Dibutyl maleate (DBM), also known as dibutyl maleate, is a polymer monomer with a wide range of uses and an important chemical raw material. It is often used as a co-polymerization agent, Lubricants and plasticizers. The industrial use of sulfuric acid to catalyze the synthesis of dibutyl maleate has problems such as complex process, serious equipment corrosion, and serious “three wastes” pollution. Therefore, researchers continue to explore new catalysts to replace sulfuric acid, such as sulfonic acid, inorganic salts, and solid superacids. , heteropoly acid, molecular sieve.
Dibutyl Maleate Property
Melting point
-85°C
Boiling point
281 °C(lit.)
density
0.988 g/mL at 25 °C(lit.)
vapor pressure
0.0027 hPa (20 °C)
refractive index
n20/D 1.445(lit.)
Fp
>230 °F
storage temp.
Sealed in dry,Room Temperature
solubility
0.17g/l slightly soluble
form
Liquid
color
Clear colorless to light yellow
explosive limit
0.5-3.4%(V)
Water Solubility
insoluble
Dibutyl Maleate Uses
Dibutyl maleate is utilized as a resources for artificial materials and also coverings, in addition to impregnants, dispersants, lubricants, and so on in the oil market, fabrics, plastics, as well as paper industries. Plasticizer for resins. Maleic acid esters are used as intermediates in organic synthesis, mostly for enhancement reactions on dual bonds. Such as Diels-Alder response with butadiene, cyclopentadiene, and so on, including hydrogen, nitrile, mercaptan, amine and also other compounds having active hydrogen, the popular surfactant dialkyl succinate sulfonate, It is prepared by the addition of sodium bisulfite. When other ammonia and amines are added to maleic acid ester, amidolysis (imidization) response happens due to aminolysis, which functions as an acylating agent. Diethyl maleate is widely utilized, as well as is likewise used as an intermediate in the manufacturing of high-efficiency pesticide marathon and various other chemicals and medicines, and can also be made use of in the production of polymer substances; dimethyl maleate, dibutyl ester, dioctyl Ester is an outstanding plasticizer for PVC; it can also be copolymerized with monomers such as plastic chloride and also vinyl acetate, and can be used as layers, adhesives, impregnants, dispersants, lubricants, etc for papermaking and also textiles; diisooctyl maleate Esters and also dinonyl maleate are good petroleum put point downers.
Preparation of Dibutyl Maleate
Method 1
Method 2
Method 3
Method 1
In a 100mL three-necked flask equipped with a water separator, add a certain amount of maleic anhydride, n-butanol and catalyst, and place it in a microwave reactor. Set a certain power and a certain microwave time of the microwave reactor to carry out microwave radiation reflux reaction. After the reaction is completed, wash with distilled water and saturated sodium carbonate solution several times, dry with anhydrous magnesium sulfate, and distill under reduced pressure to remove unreacted n-butanol, and finally collect the ester fraction to obtain a colorless and transparent oily liquid dibutyl maleate. Weigh and calculate the yield according to the following formula. The experimental results show that the optimal synthesis conditions of dibutyl maleate are: the ratio of maleic anhydride to n-butanol is 1:4, and the ionic liquid [HSO3-pmim]+[HSO4]- is used as the catalyst, and the dosage is 2.0g, microwave power is 600W, microwave time is 15min, the yield of dibutyl maleate can reach 99.36%. Under microwave irradiation, the activity of the catalyst ionic liquid [HSO3-pmim] + [HSO4]-reused 7 times did not decrease significantly, and the yield of dibutyl maleate was still higher than 96%, indicating that the catalyst had a good reaction activity and stability. Compared with conventional heating methods, microwave heating improves the reaction efficiency and shortens the reaction time.
Method 2
Add a certain amount of maleic anhydride, n-butanol, catalyst and water-carrying agent toluene into a three-necked flask equipped with a magnetic stirring bar, a thermometer, a water separator and a condenser, and heat to reflux for a certain period of time. After the reaction is finished, take a sample to measure its acid value after cooling slightly. Using GB1668-81 method to measure the change of acid value before and after the reaction, and calculate the esterification rate. The experimental results show that Zr(SO4)2/SiO2 is a good catalyst for the synthesis of dibutyl maleate, and the suitable catalyst preparation conditions are: zirconium sulfate loading 57%, calcination temperature 400℃, calcination time 2h. The suitable catalytic synthesis reaction conditions are: the molar ratio of anhydride to alcohol is 1:2.5, the amount of catalyst is 6% of the mass of maleic anhydride, water-carrying agent toluene is 8mL, and the reaction time is 2.0h. Under these conditions, the esterification rate of dibutyl maleate was 98.5%.
