CN1014122B - Method for preparing feed protein powder, basic chromium sulfate and granular fertilizer from chrome leather residue - Google Patents
Method for preparing feed protein powder, basic chromium sulfate and granular fertilizer from chrome leather residueInfo
- Publication number
- CN1014122B CN1014122B CN88107119A CN88107119A CN1014122B CN 1014122 B CN1014122 B CN 1014122B CN 88107119 A CN88107119 A CN 88107119A CN 88107119 A CN88107119 A CN 88107119A CN 1014122 B CN1014122 B CN 1014122B
- Authority
- CN
- China
- Prior art keywords
- protein
- powder
- chrome leather
- leather
- residue
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000010985 leather Substances 0.000 title claims abstract description 36
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 108090000623 proteins and genes Proteins 0.000 title claims abstract description 32
- 102000004169 proteins and genes Human genes 0.000 title claims abstract description 32
- 239000000843 powder Substances 0.000 title claims abstract description 20
- 239000003337 fertilizer Substances 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims description 11
- DSHWASKZZBZKOE-UHFFFAOYSA-K chromium(3+);hydroxide;sulfate Chemical compound [OH-].[Cr+3].[O-]S([O-])(=O)=O DSHWASKZZBZKOE-UHFFFAOYSA-K 0.000 title claims description 7
- 229910000356 chromium(III) sulfate Inorganic materials 0.000 title description 2
- 239000011696 chromium(III) sulphate Substances 0.000 title description 2
- 235000015217 chromium(III) sulphate Nutrition 0.000 title description 2
- 239000002893 slag Substances 0.000 claims abstract description 23
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 13
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 8
- 235000012255 calcium oxide Nutrition 0.000 claims abstract description 6
- 239000000292 calcium oxide Substances 0.000 claims abstract description 5
- 235000015099 wheat brans Nutrition 0.000 claims abstract description 4
- 240000007594 Oryza sativa Species 0.000 claims abstract description 3
- 235000007164 Oryza sativa Nutrition 0.000 claims abstract description 3
- 240000008042 Zea mays Species 0.000 claims abstract description 3
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims abstract description 3
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims abstract description 3
- 235000005822 corn Nutrition 0.000 claims abstract description 3
- 235000009566 rice Nutrition 0.000 claims abstract description 3
- 239000000706 filtrate Substances 0.000 claims description 10
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 9
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- 239000004202 carbamide Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 235000019750 Crude protein Nutrition 0.000 claims description 5
- 239000012141 concentrate Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 239000003054 catalyst Substances 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 4
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000012065 filter cake Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000004459 forage Substances 0.000 claims description 3
- 238000005469 granulation Methods 0.000 claims description 3
- 230000003179 granulation Effects 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000004090 dissolution Methods 0.000 claims description 2
- 235000013312 flour Nutrition 0.000 claims description 2
- 230000007062 hydrolysis Effects 0.000 claims description 2
- 238000006460 hydrolysis reaction Methods 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000002156 mixing Methods 0.000 claims 1
- 238000000465 moulding Methods 0.000 claims 1
- 238000000751 protein extraction Methods 0.000 claims 1
- 230000006920 protein precipitation Effects 0.000 claims 1
- 239000000284 extract Substances 0.000 abstract description 7
- 239000002910 solid waste Substances 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 235000019752 Wheat Middilings Nutrition 0.000 abstract 1
- 239000000969 carrier Substances 0.000 abstract 1
- 150000001844 chromium Chemical class 0.000 abstract 1
- 239000002440 industrial waste Substances 0.000 abstract 1
- 239000001117 sulphuric acid Substances 0.000 abstract 1
- 235000011149 sulphuric acid Nutrition 0.000 abstract 1
- 235000018102 proteins Nutrition 0.000 description 25
- 239000011651 chromium Substances 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 9
- 229910052804 chromium Inorganic materials 0.000 description 6
- 238000000967 suction filtration Methods 0.000 description 6
- GRWVQDDAKZFPFI-UHFFFAOYSA-H chromium(III) sulfate Chemical compound [Cr+3].[Cr+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRWVQDDAKZFPFI-UHFFFAOYSA-H 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 235000001014 amino acid Nutrition 0.000 description 3
- 229940024606 amino acid Drugs 0.000 description 3
- 150000001413 amino acids Chemical class 0.000 description 3
- BFGKITSFLPAWGI-UHFFFAOYSA-N chromium(3+) Chemical compound [Cr+3] BFGKITSFLPAWGI-UHFFFAOYSA-N 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 244000089742 Citrus aurantifolia Species 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000004475 Arginine Substances 0.000 description 1
