32results about How to "Clear water phase" patented technology

The invention relates to a polyether grafted polysaccharides crude oil demulsifier and a preparation method thereof. A structure general formula of the demulsifier is as shown in formula I, and the preparation method thereof comprises the following steps: 1) performing acylation modification on chitosan, to obtain N-acylated chitosan; 2) performing aldehydes modification on a terminal hydroxyl ofmethoxypolyethylene glycol, to obtain aldehyde methoxypolyethylene glycol; 3) enabling the modified methoxypolyethylene glycol to react with N-acylated chitosan, to obtain methoxypolyethylene glycol grafted N-acylated chitosan; 4) performing carboxy alkylation modification on the methoxypolyethylene glycol grafted N-acylated chitosan, to obtain methoxypolyethylene glycol grafted N-acylated carboxyalkyl chitosan. The demulsifier is capable of using chitosan natural macromolecular compounds as a raw material, wide in source, natural, non-toxic, good in biocompatibility, and degradable. A carboxy alkyl, an acyl and a polyether side chain are introduced into a chitosan molecular chain, and through controlling a position and a substitution degree of each substituent group, a series of the efficient demulsifiers suitable for oil-in-water (O / W) emulsion is obtained.

The invention relates to a novel crude oil demulsifying agent and a preparation method thereof. A structural general formula of the novel crude oil demulsifying agent is shown as a formula I. The preparation method of the demulsifying agent comprises the following steps: 1) performing acylation modification on chitosan to obtain N-acylation chitosan; 2) performing carboxyl alkylation modificationon the N-acylation chitosan to obtain N-acylated carboxyl alkyl chitosan; 3) performing epoxidation modification on methoxypolyethylene glycol terminal hydroxyl to obtain epoxidation methoxypolyethylene glycol; 4) reacting modified methoxypolyethylene glycol with N-acylated carboxyalkyl chitosan to obtain a target product of methoxypolyethylene glycol grafted N-acylated carboxyalkyl chitosan. According to the novel crude oil demulsifying agent disclosed by the invention, chitosan natural polymer compound is utilized as a raw material; the raw material has the advantages of wide sources, natural performance, no toxin, good biocompatibility, degradation and the like; carboxyalkyl, alkyl and a polyether side chain are guided into a molecular chain of the chitosan; by means of controlling positions and substitution degrees of all substituent groups, a series of high-efficiency demulsifying agents suitable for oil-in-water (O / W) type emulsion can be prepared.

The invention relates to a novel high-efficiency crude oil demulsifying agent and a preparation method thereof. A structural general formula of the novel high-efficiency crude oil demulsifying agent is shown as a formula I. The preparation method of the demulsifying agent comprises the following steps: 1) performing acylation modification on chitosan to obtain N-acylation chitosan; 2) performing carboxyl alkylation modification on the N-acylation chitosan to obtain N-acylated carboxyl alkyl chitosan; 3) performing isocyanic esterification modification on methoxypolyethylene glycol terminal hydroxyl to obtain isocyanic esterification methoxypolyethylene glycol; 4) reacting modified methoxypolyethylene glycol with N-acylated carboxyl alkyl chitosan to obtain a target product of methoxypolyethylene glycol grafted N-acylated carboxyl alkyl chitosan. According to the novel high-efficiency crude oil demulsifying agent disclosed by the invention, chitosan natural polymer compound is utilizedas a raw material; the raw material has the advantages of wide sources, natural performance, no toxin, good biocompatibility, degradation and the like; carboxyalkyl, alkyl and a polyether side chain are guided into a molecular chain of the chitosan; by means of controlling positions and substitution degrees of all substituent groups, a series of high-efficiency demulsifying agents suitable for oil-in-water (O / W) type emulsion can be prepared.

