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碳四(C4)采购项目概述

日期:2014.02.27  来源:阿拉伯信息交流中心

Brief Description of C4 Procurement

一、            碳四(C4)概述

One: brief description of C4

(A)    碳四(C4):本品存在于油田气、湿天然气和裂化气中,如石油化工轻油裂解制乙烯装置中,联产的碳四烃,约为乙烯产量的40%;石油炼厂催化裂化装置所产的碳四烃,约占装置处理量的6%,经分离可得碳四。

C4: this product exists in oil field gas, natural gas and cracked gas. In petrol chemical industrial equipment, it exists in the ethylene equipment for light oil splitting decomposition. Cogenerated C4 hydrocarbon, consists about 40% of ethylene production; in the splitting decomposition equipment of petrol chemical industry, C4 Hydrocarbon consists about 6% of the total production outcomes, C4 can be obtained after detach process.

(B)    醚后碳四(etherified C4):C4中的异丁烯与甲醇发生醚化反应生成MTBE(甲基叔丁基醚)。醚化反应后的混合C4被称为醚后C4,其主要组分为异丁烷、正丁烷、正丁烯、顺-2-丁烯、反-2-丁烯及少量丁二烯。醚后碳四就是醚化反应掉异丁烯剩余的碳四,主要是丁烯-1、丁烷、顺反丁烯-2等,和抽余碳四比就是少了异丁烯。

etherified C4: after etherification reaction of isobutene in C4 and carbinol, MTBE can be obtained. The C4 after etherification reaction is called etherified C4, the main Ingredient of etherified C4 is iso-butane, n-butane, n-butene, cis-2-methylbutenoic acid, trans-2-Butenyl acetate, and a little bit butadiene. Etherified C4 is the C4 with isobutene wiped out after etherification reaction; compare to the raffinated C4, etherified C4 mainly contains butene-1, butane, cis-2-methylbutenoic acid, trans-2-Butenyl acetate and with isobutene wiped out.

二、            运输及到岸港口

Two: Transportation and Delivery Port

采用专业C4运输船舶运输,到岸中国山东青岛港石化码头、中国山东东营港石化码头、中国江苏南通港石化码头

Transportation of C4 must be carried out by specified vessels in order to keep security and cargo characteristics, discharging port is Petrol Chemical Terminal of Qingdao Port, Shandong Province, China; Or Dongying Petrol Chemical Terminal in Shandong Province, China; or Nantong Petrol Chemical Terminal in Jiangsu Province, China.

三、            价格、结算方式

Three: Price and Payment Terms

可执行FOBCIFCFR,结算方式国际信用证结算。

FOB, CFR or CIF terms are acceptable; payment is settled by Letter of Credit with International standard.

四、            检验

Four: Inspection

双方可约定聘请第三方国际检验机构,对商品在起运港码头验货,并依据其检验结果及其开具的检验证书作为信用证结算依据 。

Both seller and buyer agree to employ a third International inspection organization to inspect the goods in loading port, a certificate will be issued by the inspection organization according to the inspection results. This certificate will become one of the proofs for payment settlement.

五、            采购量及采购期限

Five: Quantity and Procurement Terms

每月采购量不小于2万吨,采购期为12个月。

Monthly buying quantity not less than 20000 tons, procurement term is 12 months.

六、            采购标准详见下列附表(1.2.3

Six: Procurement Standards, please refer to below Technical Tables (1, 2 and 3)

(表1)“醚后碳四”采购标准

Table One: procurement standard of Etherified C4

序号

Item No.

组分

Ingredient

指标

Norm

单位

measurement

备注

remarks

1

顺丁烯  maleic

>45

wt%

反丁烯  Trans-butene

1-丁烯 1 – butylenes

2

异丁烯  isobutene

<7

wt%

3

二甲醚  DME

<100

ppm

<0.01%

4

MTBE

<70

ppm

<0.007%

5

丁二烯  butadiene

<2000

ppm

<0.2%

6

总硫  total sulfur

<20

ppm

<0.002%

7

碳五及碳五以上组分 C5 and above constituent

<0.5

wt%

8

碳三及碳三以下 C3 and below constituent

<3

wt%

9

甲醇 carbinol

<1

wt%








>





















 (表2):碳四(C4)采购标准

Table Two: procurement standard of C4

组分 ingredient

含量 content

甲烷 methane

0.01

乙烷 ethane

0.15

丙烷 propane

17.69

丙烯 propylene

0.43

乙炔 acetylene

0.01

异丁烷 iso-butane

29.12

正丁烷 n-butane

10.82

反丁烯 Trans-Butene

14.89

正丁烯 n-butene

13.65

异丁烯 isobutene

2.67

顺丁烯 maleic

10.33

异戊烷 isopentane

0.03

丁二烯 butadiene

0.18

其他 others

0.02

二甲醚 dimethyl ether

0.07

甲醇 carbinol

0.1




























>








(表3)碳四(C4)采购标准

Table Three: procurement standard of C4

组分 ingredient

含量 content

甲烷 methane

0.006

乙烷 ethane

0.009

乙烯 ethylene

0.005

丙烷 propane

2.312

丙烯propylene

0.185

异丁烷 iso-butane

31.456

正丁烷 n-butane

17.503

反-2-丁烯 trans-2-Butenyl acetate

11.93

正丁烯(1-丁烯)n-butene

11.107

异丁烯 isobutene

12.154

顺-2-丁烯 cis-2-methylbutenoic acid

8.609

异戊烷 isopentane

3.585

C5+

1.29

总硫 total sulfur

551mg/m³

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