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Uses and synthesis of Butylated Hydroxytoluene Powder

Butylated Hydroxytoluene Powder is an excellent general-purpose phenolic antioxidant, non-toxic, non-flammable, non-corrosive, good storage stability, Butylated Hydroxytoluene Powder can inhibit or delay the oxidative degradation of plastics or rubbers to prolong the service life.Butylated Butylated Hydroxytoluene CAS 128-37-0 White or light yellow crystalline powder, soluble in benzene, toluene, methanol, ethanol, acetone, carbon tetrachloride, acetic acid, grease, ethyl ester and gasoline and other solvents, insoluble in water and dilute caustic soda solution.

Butylated Hydroxytoluene CAS 128-37-0 is an excellent antioxidant additive for all kinds of petroleum products, widely used in all kinds of lubricating oils, gasoline, paraffin and all kinds of raw material oils, preventing the rise of acid value or viscosity of lubricating oils and fuel oils. It can be used as food antioxidant and stabilizer in food grade plastics and packaged food to delay the rancidity of food.

Butylated Hydroxytoluene Raw Materials can also be used in polyethylene (PE), polystyrene (PS), PP (polypropylene), polyvinyl chloride, ABS resins, polyester, cellulose resins and foams (especially white or light-colored products), food-grade plastics, natural rubbers, synthetic rubbers (styrene-butadiene, nitrile, polyurethane, cis-butadiene rubber, etc.), animal and vegetable oils and fats, and food and cosmetics containing animal and vegetable oils and fats. The reference dosage is generally 0.1%-1.0%.

Butylated Hydroxytoluene Raw Materials is a chemical substance with the molecular formula C15H24O, which is mainly used as a food additive to delay the rancidity of food.

Applications / Functions of Butylated Hydroxytoluene Powder

Butylated Hydroxytoluene CAS 128-37-0 as a food additive, can effectively delay the rancidity of food; in the petroleum industry is a variety of lubricating oils, secondary processing of gasoline, paraffin and some other mineral oils, excellent antioxidants; in particular, the food-grade plastics and polymer materials used for packaging food, as well as natural rubber, synthetic rubber, white or light color. Antioxidant and stabilizer for natural rubber and synthetic rubber products

1. Butylated Hydroxytoluene Powder is used as antioxidant for rubber, plastic antioxidant, antioxidant for gasoline, transformer oil, turbine oil, animal and vegetable oils, foodstuffs and so on.
2. Butylated Hydroxytoluene Powder Plastic additives
3. Butylated Hydroxytoluene Raw Materials is an oil-soluble antioxidant widely used at home and abroad. Although it is more toxic, it has stronger antioxidant ability, good heat resistance and stability, no specific odor, no color reaction when meeting metal ions and other shortcomings, and the price is low, only 1/5 to 1/8 of BHA, our country is still used as the main antioxidant. Generally used with Butylated Hydroxytoluene Raw Materials, and citric acid or other organic acids as synergist. It can be used in edible fats and oils, fried foods, cookies, instant noodles, quick-cooked rice, canned nuts, dried fish products and preserved meat products, with a maximum use level of 0.2g/kg. It also has a certain antimicrobial effect, but it is weaker than BHA.
4. Butylated Hydroxytoluene CAS 128-37-0 can be used as feed antioxidant to protect vitamins in feed and prevent oxidative loss of fats and proteins.Butylated Hydroxytoluene CAS 128-37-0 also has certain antimicrobial effects. The maximum dosage is 150g/t. Butylated Hydroxytoluene Powder is an oil-soluble antioxidant widely used at home and abroad. Although the toxicity is large, but its antioxidant capacity is strong, heat-resistant and good stability, there is no specific odor, there is no metal ion color reaction and other shortcomings, and the price is low, only 1/8-1/5 of the BHA, our country is still used as the main antioxidant. Generally used with Butylated Hydroxytoluene Powder, and citric acid or other organic acids as synergist.
5. Butylated Hydroxytoluene Powder is used as general-purpose phenolic antioxidant. It is widely used in polymer materials, petroleum products and food processing industry.Butylated Hydroxytoluene Raw Materials is commonly used rubber antioxidant. It has a certain protective effect against heat and oxygen aging, and can also inhibit copper damage. Used alone, it has no ozone-resistant ability, but when used together with ozone-resistant agents and waxes, it can protect the vulcanized rubber from damage caused by various factors in the weather. It can also be used as a gelation inhibitor in styrene-butadiene rubber. The general dosage in rubber is 0.5-3 parts. When the dosage is increased to 3-5 parts, it will not spray frost. This product can also be used as a stabilizer for synthetic rubber after treatment and storage, and can be used in styrene-butadiene rubber, parabutadiene rubber, ethylene-propylene rubber, neoprene rubber and other types of rubber. Antioxidant 264 is an effective antioxidant in some polymer materials. It is an effective stabilizer in polyethylene, polyvinyl chloride (dosage 0.01-0.1%) and polyvinyl ether. Antioxidant 264 is an excellent antioxidant additive for various petroleum products. It has good oil solubility. It can also be used as antioxidant for food processing industry, and used in food containing more oil. The dosage in oil, butter, dried fish and shellfish products, fish and shellfish salted products, whale meat frozen products, etc. is less than 0.2 g/kg, and less than 0.75 g/kg in chewing gum. The uses of this product are impregnation method, direct mixing method, mixing method after dissolving in ethanol and spraying method. It is used as a legal feed additive in the U.S.A., Japan and the European Community. The European Community specifies that the maximum dosage in feed is 150 ppm, and it can be used in a variety of feeds.
6. Butylated Hydroxytoluene Raw Materials for Organic Synthesis
7. Butylated Hydroxytoluene CAS 128-37-0 is used as antioxidant and anti-gum additive for petroleum products, antioxidant for plastics and rubber.
8. Butylated Hydroxytoluene Raw Materials are used as antioxidants for petroleum products, fuels, rubber, plastics, food, feed, pharmaceuticals and so on.
9. Butylated Hydroxytoluene CAS 128-37-0 Organic synthesis. Antioxidant