The invention relates to a modified chitosan type crude oil demulsifier and a preparation method thereof. The structural general formula of the demulsifier is shown as formula I; the preparation method comprises the following steps: 1) performing acylation modification on chitosan to obtain N-acylated chitosan; 2) performing carboxyl alkylation on the N-acylated chitosan to obtain modified N-acylated carboxyl alkyl chitosan; 3) performing p-nitrobenzene esterification modification on the terminal hydroxyl of polyethylene glycol monomethyl ether to obtain p-nitrobenzene esterified polyethyleneglycol monomethyl ether; 4) enabling the modified polyethylene glycol monomethyl ether to react with the N-acylated carboxyl alkyl chitosan to obtain a target product polyethylene glycol monomethyl ether grafted N-acylated carboxyl alkyl chitosan. With chitosan type natural high-molecular compounds as raw materials, the modified chitosan type crude oil demulsifier provided by the invention has theadvantages of wide source, natural property, no toxicity, high biocompatibility, degradability and the like. A series of efficient demulsifiers suitable for oil-in-water (O / W) type emulsion are obtained by introducing carboxyl alkyl, acyl and polyether side chain to a chitosan molecular chain and controlling the position and substitution degree of each substituent.

The invention relates to a modified chitosan type crude oil demulsifier and a preparation method thereof. The structural general formula of the demulsifier is shown as formula I; the preparation method comprises the following steps: 1) performing alkylation modification on chitosan to obtain alkylated chitosan; 2) performing epoxidation modification on the terminal hydroxyl of polyethylene glycolmonomethyl ether to obtain epoxidized polyethylene glycol monomethyl ether; 3) enabling the modified polyethylene glycol monomethyl ether to react with the alkylated chitosan to obtain polyethylene glycol monomethyl ether grafted alkylated chitosan; 4) performing carboxyl alkylation modification on the polyethylene glycol monomethyl ether grafted alkylated chitosan to obtain polyethylene glycol monomethyl ether grafted alkylated carboxyl alkyl chitosan. With chitosan type natural high-molecular compounds as raw materials, the modified chitosan type crude oil demulsifier provided by the invention has the advantages of wide source, natural property, no toxicity, high biocompatibility, degradability and the like. A series of efficient demulsifiers suitable for oil-in-water (O / W) type emulsionare obtained by introducing carboxyl alkyl, alkyl and polyether side chain to a chitosan molecular chain and controlling the position and substitution degree of each substituent.

The invention relates to a polyethylene glycol monomethyl ether grafted alkylated carboxyalkyl chitosan type crude oil demulsifier and a preparation method thereof. The structure general formula of the demulsifier is as shown in the formula I, and the preparation method of the demulsifier comprises the followings: (1) chitosan is subjected to alkylation modification, so as to obtain alkylated chitosan; (2) the alkylated chitosan is subjected to carboxyalkylation modification, so as to obtain alkylated carboxyalkyl chitosan; (3) terminal hydroxyl of polyethylene glycol monomethyl ether is subjected to esterification modification, so as to obtain esterified polyethylene glycol monomethyl ether; and (4) the modified polyethylene glycol monomethyl ether and the alkylated carboxyalkyl chitosanare in reaction so as to obtain the polyethylene glycol monomethyl ether grafted alkylated carboxyalkyl chitosan. The chitosan type natural high-molecular compounds are used as raw materials, therefore, the crude oil demulsifier has the advantages of wide raw material sources, being natural, non-toxicity, good biocompatibility and being degradable. Carboxyalkyl, alkyl and polyether side chains areintroduced to chitosan molecular chains, and by controlling the positions and degree of substitution of the substituents, a series of efficient demulsifiers suitable for O / W type emulsion can be obtained.

The invention relates to a polyethylene glycol monomethyl ether grafted N-acylated carboxyalkyl chitosan type crude oil demulsifier and a preparation method thereof. The structure general formula of the crude oil demulsifier is as shown in the formula I, and the preparation method of the crude oil demulsifier is as follows: (1) chitosan is subjected to acylation modification, so as to obtain N-acylated chitosan; (2) the N-acylated chitosan is subjected to carboxyalkylation modification, so as to obtain N-acylated carboxyalkyl chitosan; (3) terminal hydroxyl of polyethylene glycol monomethyl ether is subjected to esterification modification, so as to obtain esterified polyethylene glycol monomethyl ether; and (4) the modified polyethylene glycol monomethyl ether and the N-acylated carboxyalkyl chitosan react, so as to obtain the polyethylene glycol monomethyl ether grafted N-acylated carboxyalkyl chitosan. The chitosan type natural high-molecular compounds are used as raw materials, therefore, the crude oil demulsifier has the advantages of wide raw material sources, being natural, non-toxicity, good biocompatibility and being degradable. Carboxyalkyl, acyl and polyether side chainsare introduced to chitosan molecular chains, and by controlling the positions and degree of substitution of the substituents, a series of efficient demulsifiers suitable for O / W type emulsion can beobtained.

