1, DMSO application in petroleum processing
its advantages are:
(1) high pre-selectivity of aromatic diameter,
(2) unlimited mixing of aromatic diameter at room temperature,
(3) low extraction temperature, and not with alkanes, olefins, water Reactions
(4) non-corrosive, non-toxic,
(5) simple extraction process, less equipment, energy saving,
(6) insoluble olefins suitable for oils containing high ene,
(7) solution recovery can be used for reverse extraction. It is superior to Shell's Sulfinol method and Universal's Udcx method. China's Beijing, Liaoyang Petrochemical Company in the introduction of equipment has been used.
DMSO is soluble to acetylene, and 33 liters of DMSO per liter can dissolve acetylene, while acetone can only dissolve 25 liters of acetylene DMSO with high boiling point, recovery and regeneration is easy. Trapped for petroleum gas acetylene recovery and dissolved acetylene production.
Beijing Institute of Pharmaceutical Research with soluble sarcoma, B518, C6323, N A and other drug research institutes with soluble sarcoma, tumor local, achieved good results, significantly inhibit tumor growth. In animal experiments, the concentration of local drugs was 2 to 8 times higher than that of other drugs after anatomy. Foreign studies believe that cancer cells have a layer of protective film, hindering the entry of drugs, DMSO has diagonal dissolved penetration ability, so it can improve the efficacy.
60's Beijing Concord Hospital and other 160 medical units for clinical trial, and opened a special clinic in Benxi, accumulated a large amount of data, practice has proved to be neurodermatitis, psoriasis, arthritis, cystitis, follicleitis, rheumatoid, otitis, rhinitis, attachmentitis, toothache, band rash, sores, sprains, lumbar muscle strain, burns, trauma and so on. At present, the production of bone friend spirit, foot gas medicine, skin hydrogen pine ointment and other external drugs and major hospitals in the external preparations have been widely used. The Institute of Veterinary Medicine of the Chinese Academy of Sciences used DMSO to dissolve "Paz" to treat horse disease and parasitic diseases. Especially in Chinese medicine extraction preparation, the content of useful parts is improved and the ability of medicine is improved.
10, application in synthetic resins
IN production DMSO as a polymer reaction solvent for polysacrylic resins. DMSO is soluble for many natural resins and synthetic resins, and can dissolve nylon, polyester and polychloride resins over medium heat. DMSO is used in artificial leather processing and can also be used as a polyurethane reactor cleaner and acrylic co-reactant solvent.
11, application in coking by-products
in the production of tantalum, for tantalum refining. In the oil to add DMSO extraction essence, a extraction content of up to 98% or more, without water back extraction recovery DMSO, the process is simple. It is also used outside China for the recovery of organic sulphides in coke oven gas separation.
12, application in the wet smelting of rare metals
foreign reports of the extraction of gold, platinum, palladium, palladium, palladium and radioactive elements with DMSO, and antifreeze for selective, soluble and cryogenic crystalline analysis.
13, used in the electronics industry
DMSO for Farah-class, ultra-large capacity capacitors - liquid double-layer capacitors electrolytes, the current capacitors are only micro-capacity Farah, and this capacitor can reach 1 to 100 Farah. Such as: Japan 3 to 5V10F, the United States 1.6V 100F capacitor, used in solar power supply systems as energy storage elements, electronic computers and robots information protection power and memory components. In electronic components, integrated line cleaning in a large number of use of DMSO, it has organic matter, inorganics, polymers, the function of one-time removal, and non-toxic, tasteless, easy to recycle.
14, application in organic synthesis
DMSO in chemical reactions play a dual role in reaction solvents, reaction tests, some erractive reactions can be carried out smoothly in DMSO, some chemical reactions have accelerated, catalytic effect, improve yield, reform product performance.
(1) Pro-nuclear replacement reaction: DMSO is a halogenatedane and sulfonate pro-nuclear dissoluing solvent, can produce additions, the reaction rate is 155 times faster than the general non-proton solvent, in the alkylation reaction occupies an important position.
halogen and inorder cyanide reaction preparation, not easy to react. In DMSO, the reaction speed is fast and the yield is high. Sodium nitrite has a similar effect when it is converted to nitros with halogen or a-halogen.
Swarts reaction is not easy to prepare aromatic fluoride, but in DMSO, potassium fluoride and chloride aromatic hydrocarbons and other volatile reactions yield a high yield of fluorine exchange. Brominated benzene and butanol potassium produce phenylschodyl ether without heat in DMSO.
(2) elimination reaction: pyridine and adipose are thinned in DMSO, and sulfonates and halides are produced in DMSO " to produce ene. Cope elimination reactions run smoothly at room temperature in DMSO and are 105 times faster than in water.
(3) hydroelectrelectration subsurmission reaction: in DMSO some saturated carbon atoms hydroelectrelation subsurmission reaction can be carried out quickly. For example: oleol sodium salt in benzene with halogen alkylation, the addition of 0.65mol/ L concentration of DMSO, can make the reaction, in DMSO than in the dioxyhexy ring 20 times faster. The rate of hydrogen-heavy hydrogen exchange in organic matter under alkali catalysis was 109 times higher in DMSO than in alcohol. In DMSO, the asymmetric a-carbon decarbonization rate is 106 times higher than in statins.
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