PPC Plant

PPC Plant

PPC Plant

Agent Technology and Plants

Technology Introduction:

PPC (polypropylene carbonate) is a completely biodegradable environment-friendly plastic synthesized from carbon dioxide and propylene oxide. Besides, due to its using the main source of greenhouse gases---CO2 as the feedstock, PPC not only reduces the emission of greenhouse gases, but also reduces the consumption of fossil fuel. Compared to the degradable PLA(polylactide), it has advantages of high strength, good ductility, lower production cost and etc. PPC polyol with low molecular weight are used to replace conventional petroleum-based polyether, polyester and polycarbonate polyols, while PPC with high molecular weight are employed as film products, oxygen barrier material, injection molding material and etc., especially in package industry and agriculture.

SL TEC offers high molecular weight PPC production technology, with the development history as below:

In 1998, the research of CO2 based plastic began;

In 2001, the first over 1,000TPA PPC pilot line was built and successfully accepted;

In 2012, 30,000TPA PPC production line was built and successfully put into production;

In 2013, the technology was upgraded to increase the molecular weight to 300,000;

In 2016, a 30,000TPA PPC plant using new technology is under construction

Technical Features:

1. The number-average molecular weight of PPC using our technology reaches about 100,000, achieving the most advanced level in the world.

2. The tertiary catalyst ensures shorter polymerization time, i.e., 8 hrs, and within 8 hours the catalyst activity can reach a very high level.

3. For the production of per ton of PPC product, about 0.45-0.5 mt of carbon dioxide will be consumed. It not only makes use of the CO2, but also the PPC product is completely biodegradable and thereby reduces “white pollution”.

Performance:

1. Product Specification

S/N	Item	Index
1	Appearance	White or colorless transparent granule
2	Density	1.24~1.27g/cm3
3	Number-Average Molecular Weight	200～300kg/mol
4	Glass Temperature	35～39
5	CO2 content by weight	40～42%（wt）
6	5% decomposition temperature	undefined230℃
7	processing temperature	140～190℃
8	Moisture Content	undefined0.3%（wt）
9	Ash	undefined1000ppm
10	Biogradability	Under forced composting, will be decomposed within 3 months

2. Product Mechanical Properties and Transparency

Density  (g/cm3)	Melting Index  (g/10min)	Tg  (0C)	Tensile  Strength  (MPa)	Tensile Modulus  (MPa)	Elongation at break  (%)	Impact Strength  (g)	Transmittance
1.25-1.30	0.2-10	35-38	40-45	1000	15~20	undefined35	94-95%
20oC	160 oC,     2.16Kg	DSC 100C/min	20oC,  50mm/ min	20oC,  50mm/min	20oC,  50mm/min	20oC,falling dart impact	0.2mm film,  400-800nm

3. Specific Consumption

S/N	Item	Specification	Consumption Rate
1	Catalyst, kg/mt of PPC	99.95%	20
2	Propylene Oxide (PO), mt/mt of PPC	Superior Grade	0.6
3	Carbon Dioxide, mt/mt of PPC	Food Grade	0.48
4	Acid, kg/mt of PPC	Superior Grade	27
5	Dichloromethane, kg/mt of PPC	First Grade	1.6
6	Calcium Hydroxide, kg/mt of PPC	Industry Grade	8
7	Circulating Water, mt/mt of PPC	Delta temp. 8oC	240
8	Chilling Water, mt/mt of PPC	Delta temp. 5oC	80
9	Demineralized Water, mt/mt of PPC		0.8
10	Electricity, KWH/mt of PPC	380V	3,200
11	Steam, mt/mt of PPC	1.0MPaG	0.8
12	Instrumental Air, Nm3/mt of PPC	0.7MPaG	16
13	Nitrogen, Nm3/mt of PPC	0.7MPaG	1.6