Abstract: The present invention relates to a process for preparing ammonium (meth-) acrylate, aqueous ammonium (meth-) acrylate solutions obtainable by such process, and (meth-) acrylic acid homopolymers or copolymers obtainable by polymerizing such ammonium (meth-) acrylate. The invention furthermore relates to a modular, relocatable bioconversion unit for manufacturing aqueous ammonium (meth-) acrylate solutions.

Abstract: Described herein are methods for the production of ammonium acrylate or salts thereof from acrylonitrile using nitrilase as a catalyst.

Abstract: Process of providing polyacrylamides to a site-of-use comprising at least the steps of mixing a polyacrylamide powder at a manufacturing site with an aqueous liquid, thereby obtaining a homogeneous aqueous polyacrylamide concentrate, transporting said concentrate in a transport unit from the manufacturing site to the site-of-use, and removing the homogeneous aqueous concentrate from the transport unit at the site-of-use. Process of treating subterranean, oil and/or gas bearing formations by injecting an aqueous treatment fluid into at least one wellbore, wherein the aqueous treatment fluid is manufactured by mixing at least an aqueous base fluid with said homogeneous aqueous polyacrylamide concentrate at the site-of-use.

Abstract: Process for producing aqueous polyacrylamide concentrates by polymerizing an aqueous solution comprising at least acrylamide thereby obtaining an aqueous polyacrylamide gel, comminuting said aqueous polyacrylamide gel and mixing it with an aqueous liquid, wherein the manufacturing steps are allocated to two different locations A and B and the process comprises the step of transporting an aqueous polyacrylamide concentrate hold in a suitable transport unit from a location A to a location B. Modular, relocatable plant for manufacturing aqueous polyacrylamide, wherein the units of the plant are located at two different locations A and B.

Abstract: Process and a plant for making polyacrylamides by polymerizing an aqueous solution comprising at least acrylamide and acrylic acid or salts thereof in the presence of initiators for radical polymerization under adiabatic conditions, wherein acrylamide and acrylic acid are stored at the site of the plant as dilute aqueous solutions in pressure-resistant tanks and also the monomer mixing vessel and the polymerization vessel are pressure-resistant. The combination of using diluted monomer solutions and pressure-resistant tanks ensures that even in case of an unintended and uncontrolled polymerization, said vessels don't burst and there is no spill out of the plant to the environment.

Abstract: Process for producing aqueous polyacrylamide solutions by polymerizing an aqueous solution comprising at least acrylamide thereby obtaining an aqueous polyacrylamide gel and dissolving said aqueous polyacrylamide gel in water, wherein the manufacturing steps are allocated to two different locations A and B and the process comprises the step of transporting an aqueous polyacrylamide gel hold in a transportable polymerization unit from a location A to a location B. The transportable polymerization unit comprises a cylindrical upper part, a conical part at its lower end, feeds for the aqueous monomer solution, a closable bottom opening, and means allowing to deploy the polymerization unit in a vertical manner.

Abstract: Process for producing aqueous polyacrylamide solutions by polymerizing an aqueous solution comprising at least acrylamide thereby obtaining an aqueous polyacrylamide gel and dissolving said aqueous polyacrylamide gel in water, wherein the manufacturing steps are allocated to two different locations A and B and the process comprises the step of transporting an aqueous polyacrylamide gel hold in a transportable polymerization unit from a location A to a location B. Modular, relocatable plant for manufacturing aqueous polyacrylamide solutions wherein the units of the plant are located at two different locations A and B.

Abstract: Process for producing aqueous polyacrylamide solutions by polymerizing an aqueous solution comprising at least acrylamide thereby obtaining an aqueous polyacrylamide gel and dissolving said aqueous polyacrylamide gel in water, wherein the process is carried out in a modular, relocatable plant. The plant preferably is deployed at a location at which aqueous polyacrylamide solutions are used, for example on an oilfield or in a mining area.

Abstract: Process of fracturing subterranean, oil-and/or gas-bearing formations by injecting an aqueous fracturing fluid into a wellbore at a rate and pressure sufficient to penetrate into the formation, and to initiate or extend fractures in the formation, wherein the aqueous fracturing fluid is obtained by mixing at least an aqueous base fluid and an aqueous polyacrylamide concentrate having a concentration of 3.1 to 14.9% by weight of polyacrylamides, relating to the total of all components of the aqueous polyacrylamide concentrate, and wherein at least a part of the aqueous fracturing fluid injected additionally comprises a proppant.

Abstract: The present invention relates to a method of storing a biocatalyst, which biocatalyst is capable of converting acrylonitrile to acrylamide, comprising the steps: (a) providing an aqueous suspension comprising the biocatalyst, which is capable of converting acrylonitrile to acrylamide, which aqueous suspension is an aqueous fermentation broth; (b) sequentially in either order or simultaneously (b) concentrating the aqueous suspension comprising the biocatalyst to a concentration of at least 3% (w/w); and (b2) reducing the temperature of the aqueous suspension comprising the biocatalyst to a temperature of below 8° C., thereby forming a concentrated aqueous suspension; and (c) maintaining the concentrated aqueous suspension of step (b) at a temperature of below 8° C. The invention also relates to a biocatalyst composition obtainable by this method and also the use of the biocatalyst composition in a process of preparing (meth-) acrylamide aqueous solution from (meth-) acrylonitrile.

