JAMMARK INTERNATIONAL TRADINGE(ZIBO) CO., LTD. is one of the most professional manufacturers and suppliers of dipropylene glycol in skincare in China. If you're going to buy high quality dipropylene glycol in skincare made in China, welcome to get more information from our factory. For price consultation, contact us.

 

Product Specification

Dipropylene glycol in skincare Item	Specification
Viscosity	mPa.s (20℃)：107
Surface Tension	mN/m(25℃)：32.0
Upper Explosive Limit	%(V/V)12.7
Lower Explosion Limited	%(V/V)2.9

 

Product uses

1. Key Roles of Dipropylene Glycol in Cosmetics

• ‌Primary function‌: Coupling agent & moisturizer in skincare formulations‌
• ‌Perfumery dominance‌: >50% usage in fragrance applications‌
• ‌Typical concentration‌: ≤10% by weight in other products‌

2. Specific Applications

• ‌Hair care‌: Curling solutions
• ‌Skincare‌: Cleansers (cold cream, bath gel), moisturizers, lipsticks
• ‌Hygiene products‌: Deodorants, hand/body lotions

3. Industrial Relevance

• ‌Solvent synergy‌: Enhances compatibility in water-based systems (e.g., latex coatings)‌
• ‌Safety‌: Non-volatile, stable for diverse formulations‌

 

Product package

25kg/Drum 215KG per barrel of  dipropylene glycol in skincare.

Manufacturing method of dipropylene glycol

Prepared by the condensation reaction of 1,2-epoxypropane with 1,2-propanediol in the

presence of 85% sulfuric acid. The reaction solution is neutralized with sodium hydroxide

solution, filtered, distilled under reduced pressure, and then distilled at atmospheric pressure.

The 229-233 ℃ fraction is collected to obtain dipropylene glycol.

When 1,2-epoxypropane hydrates to produce propylene glycol, dipropylene glycol is a

byproduct.

Dipropylene glycol has low toxicity and minimal skin irritation. Rat oral LD50 14.85 ml/kg,

not absorbed through the skin.Dipropylene glycol in skincare.

The continuous vacuum distillation of dipropylene glycol adopts a three tower linkage

operation, which has high efficiency, low energy consumption, and stable product quality.

The specific operation is as follows.Dipropylene glycol in skincare.

1. The crude dipropylene glycol synthesized by the operation of the propylene glycol

distillation tower (with DPG and TPG contents of about 50% and 10%) is pumped to the

horizontal kettle of the propylene glycol distillation tower. The gas phase is heated and

evaporated before entering the vertical kettle of the propylene glycol distillation tower.

The catalyst is enriched in the horizontal kettle and regularly returned to the catalyst

storage tank for recycling. The propylene glycol at the top of the tower is returned to

the synthesis system. Control the steam pressure of the horizontal kettle at 0.6-0.7MPa,

control the steam pressure of the vertical kettle at 0.6-0.7MPa, the vacuum degree inside

the tower is -98kPa, the reflux ratio is 3-4, and the top temperature of the tower is controlled

at around 110 ℃. At this time, the propylene glycol content obtained reaches 99%. The

temperature of the vertical kettle is controlled at around 135 ℃, and the content of propylene

glycol is less than 0.2%. The content of dipropylene glycol and tripropylene glycol is about 86%

and 13% respectively. This mixed material is pumped to the middle tank of the kettle.

2. The mixed material of the propylene glycol distillation tower is transported by a pump

to the tower (the feeding position is from the middle of the tower). The heating method of

the tower kettle adopts a falling film reboiler for circulating heating. The steam pressure

of the falling film reboiler is controlled at around 0.7 MPa, and the vacuum degree inside

the tower is -99 kPa. The top of the tower adopts full reflux or intermittent de lightening

(when the propylene glycol content in the mixed material is greater than 0.5). The

temperature in the tower reaches around 135 ℃, and the finished product with a content

of over 99.5% can be obtained. The comprehensive sample of the finished product can

be guaranteed to be around 99.7%. The temperature of the tower kettle is controlled at

around 170 ℃, and the content of propylene glycol is less than 5%. This mixed material

is pumped to the middle tank of the kettle.

3. The mixed material in the operation of the propylene glycol distillation tower is transported

by a pump to the tower (the feeding position is from the middle of the tower). The tower kettle

is heated by a falling film reboiler for circulating heating. The steam pressure of the falling film

reboiler is controlled at around 0.8 MPa, the vacuum degree inside the tower is -99 kPa, the

reflux ratio at the top of the tower is controlled at 4-5, and the middle temperature reaches

around 160 ℃ to produce propylene glycol products with a content of over 99%. After heavy

separation and enrichment in the tower kettle, it is regularly output to the intermediate tank.

The industrial vacuum distillation production of dipropylene glycol is carried out using a three

tower continuous process, which is easy to operate, avoids the processes of feeding, heating,

and de lightening, and saves a lot of time; The content of each point during the operation is

guaranteed, the comprehensive separation effect of materials is good, and the quality of the

finished product is improved; Increased production and reduced energy consumption. From

this, it can be seen that compared to the three tower intermittent vacuum distillation, the three

tower continuous vacuum distillation has an absolute advantage and will become the first

choice for industrial vacuum distillation production of dipropylene glycol.