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US 6,531,637 B1Granted
Resorcinol production from the hydrolysis of meta-phenylenediamine
AssigneeIndspec Chemical Corporation
InventorsRaj B. Durairaj, Gary A. Jesionowski
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Abstract
A process for the preparation of resorcinol using the meta-phenylenediamine hydrolysis reaction is provided. A reactor vessel made of a suitable material such as zirconium or a zirconium alloy is used, thus resisting corrosion and formation of resinous materials.
Claims11
A method of making resorcinol comprising:
- (i) charging sulfuric acid and meta-phenylenediamine in an aqueous solution to a reactor vessel made of a suitable material;
- (ii) purging said reactor vessel with N2 and sealing said vessel;
- (iii) heating said aqueous solution in said reactor vessel to initiate a hydrolysis reaction, and continuing said heating for a period sufficient to complete the hydrolysis reaction;
- (iv) cooling said aqueous solution;
- and
- (v) extracting said resorcinol from said aqueous solution with an organic solvent,
- said suitable reactor vessel material selected from the group consisting of gold, platinum, titanium, tungsten, zirconium and alloys thereof.
4 more elements
Dependencies are inferred from the claim text.