FGC-1930 Methyl tert-butyl ether (MTBE) determination of the special gas chromatograph

scope
Methyl tert-butyl ether, the abbreviation of MTBE (methyl tert-butyl ether), is a colorless, transparent, low viscosity volatile liquid with special smell, the oxygen content of 18.2% organic ethers. Its vapor is heavier than air, it can spread along the ground, when coexist with strong oxidants can burn. The MTBE purity of about 99.5% and 97%, of the formula: CH3OC (CH3).
MTBE is a high-octane gasoline components, based on octane RON: 118, MON: 100, is an excellent high-octane gasoline additives and antiknock. MTBE and gasoline can occur without any proportion miscible stratification, with the gasoline components to reconcile, to reconcile a good effect, higher than its net reconcile octane octane. MTBE is relatively high oxygen content, can significantly improve vehicle emissions. But if MTBE is added in a proportion not controlled, so that the theoretical air-fuel ratio exceeds the equivalent adjustment range of the closed-loop control of the engine electronic control unit adaptive can chew, because it will interfere with the oxygen-rich and closed-loop control, catalytic converters make conversion efficiency decline. The study also found that MTBE can contaminate underground water sources, the United States, California and other places has been prepared disabled MTBE. Studies in Japan, a research firm also indicated that the content of MTBE in gasoline more than 7%, vehicle emissions of nitrogen oxides will increase. Therefore, Japan's premium unleaded gasoline, MTBE is added in an amount of not more than 7%.
MTBE generally based on methanol and isobutene as raw material, with an acidic catalyst synthesis, wherein the catalyst used in industry is the most resin catalyst. Wherein due to the different sources of isobutylene and the formation of different synthetic routes.
Source isobutylene
Ethylene cracker byproduct C4 fraction
FCCU refinery byproduct C4 fraction
In n-butane isomerization and as raw materials by dehydrogenation
MTBE synthesis catalyst:
Hydrofluoric acid
sulfuric acid
Styrene cation exchange resin
Solid acid
Zeolite
Reaction equation
The MTBE reaction is an addition reaction selectivity, olefins tertiary carbon atom forming carbonium ions in the presence of an acid catalyst, and then with an alcohol to form an ether. Exothermic reaction is a reversible reaction.

Features
1, The instrument uses Internet communication technologies can be easily composed LAN; Internet for long-distance data transmission, remote control, remote diagnostics, the program can be automatically upgraded.
2, all computerized key operation, 5.7-inch large-screen 13-line LCD display English, man-machine dialogue, easy to operate.
3, a new integrated digital electronic circuits, high control precision, stable and reliable performance, temperature control accuracy of up to 0.1.
4, the unique design solution inlet injector discrimination;-post compensation not only solve the baseline drift caused by temperature programming, and subtracting the background noise, you can get a lower minimum detection limits.
Large oven volume: 300 * 280 * 180 can accommodate two 80m capillary column.
5, better insulation: oven, vaporization, when the test were 300 degrees, the hottest spot outside the box and cover only 40 degrees, improve test speed, security of human safety.
6, the unique design of the vaporization chamber, smaller dead; replacement parts: septum, liner, extreme polarization, and the collector nozzle can replace with one hand; body replacement: packed column, capillary injector, TCD , FID detector requires only a wrench can be completely disassembled, maintenance is very convenient.
7, intelligent opened the door and out of the system infinitely variable air volume, reducing the program up / cool down after the system is stable equilibrium time.
8, which can install two injection systems: packed column capillary split / splitless injection system (having a membrane cleaning function); can also install two identical or different detectors: a FID, TCD, ECD, FPD detection device. Optional automatic / manual six-way gas sampling valve injector, headspace sampler, thermal desorption injector, the injector cracking furnace, methane reformer.
9, start with a powerful and comprehensive self-diagnostic function, visual display fault information, power storage protection, keyboard lock and power supply with anti-interference function mutation.

Technical Parameters
1, temperature range: room temperature ~ 450 ℃, Increment 1 ℃, Accuracy ± 0.1 ℃
2, temperature program: heating rate of 16 bands 0.1 ~ 80 ℃ / min
3, communication interfaces: Ethernet, IEEE802.3
4, the host size: 510 * 500 * 540 (mm)