公开(公告)号：DE2534018A1

公开(公告)日：1977-02-17

申请号：DE2534018

申请日：1975-07-30

Applicant: BASF AG

Inventor： FUERST ERNST DIPL CHEM DR ,  KUESSNER KLAUS DIPL CHEM DR

IPC: B01D53/14 ,  B01D53/16

Abstract: Separation of CO2 and/or H2S from gases is effected by washing the gases with aq. solns. contg. -dimethyl aminobutyric acid dimethylamide, having formua Me2N-(CH2)3-CONMe2, (I), as absorbent. Absorption takes place under press. Solvent is regenerated after releasing press. Process can be used for purifying natural gas, coke oven gas, coal gasification gas and synthesis gas. (I) is low-foaming and causes less corrosion than standard tert. N-contg. alkanolamines. E.g. foaming with (I) was 0.2 mm compared to 2 mm with methyl diethanolamine. Yearly linear corrosion wt. loss of appts. was reduced from 1 to 0.6. In an example, CO2-content of synthesis gas, was reduced from 29.4- to 0.1 vol. % by counter-current contact of 270 m3/hr synthesis gas at 17 bar, 75 degrees C, with 3.1 m3/hr 2.5 molar soln. of (I) at 75 degrees C.

公开(公告)号：DE2404511A1

公开(公告)日：1975-08-14

申请号：DE2404511

申请日：1974-01-31

Applicant: BASF AG

Inventor： FUERST ERNST DIPL CHEM DR ,  GERENDAS JOZSEF DIPL CHEM DR ,  ROKOHL RUDOLF DIPL CHEM DR ,  FIKENTSCHER ROLF DIPL CHEM DR ,  HELFERT HERBERT DIPL CHEM DR

IPC: D06P1/66 ,  D06P3/76 ,  C07D251/04

Abstract: Title cpds. of formula (I): (where R1 is opt. branched 1-6C alkyl opt. substd. by OH gps, or two R1 gps. together with the N atom form a 4-7C heterocycle; R2-R4 are each a cyclic, linear or branched, satd. or contg. an olefinic link 1-30C alkyl, opt. substd. by OH gps. and opt. interrupted by ether bridges, or a phenyl or benzyl gp. opt. substd. by Cl or 1-12C alkyl; R3 and R4 may also represent H or a pair of free electrons; R5 is H or 1-4C alkyl; Z is 2-6C alkylene, opt. substd. esp. by OH gps. or interrupted by either or ester gps; X- is an (in)organice anion; and these various anions may be the same or different; n is a whole no. 1-3), are prepd. by quaternising the corresp. unguaternised cpd. They are effective in amts. of 0.003-1.5 wt. % w.r.t. anionic polyacrylonitrile fibres.