KR920016471A - Oligomerization of C_2-C_5 Olefins Using Reduction-Chromium Catalysts - Google Patents

Abstract

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Description

Oligomerization of C2-C5 Olefins with Reduction-Crop Catalysts.

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Claims (28)

A mixture of the catalyst and the C ₂ -C ₅ -alpha-olefins supported by a porous support treated with a reducing agent at a temperature and for a time sufficient to oxidize at a temperature of 200-900 ° C. in the presence of oxidizing gas and to reduce chromium to a low valence state A process for producing olefin oligomers, which are liquid hydrocarbons useful as lubricant base oils by contacting at temperatures between 0-250 ° C. and pressures of 10-34600 kPa. The method of claim 1, wherein the liquid olefin oligomer is distilled under conditions sufficient to recover the gasoline boiling range from the top fraction, the distillate boiling range from the top fraction, and the lubricating oil boiling range from the bottom fraction. The method of claim 1, further comprising hydrotreating the liquid olefin oligomer or its fraction under conditions sufficient to convert it to saturated hydrocarbon. The process according to claim 1 or 2, wherein the mixture of alpha-olefins consists mainly of propylene / ethylene between 10/1 molar ratios. The process of claim 1, wherein the reaction temperature is in the range of 90-250 ° C. 6. The method according to any one of claims 1 to 4, wherein the viscosity of the lubricant base oil is 3-5000 mm ² / s at 100 ° C. The process according to any one of claims 1 to 6, wherein the liquid hydrocarbon contains a olefinic hydrocarbon fraction of 6 to 25 carbon atoms useful as gasoline and distillate fuel. 8. The method of claim 1, wherein the oligomerization conditions further comprise adding an inert solvent such that the low viscosity lubricant base oil can be produced with a high viscosity index. The method of any one of claims 1-8, wherein the inert solvent is C ₆ -C ₁₂ saturated hydrocarbons. The process of any of claims 1-9, wherein the reducing gas is carbon monoxide, the oligomerization temperature is 100-200 ° C., the pressure is 790-2170 kPa, and the yield of the lubricating oil product having a viscosity of 100 ° C. higher than 35 mm ² / s is at least 35%. . The method of any one of claims 1-10, wherein the porous support is silica. The method of any of claims 1-11, wherein the reaction mixture is contacted in a fixed bed reactor or a continuous bed stirred tank reactor. The method of claim 2, further comprising hydrotreating the liquid olefin oligomer. The method of any one of claims 1-13, wherein the liquid oligomer contains about 40 weight% C ₃₀ + lubricating oil range oligomer. The process of claim 2 wherein the contact reaction is carried out at a temperature of 135 ° C. and a pressure of 520 kPa, the 100 ° C. viscosity of the column bottoms at least 90 mm ² / s and the viscosity index at least 80. The method of claim 1 or 2, wherein the alpha-olefin consists of propene or 1-butene. C ₃ -C ₅ alpha-olefins, C ₃ -C ₅ 1-olefins mixtures or C ₃ -C | ₅ A mixture of 1-olefins and ethylene is oligomerized under oligomerization conditions with an oligomer catalyst consisting of a reduced valence group VIB metal catalyst supported on a porous support, having a regio-irregularity of at least 20%. A liquid composition consisting of a phosphorus product. 18. The composition of claim 17, wherein the regio-irregularity is 20-60%. 19. The composition of claim 17 or 18, wherein the 1-olefin is 1-propylene or 1-butene or 1-pentene. The composition of claim 17, wherein the liquid product is an oligomerization product of at least one C ₃ -C ₅ 1-olefin or ethylene. The composition of claim 20 wherein the 1-olefin is 1-propylene and the propylene / ethylene molar ratio is 10: 1-1: 1. 18. The composition of claim 17, wherein the liquid product is an oligomerization product of at least one C ₃ -C ₅ 1-olipine produced at an oligomerization temperature of 90-250 ° C. The composition of claim 17, wherein the liquid product is an oligomerization product of ethylene with at least one C ₃ -C ₅ 1-olefin produced at an oligomerization temperature of 90-250 ° C. ₁₈ . The composition of claim 17, wherein the 100 ° C. viscosity is 3 mm ² / s-500mm ² / s. 18. The composition of claim 17, wherein the composition is hydrotreated after olefin oligomer formation. The composition of claim 17, wherein the liquid oligomer product consists of at least 40 weight percent C ₃₀ ⁺ lubricant range oligomer. 18. The composition of claim 17, wherein the catalyst consists of a reduced chromium metal oxide-porous support. The composition of claim 27 wherein the support is silica. ※ Note: This is to be disclosed by the original application.