- 235000019733 Fish meal Nutrition 0.000 description 1
- WHUUTDBJXJRKMK-UHFFFAOYSA-N Glutamic acid Natural products OC(=O)C(N)CCC(O)=O WHUUTDBJXJRKMK-UHFFFAOYSA-N 0.000 description 1
- 239000004471 Glycine Substances 0.000 description 1
- QNAYBMKLOCPYGJ-REOHCLBHSA-N L-alanine Chemical compound C[C@H](N)C(O)=O QNAYBMKLOCPYGJ-REOHCLBHSA-N 0.000 description 1
- LEVWYRKDKASIDU-IMJSIDKUSA-N L-cystine Chemical compound [O-]C(=O)[C@@H]([NH3+])CSSC[C@H]([NH3+])C([O-])=O LEVWYRKDKASIDU-IMJSIDKUSA-N 0.000 description 1
- AGPKZVBTJJNPAG-WHFBIAKZSA-N L-isoleucine Chemical compound CC[C@H](C)[C@H](N)C(O)=O AGPKZVBTJJNPAG-WHFBIAKZSA-N 0.000 description 1
- FFEARJCKVFRZRR-BYPYZUCNSA-N L-methionine Chemical compound CSCC[C@H](N)C(O)=O FFEARJCKVFRZRR-BYPYZUCNSA-N 0.000 description 1
- QIVBCDIJIAJPQS-VIFPVBQESA-N L-tryptophane Chemical compound C1=CC=C2C(C[C@H](N)C(O)=O)=CNC2=C1 QIVBCDIJIAJPQS-VIFPVBQESA-N 0.000 description 1
- OUYCCCASQSFEME-QMMMGPOBSA-N L-tyrosine Chemical compound OC(=O)[C@@H](N)CC1=CC=C(O)C=C1 OUYCCCASQSFEME-QMMMGPOBSA-N 0.000 description 1
- KZSNJWFQEVHDMF-BYPYZUCNSA-N L-valine Chemical compound CC(C)[C@H](N)C(O)=O KZSNJWFQEVHDMF-BYPYZUCNSA-N 0.000 description 1
- 239000001888 Peptone Substances 0.000 description 1
- 108010080698 Peptones Proteins 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 108010009736 Protein Hydrolysates Proteins 0.000 description 1
- MTCFGRXMJLQNBG-UHFFFAOYSA-N Serine Natural products OCC(N)C(O)=O MTCFGRXMJLQNBG-UHFFFAOYSA-N 0.000 description 1
- AYFVYJQAPQTCCC-UHFFFAOYSA-N Threonine Natural products CC(O)C(N)C(O)=O AYFVYJQAPQTCCC-UHFFFAOYSA-N 0.000 description 1
- 239000004473 Threonine Substances 0.000 description 1
- QIVBCDIJIAJPQS-UHFFFAOYSA-N Tryptophan Natural products C1=CC=C2C(CC(N)C(O)=O)=CNC2=C1 QIVBCDIJIAJPQS-UHFFFAOYSA-N 0.000 description 1
- KZSNJWFQEVHDMF-UHFFFAOYSA-N Valine Natural products CC(C)C(N)C(O)=O KZSNJWFQEVHDMF-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 235000004279 alanine Nutrition 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- ODKSFYDXXFIFQN-UHFFFAOYSA-N arginine Natural products OC(=O)C(N)CCCNC(N)=N ODKSFYDXXFIFQN-UHFFFAOYSA-N 0.000 description 1
- 229940055042 chromic sulfate Drugs 0.000 description 1
- 150000001845 chromium compounds Chemical class 0.000 description 1
- 235000019784 crude fat Nutrition 0.000 description 1
- 229960003067 cystine Drugs 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001079 digestive effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 210000003238 esophagus Anatomy 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000004467 fishmeal Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 235000013922 glutamic acid Nutrition 0.000 description 1
- 239000004220 glutamic acid Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 235000014304 histidine Nutrition 0.000 description 1
- 150000002411 histidines Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229960000310 isoleucine Drugs 0.000 description 1
- AGPKZVBTJJNPAG-UHFFFAOYSA-N isoleucine Natural products CCC(C)C(N)C(O)=O AGPKZVBTJJNPAG-UHFFFAOYSA-N 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 235000005772 leucine Nutrition 0.000 description 1
- 150000002614 leucines Chemical class 0.000 description 1
- 235000018977 lysine Nutrition 0.000 description 1
- 150000002669 lysines Chemical class 0.000 description 1
- 229930182817 methionine Natural products 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 235000019319 peptone Nutrition 0.000 description 1
- 235000008729 phenylalanine Nutrition 0.000 description 1
- 150000002994 phenylalanines Chemical class 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 231100000175 potential carcinogenicity Toxicity 0.000 description 1
- 239000003531 protein hydrolysate Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000009270 solid waste treatment Methods 0.000 description 1
- -1 suction filtration Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- OUYCCCASQSFEME-UHFFFAOYSA-N tyrosine Natural products OC(=O)C(N)CC1=CC=C(O)C=C1 OUYCCCASQSFEME-UHFFFAOYSA-N 0.000 description 1
- 239000004474 valine Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Images
Landscapes
- Fertilizers (AREA)
Abstract
The invention belongs to the technical field of industrial waste residue treatment. In order to solve the problem that a large amount of chrome leather slag (solid waste) discharged in the leather-making industry pollutes the environment, the waste is subjected to resource treatment. The invention decolourizes the chrome leather residue in an alkaline medium and extracts protein, and prepares high-quality feed protein powder by taking three powders (or wheat middling, corn powder, rice bran, wheat bran and the like) as carriers. The filter residue is used as leather tanning agent to extract chromium salt with dilute sulphuric acid. The residual residue is neutralized by quicklime powder to prepare granular fertilizer.
