Please select the most similar patent number from A, B, C and D. Which number is?
An environmentally-friendly fin stamping oil, consisting of a narrow-cut isoparaffin base oil, a volatile synthetic ester, a Guerbet alcohol, and a copper corrosion inhibitor. The mass percent of the narrow-cut isoparaffin base oil in the fin stamping oil is 90%-95%; the mass percent of the volatile synthetic ester in the fin stamping oil is 1%-5%; the mass percent of the Guerbet alcohol in the fin stamping oil is 1%-5%; and the mass percent of the copper corrosion inhibitor in the fin stamping oil is 0.1%-0.5%. Also provided is a preparation method for the fin stamping oil, comprising: adding a narrow-cut isoparaffin base oil to a reaction kettle; then adding a volatile synthetic ester, a Guerbet alcohol, and a copper corrosion inhibitor; and stirring the mixture at room temperature to obtain an environmentally-friendly fin stamping oil. The present invention has a closed-cup flash point that may be more than 80°C, safety far greater than a conventional fin stamping oil, and volatility that may reach 100% at 140°C within 5 minutes, is gentle to hand, non-corrosive, and environmentally friendly, and features good biodegradability.
A: Provided are a corrosion inhibitor having hydrate inhibition functions, a preparation method therefor and use thereof. The corrosion inhibitor comprises the following components by mass percentage: 1-30% of a halogenated pyridine quaternary ammonium salt, 55-94% of a solvent and 0.1-15% of an auxiliary agent. The corrosion inhibitor prepared in the present invention can simultaneously achieve corrosion protection and hydrate inhibition functions in steel pipeline devices, and further has the advantages of simple preparation compared with similar technologies. The corrosion inhibitor has a corrosion inhibition rate higher than 90% for corrosion of 20 # steel materials in an environment of 10-60 °C and H 2 S-CO 2 -Cl - and a degree of supercooling higher than 6 °C.
B: The present invention relates to a sealant composition for repairing punctures on a tire and a preparation method therefor. The sealant composition comprises 80-95% in weight percentage of a liquid carrier, 0.1-10% in weight percentage of a gel material derived from a water-soluble polymer, 1-10% in weight percentage of a latex, 0.1-5% in weight percentage of rigid particles and 0.1-5% in weight percentage of a surfactant. 0.1-1% in weight percentage of additives, such as a defoaming agent, a preservative, an anti-corrosive agent, a colourant, a flavouring agent etc., can also be added into the sealant as required. The present invention also relates to a preparation method for the sealant composition.
C: A tri-component mixing working medium suitable for waste heat recovery power cycle in an internal combustion engine, consisting of CO2, pentane, and a refrigerant. The refrigerant is any one of difluoromethane, fluorethan, and 1,1-difluoroethane. Depending on different selected refrigerants, the mass percentage of the components is as follow as: the mass percentage of CO2/pentane/difluoromethane is 30-70/10-20/10-60; the mass percentage of CO2/pentane/fluorethan is 30-70/10-20/10-50; the mass percentage of CO2/pentane/1,1-difluoroethane is 10-70/10-30/10-60. The tri-component mixing working medium has good environmental protection, safety, and thermodynamic property, and the thermal efficiency greater than 12%, can efficiently recycle the engine smoke and the waste heat energy of cylinder liner water, has the utilization rate of smoke greater than 60% and the utilization rate of cylinder liner water of 100%, and has the critical temperature significantly improved compared with that of CO2. The cooling condition of a system is relaxed to meet the waste heat recovery system requirement for a vehicle.
D: Provided are a long-life synthetic high-temperature chain oil and method for preparation thereof; the total amount of synthetic ester base oil is 100 parts, and additives are 11.95–36.25 parts. Base oil is added to a product kettle for preheating; MDI is added to the product kettle, and upon stirring, is caused to melt completely, and is stirred for reaction; isotridecanol is slowly added to the product kettle, and warms upon being stirred, causing the materials in the kettle to react at a constant temperature of approximately 85–95°C; then water is added to the kettle and the constant-temperature stirring reaction is continued; heating up to 110–120°C is performed, and vacuum stirring and dehydration are performed; the vacuum is released and heating is stopped; high-temperature antioxidant, high-temperature anti-scorching agent, cleaning dispersant, and copper corrosion inhibitor are added to the kettle in sequence, and stirring is performed at constant temperature for 25–35 minutes; extreme pressure anti-wear additive is added to the kettle, and stirring is performed for 10–15 minutes to obtain a synthetic high-temperature chain oil. The present invention has outstanding oxidation stability, strong chain adhesion, high temperature of usage, and a long service life.
Answer: D