公开(公告)号：DE4002132A1

公开(公告)日：1991-08-01

申请号：DE4002132

申请日：1990-01-25

Applicant: HOECHST AG

Inventor： PORZ CHRISTOPH DR ,  CHRISTENSEN BERND DR ,  KYAW-NAING ELENA ,  GULDEN WALTER DR ,  PAULUS ERICH FRIEDRICH DR

IPC: B01D53/14 ,  B01D53/34 ,  B01D53/52 ,  B01D53/77 ,  C07C7/11 ,  C10L3/10

Abstract: A method is described for trapping hydrogen sulphide from gases, the hydrogen sulphide-containing gas being passed into an aqueous solution of glyoxal, at least 15% strength by weight, at a pH of this solution of 5 to 11 until the molar ratio of glyoxal to hydrogen sulphide is 3 to 2. The solid reaction product obtained as a result, which contains bound hydrogen sulphide, is separated off. As a result of its stability and insolubility in acids and bases, it can be disposed of in landfill without problem.

公开(公告)号：DE4001420A1

公开(公告)日：1991-07-25

申请号：DE4001420

申请日：1990-01-19

Applicant: HOECHST AG

Inventor： PORZ CHRISTOPH DR ,  REINHARDT GERD DR ,  HOFFMANN HERMANN DR

IPC: C07F9/38 ,  C08F26/00 ,  C08F26/02 ,  C08F30/02 ,  C09K23/52 ,  C23F11/167 ,  E21B43/22

Abstract: Alkenylaminomethylene phosphoric acids of formula (I) are claimed. R1 = H, 4-10C alkyl, phenyl, naphthyl, methylphenyl, hydroxyphenyl, methoxyphenyl, methylnapththyl, hydroxynaphthyl or methoxynaphthyl, esp. phenyl; R2 = H; R3, R4, R6 = H or methyl, R5 = H, 1-4C alkyl or phenyl, and M = H or Na(+), K(+) and NH4(+). Also claimed are: (i) prepn. of (I) by reacting a cpd. of formula (II) with an aldehyde of formula R1-CHO, and treating the prod. obtd. of formula (III) with an excess of phosphoric acid. (ii) copolymers comprising 0.1-99.9(1-50) wt.% of one or more monomers of formula (I), where r2 = H or CH2PO3M2, and 99.9-0.1 (99-50) wt.% of one or more monomers of formula R1@R2'C=CR3'X (IV) R1' = H or COOM; R2' = H, phenyl, or COOM; R3' = H, methyl, COOM or CH2COOM; X = COOM; R2' and R3' together = 4C alkyl; R1' and X together = cpd. of formula (V). F3' and X together = a cpd. of formula (VI) (iii) prepn. of the copolymers by polymerising (I) with (II), pref. in the presence of Na2SO4.

公开(公告)号：DE4012769A1

公开(公告)日：1991-10-24

申请号：DE4012769

申请日：1990-04-21

Applicant: HOECHST AG

Inventor： GETHOEFFER HANSPETER DR ,  REINHARDT GERD DR ,  NOELTNER GERHARD ,  PORZ CHRISTOPH DR

IPC: A01N37/22 ,  A01N43/40 ,  A01N43/46 ,  C11D3/37 ,  C11D3/39 ,  C11D3/395 ,  C11D7/54