Description
The invention belongs to the technical field of Solid Waste Treatment.
The said chrome leather slag of the present invention is meant spares the tailing of cutting leather bits that processing produces, removing from office slag and produce when cutting out after tannery is to chrome tannings such as ox-hide, pigskin, sheepskins.Chrome leather slag contains moisture about 50%, about 30% protein and the chromium of 1-3%.
The chrome leather slag quantity of leather industry discharging is big, easily corrupt smelly and stripping trivalent chromium Cr(III when stacking) and the Cr VI Cr(VI of potential carcinogenicity is arranged on a small quantity), serious environment pollution is detrimental to health.For the existing last 100 years history of the processing of chrome leather slag, the past is mainly carried out twice laid, as makes regenerated leather, synthetic surfactant Lamepon A, dye-fixing agent, leather filler and produce peptone and hide glue etc.Recent two decades comes, and the leather industry development is very fast, and the quantity of chrome leather slag increases day by day, and the prior art of these twice laids can not adapt to requirement, and the technology that has can produce secondary environmental pollution, and what have can not utilize in a large number because of product marketing is bad.So for a large amount of chrome leather slags, mostly adopt methods such as heap buries, burning, anaerobic fermentation to handle, this causes environmental pollution again, can not really deal with problems.
Closely for some years, from chrome leather slag, extract protein as feed addictive and extract trivalent chromium and seen that as leather retanning agent bibliographical information is arranged, wherein representationally be:
1, Holloway, D.F. separates recovery nutrient protein hydrolysate and chromium compound from chrome leather slag, United States Patent (USP), 4,100,154(1978).
2, Guardini, G. extracts protein and chromium sulfate from the chrome leather waste material, French Patent (FRP), 2,520,641(1983).
3, Hou Jie, Malaysian is medium, the separation and the application of protein in tannery's chrome tanning onal, the light industry environmental protection, (3), 53-55(1986).
4, in the Malaysian, Hou Jie, Liu Zhengshu etc., chromium taning cutting skin crumbs produce the application study of proteins additive, the light industry environmental protection, (4), 8-10(1986)
Above-listed prior art is basic identical, with lime basic hydrolysis chrome leather slag, extracts protein and makes feed addictive, and the chromium sulfate that extracts in the chromium mud with sulfuric acid is used as leather retanning agent again.But the weak point of these technology is to obtain protein liquid, and this can not adapt in production of fodder, needs increase equipment, changes production technology.In addition, the filter residue behind the extraction protein does not utilize, and still can cause environmental pollution.
The objective of the invention is to solve more up hill and dale chrome leather slag the pollution of environment is also therefrom reclaimed useful resources, overcome the deficiencies in the prior art part, proposed to utilize the chromium slag to produce forage protein powder, basic chromic sulfate and the complete new method of granulated fertilizer.This new method and new technology is fit to that fully this solid waste of chrome leather slag is carried out heavy industrialization to be handled.
Content of the present invention can be illustrated with technological process block-diagram (seeing accompanying drawing).
Take by weighing a certain amount of chrome leather slag, add entry and make it submergence, add the quick lime of 3-7% and 1% catalyst (urea) again, descend to be incubated a few hours at 85-90 ℃ and dissolve into smalls, filter while hot then until chrome leather slag.Filtrate neutralizes with 1: 2 phosphoric acid, have milky protein to separate out this moment, leach protein, filtrate obtains the protein concentrate liquid that concentration is 30-40% through evaporation and concentration, and will wet albumen and protein concentrate liquid and carrier (three powder, inferior powder, corn flour, rice bran, wheat bran etc.) are by 1: the weight ratio of 0.7-0.9 is mixed to stir, and is extruded into slice with single lead screw ex truding briquetting machine, oven dry, pulverize, cross 60 mesh sieves, promptly getting outward appearance is that light coffee color, crude protein content are the novel fodder albumen powder of 40-60%.
