Propylene Glycol Butyl Ether CAS 29387-86-8
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- Appearance: Colorless liquid
- Assay: 99. 0%min
- Stock: In stock
- Sample: Available
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Propylene Glycol Butyl Ether: The Complete Guide
Propylene Glycol Butyl Ether for Sale
|Chemical Name:||Propylene Glycol Butyl Ether|
|Other Name:||DOWANOL(TM) PNB; 1(or2)-butoxy-propano; 1,2-Propanediol,monobutylether; 1,2-Propanediolmonobutylether|
|Type:||Organic raw materials|
What is Propylene Glycol Butyl Ether?
Propylene glycol butyl ether is a green and environmentally friendly high-grade solvent, which has a wide range of main uses in coatings, cleaning agents, inks, leather, etc. It is one of the main components of brake fluid. Propylene glycol ether can also be used in colorful paints, photosensitive adhesives, PS plate cleaning, printing, electronic chemicals, jet engine fuel additives (water repellent), extractants and high boiling point solvents, etc. In the paint industry, it can be used as a solvent for alkyd resins, epoxy resins, acrylic resins, polyester paints, etc. The prepared paint has smooth, smooth and good fastness. In the process of dye dissolution, it can be used instead of alcoholic solvent, and it is a good coupling agent. In ink production, using propylene glycol ether, some formulations can be changed to water-soluble, which reduces the toxicity of the ink, improves the operating environment, and improves the printing quality. Propylene glycol ether products can be used to prepare various concentrated cleaning agents with good effect.
The molecular structure of propylene glycol butyl ether contains ether bonds and hydroxyl groups. The former is lipophilic and can be miscible with hydrophobic compounds, while the latter is hydrophilic and can be miscible with hydrophilic compounds, so it is called “universal solvent”. Propylene glycol butyl ether is one of the important products of the propylene glycol ether series. It is an excellent solvent and is widely used in coatings, pigments, inks, high-efficiency cleaning agents, printing, leather and electronic chemicals and other industries. Compared with ethylene glycol ether, the toxicity of propylene glycol ether is greatly reduced, so propylene glycol ether can effectively replace ethylene glycol ether, and is accepted by more and more users.
Propylene Glycol Butyl Ether Uses
Propylene Glycol Monobutyl Ether is primarily used in heavy duty cleaners. It dissolves and couples oils and fats excellently, making it useful in household and industrial formulations. Partially water soluble, can solubilize most solvents. Specific applications are as adheres to:
- Coupling agent and also solvent for household as well as industrial cleaners, grease paint cleaners, metal cleansers and also difficult surface area cleaners.
- Reliable coupling agent and also solvent for water-reducing coatings.
- Water-based latex finishings Effective coagulant.
- Energetic solvent for solvent-based coverings.
- Chemical intermediates for the production of esters, solvents, and plasticizers.
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Application of Propylene Glycol Butyl Ether
Propylene glycol butyl ether acetate (PBA for short), belonging to glycol ether ester products, is an organic solvent with environmental protection, high efficiency and excellent performance, widely used in paints, coatings, printing inks, synthetic Resin, binder, textile printing and dyeing and leather tanning agent and other industries. Propylene glycol butyl ether acetate is mainly prepared from propylene glycol butyl ether and acetic acid under the action of an acid catalyst.
Currently commonly used acid catalysts include sulfuric acid, ferric chloride, etc., but they will corrode the equipment, the product after the reaction will be dark in color, the product and the catalyst are not easy to separate, and its dehydration and oxidative properties will also lead to a series of side reactions. Traditional water-carrying agents such as toluene are teratogenic and carcinogenic, and it is urgent to develop catalysts and production processes that are easy to separate, less corrosive, and environmentally friendly to meet the needs of industrial production. It is of great significance for the actual industrialization of this product to study the feasible production route of synthesizing propylene glycol butyl ether acetate, optimize the production process and reduce the cost.
