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公开(公告)号：DE2358856A1
公开(公告)日：1975-05-28
申请号：DE2358856
申请日：1973-11-26
Applicant: BASF AG
Inventor： DIEM HANS DIPL CHEM DR , LIBOWITZKY HERBERT DIPL ING DR , MATTHIAS GUENTHER DIPL CHEM DR , DUDECK CHRISTIAN DIPL CHEM DR , LEHMANN GUNTER
IPC: C07C45/00 , C07C45/86 , C07C47/058 , C07C67/00 , C07C47/04 , C07C45/24 , C07D251/48
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.
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公开(公告)号：DE3145328A1
公开(公告)日：1983-06-01
申请号：DE3145328
申请日：1981-11-14
Applicant: BASF AG
Inventor： DIEM HANS DIPL CHEM DR , FRITSCH ROBERT , LEHNERT HEINZ ING GRAD , MATTHIAS GUENTHER DIPL CHEM DR , SCHATZ HERMANN , WITTMANN OTTO DIPL ING
IPC: C08G14/06 , C08G14/12 , C09J161/34 , C08L61/34 , C09J3/16
Abstract: A further embodiment of the process for the preparation of aqueous solutions of products of the condensation of formaldehyde and at least urea, melamine and phenol, in which the molar proportion of phenol, based on the sum of melamine and urea, is from 0.05 to 0.25, and the molar ratio between urea and melamine is from 0.2:1 to 1:0.2, at a total molar ratio between formaldehyde and the sum of melamine, urea and phenol of from about 1.1 to 2, the condensation products being usable as adhesive resins, in which, in each case in a manner known per se, phenol, formaldehyde and up to 0.35 mol of an alkali metal bisulphite per mol of phenol are reacted to form a phenol-formaldehyde condensate, and formaldehyde and urea are reacted in a molar ratio of 2.5 or less to form a urea-formaldehyde condensate, and the reaction products are themselves reacted with melamine and formaldehyde in such a ratio that the molar ratios between melamine, urea, phenol and formaldehyde mentioned at the outset are either produced directly or after a further reaction with up to 75% of the total intended amount of urea, in accordance with Patent Application P 3125874.3, characterised in that an effective amount of phenol of less than 0.05, based on the sum of melamine and urea, is proposed.
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公开(公告)号：DE2729917A1
公开(公告)日：1979-01-04
申请号：DE2729917
申请日：1977-07-02
Applicant: BASF AG
Inventor： TIEFENBACHER HUBERT DR MED , KRAUS FRIEDRICH DIPL CHEM DR , MATTHIAS GUENTHER DIPL CHEM DR
Abstract: Feed pellets are produced by homogeneously mixing feed meals with from 0.1 to 2% of a pulverulent urea-formaldehyde resin obtained by spray-drying a glue solution, and pelletizing the mixture.
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公开(公告)号：DE3125874A1
公开(公告)日：1983-01-20
申请号：DE3125874
申请日：1981-07-01
Applicant: BASF AG
Inventor： DIEM HANS DIPL CHEM DR , FRITSCH ROBERT , LEHNERT HEINZ ING GRAD , MATTHIAS GUENTHER DIPL CHEM DR , SCHATZ HERMANN , WITTMANN OTTO ING GRAD
IPC: C08G14/06 , C08G14/12 , C09J161/34 , C08G14/10 , C09J3/16
Abstract: Aqueous solutions of adhesive resins made from formaldehyde, urea, melamine and phenol are obtained if phenol, formaldehyde and up to 0.35 mol of an alkaline metal bisulphite per mol of phenol are reacted to give a phenol-formaldehyde condensate and formaldehyde and urea in a molar ratio of 2.5 or less are reacted to give a urea-formaldehyde condensate, and the reaction products are themselves reacted with melamine and formaldehyde.
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公开(公告)号：DE2424379A1
公开(公告)日：1975-11-27
申请号：DE2424379
申请日：1974-05-20
Applicant: BASF AG
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Patent Agency Ranking
公开(公告)号：DE2323758A1
公开(公告)日：1974-11-28
申请号：DE2323758
申请日：1973-05-11
Applicant: BASF AG
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公开(公告)号：DE3215752A1
公开(公告)日：1983-11-03
申请号：DE3215752
申请日：1982-04-28
Applicant: BASF AG
Inventor： MERKEL DIETER DIPL CHEM DR , MUEHLTHALER WOLFGANG DIPL ING , DIEM HANS DIPL CHEM DR , MATTHIAS GUENTHER DIPL CHEM DR
IPC: C07C51/41 , C07C53/122 , C07C51/43
Abstract: Calcium propionate is prepared by passing a vaporous mixture of propionic acid and water into an aqueous solution containing calcium propionate and calcium hydroxide, with or without propionic acid.
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公开(公告)号：DE2803318A1
公开(公告)日：1979-08-09
申请号：DE2803318
申请日：1978-01-26
Applicant: BASF AG
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公开(公告)号：DE2520219A1
公开(公告)日：1976-11-18
申请号：DE2520219
申请日：1975-05-07
Applicant: BASF AG
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公开(公告)号：DE2322757A1
公开(公告)日：1974-11-28
申请号：DE2322757
申请日：1973-05-05
Applicant: BASF AG
Inventor： AICHER ALBERT , HAAS HANS DIPL CHEM DR , SPERBER HEINRICH DIPL CHEM DR , DIEM HANS DIPL CHEM DR , MATTHIAS GUENTHER DIPL CHEM DR , LEHMANN GUNTER
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.
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