Method 3
A kind of synthetic method of dibutyl maleate, the synthetic method adopted is: add maleic anhydride, n-butanol, the reaction system that catalyst forms, use circulation pump and heat exchanger to carry out internal circulation heating, system vacuumizes Carrying out the reaction; wherein the reaction temperature is 80-130° C., and the reaction time is 3-4 hours. Operate as shown in Figure 1, add 98kg maleic anhydride, 111kg n-butanol, and 25kg hydrogen-type cation exchange resin to the reactor, heat up, open the condenser, and turn on the heat exchange after dissolving. Steam from the reactor, open the bottom valve of the reaction tank, transfer pump, turn on the internal circulation, open the condenser to vacuum, separate the generated water, control the reaction temperature in the tank at 90~125°C, react for 4 hours, distill, neutralize, Wash with water to obtain the product, detect the product, and the esterification rate is 99.3%.
About Products: If you need Dibutyl Maleate as a cosmetic raw material, please contact our service staff directly, and we will provide you with high-quality products at the best price. As an experienced manufacturer and supplier of Dibutyl Maleate, ZSpharmac will provide Dibutyl Maleate raw materials to customers all over the world for a long time. Over the years, the company has been adhering to the spirit of “integrity management, strict quality control, customer first”, and has won unanimous praise from domestic and foreign customers.
Company Profile and Corporate Culture
Company Profile：
ZhiShang Chemical is owned by ZhiShang Group is a professional new-type chemicals enterprise combined into research and development, production and sales .
The company’s competitive product is pharmaceutical raw materials and intermediates (especially carbohydrate derivatives Series), In recent years, the company has made a major breakthrough in food and feed additives, plant extraction, industrial chemicals industry .
The company insists on the spirit of “sincere management, strict quality control, customer as god” , get consistent high praise from customers at home and abroad.
Corporate Culture：
OUR MISSION Help China Chemicals to benefit the happiness of human life OUR VISSION Become the most trusted chemical supplier in the world OUR BUSINESS PHILOSOPHY Striver – oriented, enrich employees, customer first, deep service, seek development OUR VALUES Be prepared for danger in times of peace, forge ahead actively, unity and cooperation, and be brave to fight
About Us
The production base is located in Zhangqiu chemical industry park and Tai’an high-tech chemical industry park. laboratory and workshop in strict accordance with the GMP standard and the product fit national ISO9001 and ISO2000 standards.
“Zhishang” products are exported to Europe, North and South America, the Middle East, Asia Pacific and Africa area, so as to establish a long-term and stable cooperation relationship with customer in the world.
Company Info
Business Type: Manufacturer
Product Range: Cosmetic raw materials
Products/Service:Cosmetic raw materials (flavors and fragrances,antioxidant products, moisturizing and hydrating, whitening agents, cosmetic additives)
Factory Location : Diao Town Industry Park, Zhangqiu City, Jinan City, Shandong Province, China.
Service
Pre-Sales Service
* Prompt reply and 24 hours online, professional team to provide best price and high quality product.
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* Every batch of products will be tested to ensureits quality.
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*we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate. If your markets have any special requirements, let us know.
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FAQ
Do you accept sample order?
We will make samples before mass production, and after sample approved, we’ll begin mass production. Doing 100% inspection during production, then do random inspection before packing.
HOW TO CONFIRM THE PRODUCT QUALITY BEFORE PLACING ORDERS?
You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the samples. You can send us your product specifications and requests,we will manufacture the products according to your requests.
What’s your MOQ?
Our MOQ is 1kg. But usually we accept less quantity such as 100g on the condition that sample charge is 100% paid.
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Yes. We’ll give you product analysis report before shipping.
Is there a discount?
Different quantity has different discount.
Shipping
1. ≤50kg, Express delivery recommended, usually called as DDU service;
2. ≤500kg, Air shipping recommended, usually called as FOB, CFR, or CIF service;
3. >500kg, sea shipping recommended, usually called as FOB, CFR, or CIF service;
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