42.
    发明专利
    未知

    公开(公告)号:BR9915651A

    公开(公告)日:2001-08-07

    申请号:BR9915651

    申请日:1999-11-22

    Applicant: BASF AG

    Abstract: The invention relates to a process for the prepartaion of alkanesulfonic acids, comprising the following steps:(a) oxidation of alkylmercaptans and/or dialkyl disulfides and/or dialkyl polysulfides having from three to nine sulfur atoms with nitric acid to form alkanesulfonic acids, water, nitrogen oxides and other byproducts,(b) regeneration of the nitrogen oxides obtained from step (a) with oxygen to give nitric acid and recycling of the nitric acid to step (a),where steps (a) and (b) are carried out in reaction chambers separate from one another.

    45.
    发明专利
    未知

    公开(公告)号:DE19805778A1

    公开(公告)日:1999-08-19

    申请号:DE19805778

    申请日:1998-02-12

    Applicant: BASF AG

    Abstract: Preparation of 2-cycloalkenones (I) comprises subjecting 2-alkoxycycloalkanones (II) and/or 2-hydroxycycloalkanone ketals (III) to a gas-phase elimination reaction in the presence of an acidic heterogeneous catalyst. Preparation of 2-cycloalkenones of formula (I) comprises subjecting 2-alkoxycycloalkanones of formula (II) and/or 2-hydroxycycloalkanone ketals of formula (III) to a gas-phase elimination reaction in the presence of an acidic heterogeneous catalyst: n = 0-20; m = 0-3; R = alkyl, alkylaryl, aryl, arylalkyl, alkenyl or alkynyl, where the aryl groups are optionally substituted by 1-2 of alkyl, OH and alkoxy; R' = alkyl or alkenyl, or R'+R' = 1-5C alkylene or 2-5C alkenylene.

    49.
    发明专利
    未知

    公开(公告)号:DE102005030282A1

    公开(公告)日:2007-01-04

    申请号:DE102005030282

    申请日:2005-06-29

    Applicant: BASF AG

    Abstract: A biodiesel fuel mixture having a cetane number of >40, comprising a) from 1 to 100% by weight of biodiesel, b) from 0 to 98.9% by weight of diesel oil of fossil origin, c) from 0.1 to 20% by weight of polyoxyalkylene dialkyl ether of the formula RO(CH 2 O) n R in which R is an alkyl group having from 1 to 10 carbon atoms and n=from 2 to 10, and d) from 0 to 5% by weight of further additives.

    PROCEDIMIENTO PARA LA OBTENCION DE ACIDOS ALCANO-SULFONICOS.

    公开(公告)号:ES2225085T3

    公开(公告)日:2005-03-16

    申请号:ES00905013

    申请日:2000-02-03

    Applicant: BASF AG

    Abstract: Procedimiento para la obtención de ácidos alcanosulfónicos, que comprende los siguientes pasos: (a) reacción de un epóxido con dióxido de azufre, en caso dado en presencia de un catalizador, para dar sulfato de alquileno, (b) reacción de sulfito de alquileno con un alcohol, en caso dado, en presencia de un catalizador, para dar sulfito de dialquilo y el correspondiente diol, (c) transposición de sulfitos de dialquilo en presencia de un catalizador para dar el correspondiente alcanosulfonato de alquilo, (d) hidrólisis de alcanosulfonato de alquilo para dar el ácido alcanosulfónico deseado, pudiéndose recircular en las correspondientes etapas previas algunos de los productos secundarios formados en los diferentes pasos, o bien pudiéndose utilizar como producto de valor el diol formado en el paso (b), y llevándose a cabo el paso (b) de manera continua en una columna como procedimiento contra corriente.

Patent Agency Ranking