Hoechst AG
Original Assignee
Hoechst AG
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 Hoechst AGfiledCriticalHoechst AG
Publication of GB222125ApublicationCriticalpatent/GB222125A/en
The process of the parent Specification, according to which benzanthrone or its substitution products not substituted in the 11-position are condensed with aromatic acid chlorides, is applied to benzanthrones substituted in the 11-position (now designated in the 2-position). According to an example, dyestuffs dyeing cotton in yellow shades from a red vat are prepared by heating 2-methylbenzanthrone (of M.Pt. 199 DEG C.) or 2-chlorbenzanthrone (obtained from 2-chloranthraquinone by the usual methods) with benzoyl chloride, aluminium chloride and zinc chloride.
GB21876/24A1923-09-181924-09-16Manufacture of condensation products of the anthraquinone series
ExpiredGB222125A
(en)