摘要:
The method for manufacturing a heat exchanger from a plastic material comprises feeding of at least two sheet elements, and, by means of shaping means, shaping of said sheet elements to form heat exchanger plates. The shaping means are adapted to also undertake joining the sheet elements partly along edges so that a fluid inlet and outlet are created, whereby the sheet elements are pressed together. The heat exchanger plates are stacked and joined to a heat exchanger. The stack of heat exchanger plates is welded so that the fluid inlets are fluid outlets of the respective heat exchanger plates are combined to form a common fluid inlet and a common fluid outlet, and the sides of the heat exchanger plates are welded together, so that a fully functional heat exchanger is manufactured with plastic sheets as the only raw material.
摘要:
In a drive arrangement for driving a pump of the axial-piston type, of which solely the swash-plate member (8) is shown, from a motor (1), the main novel feature is that the motor shaft (9) is directly connected or connectable to the swash-plate member (8), thus eliminating problems caused by a previously used intermediate shaft between the motor shaft and the swash-plate member.
摘要:
A chiral polymer organocatalyst comprising a main chain and side chain organocatalytic groups covalently attached to the main chain, which organocatalytic groups comprise an amino acid or amino acid derivative of the following general formula (I), in which one stereoisomeric form predominates: formula (I) wherein the catalyst is bound to the polymer main chain via R1, R2, R4, R5 or R6 through a linker (L) or direct bond, and wherein R1-R6 and Z are defined as follows: R1 is H, a naturally occurring alpha-amino acid side chain or a non-natural commercially available alpha-amino acid side chain that may contain L; R2 is H, O (doubly bonded to give a carbonyl), O-L (where L is a linker), NH-L or L; R3 is H or doubly bonded to give a carbonyl with R2 when R2 is O; R4 is H, C1-C6 alkyl or L R5 is H, CO2H, C1-C6 alkyl, benzyl, L, CONHR (in which R is alkyl, aryl, heteroaryl, arylalkyl or, heteroarylalkyl), tetrazolyl, CH2 coupled to a triazole moiety, an esterified CH2OH or CO2R (in which R is alkyl, aryl, heteroaryl, arylalkyl N or heteroarylalkyl), formula (II) or formula (III) wherein z is formula (IV) or a directed bond, X4 is H, Me3Si or Et3Si, X3 comprises a naturally-occurring alpha-amino acid side chain, H, C1-C6 alkyl or phenyl, Ar1 and Ar2 are each independently aryl or heteroaryl, and Y denotes the position of attachment to the main chain or linker; and R6 is H, CO2H3 C1-C6 alkyl, benzyl or L; and wherein the polymer organocatalyst comprises a cross-linked polymer.
摘要:
A well tasting and organoleptically acceptable vegetable protein hydrolyzate such as soy, pea or rice protein hydrolyzate is produced in high yield by a method using a combination of non-pH-stat hydrolysis and ultrafiltration. Preferably, the method is carried out by mixing a material containing at least 65% vegetable protein as dry matter and water to form a slurry containing a vegetable protein content of about 7-20%, heating the slurry to above 60.degree. C., adjusting the pH of the slurry to about 8.5, hydrolyzing the slurry with at least two different proteases to a degree of hydrolysis of between 15 and 35% without adjusting the pH during hydrolysis to produce a hydrolyzed slurry, inactivating the proteases and separating the hydrolyzed slurry with an ultrafiltration unit having a cut-off value above 5,000 to form a permeate containing the vegetable protein hydrolyzate. One protease may be obtained from B. Licheniformis and the other from B. Subtilis. The hydrolyzed slurry or the permeate may be treated with activated carbon, and the permeate may be concentrated by nanofiltration and/or by evaporation.