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Catalytic dewaxing for low-sulfur or sulfur-containing environments configured in switching mode

A technology for catalytic dewaxing and dewaxing, which is used in the preparation of liquid hydrocarbon mixtures, hydrocarbon oil treatment products, and hydrocarbon oil treatment, and can solve problems such as sulfur content sensitivity

Inactive Publication Date: 2015-11-25
EXXON RES & ENG CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, many conventional catalytic dewaxing processes are sensitive to the sulfur content of the feedstock

Method used

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  • Catalytic dewaxing for low-sulfur or sulfur-containing environments configured in switching mode
  • Catalytic dewaxing for low-sulfur or sulfur-containing environments configured in switching mode
  • Catalytic dewaxing for low-sulfur or sulfur-containing environments configured in switching mode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0094] In a first embodiment, a method of producing a lubricant base stock is provided. The method includes providing a processing train including a first catalyst being a hydrotreating catalyst and a second catalyst being a dewaxing catalyst. A first feedstock is processed in said processing train under first hydrotreating conditions and first catalytic dewaxing conditions to produce a total liquid product with a pour point of less than about -15°C and a yield of 700°F+ (371°C) For the low-sulfur dewaxing stage, the yields are similar or better than those produced by using conventional dewaxing catalysts, and for the sulfur-containing dewaxing stage, using the catalyst of the present invention, The yield is at least 10 wt % higher, or at least 15 wt % higher, or at least 17 wt % higher than that produced using conventional dewaxing catalysts. The first catalytic dewaxing conditions comprise a temperature of about 400°C or less, and the first hydrotreated feedstock has a Wppm...

Embodiment 1~5

[0151] Processing Example 1 ~ 5-catalyst, feed and processing conditions:

[0152] Table 1 provides a description of the various 130N raffinate hydroconversion (RHC) product feeds used. In some cases, the feed was spiked with Sulfrzol54 and octylamine to simulate no separation stage between the hydrotreating stage and the dewaxing stage (simulating a direct cascade) or to have at least one High-pressure separation stage (simulation of high-pressure separation).

[0153] Table 2 provides parameters for the various dewaxing catalysts used.

[0154] Table 3 provides a description of the various dewaxing catalysts used.

[0155] Table 4 provides preliminary lubricant base stock specifications.

[0156] Table 1

[0157]

[0158]

[0159] *130N raffinate hydroconversion (RHC) product spiked with Sulfrzol54 and octylamine

[0160] Table 2

[0161]

[0162] table 3

[0163]

[0164] Processing Experiment #1 Carried out under the following conditions: Simul...

Embodiment 1

[0187] Catalyst Example 1. In 65 / 35ZSM-48 (90 / 1SiO 2 :Al 2 O 3 ) / TiO 2 Up 0.6% by weight Pt(IW)

[0188] Will 65%ZSM-48 (90 / 1SiO 2 :Al 2 o 3 ) and 35% titanium dioxide were extruded to obtain 1 / 16" quadrulobe (quadrulobe). The extrudate was 2 Precalcination at 1000°F, ammonium exchange with 1 N ammonium nitrate, and subsequent drying at 250°F followed by calcination in air at 1000°F. The extrudates were then loaded with 0.6 wt% Pt by incipient wetness impregnation with platinum tetraammine nitrate, dried at 250°F, and calcined in air at 680°F for 3 hours. Table 5 provides via N 2 Surface area of ​​extrudates obtained by porosimetry.

[0189] The activity of the above catalysts was determined using a batch micro-autoclave system. The catalyst was reduced under hydrogen followed by the addition of 2.5 g of 130N feed (cloud point 31). The reaction was run at 330°C for 12 hours at 400 psig. Cloud points were determined for two feed space velocities. The resu...

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Abstract

Sweet and sour lubricant feeds are block and continuous processed to produce lubricant basestocks. Total liquid product yields at a desired pour point are maintained for catalytic dewaxing of both sweet and sour conditions. The desired pour point is achieved for both the sweet and sour feeds by varying the catalytic dewaxing reaction temperature as a function of sulfur content entering the reactor.

Description

technical field [0001] The present invention provides a process for switching mode and continuous mode catalytic dewaxing of feeds having different sulfur contents for lubricant base stocks. Background technique [0002] Catalytic dewaxing can be used to improve the cold flow properties of hydrocarbon feeds. This may allow the production of lubricant base stocks with improved properties. Unfortunately, many conventional catalytic dewaxing processes are sensitive to the sulfur content of the feedstock. Using this conventional dewaxing process, the sulfur and / or nitrogen content of the feedstock is reduced to low levels, eg, less than 100 wppm sulfur, prior to catalytic dewaxing. Often, sulfur and / or nitrogen levels need to be reduced to maintain catalyst activity and achieve the desired yield of lubricant base. [0003] US Patent 5,951,848 provides a process for treating a hydrocarbon feedstock by first exposing the hydrocarbon feedstock to a highly active hydrotreating ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/00
CPCC10G65/043C10G45/64C10G2300/1062C10G2300/202C10G2300/207C10G2300/304C10G2300/4006C10G2300/4025C10G2400/10
Inventor 克里斯塔·M·普伦蒂斯米歇尔·A·达格
Owner EXXON RES & ENG CO
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