Petroleum Wax & Vaseline Plant

PETROLEUM

WAX & VASELINE PLANT

Q_iso Technology Co., Ltd.Seoul, Korea

Q_isos Activities

OPTIMUM SOLUTION

PROJECT MANAGEMENT

TOTAL SOLUTION

OPERATION & MAINTENANCE SERVICE

INSTALLATION & CONSTRUCTION

PROCESS & MECHANICAL ENGINEERING

FRONT-END ENGINEERING

Since 2000, Q_iso Technology Co., Ltd. (Q_iso) has primarily involved in front-end engineering, process and mechanical design in the field of oil & gas, petrochemical and power industry. Based on these kinds of diversified experiences, Q_iso, as an Engineering, Procument & Construction contractor, offers down-stream plant of various scales for solvent, wax and asphalt through a close alliance with Dong Nam Petrochemical Co., Ltd. (Ulsan, Korea) having with accumulated operation know-how for more than 30 years.

Q_iso Technology Co., Ltd.

PETROLEUM WAX & VASELINE PLANT

Slack Wax

SWEATING & PURIFICATION

* Paraffine Wax * Microcrystalline Wax

ACID TREATMENT& PURIFICATION

* Petroleum Jelly (Vaseline)

PETROLEUM WAX & VASELINE Slack Wax, feedstock, is obtained from the dewaxing of refined or unrefined vacuum distillate fractions. If the material has been separated from residual oil fractions it is frequently called Petrolatum. The slack waxes are de-oiled by sweating processes to produce commercial waxes with low oil content. The oil that is separated from these processes is known as Foot Oil. The refined petroleum waxes are known as Paraffine Waxes. Microcrystalline Waxes have higher molecular weight than the paraffine waxes and consist of substantial amounts of iso and cycloalkanes. PARAFFINE WAX

A waxy crystalline substance that in the pure form is white, odorless and translucent and has the approximate chemical formula of C20 H42 (and above). It is obtained from petroleum by distillation and is then purified by sweating or solvent refining. Paraffin, which is not a true wax, consists mainly of a mixture of saturated straight-chain solid hydrocarbons. Its melting points range from 50C to 57C.

MICROCRYSTALLINE WAX

Microcrystalline waxes consist of odorless, tasteless, non-polar hydrocarbons with relatively high melting points. Multiwax grades vary in color from white to yellow, and in such physical properties as hardness and melting point.

VASELINE (PETROLEUM JELLY)

Vaseline is a well-known brand of petrolatum (Petroleum Jelly). Petrolatum is a flammable, semi-solid mixture of hydrocarbons, having a melting-point usually ranging from a little below to a few degrees above 37C. It is colorless or of a pale yellow color, translucent and devoid of taste and smell.


PROCESS FLOW DESCRIPTION - I

Paraffin Wax & Microstalline Wax;

The slack wax, as by-product, is obtained in the lube oilprocess of the refinery plant. Slack wax is a mixture ofoil and wax, which serves as the wax industry'sfeedstock and that is further refined and blended tocreate value-added petroleum wax products.

SWEATING PROCESS The sweating chamber, a steel structure covered with insulation, contains rectangular trays with cone shape bottom, which are equipped with approx. 50 mesh screen plate in its lower part and coils for alternate cooling and heating purpose. These trays are installed inside of the sweating chamber by an arrangement of several vertical lines of which each has approx. 8 ~10 trays. In the first step of this process, the fresh water is filled in each tray until the level reaches slightly over the screen mesh before the feed wax feeds to keep 10 ~ 20 cm thick beds and then the cooling water is circulated through the coil. After the feed is completely crystallized, the filled water is drained off. The crystallized wax is then sweated while simultaneously draining the liquid drippings, so called foot oil, from each tray in the sweating chamber. The later fractions of foot oil is recycled through sweating process. When the congealing point of the liquid drippings indicates that melting temperature of desired wax product has been obtained, sweating and drainage are stopped. Consequently, the remaining solid bed of wax in the sweating chamber is rapidly melted by heater and then flows to semi-finished product tanks. To produce refined wax from a product wax requires that the wax should be treated with activated clay for color and odor removal is filtered in filter press or rotary drum filter. In order to obtain the low oil content required in final wax products, sometimes two or three repeated treatments are required. Figure 1. Process Flow Diagram (Wax-Sweating Process)


