The present invention relates to a process for preparing vinyl carboxylates, wherein a carboxylic acid is reacted with an alkyne compound in the presence of a catalyst which is selected from carbonyl complexes, halides and oxides of rhenium, of manganese, of tungsten, of molybdenum, of chromium and of iron and rhenium metal at a temperature of ≦300° C.
The process gives the desired vinyl esters with high yield.
[EN] OVERBASED SALTS OF ALKYLATED PHENOL OLIGOMERS AS LUBRICANT ADDITIVES<br/>[FR] SELS SURBASÉS D'OLIGOMÈRES DE PHÉNOL ALKYLÉS UTILISÉS EN TANT QU'ADDITIFS DE LUBRIFIANTS
申请人:CASTROL LTD
公开号:WO2018158099A1
公开(公告)日:2018-09-07
A salt of a compound comprising an aromatic group linked to an acyclic isoprenoid moiety derived from 3 to 6 isoprenyl units. The salt may be used as a detergent in a lubricating composition, e.g. for an internal combustion engine, and in associated uses and methods.
Lubricating compositions containing isoprene based components
申请人:CASTROL LIMITED
公开号:US10125335B2
公开(公告)日:2018-11-13
A lubricating composition comprising a base oil of lubricating viscosity and one or more lubricant additives, wherein the base oil comprises or consists of a base stock which comprises or consists of at least one isoprenoid compound comprising: (i) one or two oxygen-containing moieties independently selected from ether and ester moieties; (ii) a first acyclic isoprenoid moiety containing 1 to 5 isoprenyl units; and (iii) optionally, a second acyclic isoprenoid moiety containing 1 to 5 isoprenyl units with the proviso that at least one isoprenoid moiety contains 3 to 5 isoprenyl units where the isoprenoid compound contains a single ether moiety.
A simple and efficient method for selective construction of morphlin-2-one and morphlin-3-one heterocyclic derivatives has been developed from N-substituted aminoethanols and divinyl fumarate. The selectivity of this catalyst-free reaction was easily controlled by different solvents.
The present invention relates to a process for preparing ethers, particularly unsymmetrical ethers, and preferably ethers suitable for use as base stocks for lubricant compositions. In particular, the process involves the reaction of an α,β-unsaturated aldehyde with a trihydrocarbyl orthoester to form an α,β-unsaturated acetal and conversion of the α,β- unsaturated acetal to an ether through hydrogenation and hydrogenolysis.