The invention relates to a polyether grafted oil-in-water type crude oil demulsifier and a preparation method thereof. A structure general formula of the demulsifier is as shown in formula I, and thepreparation method thereof comprises the following steps: 1) performing aldehydes modification on a terminal hydroxyl of methoxypolyethylene glycol; 2) enabling the modified methoxypolyethylene glycolto react with chitosan, to obtain methoxypolyethylene glycol grafted chitosan; 3) performing alkylation modification on the methoxypolyethylene glycol grafted chitosan; and 4) performing carboxy alkylation modification on methoxypolyethylene glycol grafted alkylation chitosan, to obtain methoxypolyethylene glycol grafted alkylation carboxy alkyl chitosan. The demulsifier is capable of using chitosan natural macromolecular compounds as a raw material, and has the advantages of wide source, nature, non-toxicity, good biocompatibility, degradation and the like. A carboxy alkyl, an alkyl and a polyether side chain are introduced into a chitosan molecular chain, and through controlling a position and a substitution degree of each substituent group, a series of the efficient demulsifiers suitable for oil-in-water (O / W) emulsion is obtained.

The invention relates to a multi-branched type crude oil demulsifier and a preparation method thereof. The structural general formula of the multi-branched type crude oil demulsifier is shown by formula I; the preparation method comprises the following steps: 1) performing acylation modification on chitosan to obtain N-acylated chitosan; 2) performing carboxyl alkylation on the N-acylated chitosanto obtain modified N-acylated carboxyl alkyl chitosan; 3) performing amination modification on the terminal hydroxyl of polyethylene glycol monomethyl ether to obtain aminated polyethylene glycol monomethyl ether; 4) enabling the modified polyethylene glycol monomethyl ether to react with the N-acylated carboxyl alkyl chitosan to obtain a target product polyethylene glycol monomethyl ether grafted N-acylated carboxyl alkyl chitosan. With chitosan type natural high-molecular compounds as raw materials, the multi-branched type crude oil demulsifier provided by the invention has the advantagesof wide source, natural property, no toxicity, high biocompatibility, degradability and the like. A series of efficient demulsifiers suitable for oil-in-water (O / W) type emulsion are obtained by introducing carboxyl alkyl, acyl and polyether side chain to a chitosan molecular chain and controlling the position and substitution degree of each substituent.

The invention relates to a comb-shaped polymer oil-in-water type crude oil demulsifying agent and a preparation method thereof. A structural general formula of the demulsifying agent is shown as a formula I. The preparation method of the demulsifying agent comprises the following steps: 1) performing alkylation modification on chitosan to obtain alkylated chitosan; 2) performing carboxyalkylationmodification on the alkylated chitosan to obtain alkylated carboxyl alkyl chitosan; 3) performing acrylic esterification modification on methoxypolyethylene glycol terminal hydroxyl to obtain acrylated methoxypolyethylene glycol; 4) enabling modified methoxypolyethylene glycol to react with alkylated carboxyl alkyl chitosan to obtain methoxypolyethylene glycol grafted alkylated carboxyl alkyl chitosan. According to the comb-shaped polymer oil-in-water type crude oil demulsifying agent disclosed by the invention, chitosan natural polymer compounds are utilized as raw materials; the raw materials have the advantages of wide sources, natural performance, no toxin, good biocompatibility, degradation and the like; carboxyalkyl, alkyl and a polyether side chain are introduced to a molecular chain of the chitosan; by means of controlling positions and substitution degrees of all substituent groups, a series of high-efficiency demulsifying agents suitable for oil-in-water (O / W) type emulsion can be prepared.

