Quantity: 700,000 per year, 5 years contract 

CIF China port Payment : By irrevocable L/C at sight for 100% of invoice value, for each 140,000 CUBIC Shipped per month’s shipment total value.

Performance Bond: 2% of the face value of the L/C

Spec: See below 

C4 Purchase Requirement for China’s Domestic Chemical Industrial Companies

No.	NAME	名称	CONTENT 组分	REMARK 备注
1	C2+C3	碳二+碳三	＜1%
2	C5	碳五	＜0.3%
3	Isobutane	异丁烷	＞35%	Flexible 可调整
4	Butylene, Cis-Butene, Trans Butene	正丁烯，顺丁烯，反丁烯	＞50%	Flexible, but at least 42% 可调整，但至少42%
5	Isobutene	异丁烯	＜5%
6	Butadiene	丁二烯	＜0.2%
7	Arsenic	砷含量	＜150ppb	Severe 必须
8	Sulfur	硫含量	＜50ppm
9	Chlorine	氯含量	＜2.5ppm	Severe 必须
10	Water	水	＜500ppm
11	Methanol	甲醇	＜4000ppm
12	DME	二甲醚	＜4000ppm
13	MTBE	甲基叔丁基醚	＜100ppm

       What is C4?

Liquefied Petroleum Gas or LPG is a commonly marketed petroleum product and usually comprises of C3 and C4 hydrocarbons – propane, propylene, n-butane, isobutane, butylene etc. LPG is a mixture of hydrocarbons occurring between lighter components occurring in the utility fuel gas (C1 and C2) and heavier liquids occurring in naphtha and gasoline (c5 and onwards). The distillation range for LPG hydrocarbons at atmospheric pressure occurs between -490F to 340F. Some properties of commercial quality propane and butane (not pure propane and butane but mixtures of c3/c4 components) are presented in the following table and a combination of these may be approximately used as properties of LPG.

Properties	Propane	Butane
Specific gravity of liquid at 600F/600F	0.509	0.582
Initial Boiling point at atmospheric pressure	-510F	150F
Initial dew point at atmospheric pressure	-460F	0.5820F
Ignition temperature in air	9200F-10200F	9000F-10000F
Maximum flame temperature	32950F	36150F
Max / Min limits of flammability (wt% of gas in air)	2.4 / 9.6	1.9 / 8.6
wt% of gas in air for maximum flame temperature	4.4	3.3

The C3/C4 hydrocarbons in crude oil are separated at the atmospheric distillation column. They are further sent to merox unit for removal of hydrogen sulfide gas. Light C3/C4 hydrocarbons are also available from cracking operations for hydrocarbons. The unsaturated C3/C4 hydrocarbons separated from cracking are also sent to LPG product. Please Note:   We will not respond if we do not know who we are dealing with, so please email your information with your full details to info@tigertradinggroup.org and we will respond with a Letter of Intent.  Thank you.