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    2.
    发明专利
    未知

    公开(公告)号：BR6906019D0

    公开(公告)日：1973-01-02

    申请号：BR20601969

    申请日：1969-01-30

    Applicant: HOECHST AG

    Inventor： KRAUSE W ,  SCHILKEN H ,  HECK G ,  MALOW E

    IPC: C07C7/11 ,  C10K1/16 ,  C07C11/24

    Abstract: 1,242,634. Separating carbon dioxide and acetylene from cracked gas. FARBWERKE HOECHST A.G. 30 Jan., 1969 [30 Jan., 1968], No. 5208/69. Heading B1L. Carbon dioxide and acetylene are separated from cracked gas streams which also contain other hydrocarbons, hydrogen, water and carbon monoxide by passing the stream by line 1 to acetone wash column 2 having a sump temperature of -10 to -50‹C. and a head temperature of -25 to -60‹C at 10-20 atmos. abs. Gaseous overhead leaves the process, while liquid sorbate passes by line 3 to fractional absorber-desorber 4 at 2-6 atmos. abs., the column having a sump temperature of -20 to 20‹C., and a fractionating column temperature of -20 to -60‹C, wherein the desorbed gases are washed with acetone supplied by line 5 until the desorbed gases contain 10-20 mol % CO 2 and the reabsorbed gases contain at most 0.2 mol % C 2 H 4 . The gaseous overhead from column 4 is returned to feed line 1, while the acetone solution bottoms are passed to desorber 6 and released to a pressure of 1-55 atmos, abs. and a temperature preferably of 105-115‹C. while at the same time being washed with anhydrous acetone which enters through line 17 and which removes water. Wet acetone bottoms containing hydrocarbons passes by line 15 for rectification in column 14. Gaseous overhead from desorber 6 passes by line 7 through drying towers 18 containing silica gel, activated carbon, or molecular sieves to wash column 8 where, at a pressure of 1.6-2 atmos. abs. and a head temperature of -15 to -25‹C. C 2 H 2 is absorbed in a wash stream of dimethyl formamide leaving an overhead of CO 2 . The sorbate passes by line 9 to column 10, where C 2 H 2 is stripped as the overhead, and the dimethyl formamide bottoms returned as wash liquid to column 8. In an alternative embodiment (see Fig. 2, not shown), the gaseous overhead from desorber 6 passes by line 7 to the base of dimethyl formamide absorber (11), bottoms therefrom passing to rectifying absorber (12), CO 2 being collected as the overheads from absorbers (11) and (12). Bottoms from absorber (12) pass to desorber (13) which releases an overhead of C 2 H 2 and a bottom product of dimethyl formamide which is returned to absorbers (11) and (12).

    5.
    发明专利
    未知

    公开(公告)号：DK314582A

    公开(公告)日：1983-01-16

    申请号：DK314582

    申请日：1982-07-14

    Applicant: HOECHST AG

    Inventor： SCHIMMEL G ,  KRAUSE W ,  GRADL R

    IPC: C02F1/26 ,  C01B25/238 ,  C02F1/62 ,  C22B3/00 ,  C22B3/38 ,  B01D

    Abstract: The disclosure relates to a process for liquid/liquid-extraction of heavy metal ions from acid aqueous solutions with the aid of water-insoluble dithiophosphoric acid diesters as extracting agents. More particularly, use is made of phosphoric acid solutions with a P2O5-content of from 3 to 80 weight %, the solutions being free from emulsion-forming organic contaminants or having previously been freed therefrom in known manner. The resulting aqueous phase is separated from the phase containing the dithiophosphoric acid diester.

    6.
    发明专利
    未知

    公开(公告)号：DK126281A

    公开(公告)日：1981-09-23

    申请号：DK126281

    申请日：1981-03-20

    Applicant: HOECHST AG

    Inventor： KRAUSE W ,  GROSSE J ,  KLOSE W

    IPC: C07F9/165 ,  B01J31/00 ,  B01J31/02 ,  C07B61/00 ,  C07F9/17 ,  C07F9/18 ,  C07F

    Abstract: The invention relates to a process wherein an alcohol and/or phenol is reacted with phosphorus pentasulfide in the presence of a catalyst which is selected from (a) phosphonium salts of the general formula: I (b) ammonium salts of the general formula: II (c) phosphine oxides of the general formula: III (d) phosphine sulfides of the general formula: IV (e) phosphinic acid derivatives of the general formula: V In formulae I through V, the substituents R1, R2, R3 and R4 each stand for identical or different alkyl-, aryl-, alkaryl- or aralkyl- groups having from 1 to 22 carbon atoms. A stands for an inorganic or organic acid, and X and Y, respectively, stand for both oxygen and sulfur, and M stands for a monovalent metal or oxygen.

    7.
    发明专利
    未知

    公开(公告)号：BR7016010D0

    公开(公告)日：1973-01-18

    申请号：BR21601070

    申请日：1970-01-14

    Applicant: HOECHST AG

    Inventor： MALON E ,  HECK G ,  KRAUSE W ,  SCHILKEN H

    IPC: C07C7/11 ,  C07C11/24

    Abstract: 1,256,052. Separating carbon dioxide and acetylene from cracked gas. FARBWERKE HOECHST A.G. 15 Jan., 1970 [16 Jan., 1969], No. 1985/70. Addition to 1,242,634. Heading B1L. The rich dimethylformamide loaded principally with carbon dioxide and acetylene from used in the process of the Parent Specification, predegassed at 1.05-1.3 ats. abs. and 95- 110‹C.; 60-70% of the still partially charged product is returned directly for reuse, while the remaining 40-30% is completely degassed at 0.25-0.55 ats. abs. and 110-130‹C. before also being returned to the final wash stage of the process.

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