公开(公告)号：DE2445168A1

公开(公告)日：1976-04-01

申请号：DE2445168

申请日：1974-09-21

Applicant: BASF AG

Inventor： SCHWARZ HANS GEORG DIPL CHEM D ,  GOETZE WALTER DIPL CHEM DR ,  HARTERT ERWIN DIPL CHEM DR

IPC: C01C3/10

Abstract: Prodn. of aq. alkali cyanide solns. by reacting alkali hydroxides with HCN, obtained by thermal, catalytically accelerated splitting of formamide under reduced press; is improved in that up to 95% of crude HCN is directly absorbed by an aq. alkali hydroxide soln. without increasing the press. to atmospheric press; whilst the press of the remaining gases is increased to atmospheric press. only subsequently whereby the liquifaction of the residual HCN is effected; the latter is then reacted with the alkali hydroxide soln. The volume of the gases to be compressed to the atmospheric press. is constantly reduced by the absorption of the bulk of HCN when still under reduced press. whereby the size of the compressor can be reduced and the compression cost is dimished.

公开(公告)号：DE2620445A1

公开(公告)日：1977-11-10

申请号：DE2620445

申请日：1976-05-08

Applicant: BASF AG

Inventor： DISTLER HARRY DR ,  SCHLECHT HELMUT DIPL ING DR ,  HARTERT ERWIN DIPL CHEM DR

IPC: C07C255/24 ,  C07C255/45 ,  C07C255/58 ,  C07D295/14 ,  C07D295/145 ,  C07D295/15 ,  C07C121/43

Abstract: Prepn. of glycine nitriles of formula R3R4N.CR5R6.CN (I) comprises reacting amnes R3R4NH (III) with carbonyl cpds R5COR6 (IV) and HCN in presence of water for 0.1-4 hrs. at 0-80 degrees C. The condn. of HCN never exceeds 0.9 wt. % of the reaction mixt. In the formulae, R3-6 are aromatic, cycloaliphatic or araliphatic gps.; R3 and R4 may together complete a heterocycle; R4-6 may also be H, and R5 and R6 may also be aliphatic, and when R5 and/or R6 is aliphatic aromatic, cycloaliphatic or araliphatic, then R3 and R4 can also be aliphatic. Pref. the products where R3-6 are aromatic gps., R5 and R6 may also be H, aliphatic, cycloaliphatic or araliphatic, and R4 may be H, are subsequently treated with an acid at pH 1-7. (I) are stabilisers; intermediates for dyes (e.g. indigo) fungicides, bactericides, textile auxiliaries and antigelling agents; and by saponification give glycine salts useful as selective adsorbents for CO2, SO2 and H2S, and by hydrogenation give assymetric diamines useful for making pharmaceuticals and plant protection agents. Cf. the process of DT 1543342. This method is simpler and more economic giving better yields of purer products. Water pollution and formation of resinous by-products are minimised, and subsequent acid treatment obviates expensive purification steps and avoids losses of solvent.

公开(公告)号：DE2503582A1

公开(公告)日：1976-08-05

申请号：DE2503582

申请日：1975-01-29

Applicant: BASF AG

Inventor： SCHLECHT HELMUT DIPL ING DR ,  DISTLER HARRY DR ,  HARTERT ERWIN DIPL CHEM DR

IPC: C07C20060101 ,  C07C255/24 ,  C07C121/43

Abstract: N-Alkylglycinonitriles are manufactured by reaction of N-alkylamines with formaldehyde and hydrocyanic acid under specific conditions of temperature, reaction time and hydrocyanic acid concentration.