CN101486619B - Process for preparing seaweed urea - Google Patents

Process for preparing seaweed urea Download PDF

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Publication number
CN101486619B
CN101486619B CN2009100147170A CN200910014717A CN101486619B CN 101486619 B CN101486619 B CN 101486619B CN 2009100147170 A CN2009100147170 A CN 2009100147170A CN 200910014717 A CN200910014717 A CN 200910014717A CN 101486619 B CN101486619 B CN 101486619B
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China
Prior art keywords
urea
seaweed
extracted liquor
concentrated
marine alga
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CN2009100147170A
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Chinese (zh)
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CN101486619A (en
Inventor
单俊伟
王海华
李秀珍
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中国海洋大学生物工程开发有限公司
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Abstract

The invention provides a method for preparing seaweed urea. Firstly, a concentrated seaweed extract is prepared; during the prilling process of urea, the concentrated seaweed extract and a fused urea solution are evenly mixed, wherein, the weight proportion of the concentrated seaweed extract and the urea added is 50 to 200:1000; then prilling is conducted in a prilling tower to prepare seaweed urea products. After the prilling of the concentrated seaweed extract and the fused urea, the concentrated seaweed extract exists in the form of solid seaweed extract, wherein, the weight percentage of the solid seaweed extract in the seaweed urea is 0.5 percent to 2 percent and the weight percentage of the urea is 98 percent to 99.5 percent. The combination of seaweed and urea can greatly improve the absorption and utilization ratio of urea, and meanwhile has the function of restraining the fast decomposition of urea contents and slowing down loss, thus effectively solving the problem of soil deterioration in current fertilization.

Description

The preparation method of seaweed urea

Technical field

The invention belongs to the urea production technical field, is a kind of preparation method of seaweed urea specifically.

Background technology

The soil fertility of China biases toward the chemical fertilizer input at present, and ignores the use of organic fertilizer.China accounts for the arable land in the world 10% and has but consumed the chemical fertilizer in the world 30%, and the chemical fertilizer input amount of unit cultivated area is 2.8 times of the average consumption in the world.Wherein nitrogen fertilizer amount occupies first of the chemical fertilizer, and urea is the outstanding person in the nitrogenous fertilizer, and its nitrogen content is the main source of manure of agricultural up to 46.8%.But it is the unit quick-acting fertilizer after all, and nitrogen use efficiency is low, has only about 36% according to its utilization ratio of research.The serious situation that China has occurred is the high Fertilization Level of agricultural, and low utilization rate of fertilizer has caused the significant wastage of resource, and urea has ten million ton of loss every year.Utilization rate of fertilizer is low, and soil-borne disease insect pest aggravation causes severe environmental pollution and agricultural product quality to descend, and threatens the Sustainable development of national food safety and agricultural to a great extent.

Marine alga is handled through special biochemical process; Extract its elite material; Greatly kept the natural radioactivity component; Be rich in kind of mineral element and abundant VITAMINs surplus potassium, calcium, magnesium, iron, zinc, the iodine etc. 40 in the marine alga, contain peculiar Sargassum polysaccharides in the marine alga, protein, amino acid, highly unsaturated fatty acids and multiple natural phant growth regulator especially, have very high biological activity.

How marine alga is organically combined with urea, improve the absorption rate of urea, solve existing fertilizer and absorb too low problem, this is the problem that the present invention faces.

Summary of the invention

The objective of the invention is problem to the prior art existence; A kind of preparation method of seaweed urea is provided; Marine alga is combined with urea; Can improve the absorption rate of urea greatly, also play simultaneously and suppress the effect that urea components decomposes and slow down loss fast, solve the low excessively problem of fertilizer efficiency utilization ratio that exists in the urea fertilising effectively.

The objective of the invention is to realize through following technical scheme: a kind of preparation method of seaweed urea is characterized in that the preparation method is following:

Concentrate the preparation of seaweed extracted liquor earlier, in the granulation process of urea, will concentrate seaweed extracted liquor and fusing urea solution uniform mixing; Wherein, The part by weight that concentrates seaweed extracted liquor and urea is 50-200: 1000, then in the prilling tower granulation, process the seaweed urea product.

Improvement to above-mentioned preparation method: after concentrating seaweed extracted liquor and fusing urea granulation; Concentrated seaweed extracted liquor finally exists with the form of marine alga elite solid substance; Its weight percentage in seaweed urea is 0.5%-2%, and the weight of urea percentage composition is 98%-99.5%.

Further improvement to above-mentioned preparation method: described concentrated seaweed extracted liquor is to be carried, filter, concentrate and obtain through alkali by marine alga; Concentrate contain at least in the seaweed extracted liquor Tang oligosaccharide, plant-growth regulator, iodine and in, trace element, in, trace element is selected from calcium, magnesium, sulphur, copper, iron, manganese, zinc, boron, molybdenum.

