发明名称 Improvements in and relating to dyestuff intermediates
摘要 Nitro- and amino-dichlorbenzoyl benzoic acids are obtained by nitrating 31 : 41 dichlor-2-benzoyl benzoic acid made by condensing o-dichlorbenzene with phthalic anhydride in the presence of aluminium chloride, and reducing the nitro-products. Examples are given in which nitration is performed with 97 per cent nitric acid, or a mixture of nitric and sulphuric acids, and reduction with ammonia and ferrous sulphate, or iron pin dust and sodium chloride.
申请公布号 GB345277(A) 申请公布日期 1931.03.13
申请号 GB19290027904 申请日期 1929.09.13
申请人 RHYS JENKIN LOVELUCK;JOHN THOMAS;SCOTTISH DYES LIMITED 发明人
分类号 C07C205/61 主分类号 C07C205/61
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