93 results about "Dimethyl glutarate" patented technology

A continuous process for preparing lithium complex greases improved by using a complexing agent of dimethyl glutarate, dimethyl adipate, glutaric acid, adipic acid, or mixtures thereof, and preferably also a specialized flash chamber to achieve a penetration split (60X-UW) of within −20 mm / 10 to 10 mm / 10, a roll stability (D1831) of <30 mm / 10, and a dropping point (D2265) of >240° C.

A concentrated non-aqueous cleaning solution having a long shelf life includes an ester and an anhydrous surfactant. The ester is the active ingredient for dissolving graffiti, grease and other contaminants. The ester can be one of or a mixture of dimethyl glutarate, dimethyl succinate, dimethyl adipate, ethyl lactate, and a methyl ester extracted from soybean oil. The anhydrous surfactant is preferably alcohol ethoxylate. The ester in the concentrated solution does not degrade into an acid and alcohol as long as the solution is not mixed with water. This allows the concentrated solution to be shipped and stored and remain efficacious. The concentrate can be diluted with water immediately prior to use. Diluting before use makes the graffiti cleaner less expensive and prevents damage to sensitive surfaces but does not provide long enough time for the ester to degrade.

The present invention relates to liquid agricultural formulations comprising from about 15 to about 40% w / w dicamba diglycol amine, from about 1 to about 15% w / w lactofen, from about 5 to about 40% w / w of a solvent selected from the group consisting of: (1) a solvent comprising dimethyl glutarate, dimethyl succinate, and dimethyl adipate; and (2) a solvent comprising a mixture of aromatic hydrocarbons obtained from distillation of aromatic streams derived from crude oil, from about 0.5 to about 5% w / w of a thickener with the chemical formula (Mg,Al)5Si8O20×4H2O, and from about 2 to about 15% w / w of a polyarylphenyl ether sulphate, ammonium salt surfactant, and methods of use thereof.

The invention provides a liquid phase hydrofining method of 1, 5-pentanediol. According to the method, a two-step process is adopted, firstly, dimethyl glutarate is generated through an esterificationreaction, and secondly, 1, 5-pentanediol is generated through a dimethyl glutarate liquid-phase hydrogenation process by adopting a modified nickel-based supported catalyst. According to the liquid phase hydrofining method, reaction is carried out on a fixed bed hydrogenation device, the adopted catalyst is a modified nickel supported catalyst, hydrogen required by reaction is providedby a liquidcirculating material, no expensive hydrogen circulating compressor is needed to be arranged in the device, a material passing through a reactor is a single liquid phase material, the production costis reduced, and the product quality is improved.

The invention discloses rotproof and rustproof metal oil. The rotproof and rustproof metal oil is composed of the following raw materials in parts by weight: 1-2 parts of nitrilotriacetic acid, 50-60 parts of 500 sn base oil, 10-15 parts of kerosene, 2-3 parts of ethylenediamine tetraacetic acid copper disodium salt, 1-2 parts of fatty alcohol polyoxyethylene ether ammonium sulfate, 2-3 parts of dimethyl glutarate, 1-3 parts of tebelon, 2-4 parts of lanum, 0.8-2 parts of potassium citrate, 0.1-2 parts of isotridecyl alcohol ethoxylate, 0.4-1 part of dialkyl diphenol, 1-2 parts of diammonium hydrogen phosphate and 12-20 parts of rear earth corrosion inhibition hydraulic oil. The rear earth corrosion inhibition hydraulic oil is added in the rustproof oil disclosed by the invention; cis-epoxysuccinic acid is mixed with phosphate to play a good synergistic effect and ensure a stable corrosion inhibition function; the silicon aluminum sol can promote the compatibility of the materials and perfect the film forming effect of the finished product; the added rear earth ions can generate an insoluble complex with OH<-> generated in an oxygen uptake corrosion process with the surface of a metal base material, in order to alleviate the corrosion electrode reaction to play a good slow release effect.

The invention discloses a method for purifying diacid dimethyl esters by plate distillation separation. The distillation separation is successively finished in three series-wound distillation towers. The bottom of a second distillation tower is vertically provided with a separator plate, which divides the bottom cavity into a first tower chamber and a second tower chamber. A material inlet of the second distillation tower is positioned below the top of the separator plate. The method provided by the invention comprises the following steps of: mixing a raw material with diacid dimethyl esters, allowing the mixture to enter into the first distillation tower, separating a light component out from the top of first distillation tower, allowing the material at the tower bottom to enter into the second distillation tower, separating 1,4-succinic acid dimethyl ester out from the top of the distillation tower, separating 1,5-dimethyl glutarate out from the bottom of the second tower chamber of the second distillation tower, allowing the material at the tower bottom of the first tower chamber of the second distillation tower to enter into the third distillation tower, separating 1,6-adipic acid dimethyl ester out from the top of the third distillation tower, and discharging a heavier component in the raw material from the tower bottom. Starting with the first distillation tower, the temperature of the distillation towers successively rises and the pressure successively reduces.