head_bg

Products

OEM/ODM Factory Pharma Grade Anhydrous Betaine 98% - Dibenzoylmethane (DBM) – MingXing

Short Description:


Product Detail

Product Tags

Related Video

Feedback (2)

We can easily usually fulfill our respected customers with our very good top quality, very good price tag and excellent support due to we have been more expert and much more hard-working and do it in cost-effective way for Fire Fighting Chemicals, Bismaleimide (BMI), L-tyrosine,N-acetyl, We are highly aware of quality, and have the certification ISO/TS16949:2009. We are dedicated to supply you high quality products with reasonable price.
OEM/ODM Factory Pharma Grade Anhydrous Betaine 98% - Dibenzoylmethane (DBM) – MingXing Detail:

Quality index:

Appearance: light yellow crystalline powder

Content: ≥ 99%

Melting point: 77-79 °C

Boiling point: 219-221 °CMM Hg

Flash point: 219-221 °C / 18mm

Instruction:

1. It is widely used as a kind of nontoxic thermal stabilizer for PVC and 1,3-diphenyl acrylonitrile (DBM). As a new auxiliary heat stabilizer for PVC, it has high transmittance, non-toxic and tasteless; it can be used with solid or liquid calcium / zinc, barium / zinc and other heat stabilizers, which can greatly improve the initial coloring, transparency, long-term stability of PVC, as well as precipitation and “zinc burning” during processing. Widely used in medical, food packaging and other non-toxic transparent PVC products (such as PVC bottles, sheets, transparent films, etc.).

2. Introduction of calcium and zinc stabilizers: (traditional stabilizers such as lead salt stabilizers and cadmium salt stabilizers) have the disadvantages of poor transparency, initial color difference, easy cross contamination and toxicity. Zinc and cadmium are non-toxic stabilizers. It has excellent thermal stability and lubricity, excellent initial coloring and color stability.

The thermal stability of pure calcium / zinc stabilizer is poor, so a variety of compounds should be compounded according to the processing technology and application of the product. Among the auxiliary stabilizers, β – diketones (mainly stearoyl benzoyl methane and dibenzoyl methane) are indispensable in calcium / zinc composite stabilizers.

Synthetic method

The original industrial production process was as follows: using solid sodium methoxide as catalyst, acetophenone and methyl benzoate were reacted by Claisen condensation in xylene to obtain dibenzoylmethane. Because the solid sodium methoxide powder is flammable and explosive, and it is easy to decompose when meeting with water, the solvent must be dehydrated before adding, and then the solid sodium methoxide must be added under the protection of nitrogen after cooling to 35 ℃. The reaction process must be protected by nitrogen, and the use of solid sodium methoxide has great potential safety hazard and great power consumption. The molar ratio of acetophenone: methyl benzoate: solid sodium methoxide was 1:1.2:1.29. The average one-time yield of the product was 80%, and the comprehensive yield of the mother liquor was 85.5%.

The new large-scale production process is as follows: 3000l xylene solvent is added to the reactor, 215kg solid sodium hydroxide is added, stirring is started, the temperature is raised to 133 ℃, and the low fraction water is evaporated; then 765kg methyl benzoate is added, the temperature is raised to 137 ℃, 500kg acetophenone is added dropwise, and the reaction temperature is kept at room temperature 137-139 ℃. With the addition of acetophenone, the feed liquid gradually becomes thicker. The by-product methanol is removed from the reaction process and the reaction proceeds in the positive direction. The mixed solvent of methanol and xylene is evaporated. Keep for 2 hours after dropping. When there is almost no distillate, the reaction ends.

Packing: 25kg / bag.

Storage precautions: store in cool, dry and well ventilated warehouse.

Annual capacity: 1000 tons / year


Product detail pictures:

OEM/ODM Factory Pharma Grade Anhydrous Betaine 98% - Dibenzoylmethane (DBM) – MingXing detail pictures

OEM/ODM Factory Pharma Grade Anhydrous Betaine 98% - Dibenzoylmethane (DBM) – MingXing detail pictures


Related Product Guide:

We usually think and practice corresponding for the change of circumstance, and grow up. We aim at the achievement of a richer mind and body as well as the living for OEM/ODM Factory Pharma Grade Anhydrous Betaine 98% - Dibenzoylmethane (DBM) – MingXing , The product will supply to all over the world, such as: Bulgaria, Hamburg, French, Further, we are supported by highly experienced and knowledgeable professionals, who have immense expertise in their respective domain. These professionals work in close coordination with each other to offer our clients an effective range of products.
  • It can be said that this is a best producer we encountered in China in this industry, we feel lucky to work with so excellent manufacturer.
    5 Stars By Rita from Greek - 2018.06.09 12:42
    With a positive attitude of "regard the market, regard the custom, regard the science", the company works actively to do research and development. Hope we have a future business relationships and achieving mutual success.
    5 Stars By Frances from Barbados - 2018.11.28 16:25
    Write your message here and send it to us