4-hydroxybenzoic acid

4-hydroxybenzoic acid:Extreme soluble ether, dissolved in ethanol, methanol, do not dissolve in water.

4-hydroxybenzoic acid Preparation Methods : vegetable oil or oil feet of raw materials,

 using traditional methods (saponification acid,

acid hydrolysis or pressurized hydrolysis) made

of hydrolyzed vegetable oil fatty acids,

fatty acids from vegetable oil separated erucic acid.

Right mixed fatty acids used in refrigeration, exploited,

after the initial separation,

and then uses vacuum distillation can be more pure erucic acid. purposes : erucic acid little direct use,

mainly for the fine chemical intermediates,

used for extracting various surfactants, lubricants,

plasticizers, emulsifiers, softener, waterproof agent cleaner.

Erucic Acid  Specification:

                                         DP FC22-90 ,  Typical Data

Color(APHA),                             250max,    200

Content  wt%                             90min,    90.5

Melt point ,                                 28-32,    30

Saponification Value mg KOH/g, 163--171,    165.5

Acid number  mg KOH/g,            162--170,    163.5

Iodine Value mg I2/g,                  72--80,    75.5

4-hydroxybenzoic acid