37results about How to "Reduce the degree of coking" patented technology

A lubricating composition comprising: (i) from 50% to 99% by weight of base oil; (ii) from 0.01% to 5% by weight of ionic liquid; and (iii) from 0.01% to 10% by weight of additive; wherein the lubricating composition has a pour point of at most -54 DEG C, a flashpoint of at least 246 DEG C and a kinematic viscosity at 100 DEG C in the range of from 4.9 to 5.4 mm2 / s. The lubricating compositions according to the present invention are suitable for use in turbine engine oils and are useful for reducing the build up of sludge and for reducing coking in the lubricating composition.

The invention belongs to the technical field of polymer fiber production, and particularly relates to spinning oil for an anti-wicking industrial polyester filament and a preparation method of the spinning oil. According to the spinning oil for the anti-wicking industrial polyester filament provided by the invention, an anti-wicking agent is reasonably mixed with the spinning oil; and the mixed oil contains refined mineral oil and an antistatic agent, and simultaneously contains a water repellent agent in a fluorocarbon structure, so that the spinning oil provided by the invention has good heat resistance, bundling property and smoothness, and also has excellent hydrophobic property; the oil provided by the invention can reach the effects of low smoke amount, low coking degree and few broken filaments in the spinning process; and the prepared industrial polyester filament has excellent anti-wicking property.

The invention relates to a laying method of a refractory belt in a boiler furnace. The refractory belt is arranged on water screens of the four sides of the boiler furnace. The laid refractory belt is of rectangular and is divided into four small parts. The space among the four parts is cross-shaped. The horizontal space and the vertical space between every two of the four small parts are both 1meter. The upper rectangular refractory belt keeps a 1meter space with the lower rectangular refractory belt. All four small rectangles are 0.5-1meter long and wide. The big rectangular refractory belt is 6-7 meters long and 4.5-5.5meters wide. The laying method of the refractory belt in the boiler furnace can be put into operation during the boiler outage period. The practice of a company where the boiler works for continuous half a year after changing the laying method of the refractory belt proves that, compared with the state before changing the laying method of the refractory belt, the input amount of desuperheated water increases obviously, the main steam temperature is easy to be adjusted by hand and the overranging rate of the main steam temperature decreases obviously, the coking degree in the boiler furnace is obviously lessened, thus guaranteeing the safe and economical operation of the boiler and achieving the anticipated effects.

A lubricating composition comprising: (i) from 50% to 99% by weight of base oil; (ii) from 0.01% to 5% by weight of ionic liquid; and (iii) from 0.01% to 10% by weight of additive; wherein the lubricating composition has a pour point of at most −54° C., a flashpoint of at least 246° C. and a kinematic viscosity at 100° C. in the range of from 4.9 to 5.4 mm2 / s. The lubricating compositions according to the present invention are suitable for use in turbine engine oils and are useful for reducing the build up of sludge and for reducing coking in the lubricating composition.

The invention discloses an additive for improving the slagging characteristics of high-speed Zhundong coal and an application method thereof. The additive is composed of aluminum ash, dolomite and magnesium oxide, and the mass percentages are: aluminum ash 15%-65%, magnesium oxide 25%- 50%, the balance is dolomite. The application method of the additive in the present invention is to prepare mixed coal according to the mass ratio of the additive and the high-speed Zhundong coal (3-8): 100, and the mass percentage of each component in the high-speed Zhundong coal is: aluminum ash 1%-6% , magnesium oxide 1%-5%, dolomite 1%-5%. The implementation steps of the application method are: firstly determine the quality of each component of the additive according to the quality of the high-speed railway Zhundong, then crush and mix the additive and the high-speed railway Zhundong coal in a coal mill or flow and mix in a primary air duct, and finally send the additive. Burn into the furnace. The additive is composed of natural minerals and industrial wastes, and has simple components and low price. The proportion of high-speed railway Zhundong coal blending.

The invention discloses a method for preparing high-purity myrcene by pyrolyzing β-pinene. The method is as follows: mixing β-pinene with non-reactive medium gas, preheating β-pinene to below 600°C, and non-reactive The temperature of the inert medium gas is 500°C to 700°C, the temperature after gas mixing is between 520°C and 580°C, then the gas mixture passes through a tubular cracking reactor, and the residence time of the gas in the cracking tube in the cracking reactor is 0.01 to 1 second, the wall temperature is controlled at 500°C to 600°C, the pressure of the gas in the cracking reactor is controlled at 100Pa to 5000Pa, after the gas leaves the cracking reactor, it is condensed and the cracked product myrcene is recovered. The content of myrcene prepared by the present invention generally reaches more than 80%; moreover, the degree of coking in the cracking tube can be reduced.

The present invention relates to a method for refining 4-aminodiphenylamine by adopting three-column continuous rectification and intermittent distillation. The crude product of 4-aminodiphenylamine can be obtained by rectification in the column No.1, and the substances of phenylamine, phenazine and azobenzene can be obtained at the top of column, said crude product can be purified in column No.2, in the column No.3 the phenylamine is separated, and the intermittent column can be used for making batch distillation of 4-aminophenylamine made up by using column bottoms of column No.2 and returning it into column No.2 for refining it. The yield rate of its whole process can be raised to 99% from 94%, and the content of 4-aminodiphenylamine in the finished product is greater than 99 wt%, at the same time the phenylamine can be recovered, and can be used.

The invention relates to a binder-free ZSM-5 / β co-crystallized zeolite molecular sieve catalyst and its preparation method and application, which mainly solves the problem that the ZSM-5 / β-co-crystallized zeolite molecular sieve prepared by the prior art has relatively low activity when a binder is contained. The problem of poor strength when low and no binder. In the present invention, the catalyst comprises the following components in terms of weight percentage: a) 87-99.25% ZSM-5 / β co-crystallized molecular sieve with a shape index of 3-100; b) 0.5-5% Mg, Ca, Sr , Ba at least one element; c) 0.2~5% of at least one element in V, Cr, Mn, Fe, Co, Ni; d) 0.05~3% of La, Ce, Pr, Nd at least The technical scheme of an element solves the problem well, and the prepared catalyst can be used in the industrial production of methanol to propylene.