PROCESS FLOW DESCRIPTION - II Vaseline (Petroleum Jelly);

In the process, either petrolatum and lube base oil from oilrefinery or paraffin and micro wax produced from the sweating process as described are used as feedstock. The process, as semi-continuous process, can be divided either by the blending ratios of the feedstock or treatment methods.

ACID TREATMENT PROCESS The feedstock from storage tanks are exactly pre-measured in proportion to each required fraction and then transferred by metering pumps to the acid treatment tank where they are blended and mixed to give certain desired properties such as melt point and penetration. After the transfer is completed, the blended is mixed and heated up to 80 5 C by hot water through heating coils equipped within the tank. In case the blended meets the targeted qualities by sampling check, it proceeds to the next stage acid treatment. The sulfuric acid (H2SO4) solution with concentration of approx. 0.5 wt % is gradually injected into the tank with maintaining the pre-conditioned temperature and blending. In the reaction with sulfuric acid, most of traces of aromatics, resins and impurities are removed. As a form of finishing process, the treatment of the molten wax with activated earth (Clay) to neutralize acidity remaining from earlier sulphuric acid treatment and/or to improve color and reduce odor and taste of the finished wax, also to remove traces of possibly harmful compounds (Polycyclic Aromatic Hydrocarbons). In the next filtration, the finishing product is filtered in filter press or rotary drum filter. This earth treatment may be repeated several times until the product meets the requirement of color and neutralization Figure 2. Process Flow Diagram (Vaseline-Acid Treatment Process)


FEEDSTOCK PROPERTIES

Slack Wax; Generic term for the mixture of wax and oil recoveredin a dewaxing process; may contain 2 ~ 35% oil. Typical dispositions are to further process for finishedwax, to process for fuels or to sell into certain end-usemarkets.

Table 1. - Physical Properties of Slack Wax

NO. CHARACTERISITICS SPECIFICATIONS

1 Kinematic Viscosity @ 100C 7 ~ 9

2 Congeal Point, C 65 ~ 68

3 Density @ 15 C 0.83 ~ 0.85

4 Oil Content, wt % Max. 30

5 Refractive Index @ 70C 1.452

6 Color Yellow

7 Flash Point, C 248 ~ 262

8 Asphaltness, wt % 0.02 ~ 0.05

9 Water Content, Vol % trace

10 Pour Point, C 58 ~ 63

11 Sulfur Content, wt % 0.29

* The above is a typical specification of the feedstock, which have been used as main raw materials.

Picture 1. View of Wax and Vaseline Plant


END PRODUCTS


Table 2. - Specification of Microcrystalline Wax Table 3. - Specification of Refined Paraffin Wax

Table 4. - Specification of Petroleum Jelly(white)

APPLICATIONS

NO. CHARACTERISITICS SPECIFICATIONS1 Color, Saybolt 29 2 Melting Range, C 58 ~ 60

3 Needle Penetration, 1/10 mm

FURTHER INFORMATION Phone: + 82 2 2025 7826, Fax: + 82 2 2025 7828 e-mail: qiso00 @ qiso.co.kr Q_iso Technology Co., Ltd. No. 806, Ace Techno Tower , Guro3-Dong, Guro-Gu, Seoul, Korea 152-780 URL: www.qiso.co.kr


PETROLEUM WAX & VASELINE PLANTPETROLEUM WAX & VASELINEVaseline (Petroleum Jelly); Tires Industry

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Petroleum Wax & Vaseline Plant