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Catalyst and process using ssz-91 and zsm-12

a catalyst and catalyst technology, applied in the field of hydroisomerization, can solve the problems of increased chain cracking probability, loss of base oil/lube yield, and increased fuels yield, and achieve the effect of improving the cold properties of base oil products

Pending Publication Date: 2022-05-26
CHEVROU USA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is about a new catalyst and process for making dewaxed products, such as base oils, through hydroprocessing of a suitable feedstream. The goal is to improve the cold properties of the base oil products, such as the pour point and cloud point, while also providing other beneficial characteristics.

Problems solved by technology

Increased branching generally increases the probability of chain cracking, leading to greater fuels yield and a loss of base oil / lube yield.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

Hydroisomerization Catalyst Preparation

[0054]Hydroisomerization catalyst A (comparative) was prepared as follows: crystallite SSZ-91 was composited with Sasol Catapal® alumina to provide a mixture containing 65 wt. % SSZ-91 zeolite. The mixture was extruded, dried, and calcined, and the dried and calcined extrudate was impregnated with a solution containing platinum. The overall platinum loading was 0.6 wt. %.

example 2

Hydroisomerization Catalyst B Preparation

[0055]Hydroisomerization catalyst B was prepared as described for Catalyst A to provide a mixture containing 64 wt. % SSZ-91, 1 wt. % ZSM-12 and 35 wt. % Sasol Catapal® alumina. The dried and calcined extrudate was impregnated with platinum to provide an overall platinum loading of 0.6 wt. %.

example 3

Hydroisomerization Catalyst C Preparation

[0056]Hydroisomerization catalyst C was prepared as described for Catalyst A to provide a mixture containing 60 wt. % SSZ-91, 5 wt. % ZSM-12 and 35 wt. % Sasol Catapal® alumina. The dried and calcined extrudate was impregnated with platinum to provide an overall platinum loading of 0.6 wt. %.

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Abstract

An improved hydroisomerization catalyst and process for making a base oil product using a catalyst comprising SSZ-91 molecular sieve and ZSM-12 molecular sieve. The catalyst and process generally involves the use of a catalyst comprising an SSZ-91 molecular sieve combined with a ZSM-12 molecular sieve to produce dewaxed base oil products by contacting the catalyst with a hydrocarbon feedstock. The catalyst and process provide improved base oil cold properties, such as pour point and cloud point, along with other beneficial base oil properties.

Description

FIELD OF THE INVENTION[0001]A hydroisomerization catalyst and process for producing base oils from hydrocarbon feedstocks using catalysts comprising an SSZ-91 molecular sieve and a ZSM-12 molecular sieve.BACKGROUND OF THE INVENTION[0002]A hydroisomerization catalytic dewaxing process for the production of base oils from a hydrocarbon feedstock involves introducing the feed into a reactor containing a dewaxing catalyst system with the presence of hydrogen. Within the reactor, the feed contacts the hydroisomerization catalyst under hydroisomerization dewaxing conditions to provide an isomerized stream. Hydroisomerization removes aromatics and residual nitrogen and sulfur and isomerize the normal paraffins to improve the base oil cold properties. The isomerized stream may be further contacted in a second reactor with a hydrofinishing catalyst to remove traces of any aromatics, olefins, improve color, and the like from the base oil product. The hydrofinishing unit may include a hydrofin...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10G45/64B01J29/80B01J29/74B01J37/04B01J37/02B01J37/08C10M109/02C10M177/00
CPCC10G45/64B01J29/80B01J29/7461B01J29/7469B01J37/04B01J37/0201B01J2029/062C10M109/02C10M177/00C10G2400/10C10G2300/304C10G2300/302B01J37/088B01J23/42B01J29/7446B01J29/74C10G2300/202C10G2300/301C10G2300/308C10G2300/4006C10G2300/4012C10G2300/4018C10M2203/1006C10N2030/02
Inventor ZHANG, YIHUAOJO, ADEOLA FLORENCELEI, GUAN-DAO
Owner CHEVROU USA INC