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Structure Directing Agents (SDA)

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Structure Directing Agents (SDA) Specification

Loss on Drying
<1%

Molecular Formula
Varies (e.g., C6H18N2 for selected SDAs)

Particle Size
<50 m (for powders)

Residue on Ignition
<0.5%

Ph Level
6.0 - 8.5

Boiling point
>100C (varies by compound)

Molecular Weight
Varies by SDA type

Viscosity
50-300 cP (for liquids)

Storage
Store in cool, dry place, tightly sealed

Heavy Metal (%)
<0.001%

Melting Point
Varies by compound (Example: >200C for certain SDAs)

HS Code
382499

Place of Origin
India

Moisture (%)
<1%

Assay
>99%

Other Names
SDA, Template, Zeolite SDA

Type
Chemical Auxiliary Agent

Grade
Industrial/A.R. Grade

Usage
Zeolite Synthesis, Molecular Sieves, Catalysts

Purity
>99%

Appearance
Liquid or Powder

Application
Zeolite Manufacturing, Catalyst Template, Research

Raw Material
Organic Amines/Quaternary Ammonium Compounds

Smell
Characteristic Odor

Color
Colorless to Pale Yellow

Form
Liquid/Powder

Structure Directing Agents (SDA) Trade Information

Main Export Market(s)
Australia, Central America, South America, Western Europe, Middle East, Eastern Europe, Asia, North America, Africa

Main Domestic Market
All India

About Structure Directing Agents (SDA)

In order to direct the production of a certain structure, substances known as Structure Directing Agents (SDAs) are utilised in the synthesis of zeolites and other porous materials. When crystals are synthesised, these substances function as templates that interact with the developing crystals to encourage the creation of a particular crystal structure.

Zeolites are crystalline aluminosilicates having a three-dimensional network of linked channels and cages that give them the ability to selectively adsorb and catalyse different chemicals. SDAs are essential for the production of zeolites because the size, shape, and polarity of the SDA molecules employed determine the final product's structure.

Depending on their size, shape, charge, and hydrophobicity, SDAs can be either organic or inorganic molecules. Inorganic SDAs include metal ions and their complexes, while quaternary ammonium salts, amines, and imidazoles are the most often utilised organic SDAs.

The selection of SDA is important since it can affect the size and shape of the resultant crystals as well as their performance and characteristics during zeolite synthesis. The synthesis of zeolites has been transformed by the use of SDAs, enabling the development of new materials with innovative features and uses.

FAQ

1. What is a structure directing agent, first of all?

Ans - A chemical substance known as a Structure Directing Agent (SDA) is employed as a catalyst to change a material's physical composition. SDAs are used to regulate the crystallisation and shape of a material in a range of industrial processes, including those involving polymers, medicines, and ceramics.

2. What is the operation of a Structure Directing Agent?

Ans - SDAs control the growth and shape of crystals in order to function. The SDA will interact with the molecules of a substance when it is applied, making the molecules to arrange themselves into a particular crystal form. This enables the fabrication of materials with certain qualities to be done with greater precision.

3. Which examples of structure-directing agents come to mind?

Ans - Amphiphilic chemicals, organic molecules, and metal-organic frameworks are a few examples of Structure Directing Agents.

4. What advantages do Structure Directing Agents offer?

Ans - Increased control over a material's physical characteristics, such as its crystallinity, porosity, and thermal conductivity, may be possible with the use of SDAs. This may make it possible to produce materials with particular qualities more effectively.

5. Do Structure Directing Agents raise any safety issues?

Ans - Due to the potential toxicity or flammability of several of the chemicals used in SDAs, their use can raise some safety issues. As a result, it's crucial to use SDAs carefully, according to the manufacturer's recommendations, and take all essential safety measures.

Versatility in Zeolite Synthesis

SDAs are indispensable in the production of zeolites and molecular sieves, acting as templates that guide molecular architecture during synthesis. Their adaptability to different synthesis conditions and compatibility with organic and aqueous environments make them a preferred choice for researchers and manufacturers in catalyst development.

High Purity and Safety Assurance

With an assay and purity exceeding 99%, SDAs provide reliable performance with minimal impurities. These agents are non-toxic when used as recommended, ensuring safety in handling and industrial use. Their low heavy metal content and stringent quality controls support compliance with global standards.

Optimal Packaging and Shelf Life

SDAs are securely packaged in HDPE drums or barrels with options for 25 kg or 50 kg quantities, which protects the product integrity during transit and storage. They feature a shelf life of 24 months when stored in a cool, dry, and tightly sealed environment, assuring stability for extended application periods.

FAQ's of Structure Directing Agents (SDA):

Q: How are Structure Directing Agents (SDAs) typically used in zeolite synthesis?

A: SDAs serve as templates that facilitate the formation of specific zeolite frameworks by directing the organization of precursor chemicals during the synthesis process. Their molecular structure influences pore size and shape, resulting in tailored zeolite products for industrial and research applications.

Q: What are the main benefits of using SDAs in catalyst manufacturing?

A: SDAs enable precise control over the structural properties of catalysts, which enhances their efficiency and selectivity. Their high purity minimizes contamination risks, and their excellent solubility in water and organic solvents allows flexible integration into various synthesis methods.

Q: Where can SDAs be sourced for global operations and research projects?

A: SDAs are manufactured and exported from India and are globally available through standard and express shipping services. Reliable suppliers provide industrial and analytical reagent (A.R.) grade products suitable for both large-scale manufacturing and laboratory research.

Q: What is the recommended process for storing SDAs to maintain their quality?

A: To preserve SDA quality and shelf life, they should be stored in cool, dry areas in tightly sealed containers, preferably HDPE drums. Proper storage prevents moisture uptake and degradation, ensuring the product maintains its purity and efficacy over 24 months.

Q: When should SDAs be selected in the form of powder versus liquid for synthesis?

A: The choice between powder and liquid SDAs depends on specific synthesis requirements, process compatibility, and desired solubility. Liquid forms offer easier mixing for large-scale operations, whereas powders may suit precise dosing and systems requiring solid reagents.

Q: What parameters define the optimal SDA for a zeolite or catalyst application?

A: Selection should consider purity (>99%), molecular structure, pH stability (4.0-11.0), physical properties (viscosity, particle size, density), and compatibility with the precursor chemicals. Consulting product datasheets ensures the SDA type matches the desired framework and end-use.

Q: How does the use of SDAs benefit industrial manufacturing and research outcomes?

A: Using SDAs results in zeolites and catalysts with consistent, desirable properties, improving process performance and product quality. Their adaptability simplifies the synthesis process, reduces variability, and expands possibilities for novel material development.

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