Products
Specializing in the production of propargyl alcohol, 1,4 butynediol and 3-chloropropyne
1, 4-butanediol properties
Physical and chemical properties
Colorless oily liquid, flammable, soluble in water, methanol, ethanol, acetone, polyether and
polyester polyols, slightly soluble in ether, immiscible with aliphatic and aromatic hydrocarbons.
The purity of industrial products is generally greater than 99% or 99.5%, the moisture is less than 0.1%, the sulfur value is not more than 0.1%, the chroma (APHA) is less than 25.
There are more than 20 production methods of 1, 4-butanediol, but only 5 ~ 6 are actually industrialized. At present, the main industrialized methods include modified Reppe method, maleic anhydride hydrogenation method, maleic anhydride esterification hydrogenation method, propylene oxide method and butadiene method.
Characteristics and Uses
1, 4-butanediol is a basic chemical and fine chemical raw material, widely used in the production of PBT engineering plastics and fibers, Synthesis of tetrahydrofuran (THF), polytetramethylene ether diol (PTMEG, obtained by THF polymerization), polyether high performance elastomer and spandex elastic fiber (PTMEG and diisocyanate synthesis), unsaturated polyester resin, polyester polyol, butanediol ether solvent, as well as pharmaceutical and cosmetic industry. 1, 4-butanediol can also be used to produce N-methylpyrrolidone, adipic acid, acetal, maleic anhydride, 1, 3-butadiene and so on.
Y-butanolactone, the downstream product of 1, 4-butanediol, is the raw material for the production of 2-pyrrolidone and N-methylpyrrolidone products. From this, a series of high value-added products such as vinyl pyrrolidone and polyvinyl pyrrolidone are derived, which are widely used in the fields of pesticides, medicine and cosmetics.
In the field of POLYURETHANE, in addition to the synthesis of polytetrahydrofuran polyol, mainly used in the synthesis of polyester diol and used as elastomer, microporous polyurethane shoes chain extender, polybutanediol adipate ester polyurethane has good crystallization.
The toxicity of Low toxicity, acute toxicity value of oral LD50= 1500-1780mg /kg in rats, transdermal absorption toxicity value of rabbit LD50>2000mg/kg.
