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公开(公告)号：DE2904315A1
公开(公告)日：1980-08-14
申请号：DE2904315
申请日：1979-02-05
Applicant: BASF AG
Abstract: In a new process for the prodn. of p-hydroxybenzaldehyde, p-benzyloxy-benzaldehyde derivs. of formula PhCH2OAr are treated with an aq. hydrohalic acid at 70-130 degrees C: Ar is p-formyl-phenyl or its acetal with 1-3C alkyl gps. Reaction temp. is pref. 90-120 degrees C. Suitable hydrohalic acids are HCl and HBr with a concn. of e.g. 5-30 wt.% (the concn. pref. being less than that of the constant boiling mixt. with water). The aq. hydrohalic acid is generally used in an amt. of 3-20 times the wt. of benzoaldehyde deriv. Reaction time is generally 3-20 hrs. Benzyl halide formed as byproduct is advantageously removed from the reaction mixt. by azeotropic distn. with the aq. hydrohalic acid. The single-step process gives prod. of excellent quality in good yields.
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公开(公告)号：DE3045370A1
公开(公告)日：1982-07-01
申请号：DE3045370
申请日：1980-12-02
Applicant: BASF AG
Inventor： DEGNER DIETER DIPL CHEM DR , BARL MANFRED DIPL CHEM DR
IPC: C25B3/29 , C07C43/305 , C07C50/04 , C25B3/23 , C25B3/02
Abstract: 1. A process for the preparation of a mixture of ketals of trimethyl-p-benzoquinone, of the formula see diagramm : EP0053261,P4,F2 where R**1 and R**2 are alkyl of 1 to 4 carbon atoms and R**3 is R**2 O, or the two radicals R**3 together are oxygen, wherein an alkyl trimethylphenyl ether of the formula see diagramm : EP0053261,P4,F3 is oxidized electrochemically in the presence of an alkanol of the formula R**2 OH.
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公开(公告)号：DE3107147A1
公开(公告)日：1982-09-09
申请号：DE3107147
申请日：1981-02-26
Applicant: BASF AG
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公开(公告)号：DE3102343A1
公开(公告)日：1982-02-18
申请号：DE3102343
申请日：1981-01-24
Applicant: BASF AG
Inventor： HORACEK HEINRICH DIPL CHEM DR , BARL MANFRED DIPL CHEM DR , WURMB ROLF DIPL CHEM DR , MARX MATTHIAS DIPL CHEM DR
Abstract: The invention relates to a process for the preparation of optionally foamed polyurethanes by reacting organic polyisocyanates with relatively high-molecular-weight organic polyhydroxyl compounds in the presence of guanidines and/or thioureas of the formula in which X is sulphur or an =NH group, and n is a number from 2 to 6, as catalyst and optionally blowing agents, chain extenders, assistants and additives.
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Patent Agency Ranking
公开(公告)号：DE3003978A1
公开(公告)日：1981-08-13
申请号：DE3003978
申请日：1980-02-04
Applicant: BASF AG
IPC: C07C279/12 , C07C129/12
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公开(公告)号：DE2935398A1
公开(公告)日：1981-03-26
申请号：DE2935398
申请日：1979-09-01
Applicant: BASF AG
Inventor： BARL MANFRED DIPL CHEM DR , DEGNER DIETER DIPL CHEM DR , SIEGEL HARDO DIPL CHEM DR , HOFFMANN WERNER DIPL CHEM DR
IPC: C07C41/00 , C07C41/50 , C07C43/315 , C07C45/51 , C07C45/67 , C07C47/565 , C07C67/00 , C25B3/23 , C25B3/29 , C07C43/30
Abstract: 1. A process for the preparation of a 4-tert.-butoxybenzaldehyde-dialkylacetal of the formula see diagramm : EP0025883,P4,F2 where R is alkyl of 1 to 8 carbon atoms, wherein 4-tert.-butoxytoluene is oxidized electrochemically in the presence of an alcohol of the formula ROH, where R has the above meaning.
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公开(公告)号：DE3003963A1
公开(公告)日：1981-08-13
申请号：DE3003963
申请日：1980-02-04
Applicant: BASF AG
Inventor： HORACEK HEINRICH DR , BARL MANFRED DIPL CHEM DR , WURMB ROLF DIPL CHEM DR , MARX MATTHIAS DIPL CHEM DR
IPC: C08G18/18
Abstract: A process for making a polyurethane which comprises reacting an organic polyisocyanate with a higher molecular weight organic polyhydroxyl compound in the presence of a catalyst having the following formula: wherein X is sulfur or NH and n is a whole number from 2 to 6. Also used is a catalyst which is a combination of the above-mentioned catalyst and an organic tin compound.
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公开(公告)号：DE2848397A1
公开(公告)日：1980-05-22
申请号：DE2848397
申请日：1978-11-08
Applicant: BASF AG
IPC: C07C41/00 , C07C41/50 , C07C43/315 , C07C67/00 , C07C239/00 , C07C271/44 , C25B3/23 , C25B3/25 , C25B3/02
Abstract: 4-substituted benzaldehyde-dialkylacetals of the formula where R1 is one of the radicals CH2=CH-CH2-, R2 is alkyl and R3 and R4 are hydrogen or alkyl, and a process for the electrochemical preparation of these compounds.
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