CN201810446362.1 developed a solid acid catalytic system, providing a method for synthesizing propylene glycol butyl ether acetate with easy separation of catalyst and product, low corrosion to equipment, economical reaction, clean and pollution-free. The object of the present invention is achieved like this: take propylene glycol butyl ether and acetic acid as raw material, take sec-butyl acetate as water-carrying agent, under the effect of solid acid catalyst S2O82-/ZrO2-SnO2, synthetic propylene glycol butyl ether acetate.
S2O82-/ZrO2-SnO2 solid acid catalyst is used, which does not dissolve during the reaction, and can be separated by filtration after the reaction is completed, reducing energy consumption. There are few side reactions, the product is not easily colored, the conversion rate of propylene glycol butyl ether is as high as 98.73%, and the yield of propylene glycol butyl ether acetate is 95.55%. The catalyst has high activity and can be reused.
Preparation of Propylene Glycol Butyl Ether
The propylene oxide method is the method for the synthesis of propylene glycol butyl ether generally adopted in the industry at present, and there are methods such as the Williamson method and the acetal method in addition, and the latter is less applied to actual industrialization due to various problems. At present, the synthesis of propylene glycol butyl ether by propylene oxide method is mainly studied at home and abroad from the two aspects of reactor and catalyst.
Dow Chemical Company of the United States has developed an insoluble polymer catalyst containing positive phosphorus ions (PR4+); BPChemicals has developed a metal perfluorosulfonic acid polymer catalyst for catalyzing the addition reaction of propylene oxide and methanol; Li Zhisong and others used phosphomolybdate modified Al2O3 as a catalyst, and adopted a new synthesis process of catalytic rectification for the synthesis of propylene glycol monobutyl ether.
Traditional homogeneous acidic or alkaline catalysts are generally used in industry, but this has led to problems such as corrosive equipment and difficult separation of catalysts from products, especially solid acid catalysts have poor selectivity and many by-products. Therefore, urgently need us to develop a kind of catalyst of high activity, environmental friendliness, improve industrial technology level and product quality.
CN201710832738.8 provides a method for synthesizing propylene glycol butyl ether. This method avoids the problems of corrosive equipment caused by traditional homogeneous acidity or alkalinity as a catalyst, and the catalyst is difficult to separate from the product. The method has simple process and low energy consumption. Moreover, the catalyst is easy to separate, reusable, energy-saving and environment-friendly.
The purpose of the present invention is achieved in this way: add n-butanol and catalyst into the reactor, seal and stir, replace the air in the reactor with N2, heat up to the set temperature, slowly feed propylene oxide, and control the reactor The internal temperature is basically constant, and the pressure in the reactor is controlled at 0.20-0.50MPa. After the propylene oxide is fed into the set mass, the reaction is continued at the set temperature until the internal pressure of the reactor is constant and remains unchanged within 30 minutes. The reaction is over. After cooling and discharging, the propylene glycol butyl ether product is obtained.
The invention has the advantages that: after the solid base catalyst used in the reaction catalyzes the reaction, the conversion rate of propylene oxide and the productive rate of propylene glycol butyl ether are all higher than the traditional catalyst NaOH used in industry. At the same time, it avoids the problems of traditional homogeneous catalysts such as corrosion of equipment and difficult product treatment. It has the advantages of high catalytic activity, good selectivity, recyclable catalyst, mild reaction conditions, easy separation from products, low energy consumption and small environmental pollution. .
- Butoxypropan-1-ol – PubChem
- CN201710832738.8 A method for synthesizing propylene glycol butyl ether
- CN201810446362.1 A kind of synthetic method of propylene glycol butyl ether acetate
Propylene Glycol Butyl Ether Suppliers and Manufacturers
As a propylene glycol butyl ether supplier and manufacturer with a strict standard product quality system certificate, Zhishang Chemical has long been providing the best propylene glycol butyl ether raw materials to customers all over the world.
Over the years, relying on professional team experience and customer-centric team concept to meet customer needs in a timely manner, our company enjoys a high reputation in the world. At present, our company has served more than 6,000 customers and has established long-term cooperative relations with customers from many countries.
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