Abstract: The invention relates to a method for producing amino- or hydroxybenzonitriles during which, within the scope of an ammonolysis, the corresponding amino- or hydroxybenzoic acid compounds are reacted with ammonia in the presence of a phosphate-containing supported catalyst at temperatures between 250° C. and 500° C. The production step is carried out in a reaction gas without an organic solvent followed by at least a 2-stage purification step.

Abstract: What is claimed is a process for preparing amino- or hydroxybenzonitriles, in which, in the course of an ammonolysis, the corresponding amino- or hydroxybenzoic acid compounds are reacted with ammonia in the presence of a supported catalyst comprising phosphate at temperatures between 250° C. and 500° C. The actual preparation step is performed in a reaction gas (mixture) and without involvement of an organic solvent, and is followed by an at least 2-stage purification step. In this purification step, the gaseous mixture obtained from the preparation step is first converted to an aqueous basic suspension and then the product present in the solid is released from this suspension. The main advantage of this combination process is that the starting materials are not esters, which is why the resulting products, in contrast to the processes which are otherwise customary, are free of the by-products which are otherwise customary, which leads to a high product purity.

Abstract: According to the inventive method for catalyst-free production of cyanophenols from methoxybenzonitriles, substituted methoxybenzonitriles of general formula (I) are reacted with an alkali alcoholate at temperatures of 80-230 ° C. The inventive method is based on simple, low-cost and easily accessible raw materials and can be carried out in technically simple conditions, enabling cyanophenols to be produced with high and partially quantitative yields with guaranteed low waste levels. Sodium methanolate is used as a preferred alkali alcoholate at preferred temperatures of 140-180 ° C. The methoxybenzonitrile component can optionally be produced by ammonoxidation of a methoxytoluol of ammonia and (air-)oxygen and be directly further reacted.

Abstract: The present invention relates to modifying agents for melamine-formaldehyde resins and highly reactive thermosetting resins which are prepared with this agent and consist of 1 mol of melamine, 1.5 to 3.5 mol of formaldehyde, 0.5 to 5% by weight of a polyhydric alcohol, based on the melamine plus formaldehyde, and 0.5 to 10% by weight of the modifying agent, based on the liquid resin. The modifying agent can be added to the melamine-formaldehyde resin as a pulverulent mixture before or during the condensation reaction or in the liquid state in the form of a condensation product prepared in a known manner. The modifying agent consists of 10 to 75% by weight of dicyandiamide, 5 to 70% by weight of cold water-soluble starch (soluble between about 18.degree. and about 25.degree. C.) and 20 to 85% by weight of a guanamine. The highly reactive resins modified in this way are preferably used for coating chipboard and hardboard by a short cycle process.