Abstract:
PROBLEM TO BE SOLVED: To provide a method for fractionating an amine-containing mixture. SOLUTION: According to circumstances, (i) a (first) low boiling point matter fraction is separated and removed from the amine-containing mixture by distillation, according to circumstances, (ii) a (first) high boiling point matter fraction is separated and removed from the amine-containing mixture by distillation, (iii) the amine-containing mixture is subjected to extraction using a sodium hydroxide solution to produce a sodium hydroxide-containing aqueous first phase and an amine-, (further) low boiling point matter- and, according to circumstances, (further) high boiling matter-containing water-organic second phase, (iv) the water-organic second phase is distilled to produce a substantially anhydrous amine as a column bottom phase taken-out substance or as a lateral flow extract in the stripping part of a distillation column, an amine/water azeotropic mixture as a lateral flow extract in the concentration part of the column and a (further) low boiling matter fraction as a column top extract and the amine/water azeotropic mixture is returned to the extraction process (iii) and, according to circumstances, (v) the substantially anhydrous amine is refined or fractionated. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a method for fractionating an amine-containing mixture. SOLUTION: This method for fractionating the amine-containing mixture containing one or more kinds of amines, water, a low boiling-point material, and a high boiling-point material comprises (i) separating and removing the low boiling-point material from the amine-containing mixture by distillation, (ii) separating and removing the high boiling-point material from the amine- containing mixture by the distillation, (iii) extracting the resultant amine- containing mixture by using a sodium hydroxide solution to provide a first aqueous phase containing the sodium hydroxide and a second aqueous-organic phase containing the amine, (iv) distilling the second aqueous-organic phase to produce an amine/water azeotropic mixture and a substantially anhydrous amine, and returning the amine/water azeotropic mixture to the extracting step (iii).
Abstract:
The use of inorganic or organic poly acids is claimed for treating mineral fertilisers containing a nitrification inhibitor. The use of compounds of formula (I) is claimed as nitrification inhibitors. R1 = H, halo or 1-4C alkyl; R2 = 1-4C alkyl; R3 = H or CH2OH, and when R3 = H, the compound may be converted to a phosphoric acid salt. A mineral fertiliser containing a poly acid and optionally (I) is also claimed. 3,4-dimethylpyrazole (Ia), 4-chloro-3-methyl-pyrazole (Ib), N-hydroxymethyl-3,4-dimethylpyrazole (Ic), N-hydroxymethyl-4-chloro-3 -methylpyrazole (Id), acid addition salts of (Ic) and (Id), and mixtures of two or more of (Ia)-(d) are new. -
Abstract:
The invention relates to a method for production of polyvalent alcohols with low acetal content by catalytic hydrogenation of methylolalkanals of general formula (I), where R 1 and R 2 independently = a further methylol or C 1 - 22 alkyl group or C 6 - C 33 aryl or aralkyl group in the liquid phase on a hydrogenation catalyst, characterised in that at least one tertiary amine, inorganic base or inorganic or organic acid is added to the hydrogenation feed to adjust the pH value of the hydrogenation product to 7.0 to 9.0.
Abstract:
The use of selected pyrazole derivatives as nitrification inhibitor in mineral fertilisers and as stabilisers for liquid manure or liquid fertiliser formulations, as well as the treated corresponding mineral fertilisers themselves, and pyrazole derivatives than can be used as nitrification inhibitors in mineral fertilisers and as stabilisers in liquid manure or liquid fertiliser formulations.
Abstract:
The use of inorganic or organic poly acids is claimed for treating mineral fertilisers containing a nitrification inhibitor. The use of compounds of formula (I) is claimed as nitrification inhibitors. R1 = H, halo or 1-4C alkyl; R2 = 1-4C alkyl; R3 = H or CH2OH, and when R3 = H, the compound may be converted to a phosphoric acid salt. A mineral fertiliser containing a poly acid and optionally (I) is also claimed. 3,4-dimethylpyrazole (Ia), 4-chloro-3-methyl-pyrazole (Ib), N-hydroxymethyl-3,4-dimethylpyrazole (Ic), N-hydroxymethyl-4-chloro-3-methylpyrazole (Id), acid addition salts of (Ic) and (Id), and mixtures of two or more of (Ia)-(d) are new.
Abstract:
. Technical Result Simplification of technological process and increase in yield of product. 2. Essence Process for the preparation of 3(5)-methylpyrazoles of the general formula 1a and 1b wherein R-hydrogen, alkyl with 1-6 carbon atoms, non-substituted or substituted phenyl are interacting with hydrazine of the general formula (II) RHN-NH wherein R has the mentioned values or with hydrate thereof with diacetylene comprising flow, which is separated at production of acetylene obtained from cracked gas by absorption. 3. Field of Application Organic chemistry.
Abstract:
Inorganic or organic polyacids are used to treat inorganic fertilizers in powder or granule form that contain a nitrification inhibitor. A nitrogen inhibitor containing inorganic fertilizer that has been treated with at least one inorganic or organic polyacid or an inorganic fertilizer that has been treated with a mixture of nitrogen inhibitor and at least one inorganic or organic polyacid in powder or granule form is disclosed.