Introduction
JNC Corporation, formerly known as “ChissoCorporation”, (“JNC”) started its commercial
production of polyvinyl chloride (“PVC”) in
Minamata, Japan in 1941 and it is the first PVC
producer in Japan. In 1950’s, JNC expanded
Minamata plant and also constructed Takefu
plant which was a joint venture company withShinetsu. Furthermore, JNC built its second
PVC plant in Goi in 1964 and its third PVC plantin Mizushima in 1970. While JNC was producing
PVC products in its own plants, JNC started
licensing PVC process technology and vinylchloride monomer (“VCM”) removal process
technology from the end of 1970’s. JNC haslicensed the suspension PVC process
technology to 34 companies and total annual
capacity of licensed plants has reached 13.5
million metric tons. In the meantime, we arealso licensing a unique VCM removal processfrom aqueous PVC slurry to world-wide
companies more than 163 units. JNC PVC
process technology can produce various gradesof PVC products with K-values ranging from 51
to 97 for homopolymers and copolymers withvinylacetate as well as special grades of PVC
products having excellent properties. JNC wasa pioneer in Japanese PVC industry and has
over 60 years’ experience in the fields of PVC
production, compound and processing.

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Advantages of JNC PVC Process
High Quality PVC Products
Requirement level of PVC quality by PVC
customers (PVC processors) in Japan has
been the highest in the world. To meetsuch strictest requirements, JNC, as thefirst PVC producer in Japan, had been
making the best efforts to repeatedly
improve the PVC quality for a long time. Asa result, JNC PVC quality, such as bettertransparency, high heat stability, excellent
weatherability,
superior
electricalproperties, surpassing processability andexcellent gelation, is on the highest level inthe world.
High Safety and Environmental
friendlyJNC PVC process plant is designed andoperated with high safety and without any
pollution, based on our long and richexperience. A basically closed system isused throughout the entire process plant.
JNC PVC process can be easily operated
without any trouble by adopting concepts
of “Simple”, “Maintenance Free” and“Safety and environmental friendly” basedon more than 60 years’ experience of PVC
plant operation.
Many Licensable PVC Grades
Using JNC PVC process, PVC producers
can manufacture many types of PVC
grades, including commodity types andspecial types, such as high K-value, low Kvalue, matted and copolymer, etc. All ofthese PVC grades have excellent quality,
and can be licensed upon customers’
requests.
Low Production Cost
By exhaustive recovery of VCM andenergy savings, JNC PVC processminimizes the consumption of raw
materials and utilities. With the adoption ofa highly automated DCS control system,JNC PVC process can be operated bysmall group of employees. This results inlow PVC production costs.
Low Investment CostJNC PVC process has been continuously
improved so that the higher productivity
can be accomplished in tandem withcompact
facilities
andantifoulingtechnology. PVC plant is comprised of
unique equipment skillfully and carefullyengineered by JNC Engineering Co., Ltd.,utilizing its expertise of the chemical
project engineering which has been
accumulated over 40 years. Therefore,
JNC process PVC plant can beconstructed at a relatively low investment
outlay.
Much License Experience and Good
After-Services
JNC has many licensees of PVC process
and VCM removal process in the world.
JNC continues to render technicalassistance services to our licensees evenafter start-up of the plant. What we want todemonstrate is that “No licensee has evercomplained about JNC PVC process.” In
addition, some licensees have obtained
JNC PVC process license repeatedly.

JNC PVC Process Description
Polymerization Section

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Purified VCM, pure water and otherchemicals, including an initiator are
charged into a reactor. The reactor
contents are vigorously stirred inside thereactor while keeping good suspension
conditions. At elevated temperatures,
VCM reacts to form the PVC particles in
the presence of the initiator. Finally, PVC
particles yields by the reaction form dense
slurry in the reactor. When the reaction
reaches its final stage, the un-reacted
VCM is recovered into a VCM gas holder,
and the polymer slurry is transported fromthe reactor to a slurry tank.
VCM Recovery Section

The un-reacted VCM gas in the gas holder
is compressed and condensed in therecovery section. The recovered liquid
VCM is stored in a vessel and is reused as
the feedstock for the succeeding
polymerizing reaction.
VCM Removal Section
The PVC slurry inthe slurry tank is
fed to strippingcolumn, where theun-reacted VCM iseffectively strippedout from the slurrywith steam andstripped slurry istransferred to thedrying section. The final VCM content in
PVC is less than one (1) ppm. The VCM

Removal system uses heat exchanger tominimize the steam consumption. The hotwater is used as washing for each stage
inside the stripping column. This
contributes to continuous operation for along term without stopping the feed. By aunique design of this column, it canachieve high efficiency, low steam
consumption without any quality problem.
Drying Section
The PVC slurry from the VCM Removal
section is fed into the centrifuge
continuously in order to separate wet PVC
cakes from water. The wet PVC cakes
discharged from the centrifuge are
dropped into a fluidized bed dryer, wheremoisture is removed from the PVC powder.
The dried PVC powder passes throughproduct sieves to eliminate any oversizedparticles, and is conveyed pneumaticallyto the product silos. The PVC product thus
obtained maintains uniform quality.

JNC PVC Grades
JNC has following grades which can belicensed upon customers’ requests:
TypeK-ValueBD

Application

Commodity

56 ~ 74

0.57 ~ 0.48

Rigid/Flexible

Low Molecular

51

0.51

Rigid

High Molecular

80 ~ 970.42 ~ 0.40

Flexible

Matted57 ~ 72

0.47 ~ 0.40

Rigid/Flexible

Copolymer

60 ~ 75

0.57 ~ 0.50

Rigid/Flexible

High Impact

670.55Rigid

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JNC Licensed Plants
PVC Process-- 52 licenses-- Licensed Companies: 34-- Licensed Countries: Taiwan, Indonesia,China, Thailand, India, Iran, Japan andPakistan-- Total Capacity of JNC Licensed Plants:
13.5 million t/y
VCM Removal Process-- A lot of licenses-- Licensed units: 163 in total-- Licensed Countries: Japan, Taiwan,Korea, Germany, Indonesia, France,
Belgium, Argentina, Spain, Greece, USA,Thailand, China, India, Iran and Pakistan=End=