公开(公告)号：DE3713618C1

公开(公告)日：1988-09-15

申请号：DE3713618

申请日：1987-04-23

Applicant: BASF AG

Inventor： SCHMEIDL KARL DR

IPC: C09B37/00 ,  C09B67/14 ,  C09B67/34 ,  D21H21/28 ,  C09B67/36

Abstract: Process for the preparation of colour-stable solutions of azo dyes which are obtained by diazotisation and coupling of m-phenylenediamine or its derivatives, in which at the end of reaction the resulting mixture is admixed with from 0.1 to 1.2 mol of formic acid per mole of m-phenylenediamine and is treated at a temperature of from 60@C up to the boiling temperature of the reaction mixture.

公开(公告)号：DE2144420A1

公开(公告)日：1973-03-08

申请号：DE2144420

申请日：1971-09-04

Applicant: BASF AG

Inventor： BERMES RUDOLF DR ,  SCHMEIDL KARL DR

IPC: C07C67/00 ,  C07C201/00 ,  C07C201/04 ,  C07C203/00 ,  C09B41/00 ,  C09B67/24 ,  C07C77/00

公开(公告)号：DE2138179A1

公开(公告)日：1973-02-08

申请号：DE2138179

申请日：1971-07-30

Applicant: BASF AG

Inventor： SCHMEIDL KARL DR ,  ANDREE FRANZ DR

IPC: C09B11/24 ,  C09B57/00

Abstract: Esterified rhodamine dyes of formula: (in which R, R2, R4 and R7 are methyl or ethyl; R1 and R3 are H, methyl or ethyl; R5 and R6 are H or methyl), are prepd. by reaction of bases of formula: with di(m)ethyl sulphate in water-miscible solvents contg. oxygen, the solvent is prefd. being a glycol and/or glycol ether. The reaction can be carried out at very high dye concns. and esterification is so complete that purification of the soln. obtd. is unnecessary. The solns. are suitable for dyeing paper.

公开(公告)号：DE3832739A1

公开(公告)日：1990-03-29

申请号：DE3832739

申请日：1988-09-27

Applicant: BASF AG

Inventor： SCHMEIDL KARL DR

IPC: C09B11/24 ,  C09B67/00 ,  C09B67/42 ,  C09B67/54

Abstract: Salts of esterified rhodamine dyes are prepared in granular form by precipitating the rhodamine dyes with sodium chloride from an aqueous medium containing a water-miscible solvent by adding the sodium chloride at 80 DEG -100 DEG C., which precipitates the dyes in liquid form from the aqueous medium, then stirring the liquid dyes to convert them into a droplet form and then chilling the droplets by direct cooling to below 65 DEG C.

公开(公告)号：DE2258344A1

公开(公告)日：1974-05-30

申请号：DE2258344

申请日：1972-11-29

Applicant: BASF AG

Inventor： SCHMEIDL KARL DR ,  EISERT MANFRED DR

IPC: C09B11/02 ,  C09B69/06 ,  C09B67/00

Abstract: Auramine salts are prepd by (a) forming the auramine base; (b) dissolving it in org. water-immiscible solvent (II); and (c) extracting the base by reaction with aq. acid (III) contg. glycol of formamide, to form the salt where the solvent is immiscible with glycol and formamide when acid is present. The base is liberated in soda wash. The NH4 salt is sulphate, chloride, sulphamate, sulphanylate or toluene sulphonate. (II) is tri- or tetra-chlorethylene. (III) is sulphuric, hydrochloric or low mol. wt carboxylic acids. The method gives, better yields, reduced effluent and needs smaller plant.

公开(公告)号：DE2234836A1

公开(公告)日：1974-01-31

申请号：DE2234836

申请日：1972-07-15

Applicant: BASF AG

Inventor： EISERT MANFRED DR ,  SCHMEIDL KARL DR

IPC: C09B11/02 ,  C09B69/06

Abstract: The reaction components are reacted, opt. with the addition of an ammonium salt and the reaction prod. which may contain liberated ethylauramine base, is collected in an organic, water-immiscible solvent. The ethylauramine base is then extracted with an acid contg. HCHO or glycol with formation of the salt, >80% yields of a highly pure prod. are obtd.

公开(公告)号：DE2207609A1

公开(公告)日：1973-08-30

申请号：DE2207609

申请日：1972-02-18

Applicant: BASF AG

Inventor： SCHMEIDL KARL DR ,  EISERT MANFRED DR

IPC: C09B11/02 ,  C09B67/32 ,  C07C119/14

Abstract: Salts have formula: (Et2N-pC6H4)2-C=NH2 circled positive A circled negative (where A circled negative is NO2 circled negative or NO3 circled negative) and are prepd. by double decompsn. reaction of a water-sol. ethyl auramine salt with a water sol. nitrate or nitrite.

公开(公告)号：DE4224302A1

公开(公告)日：1994-01-27

申请号：DE4224302

申请日：1992-07-23

Applicant: BASF AG

Inventor： SCHMEIDL KARL DR

IPC: B01J2/00 ,  B01J2/06 ,  C09B67/00 ,  C09B67/10 ,  C09B67/54 ,  C09C3/00

Abstract: Described is a method of purifying solid hydrophobic substances in the presence of water to form a granulate material by treating the solid substances, under warm conditions, optionally several times, with one or more different two-phase systems comprising (A) a phase which wets the solid substances and causes the granulate material to form and which consists essentially of one or more organic liquids which are immiscible or only partially miscible with water and (B) a phase which takes up the impurities and which consists essentially of (B1) water, one or more organic liquids miscible with water and, optionally, an inorganic acid or base or (B2) water and an inorganic acid. The granulate material thus formed is subsequently separated from the aqueous phase.

公开(公告)号：DE3531272A1

公开(公告)日：1987-03-12

申请号：DE3531272

申请日：1985-09-02

Applicant: BASF AG

Inventor： SCHMEIDL KARL DR

IPC: C09B11/24 ,  C09B11/20 ,  C09B67/44 ,  C09D11/02 ,  C09B63/00 ,  C09D11/16 ,  D21H1/46 ,  D21H3/80

Abstract: The invention relates to a process for the preparation of completely esterified Rhodamine dyestuffs of the formula I in which, independently of one another, R, R and R are methyl or ethyl, R and R are hydrogen, methyl or ethyl, R and R are hydrogen or methyl and A is an anion, from compounds of the formula II or the corresponding water addition products by esterification with dialkyl sulphates in solvents, which is characterized in that the solvents used are gamma-butyrolactone, alkylene carbonates, dialkyl carbonates, methoxypropyl acetate or dialkyl phthalates and that the reaction is carried out in the presence of an excess of a base, relative to dialkyl sulphate.

公开(公告)号：DE2261064A1

公开(公告)日：1974-06-27

申请号：DE2261064

申请日：1972-12-14

Applicant: BASF AG

Inventor： SCHMEIDL KARL DR ,  EISERT MANFRED DR

IPC: C09B11/02 ,  C09B69/06

Abstract: Auramine salts are prepd by (a) forming the auramine base; (b) dissolving it in org. water-immiscible solvent (II); and (c) extracting the base by reaction with aq. acid (III) contg. glycol of formamide, to form the salt where the solvent is immiscible with glycol and formamide when acid is present. The base is liberated in soda wash. The NH4 salt is sulphate, chloride, sulphamate, sulphanylate or toluene sulphonate. (II) is tri- or tetra-chlorethylene. (III) is sulphuric, hydrochloric or low mol. wt carboxylic acids. The method gives, better yields, reduced effluent and needs smaller plant.