67results about How to "Good hydrolytic stability" patented technology

The invention relates to high base number (TBN400) vulcanized alkyl phenol calcium and a preparation method thereof. The vulcanized alkyl phenol calcium has a chemical structure as right. The preparation method is as follows: in a system containing solvent and diluent oil, alkyl phenol compound, shielded phenol compound, calcium oxide and / or calcium hydroxide and sulfur are subjected to sulfonation / neutralization reaction at a temperature of between 60 and 180 DEG C to generate phenolate intermediate; balanced calcium oxide and / or calcium hydroxide are added into the mixture, carbon dioxide is introduced, and the mixture is subjected to carbonation reaction; and alkyl polylol is added into the mixture at the sulfonation / neutralization reaction or respectively at the sulfonation / neutralization reaction and the carbonation reaction to participate in the reaction, long-chain carboxylic acid is added into the mixture at the sulfonation / neutralization reaction or respectively at the sulfonation / neutralization reaction and the carbonation reaction to participate in the reaction, and products are obtained through refining. The vulcanized alkyl phenol calcium has the characteristics of high base number, low viscosity, low precipitation number, good heat storage stability, and the like, and has excellent combination property, does not cause environmental protection problem during use, and belongs to an environment-friendly product, and adopts a one-stage process, has mild reaction conditions, and is easy to filter.

The present invention discloses zinc-free high pressure anti-wear hydraulic oil. The oil comprises the following components, by mass, 98-99% of base oil, 0.1-1.0% of an antioxidant, 0.2-1.0% of an extreme pressure anti-wear agent, 0.01-0.1% of a rust inhibitor, 0.01-0.1% of a metal passivating agent, 0.01-0.1% of a lustration dispersant and 0.0001-0.001% of an antifoaming agent. The present invention further discloses a preparation method for the zinc-free high pressure anti-wear hydraulic oil. The quality of the hydraulic oil of the present invention meets specification requirements of the anti-wear hydraulic oil superior product in the national standard GB1118.1-94, and can meet specification requirements of the anti-wear hydraulic oil with the highest level Dension HF-0 on the world.

The invention discloses base oil for a metal working fluid (or metal working oil) and a preparation method of the base oil. Plant oil fatty acid methyl ester is taken as a raw material, mercaptothiazole groups are introduced to double bonds, and a plant oil fatty acid methyl ester mercaptothiazole derivative is synthesized to serve as the base oil for the metal working fluid (or metal working oil) or an antiwear agent. By comparison with other plant oil type base oil, the hydrolytic stability of the plant oil fatty acid methyl ester mercaptothiazole derivative is good. The preparation steps are simple, and the reaction conditions are mild.

The invention discloses an antirust agent and a preparing method thereof. The antirust agent comprises fatty acid, alcohol amine compounds, boric acid and a catalyst; the molar ratio of the fatty acid to the alcohol amine compounds to the boric acid is 5:2:1-1:1:1. The preparing method of the antirust agent comprises the steps that fatty acid is put into a reactor, and heating stirring is carried out; when the temperature rises to the first preset temperature, the alcohol amine compounds and the catalyst are added, a condensate backflow device is started; when the temperature rises to the second preset temperature, boric acid is added, and temperature rising is continuously carried out; when the temperature rises to the third preset temperature, the condensation backflow device is closed, the temperature continuously rises to the fourth preset temperature, heating is stopped, and heat preservation is carried out; after heat preservation is ended, cooling is carried out. The prepared antirust agent is long in antirust effective period, and has the good anti-wear anti-friction capacity, hydrolytic stability and biodegradability.

The invention discloses ship side thruster hydraulic oil which is formed through the following way: pentaerythritol ester and poly-alpha olefin are compounded, the mixture is used as base oil, and then the base oil is combined with multiple composite additives including an antiwear agent, an antioxygen, an anti-foaming agent, an anti-emulgator, an antirust agent, a metal deactivator, a friction improver and a corrosion inhibition assistant. The ship side thruster hydraulic oil can form a protective film on the surface of a hydraulic kinematic pair, resist pollution of seawater and has excellent anti-rust property, abrasion resistance, hydrolysis stability and emulsion resistance; in addition, the air release property and the anti-foaming property of the ship side thruster hydraulic oil are also excellent.

The invention belongs to the technical field of mechanical lubrication, particularly relates to synthetic refrigerating machine oil and a preparation method thereof, and solves the problems of higher pour point, poor dispersion stability, poor viscosity and the like of refrigerating machine oil in the prior art. The refrigerating machine oil comprises the following raw materials in percentage by weight: 10 to 50 percent of naphthenic base oil, 48 to 88 percent of alkylbenzene oil, 1.5 to 2.5 percent of additive and the balance of defoaming agent. According to the invention, the naphthenic base oil with excellent low-temperature performance and good solubility is adopted; and the alkyl benzene oil with a low pour point and good low-temperature fluidity is adopted as a main raw material, and the alkyl benzene oil and the naphthenic base oil are highly soluble by selecting a reasonable ratio. The obtained refrigerating machine oil is appropriate in viscosity, excellent in low-temperature performance, hydrolytic stability and solubility and good in compatibility with mineral oil and ester oil. The preparation method is simple, adopts a pulse blending treatment technology, and is efficient, energy-saving, easy for industrial production and widely applicable.

The invention relates to bio-based dimethoxyl alkane diesel oil and a preparation method thereof. The bio-based dimethoxyl alkane diesel oil is characterized by being a mixture comprising dimethoxyl-1-methyl butane, bis-bidimethyl-1-methyl butane and tri-bidimethyl-1-methyl butane, wherein the mixture is prepared by carrying out reaction on 2-methyltetrahydrofuran, produced from a wood fiber biomass, and dimethyl ether on an acid supported catalyst through a condensing process. The diesel oil has the advantages that ether fuel is produced by taking 2-methyltetrahydrofuran produced from the wood fiber biomass as the raw material, the raw material is low in price and easily available, and the product has low condensation point, high heat value, good lubrication and low corrosivity, so that the deficiency of existing ether diesel oil is overcome. Meanwhile, the diesel oil provided by the invention is superior to fatty acid methyl ester biological diesel oil in the aspects of low temperature, oxidation stability and hydrolyzing stability. The diesel oil provided by the invention and petroleum diesel oil can be dissolved in any ratio.

The invention discloses a preparation process of high-base value sulfurized alkyl salicylate. The preparation process comprising the following steps: firstly taking salicylic acids and long-chain alkenes as initiators, performing alkylation reaction under the action of a polar catalyst to prepare alkyl salicylate and preparing a high-base value (TBN) 350 mgKOH / g) sulfurized alkyl salicylate product through neutralization, vulcanization and high alkalization reactions of the alkyl salicylate. The preparation process disclosed by the invention has the benefits that a continuous synthesis processis adopted, reaction conditions are mild, the product has a higher base value, contains no free phenol and has excellent high temperature detergency, oxidation resistance and abrasion resistance, thereby being a comprehensive, environmentally-friendly and energy-saving product.