Acrylic Acid Catalyst Water Content Control
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Solution Overview
Problem
There is a lack of effective methods for storing catalysts used in producing acrylic acid, leading to potential performance failures due to inadequate storage conditions, particularly in newly constructed industrial reactors where catalysts may be stored for extended periods.
Innovation Solution
A catalyst comprising molybdenum and vanadium with a controlled water content range of 0.01 to 0.53 mass % is developed, along with a method for producing acrylic acid using this catalyst, ensuring maintained catalytic performance even after storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the catalyst is stored for extended periods (1-10 years) in industrial reactors, then the catalyst may be needed for emergency spare use, but the catalytic performance may deteriorate due to inappropriate storage conditions and hygroscopicity
Solution Approach 1:
The invention controls the water content parameter of the catalyst within a specific range (0.01-5 mass%) to maintain catalytic performance during long-term storage. This parameter control prevents hygroscopicity-related deterioration while allowing extended storage periods for emergency spare use.
Solution Approach 2:
The catalyst is prepared with predetermined water content before storage to prevent performance deterioration. By establishing the appropriate water content level in advance (0.01-5 mass%), the catalyst is protected against hygroscopicity issues that would otherwise occur during long-term storage.
2Ease of manufacture
If the catalyst is stored without controlled water content, then storage is simpler, but the catalyst fails to achieve desired performance after storage
Solution Approach 1:
By specifying a concrete water content range (0.01-5 mass%), the invention transforms the storage process from a simple empirical operation into a controlled process with defined parameters. This maintains catalytic performance while providing clear storage guidelines.
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 catalyst maintains its performance equivalent to that at production completion, even after extended storage, by adjusting the water content within the specified range, preventing hygroscopicity-related issues and ensuring reliable spare use.
Implementation Method 1
the catalyst used for producing methacrylic acid from methacrolein, which is the similar reaction, is a chemical substance called a heteropoly acid, and the hygroscopicity thereof is widely known
Data Source
AI summary
The present invention clarifies the characteristic of the hygroscopicity of the catalyst for producing acrylic acid and finds out a relationship between the water amount of the catalyst and the catalytic performance as the catalyst for producing acrylic acid, and provides an excellent catalyst. Provided is a catalyst for producing acrylic acid, which contains molybdenum and vanadium as essential active components, in which the amount of water contained in the catalyst is 0.01 mass % or more and 0.53 mass % or less.