Filter residue behind the extraction protein contains Cr(OH)
3Protein and some other solid impurities with residual are dissolved with 1: 4 sulfuric acid, and after filtration, its filter residue neutralizes with quick lime, granulation then, are drying to obtain granulated fertilizer.Its filtrate is chromium sulfate, is heated to 50-60 ℃, regulates pH7.5-7.8 with sodium carbonate, forms the basic chromic sulfate floccule body, and filtration, drying can directly be used as leather tanning agent.
The present invention has following characteristics compared with the prior art:
1, the present invention fully is used to chrome leather slag as previously mentioned, does not have residue and waste water, eliminates the pollution to environment fully.And existing technology still has residue, can cause secondary pollution to environment.
2, the present invention is catalyst with urea, can shorten the reaction time, and the recovery rate of protein and digestive utilization ratio all obviously improve.Technology of the present invention can be carried out plant-scale production.Existing technology is ground into buffings with chrome leather slag, heats, filters to extract protein.This method only is suitable for laboratory test and small lot batch manufacture, lacks industrial value.
3, can produce the novel fodder albumen powder similar to fish meal with technology of the present invention, be suitable for producing mixed feed, the factory that produces mixed feed does not need to change technology or increase equipment.What yet prior art was produced is liquid protein, (the used raw material moisture content of mixed feed must not be higher than 16% because of its moisture is too high, mixed feed finished product moisture content is generally below 13%), existing equipment can not use, even concentrate drying also is ground into solid pure protein powder, also, when cooperating, feed is difficult for being uniformly dispersed because of its easy moisture absorption caking and deliquescence.Moreover the granule true protein has viscosity, and can be bonded on the esophagus of letting animals feed influences the animal feed even cause a disease dead.
4, the basic chromic sulfate of producing with method of the present invention can directly be used as the process hides tanning agent.
5, the granulated fertilizer that goes out with explained hereafter of the present invention can be used as fertilizers for potted flowers and dry land fertilizer.
One embodiment of the present of invention are below proposed:
1, moisture content is 48% ox-hide chrome leather slag 100 gram addings 500 ml waters, 3 gram quick limes and 1 gram urea, and insulation is 4 hours under 85-90 ℃, protein is dissolved in the alkaline medium in the chrome leather slag at this moment, becomes protein extract, forms Cr(OH)
3Be deposited in the residue.
2, the suction filtration while hot of the mixture after above-mentioned reaction is finished, filter residue gives over to the extraction chromium sulfate, and filtrate neutralize with 1: 2 phosphoric acid, has milky protein to separate out, suction filtration, filter cake is the albumen that wets, filtrate evaporation and concentration to concentration is 30-40%.
3, above-mentioned protein concentrated solution and wet albumen are measured protein content with Kjeldahl, and calculating crude protein is 32 grams (yield 32%).Protein concentrated solution and wet albumen and 48 are restrained the carrier wheat bran mix, be extruded into the slice of Φ 3-4 millimeter, 80 ℃ of oven dry with make-up machine, pulverize, cross 60 mesh sieves, promptly get the novel fodder albumen powder of light coffee color, crude protein content 46.21%, crude fibre 5.3%, crude fat 0.76%, ash content 5.53%, calcium 0.53%, phosphorus 0.94%, Cr(III) content is no more than 2ppm, and the amino acid analysis result is as follows:
Amino acid content (mg/100mg) amino acid content (mg/100mg)
L-aminobutanedioic acid 2.90 leucines 1.64
Threonine 0.84 tyrosine 0.60
Serine 1.40 phenylalanines 1.04
Glutamic acid 5.62 lysines 1.52
Glycine 10.58 histidines 0.44
Alanine 4.52 arginine 3.38
Valine 1.52 proline-4 .21
Methionine 0.34 tryptophan 0.12
Isoleucine 0.94 cystine 0.33
4, the filter residue in above-mentioned second step dissolves with 1: 4 dilute sulfuric acid, suction filtration, and filtrate is heated to 50-60 ℃, stir, slowly add sodium carbonate to pH value of solution 7.5-7.8, blue green floccule body appears in this moment, stops to add thermal agitation, suction filtration, filter cake is basic chromic sulfate, can directly be used as leather tanning agent, and filtrate is water white transparency, can directly discharge its COD and BOD and Cr(III) all do not exceed standard by the analysis of national standard unified approach.
