摘要:
Provided are a leather improving agent which exhibits the effect of suppressing contraction of hide to enlarge the area; and a method for treating leather using the leather improving agent. The leather improving agent comprises an M23A subfamily protease as an active ingredient.
摘要:
The invention concerns a process for tanning hide to obtain leather. The general process for obtaining the intermediary wet blue stage comprises the following steps: a) a picking step with acid and salt, followed by b) a tanning step with chromium salt, followed by c) a basification step. The invention is characterized in that the bath of the pickling step comprises organic acids selected from 2-Methyl glutaric acid (MGA), ethyl succinic acid (ESA) and mixture thereof instead of the traditional strong acid, generally sulfuric acid This process requires less basification agent and enables an increase of the up-taking of the re-tanning products. This invention provides leather with improved mechanical properties.
摘要:
The invention concerns a process for tanning hide to obtain leather. The general process for obtaining the intermediary wet blue stage comprises the following steps: a) a picking step with acid and salt, followed by b) a tanning step with chromium salt, followed by c) a basification step. The invention is characterized in that the bath of the pickling step comprises organic acids selected from 2-Methyl glutaric acid (MGA), ethyl succinic acid (ESA) and mixture thereof instead of the traditional strong acid, generally sulfuric acid This process requires less basification agent and enables an increase of the up-taking of the re-tanning products. This invention provides leather with improved mechanical properties.
摘要:
The invention relates to cleaning and food processing aide applications whereby unique compositions of GRAS or food additives were developed to assess the effectiveness of cleaning procedures at various stages of the processes and to assess the delivery and adherence of food processing aides. Employing such solutions to clean and/or sanitize processing equipment provides a method to evaluate and enhance the effectiveness of procedures used to remove the respective fluorescent detergents, sanitizers or organic residues from equipment or niches and reduce contamination. Similar compositions were developed for assessing processing aide food surface coverage, contact time and adherence. In addition, unique compositions were invented that increase processing aide coverage and adherence. Quantification of the presence or absence of the fluorescent GRAS or food additive compositions produces results for validation, monitoring and/or verification of food safety intervention procedures/processes.
摘要:
The present invention pertains to a process for decreasing and/or drying skins which comprises contacting the skins to be degreased and/or dried with one or more extractor solvents which are able to dissolve both fat and water. Preferably, the extractor solvent is selected from the group consisting of dimethyl ether (DME), methylal, dioxolane, diethyl ether, methyl ethyl ketone, ethanol, propanol, and isopropanol. Most preferably, the extractor solvent is DME.
摘要:
Aqueous formulations are prepared by a process wherein at least one cyclic compound of the formula I is heated in the presence of water and of an acidic catalyst and, during or after the heating, H—X—R3 is at least partially separated off, where, in formula I, X is selected from oxygen, sulfur and N—R6, R3 and R6 are identical or different and are selected from C1-C12-alkyl, C3-C12-cycloalkyl, substituted or unsubstituted, C7-C13-aralkyl, C6-C14-aryl, substituted or unsubstituted, formyl, CO—C1-C12-alkyl, CO—C3-C12-cycloalkyl, substituted or unsubstituted, CO—C7-C13-aralkyl, CO—C6-C14-aryl, where, if X is N—R6, R3 and R6 may be linked to one another with formation of a ring; R1, R2 and R4 are identical or different and are selected from hydrogen, C1-C12-alkyl, C3-C12-cycloalkyl, substituted or unsubstituted, C7-C13-aralkyl, C6-C14-aryl, substituted or unsubstituted, it being possible in each case for two neighboring radicals to be linked to one another with formation of a ring; n is an integer from 1 to 4; R5 are identical or different and are selected from hydrogen, C1-C12-alkyl, C3-C12-cycloalkyl, substituted or unsubstituted, C7-C13-aralkyl, C6-C14-aryl, substituted or unsubstituted, it being possible for R5 to be linked to R4 or in each case two neighboring radicals R5 to be linked to one another with formation of a ring.
摘要:
A method for preparing unhaired hides ready for tanning from hides and skins using proteolytic and lipolytic enzymes in the beamhouse, whereby in at least one of the partial steps of the beamhouse consisting of a) liming in the pH range 11.5-14 and b) bating in the pH range 5-11.5, alkaline lipases (E.C.3.1.3.) having an activity optimum in the pH range 9-11 are added to the aqueous floats corresponding to these partial steps.
摘要:
There is described a method for treating delimed and bated hides, i.e. pelts. According to the inventive method, the pelts are brought to a suitable mineral tanning state and then tanned with mineral salts. The inventive treatment process corresponds to the conventional processes of pickling, tanning and basifying. The inventive method includes the treatment of pelts with weakly acid treatment liquids while supplying carbon dioxide and additions of tanning mineral substances subsequent to pretreatment, without or with the addition of solely a small amount of liquid, wherein the quantity of treatment liquid is supplemented after a predetermined treatment time.
摘要:
A method of tanning an animal skin with wool or hair attached thereto wherein the animal skin is pickled in an acidic solution and thereafter tanned in a solution containing at least one tanning agent characterised in that the animal skin is picked and tanned while a holding agent is present on the wool or hairs and is thereafter scoured so to remove the holding agent.
摘要:
Biologically stable, fungistatic and bacteriostatic, untanned wet animal hides intrinsically insensitive to mildews, devoid of coloration and chromium values and containing from 50% to 70% of water, from 5% to 30% of inorganic matter, from 0.5% to 1.5% of Al.sub.2 O.sub.3 and from 85% to 90% of dermal material, are produced by impregnating pickled hides with a basic aluminum polychloride or polychlorosulfate and then alkalyzing the medium of impregnation.