Patent
Production of olefin oligomer lubricants
TLDR
In this paper, a process for oligomerizing alpha olefins to produce hydrocarbon oligomers useful as lubricants and lubricant additives uses a catalyst comprising a supported reduced group VIB metal, preferably chromium, in the form of its oxide.Abstract:
A process for oligomerizing alpha olefins to produce hydrocarbon oligomers useful as lubricants and lubricant additives uses a catalyst comprising a supported reduced group VIB metal, preferably chromium, in the form of its oxide. The support is a mesoporous, inorganic, crystalline solid of unique structure, of novel pore geometry. The preferred forms of these mesoporous materials are characterized by substantially uniform hexagonal honeycomb microstructure, with uniform pores having a cell diameter greater than 13 Å, preferably in the mesoporous range of about 20-100 Å. The use of the catalysts made with the mesoporous support materials enables products of greater viscosity to be made as compared to the products from catalysts using amorphous supports. The catalyst is usually used under oligomerization conditions at a temperature of about 90° to 250° C. to produce liquid hydrocarbon oligomers in the lubricant range which have a branch ratio of less than 0.19 and high values of viscosity index.read more
Citations
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Production of high viscosity index lubricants
TL;DR: In this article, a two-stage hydrocracking-hydroisomerization process is used to convert petroleum wax feeds to high viscosity index lubricants by using a noble metal containing zeolite beta catalyst.
Patent
Polyalphaolefins and processes for forming polyalphaolefins
Daniel C. Knowles,Jesus R. Fabian,Vilen Kosover,Ferrarotti S Juzan,Brian E. Fox,Frank J. DeBlase +5 more
TL;DR: In this article, the authors present a process for polyalphaolefins (PAOs) and processes for forming PAOs. And they present reaction systems for performing the processes of the invention, to controlling PAO viscosity based on residence time, and to the removal of spent catalyst using a solid adsorbent particles.
Patent
Oligomerization of alpha-olefins over layered silicate compositions containing pillars of silica and group VIB metal oxide
TL;DR: In this article, a method for preparing alpha-olefin oligomers of superior lubricating properties by contacting an alpha-olfin feed under oligomerization conditions with a catalyst comprising an activated layered silicate containing silica and oxide of Group VIB metal, e.g., Cr, between its layers.
Patent
Catalytic oligomerization process using modified mesoporous crystalline material
TL;DR: In this article, a novel catalytic oligomerization catalyst and process for upgrading olefins employing new synthetic catalyst of ultra-large pore crystalline material is provided. But the new catalytic reaction is very selective, especially when conducted at temperature of 60° to 120° C.
Patent
Lubricating oil composition for transmissions
Masato Takahashi,Shigeki Matsui +1 more
TL;DR: In this article, the authors proposed a lubricating oil composition for transmissions consisting of a base oil, a synthetic oil and an extreme pressure additive, with a number average molecular weight of from 2,000 to 20,000 in respective specific amounts.
References
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Patent
High viscosity index synthetic lubricant compositions
TL;DR: In this paper, the authors described a liquid lubricant composition comprising C 30 -C 1300 hydrocarbons, said composition having a branch ratio of less than 0.19, weight average molecular weight between 300 and 45,000, molecular weight distribution between 1 an 5 and pour point below -15° C.
Patent
Process for manufacturing olefinic oligomers having lubricating properties
TL;DR: In this article, a process for oligomerizing alpha olefin to produce lubricant range hydrocarbon stock including the step of contacting said alpha Olefin with a supported solid reduced Group VIB (e.g., chromium) catalyst under oligomerization conditions at a temperature of about 90° to 250° C. to produce liquid lubricant hydrocarbon.
Patent
Silicoaluminophosphate crystallization using hydrolysis
TL;DR: Silicophosphoaluminates are crystallized from a two-phase reaction mixture comprising sources of silicon oxide, aluminum oxide, and phosphorus oxide and a suitable directing agent as mentioned in this paper.
Patent
Regeneration of reduced supported chromium oxide catalyst for alpha-olefin oligomerization
TL;DR: A process for producing liquid oligomers useful as lubricants from alpha-olefins feedstock, such as 1-decene, is described in this paper. The olefins are oligomerized over a supported and reduced metal oxide catalyst from Group VIB of the Periodic Table to produce the oligomers The chromium-on-silica oligomerization catalysts can be regenerated to allow repeated recycling of the catalyst with reduced losses in yield of the lubricant.
Patent
Crystalline silica compositions
TL;DR: In this paper, new crystalline silicas are synthesized from a sodium silicate or other silica source solution having a Na2O/SiO2 ratio of about 0.3 up to 7.7.