Ví dụ về việc sử dụng Hydrogenation trong Tiếng anh và bản dịch của chúng sang Tiếng việt
{-}
-
Colloquial
-
Ecclesiastic
-
Computer
Method: Hydrogenation and De-hydrogenation(DHD).
Maltitol is a disaccharide produced by hydrogenation of maltose obtained from starch.
Hydrogenation involves the reaction of oils with hydrogen.
The raw material is titanium sponge,and the processing method is Hydrogenation and De-hydrogenation(HDH).
Hydrogenation and other high-pressure reactions(up to 80 bar).
Trans fats are created in a process called hydrogenation, where liquid oils are infused with air to make a solid oil.
Pyridine hydrogenation with ruthenium-, cobalt-, or nickel-based catalyst at high temperatures results in the production of piperidine.
This compound may serve as a chemical reagent in itself,by acting as a dihydrogen donor in transfer hydrogenation.
Catalytic hydrogenation then removes the carbobenzyloxy protecting group to afford the secondary amine(8).
Mainly used in alloys(such as nickel steel and nickel silver) and as catalysts(such as Laney nickel,especially as hydrogenation catalysts).
Hydrogenation increases the saturated fat content of the oil, but unhealthy trans fats are formed as a byproduct(1).
Racemic menthol can be prepared simply by hydrogenation of thymol, and menthol is also formed by hydrogenation of pulegone.
Hydrogenation can occur when oils are heated to very high temperatures, or if food manufacturers add hydrogen to their products to extend their shelf life.
Dihydrocinnamyl alcohol, which occurs naturally but is produced by double hydrogenation of cinnamaldehyde, is used to confer the fragrances of hyacinth and lilac.
The synthesis uses such reactions as the Mannich reaction, Pictet-Spengler reaction, the Curtius rearrangement,and chiral rhodium-based diphosphine-catalyzed enantioselective hydrogenation.
Trifluoroethanol is produced industrially by hydrogenation or the hydride reduction of derivatives of trifluoroacetic acid, such as the esters or acid chloride.[1].
When it is finely divided, such as in palladium on carbon,palladium forms a good catalyst and is used to speed up hydrogenation and dehydrogenation reactions, as well as in petroleum cracking.
Other methods, not noticeably in use, include hydrogenation of oxalic acid, and hydrolysis of the cyanohydrin derived from formaldehyde.[1] Some of today's glycolic acids are formic acid-free.
Carbohydrate fractions in biomasssuch as cellulose undergoes sequential hydrolysis and hydrogenation in the presence of metal catalysts to produce sorbitol.
Protonation is different from hydrogenation in that during protonation a change in charge of the protonated species occurs, while the charge is unaffected during hydrogenation.
Chemically, the unsaturated fatty acids areconverted during the phase transfer catalyzed reaction of hydrogenation into their corresponding saturated fatty acids by adding hydrogen atoms at the doublebonds.
The production process of amino alcohol is in the presence of catalyst, primary, secondary nitro alkanes and aldehydes, ketones showed the aldol reaction of typical get nitro alcohol,and then through the amino alcohol products from catalytic hydrogenation of the corresponding.
Trans fats areoften added to foods through a process called hydrogenation, which is used to increase the flavor and texture while extending the shelf-life of foods like vegetable oils.
Packer Rubber Barrel 1 High temperature high pressure expand packer It is applicable to sub level exploitation of oil gas fieldDifferent materials including fluorine rubber hydrogenation NBR NBR and ect are chosen to meet various temperature….
The acetaldehyde condensation method with acetaldehyde condensation into butanol aldehyde, crotonaldehyde dehydration, hydrogenation n-butyl aldehyde, then put the two molecules of n-butyl aldehyde condensation dehydration to 2- ethyl 2-- hexene aldehyde, hydrogenation was again 2- ethyl hexanol(1-).
This was traced to a report on the danger of hydrogenated vegetable fat in heart disease, but was later dismissed as being due only to the saturated fat content in these oils and fats,while the real reason was the formation of trans fats during hydrogenation.
Food manufacturers often hydrogenate fats using high pressure and hydrogen gas to increase their shelf life andstability, but hydrogenation also occurs when oils are heated to very high temperatures during cooking.
Food manufacturers often hydrogenate fats using high pressure and hydrogen gas to increase their shelf life andstability, but hydrogenation also occurs when oils are heated to very high temperatures during cooking.