Methylcyclopentadiene manganese tricarbonyl (MMT) /12108-13-3

Methylcyclopentadiene manganese tricarbonyl (MMT) 12108-13-3 is widely used as petroleum additive.
Methylcyclopentadiene manganese tricarbonyl (MMT) 12108-13-3

1, physical and chemical indicators
Methyl cyclopentadienyl manganese tricarbonyl (referred to as MMT), by product composition, use and application of the environment is divided into SD-98 type and two SD-62 type. The physical and chemical indicators of MMT in the table below -1.
Table -1 Physical and chemical indicators of MMT products
Item
SD-98 type
SD-62 type
Color
Orange oily liquid
Orange oily liquid
Density (20 °C), g / ml
1.35-1.38
1.10-1.12
Manganese content (weight%)
≥ 24.4
≥ 15.1
Flash Point, °C
≥ 80
≥ 40
Solidifying point, °C
≤ -1
≤ -22
Solubility
With gasoline, toluene immiscible, insoluble in water
With gasoline, toluene immiscible, insoluble in water
Moisture, mg / kg
≤ 200
≤ 200
Methyl cyclopentadienyl manganese tricarbonyl quality base percentage%
≥ 98%
≥ 62%
2, the mechanism
MMT decomposition in the combustion conditions for the activity of manganese oxide particles, because of the role of the surface, damage to automobile engines have been generated by peroxide, resulting in pre-flame reactions reduce the concentration of peroxide, at the same time part of a selective disruption of the chain reaction in order to impede the automatic fire, slowing the rate of energy release, so that increased antiknock fuel.
Hydrocarbons in gasoline of the sensitivity of MMT:
·Alkanes> alkenes> aromatics
·Low octane number fuel oil> high-octane fuel
· Research> motor
·Antiknock efficiency is twice as tetraethyl lead
· In gasoline by adding 18mg / L dose of the octane number of MMT in gasoline to improve the effectiveness of transfer and MTBE8% -10% of the octane number of the effect of a considerable improvement.
3, the performance characteristics
(1) increase the gasoline octane number
In one ten thousandth of gasoline by adding MMT, the manganese content of not more than 18mg / L, can increase gasoline octane number of 2 to 3 units.
(2) increase in vehicle power and reduce fuel consumption
By the Ministry of Transportation motor transport industry and energy use monitoring center showed that the engine test aircraft: MMT additions of 90 # unleaded gasoline with non-MMT # 90 compared to unleaded petrol, the engine power and performance to lower fuel consumption.
(3) with oxygen, such as MTBE and ethanol were good with the group of
MMT and MTBE, the octane number of ethanol to improve with better adduct, which provided for the production of high-grade gasoline convenience.Can meet the higher octane number, and avoid the use of MTBE due to excessive performance degradation caused by excessive automobile power, and can meet the "oxygen content not more than 2.7 percent" of the national standards.
(4) to reduce pollutants in automobile exhaust emissions
MMT additions of 90 # unleaded petrol and non-PPD 90 # unleaded gasoline in the exhaust gas compared to CO decreased 17.7%, HC decreased 18.2%.
4, application
MMT gasoline gas oil catalytic cracking susceptibility testing
MMT
(mgMn/L)
RON
RON
MON
MON
Test to
0
88.5

77.7

State petroleum products
Quality Supervision and Testing Center
18
91.1
+2.6
79.7
+2.0
0
90.5



PetroChina Changqing Petrochemical Company
15
92.9
+2.4


0
91.3

79.5

Yumen oil refinery
16
93.6
+2.3
81.1
+1.6

Reminder Steam Direct Steam 90% + 10% MMT susceptibility testing
MMT
(mg Mn / L)
RON
RON
Test to
0
89.9

Yumen oil refinery
18
92.3
+2.7
0
87.5

PetroChina Changqing Petrochemical Company
15
90.2
+2.7
0
89.2

Branch of the oil refinery in Ningxia
18
91.6
+2.4