公开(公告)号：US3853719A

公开(公告)日：1974-12-10

申请号：US32220573

申请日：1973-01-09

Applicant: BASF AG

Inventor： MATTHIAS G ,  DIEM H ,  LEHMANN G

IPC: C07C47/058 ,  C07C45/00 ,  C07C45/38 ,  C07C45/83 ,  C07C67/00 ,  B01D3/34 ,  C07C47/04

CPC classification number: C07C45/83 ,  C07C47/04

Abstract: The production of a formaldehyde solution having a low content of methanol by distilling aqueous formaldehyde solution containing methanol in the presence of a mixture of at least one alkanol of more than seven carbon atoms and at least one dialkyl ether of more than seven carbon atoms per alkyl group.

Abstract translation: 在至少一种具有7个以上碳原子的链烷醇和至少一个每个烷基碳原子数大于7个碳原子的二烷基醚的存在下，通过蒸馏含有甲醇的甲醛水溶液来生产甲醇含量低的甲醛溶液 组。

公开(公告)号：SE395687B

公开(公告)日：1977-08-22

申请号：SE7300451

申请日：1973-01-12

Applicant: BASF AG

Inventor： MATTHIAS G ,  DIEM H ,  LEHMANN G

IPC: C07C45/00 ,  C07C45/38 ,  C07C45/83 ,  C07C47/058 ,  C07C67/00 ,  C07C47/04 ,  C07C45/24

Abstract: The production of a formaldehyde solution having a low content of methanol by distilling aqueous formaldehyde solution containing methanol in the presence of a mixture of at least one alkanol of more than seven carbon atoms and at least one dialkyl ether of more than seven carbon atoms per alkyl group.

公开(公告)号：NO753122A

公开(公告)日：1976-03-19

申请号：NO753122

申请日：1975-09-12

Applicant: BASF AG

Inventor： AICHER A ,  HAAS H ,  DIEM H ,  DUDECK C ,  BRUNNMUELLER F ,  LEHMANN G

IPC: C07B61/00 ,  C07C45/00 ,  C07C45/38 ,  C07C45/78 ,  C07C47/055 ,  C07C47/058 ,  C07C67/00 ,  C07C

CPC classification number: C07C45/38 ,  C07C45/783 ,  C07C47/04

公开(公告)号：ZA7408157B

公开(公告)日：1976-01-28

申请号：ZA7408157

申请日：1974-12-23

Applicant: BASF AG

Inventor： DIEM H ,  DUDECK C ,  LEHMANN G

IPC: C07D251/18 ,  C07D20060101 ,  C07D251/22 ,  C07D251/48 ,  C07D403/12 ,  C07D

CPC classification number: C07D251/18

公开(公告)号：ZA7302779B

公开(公告)日：1974-04-24

申请号：ZA7302779

申请日：1973-04-25

Applicant: BASF AG

Inventor： DIEM H ,  MATTHIAS G ,  HUSSY O

IPC: C07C47/052 ,  C07C45/00 ,  C07C45/38 ,  C07C47/055 ,  C07C67/00

CPC classification number: C07C45/38 ,  C07C47/04

公开(公告)号：ZA755925B

公开(公告)日：1976-09-29

申请号：ZA755925

申请日：1975-09-17

Applicant: BASF AG

Inventor： BRUNNMUELLER F ,  LEHMANN G ,  DIEM H ,  DUDECK C ,  AICHER A ,  HAAS H

IPC: C07B61/00 ,  C07C45/00 ,  C07C45/38 ,  C07C45/78 ,  C07C47/055 ,  C07C47/058 ,  C07C67/00 ,  C07C

Abstract: Formaldehyde is manufactured by oxidative dehydrogenation of methanol in the presence of a silver catalyst and of certain amounts of steam and formaldehyde, some formaldehyde and a part of the water being withdrawn from the reaction mixture and recycled. The formaldehyde manufactured by the process may be used as a disinfectant, tanning agent, reducing agent and starting material for the manufacture of synthetic resin, adhesives and plastics.

公开(公告)号：ZA7505925B

公开(公告)日：1976-09-29

申请号：ZA7505925

申请日：1975-09-17

Applicant: BASF AG

Inventor： BRUNNMUELLER F ,  LEHMANN G ,  DIEM H ,  DUDECK C ,  AICHER A ,  HAAS H

IPC: C07B61/00 ,  C07C45/00 ,  C07C45/38 ,  C07C45/78 ,  C07C47/055 ,  C07C47/058 ,  C07C67/00 ,  C07C

CPC classification number: C07C45/38 ,  C07C45/783 ,  C07C47/04

公开(公告)号：ZA747512B

公开(公告)日：1976-01-28

申请号：ZA747512

申请日：1974-11-25

Applicant: BASF AG

Inventor： DUDECK C ,  LEHMANN G ,  DIEM H ,  LIBOWITZKY H

IPC: C07C45/00 ,  C07C45/86 ,  C07C47/058 ,  C07C67/00 ,  C07C ,  C07D

Abstract: 1480921 Stabilizing aqueous formaldehyde BASF AG 25 Nov 1974 [26 Nov 1973] 50896/74 Heading C2C Aqueous formaldehyde solutions are stabilized by means of a bis-guanamine of formula wherein the two substituent on the phenylene ring are in m or p-position to each other. 0À001 to 0À5% by weight of stabilizer may be used and the formaldehyde solution may contain 28-65% by weight of formaldehyde. The stabilizer may be added as a stock solution in a formaldehyde solution of higher strength than that to be stabilized and having a pH of 2À5 to 5À8 and the latter is preferably kept at 40-80‹ C. for 10-30 hours before adding the stock solution.

公开(公告)号：ZA742758B

公开(公告)日：1975-05-28

申请号：ZA742758

申请日：1974-05-01

Applicant: BASF AG

Inventor： LEHMANN G ,  DIEM H ,  MATTHIAS G ,  HAAS H ,  SPERBER H ,  AICHER A

IPC: B01J23/00 ,  C07B61/00 ,  C07C45/00 ,  C07C45/38 ,  C07C47/055 ,  C07C67/00 ,  C07C45/16

Abstract: The production of formaldehyde by oxidizing dehydrogenation of methanol in the presence of a silver catalyst which consists of three or more layers each of specific weight and particles of specific particle size and having a specific total layer thickness. Formaldehyde prepared according to the process of the invention is a disinfectant, tanning agent, reducing agent and valuable starting material for the production of synthetic resins, adhesives and plastics.

公开(公告)号：BR7201868D0

公开(公告)日：1973-05-31

申请号：BR186872

申请日：1972-03-29

Applicant: BASF AG

Inventor： DIEM H ,  MATTHIAS G ,  BRUNMULLER F

IPC: C07C45/38 ,  C07C47/04

Abstract: Production of formaldehyde by oxidizing dehydrogenation of methanol in the presence of a silver catalyst and a tertiary or secondary amine. The formaldehyde which can be prepared by the invention is a disinfectant, tanning agent, reducing agent and valuable starting material for the production of synthetic resins, adhesives and plastics.