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Home > Catalyst and Auxiliary
According to the catalyst definition by the International Union of Pure Chemistry and Applied Chemistry (IUPAC) in 1981, a catalyst is a substance that alters the reaction rate without affecting the Gibbs free energy of the overall standard reaction. Catalysts span diverse types: liquid and solid catalysts based on state, and homogeneous versus heterogeneous catalysts based on phase state within the reaction system. In industrial processes, auxiliaries like centrifuge catalysts enhance production processes, improve product quality, or enable specific application performance. The array of auxiliaries definition is extensive, with varied performance - optimal effects stem from proper usage. ECHEMI's "Catalyst and Auxiliary" section predominantly supplies raw materials for Catalyst and Auxiliary.

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1185 Catalyst and Auxiliary items

Rosin X

CAS No: 85026-55-7

Formula: C15H20O6

Categories: Catalyst and Auxiliary > Polymer

Rosin is isolated from pine wood or pine stumps, Rosin is a frequent contact allergen which induces allergic contact dermatitis[1].More

Benzoyl chloride

CAS No: 98-88-4

Formula: C7H5ClO

Categories: Catalyst and Auxiliary > Skin Conditioning

Transparent, colorless liquid; pungent odor; vapor causes tears. Soluble in ether and carbon disulfide; decomposes in water. Combustible. Benzoyl chloride is a colorless to slight brown liquid with a strong, penetrating odor.More

Activated charcoal

CAS No: 64365-11-3

Categories: Catalyst and Auxiliary > Water Softener

Activated carbon is a carbon material with great specific surface area and decolorization ability. In the 19th century, people apply sugar, wine and water for decolorization, de-flavor and purification. There is a history of 100 years for bone charcoal to be used for water filtration. During the First World War, it has begun to produce activated carbon as gas masks. To the 20th century, 90 years, the activated carbon has also gotten wide application in the sewage treatment, organic solvent concMore

Petroleum

CAS No: 8002-05-9

Categories: Catalyst and Auxiliary > Dissolving Agent

Rubber solvent is a clear, colorless, and flammable liquid,somewhat less volatile than petroleum ether.More

Oxazole

CAS No: 288-42-6

Formula: C3H3NO

Categories: Catalyst and Auxiliary > Fluorescent Brightener

ColorlesstolightyellowliquiMore

Poly(acrylic acid)

CAS No: 9003-01-4

Formula: (C3H4O2)x

Categories: Catalyst and Auxiliary > Film Forming

Poly(acrylic acid) is either a white powder or a viscous liquid, depending on its molecular weight. Soluble in water, form a colloidal solution, with good chemical stability. Store in a cool, dry place away from strong alkalis and oxidants.More

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Petroleum resins

CAS No: 64742-16-1

Formula:

Categories: Catalyst and Auxiliary > Polymer

Petroleum resin is named because it is derived from petroleum derivatives. It has low acid value, good miscibility, water resistance, ethanol resistance and chemical resistance. It is chemically stable to acids and alkalis, and has good viscosity adjustment and thermal stability. Features. Petroleum resin is generally not used alone, but as an accelerator, regulator, modifier and other resins. Mainly used as a binder in the rubber industry, but also in coatings, printing inks, etc.More

Formaldehyde-phenol copolymer

CAS No: 9003-35-4

Formula: (C6H6O.CH2O)x

Categories: Catalyst and Auxiliary > Film-Forming Material

Formaldehyde-phenol copolymer is a thermosetting resin derived from the polymerization of formaldehyde and phenol. This copolymer exhibits excellent thermal stability, high mechanical strength, and resistance to moisture and chemicals. It has a rigid structure that enhances its durability and makes it suitable for various applications. The copolymer is typically used in a variety of formulations due to its superior bonding properties and ability to withstand heat.More

Paraformaldehyde

CAS No: 30525-89-4

Formula:

Categories: Catalyst and Auxiliary > Plastic Rubber Chemicals

Paraformaldehyde is a white crystalline solid.Irritating odor. The term “trioxane” applies specifically tothis trimer (CH2O)3 but paraformaldehyde is applied bothto trioxane and other low polymers or oligomers of formaldehyde.More

Azodicarbonamide

CAS No: 123-77-3

Formula: C2H4N4O2

Categories: Catalyst and Auxiliary > Antioxidants

orange crystalline powderAzodicarbonamide is a synthetic chemical that exists at ambient temperature as a yellow-orange crystalline solid. Azodicarbonamide is mainly used as a blowing agent in the rubber and plastics industries in the expansion of a wide range of polymers, including polyvinyl chloride, polyolefins, and natural/synthetic rubbers. Azodicarbonamide is also used as a food additive, such as an aging and bleaching ingredient in cereal flour and as a dough conditioner in bread baking.More

Frequently Asked Questions

How to choose the right catalyst for your application?

When selecting a catalyst, it is important to consider the type of reaction, operating temperature, pressure, solvents involved, and desired selectivity. Other key factors include catalyst lifetime, regeneration ability, and compatibility with your process. On ECHEMI, you can browse a wide range of catalyst and auxiliary products and compare specifications from multiple global suppliers to find the best option for your needs.

What is a catalyst?

Synonyms for catalyst include accelerator, promoter, stimulant, etc. A catalyst is a substance that speeds up a chemical reaction without undergoing any permanent changes. According to the catalyst definition, it doesn't alter the thermodynamics or the catalyst meaning of the reaction, but it lowers the activation energy required for the reaction to occur. Basically, a catalyst facilitates the reaction process and increases the conversion rate without being consumed in the reaction itself. It may exist in a variety of forms, including enzymes, metals, or complex compounds.

How does a catalyst work?

The function of a catalyst is to provide an alternative pathway for a chemical reaction to take place. It reduces the activation energy required for the reaction to begin, thus speeding up the rate of the reaction. The catalyst apex is the point at which the catalyst's effect on the reaction reaches maximum efficiency. It diminishes existing chemical bonds or establishes intermediary structures, so simplifying the reaction process, consequently expediting the production of substances. This mechanism, often utilized by catalyst companies, leads to accelerated product formation.

Are enzymes catalysts?

Yes, according to the catalyst definition, enzymes are biological catalysts. Enzymes, considered protein-based catalyst synonym, facilitate biochemical reactions within living organisms. Within defined temperature and pH parameters, enzymes function as exceedingly efficient catalysts, diminishing the activation energy necessary for reactions to occur. These auxiliaries, when integrated into biological systems, demonstrate specificity and selectivity in catalyzing particular reactions, rendering them pivotal as key catalysts across diverse biological processes.

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