5, the filter residue general pH behind above-mentioned 1: 4 sulfuric acid dissolution, the suction filtration all is higher than 5.5(if suction filtration is bad, residual a small amount of sulfuric acid in the filter residue, and then filter residue is acid, need to neutralize with calcium lime powder), through granulation and drying, can make granulated fertilizer, it is good especially to make fertilizers for potted flowers, wherein the Cr(III) content is lower than 300ppm.
Claims (3)
1, a kind of chrome leather slag that utilizes is produced the forage protein powder, the method of basic chromic sulfate and granulated fertilizer, it is characterized in that may further comprise the steps: chrome leather slag quick lime heating hydrolysis, 85-90 ℃ of insulation down, add urea as catalysts, filter the reaction back, filtrate neutralizes with 1: 2 phosphoric acid, produce the part protein precipitation, filter, the filtrate vacuum concentrates the back and wet albumen filter cake is common and carrier (three powder, inferior powder, corn flour, rice bran, wheat bran etc.) mixing and stirring, through moulding, oven dry, pulverize, making crude protein content is the novel fodder albumen powder of 40-60%; Filter residue behind the extraction protein filters with 1: 4 sulfuric acid dissolution, and filtrate is heated to 50-60 ℃, regulates pH7.5-7.8 with sodium carbonate, produces floccule body, filters, and drying promptly gets basic chromic sulfate as leather tanning agent; With back granulation, drying, promptly get granulated fertilizer in the filter residue usefulness quick lime.
2, the method for claim 1 is characterized in that Protein Extraction reaction is to carry out with urea under the condition that is catalyst, the urea that is added in chrome leather slag heavy 1%.
3, as claim 1,2 described methods, it is characterized in that wet albumen that filtration obtains and concentrating filter liquor to protein content be behind the 30-40% protein concentrate liquid together with carrier (three powder etc.) by 1: the weight ratio of 0.7-0.9 is mixed and made into the forage protein powder that crude protein content is 40-60%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN88107119A CN1014122B (en) | 1988-10-17 | 1988-10-17 | Method for preparing feed protein powder, basic chromium sulfate and granular fertilizer from chrome leather residue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN88107119A CN1014122B (en) | 1988-10-17 | 1988-10-17 | Method for preparing feed protein powder, basic chromium sulfate and granular fertilizer from chrome leather residue |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1041547A CN1041547A (en) | 1990-04-25 |
| CN1014122B true CN1014122B (en) | 1991-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN88107119A Expired CN1014122B (en) | 1988-10-17 | 1988-10-17 | Method for preparing feed protein powder, basic chromium sulfate and granular fertilizer from chrome leather residue |
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| Country | Link |
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| CN (1) | CN1014122B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009037792A1 (en) * | 2009-08-18 | 2011-02-24 | Bader Gmbh & Co. Kg | Process for the production of leather pellets |
| CN102898240B (en) * | 2012-10-29 | 2014-03-05 | 罗星 | Method for preparing amino acid chelated fertilizer by using chrome leather solid wastes |
| CN103054275A (en) * | 2012-11-30 | 2013-04-24 | 张建武 | Machining process for producing shoe components by recycling shoemaking scraps |
| CN103143551B (en) * | 2013-03-28 | 2015-05-06 | 王全杰 | Original form dechroming method for chrome leather fragment, and application of product thereof in fertilizer aspect |
| CN103626280A (en) * | 2013-12-17 | 2014-03-12 | 四川省银河化学股份有限公司 | Comprehensive treatment method for organic wastewater containing inorganic salt and waste residue containing chromium |
| CN105237059B (en) * | 2015-10-12 | 2019-03-01 | 中国科学院过程工程研究所 | A kind of chromium slag biologic detoxication and the method for preparing bio-organic fertilizer |
| CN106955888B (en) * | 2017-03-30 | 2019-10-29 | 北京高能时代环境技术股份有限公司 | The stabilization method of waste residue containing Cr, Cr contaminated soil or combinations thereof |
| CN110698303A (en) * | 2019-11-29 | 2020-01-17 | 宁波丰科源农业科技有限公司 | Method for preparing humus organic fertilizer |
| CN112916589A (en) * | 2021-02-26 | 2021-06-08 | 丁吉东 | Method for treating chromium-containing waste in leather tanning |
-
1988
- 1988-10-17 CN CN88107119A patent/CN1014122B/en not_active Expired
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| Publication number | Publication date |
|---|---|
| CN1041547A (en) | 1990-04-25 |
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