Hydrogen Halide Sulfone Alkylation Catalyst
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The use of hydrofluoric acid as an alkylation catalyst in hydrocarbon conversion processes is limited by its high toxicity and corrosive nature, leading to safety concerns due to its high vapor pressure, which complicates handling and exposure control.
Innovation Solution
A catalyst composition comprising a hydrogen halide and a sulfone, with the sulfone present in an amount less than 50 weight percent and a weight ratio of hydrogen halide to sulfone of at least 1:1, effectively reducing vapor pressure and maintaining high-quality alkylate production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hydrofluoric acid is used as an alkylation catalyst, then high-quality alkylate with high octane value is produced, but the vapor pressure is high causing safety concerns and handling difficulties
Solution Approach 1:
The patent combines hydrofluoric acid with a sulfone compound (such as sulfolane, dimethyl sulfone, or diethyl sulfone) to create a mixed catalyst system. The sulfone component acts as a vapor pressure depressant that reduces the overall vapor pressure of the catalyst mixture while maintaining the alkylation activity and selectivity provided by the hydrofluoric acid, thereby producing high-quality alkylate with reduced safety hazards
Solution Approach 2:
The sulfone compound serves as an intermediary substance that modifies the physical properties of the hydrofluoric acid catalyst system. It mediates between the need for high catalytic activity (provided by HF) and the need for low vapor pressure (achieved through sulfone addition), allowing the system to function effectively while reducing harmful vapor emissions
2Productivity
If hydrofluoric acid is used as an alkylation catalyst, then effective reaction rates are achieved, but the corrosive nature and toxicity create handling and exposure control problems
Solution Approach 1:
The patent combines hydrofluoric acid with a sulfone compound (such as sulfolane, dimethyl sulfone, or diethyl sulfone) to create a mixed catalyst system. The sulfone component acts as a vapor pressure depressant that reduces the overall vapor pressure of the catalyst mixture while maintaining the alkylation activity and selectivity provided by the hydrofluoric acid, thereby producing high-quality alkylate with reduced safety hazards
Solution Approach 2:
The sulfone compound serves as an intermediary substance that modifies the physical properties of the hydrofluoric acid catalyst system. It mediates between the need for high catalytic activity (provided by HF) and the need for low vapor pressure (achieved through sulfone addition), allowing the system to function effectively while reducing harmful vapor emissions
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 hydrogen halide and sulfone catalyst composition significantly lowers vapor pressure, enhancing safety while maintaining effective reaction rates and producing high-quality alkylates suitable for gasoline blending, thus overcoming the limitations of hydrofluoric acid.
Implementation Method 1
the use of hydrofluoric acid as an alkylation catalyst has certain drawbacks. One of the primary problems with the use of hydrofluoric acid as an alkylation catalyst is that it is a highly corrosive substance and it is toxic to human beings. The toxicity of hydrofluoric acid to human beings is further complicated by the fact that anhydrous hydrofluoric acid is typically a gas at normal atmospheric conditions of one atmosphere of pressure and 70° F. It is possible for the vapor pressure of hydrofluoric acid at standard atmospheric conditions to create certain safety concerns when it is exposed to the atmosphere.
Implementation Method 2
the alkylation of olefins by saturated hydrocarbons, such as isoparaffins, is accomplished by contacting the reactants with an acid catalyst to form a reaction mixture
Data Source
AI summary
A novel alkylation catalyst is described which is used in processes for alkylating olefin hydrocarbons with isoparaffin hydrocarbons to produce high octane alkylate products suitable for use as a blending component of gasoline motor fuel. The novel catalyst comprises a mixture of a hydrogen halide and a sulfone. The novel alkylation catalyst is utilized in a novel process for alkylating olefin hydrocarbons with isoparaffin hydrocarbons.