The invention relates to a chitosan crude oil demulsifier and a preparation method thereof. A structure general formula of the demulsifier is as shown in formula I, and the preparation method thereofcomprises the following steps: 1) performing acylation modification on chitosan, to obtain N-acylated chitosan; 2) performing epoxidation modification on a terminal hydroxyl of methoxypolyethylene glycol, to obtain epoxidation methoxypolyethylene glycol; 3) enabling the modified methoxypolyethylene glycol to react with N-acylated chitosan, to obtain methoxypolyethylene glycol grafted N-acylated chitosan; and 4) performing carboxy alkylation modification on the methoxypolyethylene glycol grafted N-acylated chitosan, to obtain a target product of methoxypolyethylene glycol grafted N-acylated carboxy alkyl chitosan. The demulsifier is capable of using chitosan natural macromolecular compounds as raw materials, and has the advantages of wide source, nature, non-toxicity, good biocompatibility,degradation and the like. A carboxy alkyl, an acyl and a polyether side chain are introduced into a chitosan molecular chain, and through controlling a position and a substitution degree of each substituent group, a series of the efficient demulsifiers suitable for oil-in-water (O / W) emulsion is obtained.

The invention discloses a reusable carbon-based nano demulsifier and a preparation method thereof. The preparation method includes: reacting carbon nanotubes with a mixed acid solution to obtain oxidized carbon nanotubes containing hydroxyl and carboxyl groups on the surface; hydrolyzing an organic titanium precursor to produce nano-TiO 2 Grafted onto the surface of oxidized carbon nanotubes to obtain a reusable carbon-based nanodemulsifier. The invention also discloses the demulsifier obtained by the above preparation method. The preparation method of the demulsifier provided by the invention is simple and environmentally friendly. The demulsifier can quickly demulsify stable oily wastewater under normal temperature conditions, especially for oily wastewater with an oil content of 1%, and has a good demulsification effect. The phase is clear and can be recycled for reuse.

The invention relates to an oil-in-water type crude oil demulsifying agent and a preparation method thereof. A structural general formula of the demulsifying agent is shown as a formula I. The preparation method of the demulsifying agent comprises the following steps: 1) performing alkylation modification on chitosan to obtain alkylated chitosan; 2) performing carboxyl alkylation modification on the alkylated chitosan to obtain alkylated carboxyl alkyl chitosan; 3) performing amination modification on methoxypolyethylene glycol terminal hydroxyl to obtain aminomethoxypolyethylene glycol; 4) enabling modified methoxypolyethylene glycol to react with alkylated carboxyl alkyl chitosan to obtain a target product of methoxypolyethylene glycol grafted alkylation carboxyl alkyl chitosan. According to the oil-in-water type crude oil demulsifying agent disclosed by the invention, chitosan natural polymer compounds are utilized as raw materials; the raw materials have the advantages of wide sources, natural performance, no toxin, good biocompatibility, degradation and the like; carboxyalkyl, alkyl and a polyether side chain are guided into a molecular chain of the chitosan; by means of controlling positions and substitution degrees of all substituent groups, a series of high-efficiency demulsifying agents suitable for oil-in-water (O / W) type emulsion can be prepared.

The invention relates to a modified crude oil demulsifier and a preparation method thereof. The structural general formula of the demulsifier is shown as formula I; the preparation method comprises the following steps: 1) performing alkylation modification on chitosan to obtain alkylated chitosan; 2) performing carboxyl alkylation modification on the alkylated chitosan to obtain alkylated carboxylalkyl chitosan; 3) performing epoxidation modification on polyethylene glycol monomethyl ether to obtain epoxidation modified polyethylene glycol monomethyl ether; 4) enabling the modified polyethylene glycol monomethyl ether to react with the alkylated carboxyl alkyl chitosan to obtain polyethylene glycol monomethyl ether grafted alkylated carboxyl alkyl chitosan. With chitosan type natural high-molecular compounds as raw materials, the modified crude oil demulsifier provided by the invention has the advantages of wide source, natural property, no toxicity, high biocompatibility, degradability and the like. A series of efficient demulsifiers suitable for oil-in-water (O / W) type emulsion are obtained by introducing carboxyl alkyl, alkyl and polyether side chain to a chitosan molecular chain and controlling the position and substitution degree of each substituent.