摘要:
Supported catalysts, obtainable bya) dissolving a catalytically active component or its intermediate in a solvent,b) adding an organic polymer which is capable of binding at least ten times its own weight of water to the solution thus obtained,c) then mixing the polymer with a catalyst carrier,d) molding the material thus obtained, drying and calcining, a process for their preparation and their use.
摘要:
A process for the selective hydrogenation of butadiene to butenes in the liquid phase or trickle phase in contact with a fixed-bed supported noble metal catalyst, wherein a high-butadiene C.sub.4 stream having a butadiene content of from 20 to 80% w/w, based on the weight of the C.sub.4 stream, is hydrogenated in a cascade of two reaction zones such that the hydrogenation product from the first reaction zone has a butadiene content of from 0.1 to 20% w/w and the hydrogenation product from the second reaction zone has a butadiene content of from 0.005 to 1% w/w, based in both cases on the weight of the C.sub.4 stream, provided that the butadiene content of the hydrogenation product from the second reaction zone is at least 5 times smaller than that of the hydrogenation product from the first reaction zone.
摘要:
The present invention relates to the use of at least one heterocyclic compound of the formula (I) in which R is H or C1-C3-alkyl as a frictional wear-reducing additive in fuel compositions; to corresponding additized fuel compositions and their preparation; and to additive concentrates which comprise such compounds.
摘要:
This invention relates to an additive package containing an organic solvent, a detergent additive and a reaction product mixture obtained by reacting a carboxylic acid compound of formula (I): R1COOR2 with an alkanol amine of formula (II): NHR3R4 to form a reaction product containing a polysubstituted alkanol amine derivative, where the reaction is performed by: (a) heating the carboxylic acid of formula (I) to a first temperature; (b) adding thereto the alkanol amine of formula (II) under controlled conditions avoiding an increase of temperature above the first temperature range; (c) maintaining temperature in the first temperature range; and (d) increasing the temperature of the reaction mixture to a second temperature in a second temperature range of 160 to 210° C. and allowing further reaction of residual free carboxylic acid molecules with any reactive group in the reaction mixture.
摘要翻译:本发明涉及含有有机溶剂,洗涤剂添加剂和通过使式(I)的羧酸化合物:R1COOR2与式(II)的链烷醇胺:NHR 3 R 4反应形成反应产物而得到的反应产物混合物的添加剂包 含有多取代的烷醇胺衍生物,其中反应通过以下步骤进行:(a)将式(I)的羧酸加热至第一温度; (b)在控制条件下加入式(II)的链烷醇胺,避免温度升高至高于第一温度范围; (c)将温度保持在第一温度范围内; 和(d)在160至210℃的第二温度范围内将反应混合物的温度升至第二温度,并允许残余游离羧酸分子与反应混合物中的任何反应性基团进一步反应。
摘要:
The present invention relates to the use of at least one heterocyclic compound of the formula (I) in which R is H or C1-C3-alkyl as a frictional wear-reducing additive in fuel compositions; to corresponding additized fuel compositions and their preparation; and to additive concentrates which comprise such compounds.
摘要:
The present invention relates to the use of at least one heterocyclic compound of the formula (I) in which P is H or C1-C3-alkyl as a frictional wear-reducing additive in fuel compositions; to corresponding additized fuel compositions and their preparation; and to additive concentrates which comprise such compounds.
摘要:
A fuel composition containing, as major component, a gasoline having an aromatics content of not more than 42 vol % and a sulfur content of not more than 150 ppm by weight, and, as minor component, at least one gasoline additive having a detergent action or an anti-valve-seat-wear action, in which this gasoline additive contains at least one hydrophobic hydrocarbon group having a number-average molecular weight of from 85 to 20,000 and at least one polar group.
摘要:
The invention relates to polyalkene alcohol polyetheramines of formula R1—(CH2)n—O—A)m—NR2R3, wherein R1 represents a polyalkene radical derived from C2- to C30-alkenes with a number average molecular weight of 300 to 5000, R2 and R3 each mean, independently of each other, hydrogen or organic radicals with a total of 400 carbon atoms. A denotes alkylene groups with 2 to 8 C atoms, m is a number from 1 to 200 and n denotes the number 0 or 1. The inventive polyalkene alcohol polyetheramines are suitable for use as carrier oils, detergents and dispersing agents in fuel and lubricant compositions.
摘要:
Polyalkeneamines of the formula (I) ##STR1## where R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 may have different meanings, are prepared by a process in which a polyalkene epoxide is reacted with an amine and the amino alcohol is dehydrated and reduced to give the compound of the formula (I).
摘要:
The present invention relates to the use of at least one hydrophobin or of a derivative thereof as a defoamer in additive compositions or fuels, to a process for defoaming fuels, to an additive and fuel composition comprising at least one hydrophobin or derivative thereof and at least one further fuel additive, and to a process for preparing at least one fuel composition.