# US 2014/0194331 A1 · High performance biohydraulic fluid > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0194331 A1 - Document ID: US20140194331A1 - Status: Published application - Kind: A1 - Application number: 14/152,188 - Filed: 2014-01-10 - Published: 2014-07-10 - Earliest claimed: 2013-01-10 - Assignees: Washington State University - Applicants: Washington State University - Inventors: Thomas Q. Chastek - Web page: https://patentgrep.com/patent/US20140194331A1 ## CPC - C10M 105/38: of polyhydroxy compounds - C10M 2207/2835: used as base material - C10M 2207/401: used as base material - C10N 2020/067: {Unsaturated Compounds} - C10N 2030/12: Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives - C10N 2030/64: {Environmental friendly compositions} - C10N 2040/08: Hydraulic fluids, e.g. brake-fluids - C10N 2070/00: Specific manufacturing methods for lubricant compositions - C10M: LUBRICATING COMPOSITIONS (well drilling compositions C09K8/02); USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION (mould release, i.e. separating, agents for metals B22C3/00, for plastics or substances in a plastic state, in general B29C33/56, for glass C03B40/02; textile lubricating compositions D06M11/00, D06M13/00, D06M15/00; immersion oils for microscopy G02B21/33) - C10N: INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS ## Abstract A biohydraulic fluid which has high performance attributes and which is environmentally acceptable includes trimethylolpropane (TMP) esterified to monounsaturated fatty acids of unsaturated vegetable oils or vegetable oil blends. The process for making the TMP esters can be accomplished in a manner similar to biodiesel production wherein methyl oleates obtained from reacting methanol with the vegetable oils or vegetable oil blends are reacted with TMP. Production of the TMP esters can be achieved without the use of catalysts. ## Claims ### Claim 1 A biohydraulic fluid, comprising: 60% or more by weight of a synthetic trimethylol propane (TMP) esterified with monounsaturated fatty acid moieties of a first vegetable oil or mixture of vegetable oils, wherein said first vegetable oil or mixture of vegetable oils contains at least 70% monounsaturated fatty acids; and at least 20% or more by weight of a second vegetable oil or mixture of vegetable oils, wherein said first and second vegetable oil or mixture of vegetable oils may be the same or different. ### Claim 2 (depends on 1) The biohydraulic fluid of claim 1 wherein said monounsaturated fatty acid moieties include oleic acid. ### Claim 3 (depends on 1) The biohydraulic fluid of claim 1 further comprising one or more additives selected from the group consisting of antioxidants, antiwear agents, corrosion inhibitors, pour point depressants, and antifoam agents. ### Claim 4 (depends on 1) The biohydraulic fluid of claim 1 wherein said synthetic TMP esterified with monounsaturated fatty acid moieties of said first vegetable oil or mixture of vegetable oils is approximately 72% by weight of said biohydraulic fluid, and wherein said second unsaturated vegetable oil or mixture of unsaturated vegetable oils is approximately 24% by weight of said biohydraulic fluid, and wherein said first and second unsaturated vegetable oils or mixtures of unsaturated vegetable oils are the same, and wherein said biohydraulic fluid includes approximately 3% by weight of one or more additives selected from the group consisting of antioxidants, antiwear agents, corrosion inhibitors, pour point depressants, and antifoam agents. ### Claim 5 (depends on 1) The biohydraulic fluid of claim 1 wherein either or both said first and second unsaturated vegetable oil or mixture of unsaturated vegetable oils includes both sunflower and safflower oils. ### Claim 6 A method for preparing a trimethylolpropane (TMP) base fluid for a lubricant, comprising the steps of: reacting an unsaturated vegetable oil with methanol to prepare a biodiesel containing methyloleates and other waste organics; separating glycerol from said biodiesel; and reacting said methyloleates in said biodiesel with TMP to produce a mixture containing TMP esters. ### Claim 7 (depends on 6) The method of claim 6 further comprising the steps of washing said mixture containing TMP esters; and separating water and methyl oleate from said mixture containing TMP esters. ### Claim 8 (depends on 6) The method of claim 6 wherein either or both reacting steps are performed without a catalyst. ### Claim 9 (depends on 6) The method of claim 6 wherein said reacting said methyloleates step produces methanol, and further comprising the step of recycling the methanol produced in said reacting methyloleates step for use in said reacting an unsaturated vegetable oil step. ### Claim 10 A method for preparing a biohydraulic fluid, comprising the steps of: preparing a trimethylolpropane (TMP) base fluid by reacting a first unsaturated vegetable oil or mixture of unsaturated vegetable oils with methanol to prepare a biodiesel containing methyloleates and other waste organics; separating glycerol from said biodiesel; reacting said methyloleates in said biodiesel with TMP to produce a mixture containing TMP esters; washing said mixture containing TMP esters; and separating water and biodiesel from said mixture containing TMP esters to produce a TMP base fluid; combining said TMP base fluid with a second unsaturated vegetable oil or mixture of unsaturated vegetable oils which may be the same or different from said first unsaturated vegetable oil or mixture of unsaturated vegetable oils; and adding one or more additives to a formulation of said TMB base fluid and said a second unsaturated vegetable oil or mixture of unsaturated vegetable oils. ### Claim 11 (depends on 10) The method of claim 10 wherein said step of preparing a TMP base fluid is performed without using catalysts. ### Claim 12 (depends on 10) The method of claim 10 wherein said first and second unsaturated vegetable oils or mixtures of unsaturated vegetable oils are the same. ### Claim 13 (depends on 10) The method of claim 10 wherein said one or more additives are selected from the group consisting of antioxidants, antiwear agents, corrosion inhibitors, pour point depressants, and antifoam agents. ### Claim 14 (depends on 10) The method of claim 10 wherein said reacting said methyloleates step produces methanol, and further comprising the step of recycling the methanol produced in said reacting methyloleates step for use in said reacting an unsaturated vegetable oil step. ### Claim 15 (depends on 10) The method of claim 10 further comprising the step of recycling biodiesel obtained in said separating step for use in said reacting said methyloleates in said biodiesel step.