Abstract: An aqueous agricultural composition includes a pesticide, water, and a co-polymer. The co-polymer is the reaction product of an acrylamide monomer and a macromonomer. The acrylamide monomer and the macromonomer react together in the absence of an anionic monoethylenically unsaturated monomer including an acidic group chosen from —COOH, —SO3H, —PO3H2 and associated salts. The disclosed aqueous agricultural composition may be incorporated into agricultural spray operations and demonstrates effective reduction of driftable droplets.

Abstract: Process for producing aqueous polyacrylamide solutions by polymerizing an aqueous solution comprising at least acrylamide obtained by hydrolyzing acrylonitrile in water in the presence of a biocatalyst capable of converting acrylonitrile to acrylamide thereby obtaining an aqueous polyacrylamide gel and dissolving said aqueous polyacrylamide gel in water, wherein the manufacturing steps are allocated to two different locations A and B and the process comprises the step of transporting an aqueous polyacrylamide gel hold in a transportable polymerization unit from a location A to a location B. The aqueous polyacrylamide gel furthermore comprises at least one stabilizer for prevention of polymer degradation.

Abstract: Process of fracturing subterranean, oil- and/or gas-bearing formations by injecting an aqueous fracturing fluid into a wellbore at a rate and pressure sufficient to penetrate into the formation, and to initiate or extend fractures in the formation, wherein the aqueous fracturing fluid is obtained by mixing at least an aqueous base fluid and an aqueous polyacrylamide concentrate having a concentration of 3.1 to 14.9% by weight of polyacrylamides, relating to the total of all components of the aqueous polyacrylamide concentrate, and wherein at least a part of the aqueous fracturing fluid injected additionally comprises a proppant.

Abstract: The present invention relates to a process for preparing ammonium (meth-) acrylate, aqueous ammonium (meth-) acrylate solutions obtainable by such process, and (meth-) acrylic acid homopolymers or copolymers obtainable by polymerizing such ammonium (meth-) acrylate. The invention furthermore relates to a modular, relocatable bioconversion unit for manufacturing aqueous ammonium (meth-) acrylate solutions.

Abstract: Process of providing polyacrylamides to a site-of-use comprising at least the steps of mixing a polyacrylamide powder at a manufacturing site with an aqueous liquid, thereby obtaining a homogeneous aqueous polyacrylamide concentrate, transporting said concentrate in a transport unit from the manufacturing site to the site-of-use, and removing the homogeneous aqueous concentrate from the transport unit at the site-of-use. Process of treating subterranean, oil and/or gas bearing formations by injecting an aqueous treatment fluid into at least one wellbore, wherein the aqueous treatment fluid is manufactured by mixing at least an aqueous base fluid with said homogeneous aqueous polyacrylamide concentrate at the site-of-use.

Abstract: Process for producing aqueous polyacrylamide concentrates by polymerizing an aqueous solution comprising at least acrylamide thereby obtaining an aqueous polyacrylamide gel, comminuting said aqueous polyacrylamide gel and mixing it with an aqueous liquid, wherein the manufacturing steps are allocated to two different locations A and B and the process comprises the step of transporting an aqueous polyacrylamide concentrate hold in a suitable transport unit from a location A to a location B. Modular, relocatable plant for manufacturing aqueous polyacrylamide, wherein the units of the plant are located at two different locations A and B.

Abstract: In order to provide a guide device which is of simple construction and allows a stable and haptically pleasing sliding function, it is proposed that the guide device comprise the following: a first guide rail; a second guide rail; a bearing device by means of which the first guide rail and the second guide rail are mounted movably relative to each other; a coupling device that is different from the bearing device for influencing a movement of the guide rails relative to each other.

Abstract: Described herein are methods for the production of ammonium acrylate or salts thereof from acrylonitrile using nitrilase as a catalyst.

Abstract: Process for producing aqueous polyacrylamide solutions by polymerizing an aqueous solution comprising at least acrylamide thereby obtaining an aqueous polyacrylamide gel and dissolving said aqueous polyacrylamide gel in water, wherein the process is carried out in a modular, relocatable plant. The plant preferably is deployed at a location at which aqueous polyacrylamide solutions are used, for example on an oilfield or in a mining area.

Abstract: Process for producing aqueous polyacrylamide solutions by polymerizing an aqueous solution comprising at least acrylamide thereby obtaining an aqueous polyacrylamide gel and dissolving said aqueous polyacrylamide gel in water, wherein the manufacturing steps are allocated to two different locations A and B and the process comprises the step of transporting an aqueous polyacrylamide gel hold in a transportable polymerization unit from a location A to a location B. Modular, relocatable plant for manufacturing aqueous polyacrylamide solutions wherein the units of the plant are located at two different locations A and B.