Butylated Hydroxytoluene Powder properties and stability

Butylated Hydroxytoluene CAS 128-37-0 White crystal. The color turns yellow when exposed to light, and gradually becomes darker. Soluble in benzene, toluene, methanol, methyl ethyl ketone, ethanol, isopropanol, petroleum ether, linseed oil, insoluble in water and caustic soda solution at 10℃.

Production method of Butylated Hydroxytoluene Powder

After gasification of isobutanol, dehydration reaction is carried out in the presence of catalyst to produce isobutene, and p-cresol alkylation reaction is obtained. kg/ton Isobutanol (95%) 1400 p-Cresol (80%) 1000

• (1) Butylated Hydroxytoluene Powder is prepared by combining p-cresol and tert-butanol. P-cresol, tert-butanol according to 1:1.1 (molar ratio) into the reactor heated to dissolve, and then add the catalyst phosphoric acid, at 65-70 ℃ under strong stirring reaction. The reaction product was first washed with 10% sodium hydroxide solution to alkaline, and then washed with water to neutral. Remove the solvent by distillation, and then recrystallize the product by ethanol.
• (2) Butylated Hydroxytoluene Powder is prepared from p-cresol and isobutene. According to the chemical formula measurement of isobutylene into 98% of the p-cresol and 2% of the mixture of concentrated sulfuric acid, at 65-70 ℃ under the reaction of 5h, the conversion rate of p-cresol up to 95%. The acid was washed off with hot water at 60°C, and then washed successively with 10% NaOH and hot water to neutral to obtain the crude product. Dissolve the crude product in 50% ethanol at 80-90 ℃, and add 0.5% of thiourea, filter, dry and dry while hot to get the finished product. Yield 90%-95%, purity 99.5%, melting point greater than 69.5 ℃. The main and secondary towers are used in tandem process in industry. Firstly, p-cresol and catalyst are added into the main and secondary towers, the temperature of the main tower is controlled at 65-80℃, and the temperature of the secondary tower is controlled at 50-70℃. Isobutylene gas is introduced from the bottom of the main tower, most of which reacts with p-cresol in the main tower, while the remaining part comes out from the top of the main tower and enters the bottom of the secondary tower to further react with p-cresol. The reaction cycle of the main tower was controlled to be 4-5 h. When the reaction was finished, the isobutylene gas was stopped, 20% NaOH solution was added and bubbled with compressed gas. The neutralized alkylation product was separated by a distillation column (8 theoretical plates) to obtain the crude product. The latter was dissolved with 95% ethanol, ion-exchanged to remove inorganic salts, and cooled to 10-20°C for crystallization, separation, and vacuum drying to obtain a product with a melting point greater than 69°C.
• (1) P-cresol, tert-butanol according to the molar ratio of 1:1.1 into the reactor heated to dissolve. Under the action of catalyst phosphoric acid, the reaction at 65 ~ 70 ℃ under strong stirring; after the reaction is completed, the reaction product is first washed with 10% sodium hydroxide solution to alkaline, and then washed with water to neutral; remove the solvent, and then recrystallize with ethanol to obtain the finished product. CH3C6H4OH + (CH3)3COH [H3PO4] → BHT
• (2)Pass isobutene in a mixture of 98% p-cresol and 2% concentrated sulfuric acid, react at 65-70 ℃ for 5h; wash off the acid with hot water at 60 ℃, and then successively wash with 10% NaOH and hot water to neutral to get the crude product. Dissolve the crude product in 50% hot ethanol, and add 0.5% of thiourea, while hot, filtering, drying, drying that is the finished product, the yield is as high as 90% to 95%, purity 99.5%, melting point > 69.5 ℃. Industrial use of the main and secondary tower tandem process. First, p-cresol and catalyst are added to the main and secondary towers, and the temperature of the main tower is controlled at 65～80℃, and the temperature of the secondary tower is controlled at 50～70℃. Isobutylene gas is introduced from the bottom of the main tower, most of which reacts with p-cresol in the main tower, while the remaining part comes out from the top of the main tower and enters the bottom of the secondary tower to further react with p-cresol. The reaction cycle of the main tower was controlled at 4-5 h. When the reaction was finished, the isobutylene gas was stopped, 20% NaOH solution was added, and compressed gas was used for bubbling. The neutralized alkylation product was separated by a distillation column (8 theoretical plates) to obtain the crude product. The latter was dissolved in 95% ethanol, ion-exchanged to remove inorganic salts, and cooled to 10-20°C for crystallization, separation, and vacuum drying to obtain a product with a melting point greater than 69°C. CH3C6H4OH+(CH3)2C〓CH2[H2SO4]→BHT

Reaction of p-cresol with isobutene under pressure in the presence of catalyst concentrated sulfuric or phosphoric acid and dehydrating agent alumina. The product is distilled and recrystallized in ethanol to form Butylated Hydroxytoluene CAS 128-37-0.

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