Hydroisomerization Catalyst Coking Treatment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current hydroisomerization catalysts face challenges in achieving high isomerization selectivity, leading to inefficient production of lubricant base oils with desired properties such as high viscosity index and low pour point, due to cracking activity and limited applicability of feedstocks.
Innovation Solution
A hydroisomerization catalyst is produced by subjecting a catalyst with a one-dimensional porous structure and group 8 to 10 metals to a coking treatment with a carbon-containing compound, optimizing carbon content and micropore volume to inhibit cracking and enhance isomerization selectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a bifunctional catalyst with hydrogenation-dehydrogenation and isomerization functions is used for catalytic dewaxing, then normal paraffin conversion to isoparaffin is improved, but hydrocarbon cracking occurs leading to lightening of the hydrocarbon oil
Solution Approach 1:
The patent extracts and removes the cracking function from the catalyst system by using a monofunctional isomerization catalyst instead of a bifunctional catalyst. This isolation of the isomerization function alone prevents simultaneous cracking reactions, thereby eliminating the harmful side effect while maintaining the desired isomerization selectivity for converting normal paraffins to isoparaffins.
Solution Approach 2:
The patent applies local quality by selecting specific catalyst components with tailored properties - using metal components (Group 8-10 metals, Mo, or W) supported on molecular sieves with specific pore structures (one-dimensional pores including 10-membered rings). This localized optimization of catalyst structure at the molecular level enables high isomerization activity while suppressing cracking through controlled pore geometry and metal-support interactions.
2Manufacturing precision
If the degree of conversion of normal paraffins is increased to produce high-quality lubricant base oil, then viscosity index and pour point are improved, but lightening of hydrocarbon oil develops making efficient production difficult
Solution Approach 1:
The patent converts the potential harm of excessive conversion into a benefit by using a monofunctional isomerization catalyst that selectively isomerizes normal paraffins to isoparaffins without causing cracking. This allows achieving high conversion degrees (sufficient for high-quality lubricant base oil with high viscosity index and low pour point) while the isoparaffins remain in the desired molecular weight range, thus improving product quality without sacrificing production efficiency.
3Adaptability or versatility
If conventional catalysts are used for catalytic dewaxing, then isomerization function is provided, but cracking activity limits the applicability of feedstocks and restricts product yield
Solution Approach 1:
The patent achieves universality by developing a monofunctional isomerization catalyst with broad feedstock applicability. The catalyst system (metal components on molecular sieves with one-dimensional 10-membered ring pores) can effectively process various hydrocarbon feedstocks containing normal paraffins without being limited by cracking activity, thereby enabling versatile application across different feedstock types while maintaining high product yield through selective isomerization.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method results in a catalyst with improved isomerization selectivity, enabling efficient production of lubricant base oils with high yield and desired properties, suitable for producing high-quality lubricant base oils like Group II, III, and III+ grades.
Implementation Method 1
subjecting a catalyst with a one-dimensional porous structure and group 8 to 10 metals to a coking treatment with a carbon-containing compound, optimizing carbon content and micropore volume
Implementation Method 2
catalytic dewaxing has been known, for example, in which hydrocarbon oil is contacted with a catalyst known as a bifunctional catalyst, which has a hydrogenation-dehydrogenation function and an isomerization function, in the presence of hydrogen to isomerize normal paraffin contained in hydrocarbon into isoparaffin
Implementation Method 3
a support having a one-dimensional porous structure including a 10-membered ring
Data Source
AI summary
A method for producing a hydroisomerization catalyst according to the present invention includes: a first step of preparing a catalyst to be treated, which contains a support having a one-dimensional porous structure including a 10-membered ring and at least one metal selected from the group consisting of: group 8 to 10 metals of the periodic table, Mo, and W supported on the hydroisomerization catalyst; and a second step of producing a hydroisomerization catalyst having a carbon content of 0.4 to 2.5% by mass by subjecting the catalyst to be treated to a coking treatment by means of a carbon-containing compound.