nmr
nmr
(OP)
What processes are using NMR for process control? Am interested in learning more about NMR successes.
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RE: nmr
tkyeo
RE: nmr
RE: nmr
Very limited as regards to continuous processes. Most NMR systems are batch tests best suited for the lab.
RE: nmr
RE: nmr
the on-line application of the measurement is a new one to me.
a variation of nmr is used in down-hole oil exploration.
the usual focus of lab-nmr is on the molecular environment of the hydrogen atoms in the material.
RE: nmr
Thanks.
RE: nmr
C.
RE: nmr
it was a determination of the ratio of two types of edible oils. the degree of hydrog. was the only way to quantify it, other than a series of testing by individuals.
Was un-aware of nmr usage in octane analyzers.
RE: nmr
Thanks for the information. Can you answer if this is applicable to broadline (less than <40MHz)NMR or is chemical shift analysis required?
I have found several laboratory applications, but very little on-line.
RE: nmr
RE: nmr
Low field NMR is also used in a number of other industries:
- Food - moisture, fat and oil content, droplet size, composition of dairy, oils, starches, rice, fruits, vegetables, etc.
- Agriculture - moisture and oil content, composition of soil, seeds and feeds.
- Petroleum - oil content, octane numbers, free/bound components, viscosity, porosity, pore size in coals, waxes and rocks, crude oil blending.
- Chemicals - free/bound moisture, viscosity, activity, loading efficiency in powders, catalysts, liquids, detergents, and pigments.
- Cosmetics - moisture and oils in powders and pigments.
- Pharmaceuticals - (moisture / oil contents, coatings, composition in capsules and tablets.
- Polymers - density, crystallinity, rubber content, dispersion of fillers, copolymer content, solubles, melt properties, extent of cure, moisture and plasticizer content, polymer mixing, crosslinking, finish content, tensile strength, etc.
There are a number of companies which offer this service to get you started
- Progression, Inc (formerly Oxford)
- Process NMR Associates (great web site with details)
- Bruker MiniSpec
- Process Control Technology
- Resonance Instruments
- Foxboro
Most systems are low field NMRs 10-30 MHz though processes that examine mobile liquids can use higher magnetic fields to improve results (50-100 MHz). Most low field NMRs are lab units to my knowledge with only some petroleum and polymer applications actually using on-line systems to control the process directly.
Hope this helps.
RE: nmr
- measure composition of reformer product (reformate) to fine tune reformer serverity and light/heavy reformate split.
-measure aromaticity of gasoil feed to FCC to tie into DMC controller or just to monitor process health.
Cheers
RE: nmr
John
RE: nmr
What is the application in coal slurry? What do you determine via NMR?
RE: nmr
John
RE: nmr
NMR also is now used for BTU measurements in coal
RE: nmr
John