Further improvement to above-mentioned preparation method: the concrete preparation process of described concentrated seaweed extracted liquor is: the marine alga of 50 weight parts and the water of 1000-1500 weight part are joined in the extractor; Add alkali 5-15 weight part then, and be warming up to the 60-80 degree gradually, be incubated 1-2 hour; Open then to stir and continue to extract 50-70 minute; Open dispensing valve after extraction is accomplished and filter, will filtrate vacuum concentration 2-3 times at last, described alkali is yellow soda ash or salt of wormwood or Pottasium Hydroxide.

Further improvement to above-mentioned preparation method: described marine alga is sea-tangle or Enteromorpha or sargassun or bulk kelp.

Further improvement to above-mentioned preparation method: described seaweed urea is the faint yellow particle of full dissolubility, and the marine alga smell is arranged, nitrogenous >=46%.

The present invention compared with prior art has many advantages and positively effect:

The present invention between its molecule is connected the fully reaction under the high-pressure smelting state that is combined in of marine alga and urea with chemical bond, the adding of marine alga can obviously improve specific absorption and the utilization ratio of crop to urea; Significantly improve crop quality, the structure of improving the soil promotes the formation of soil aggregate; Recover the soil lac balance that over-burden loses with chemical pollution; Help crop root growth,, alleviate aspects such as chemical fertilizer is out of proportion and have great importance improving farmland ecological environment.The present situation that China uses chemical fertilizer in a large number can be effectively alleviated in the use of seaweed urea, and it is healthy, fast-developing to promote China's green agriculture, has great importance to realizing China's agricultural sustainable development.

Contain abundant marine active composition in the marine alga synergistic urea according to the present invention's production; Wherein contain peculiar Sargassum polysaccharides in the marine alga, protein, amino acid, highly unsaturated fatty acids and multiple natural phant growth regulator; Have very high biological activity, also contain kind of mineral element and abundant VITAMINs surplus potassium, calcium, magnesium, iron, zinc, the iodine etc. 40.Especially the natural phant hormone in the marine alga, like plant hormone, Plant hormones regulators,gibberellins, type phytokinin, polyphenolic substance etc., but the generation of non-specific active factor in the stimulating plant body, the balance of regulating endogenous hormones.Materials such as the natural antibiotics that contains in the marine alga, polysaccharide, iodine have antibacterial significantly, antiviral and anthelminthic effect, and fertile medicine economic benefits and social benefits can be alleviated China's agricultural Drug abuse phenomenon to a certain extent, reduce environmental pollution.

Embodiment

The present invention is a kind of preparation method of seaweed urea, and concrete preparation method is following:

Concentrate the preparation of seaweed extracted liquor earlier, marine alga is mainly sea-tangle or Enteromorpha or sargassun or bulk kelp.The marine alga of 50 weight parts and the water of 1000-1500 weight part are joined in the extractor; Add alkali (alkali is yellow soda ash or salt of wormwood or Pottasium Hydroxide) 5-15 weight part then, and be warming up to the 60-80 degree gradually, be incubated 1-2 hour; Then; Open to stir and continue to extract 50-70 minute, open dispensing valve after extraction is accomplished and filter, the vacuum concentration 2-3 that will filtrate at last doubly; Concentrate contain in the seaweed extracted liquor Tang oligosaccharide, plant-growth regulator, iodine and in, the micro-element nutrition material, in, trace element is selected from calcium, magnesium, sulphur, copper, iron, manganese, zinc, boron, molybdenum.

In the granulation process of urea, will concentrate seaweed extracted liquor and fusing urea solution uniform mixing, wherein, the part by weight that concentrates seaweed extracted liquor and urea is 50-200: 1000, then in the prilling tower granulation, process the seaweed urea the finished product.Concentrated seaweed extracted liquor finally exists with the form of marine alga elite solid substance, and its weight percentage in seaweed urea is 0.5%-2%, and the weight of urea percentage composition is 98%-99.5%.Seaweed urea is the faint yellow particle of full dissolubility, and the marine alga smell is arranged, nitrogenous >=46%.

Instance 1:

Get the 30kg sea-tangle, add 800kg water, add 6kg yellow soda ash then, be warming up to 65 ℃, be incubated 2 hours, open stirring then, continue to stir and extracted 50-60 minute.With extracting liquid filtering, concentrated, before the granulating working procedure of urea production, add concentrated seaweed extracted liquor, the part by weight of contract seaweed extracted liquor and urea is 15: 100, then, carries out granulation and promptly obtains seaweed urea.

Instance 2:

Get the 30kg Enteromorpha, add 800kg water, add 3kg sodium hydroxide then, be warming up to 70 ℃, be incubated 1.5 hours, open stirring then, continue to stir and extracted 60 minutes.With extracting liquid filtering, concentrated, before the granulating working procedure of urea production, add concentrated seaweed extracted liquor, the part by weight of contract seaweed extracted liquor and urea is 10: 100, then, carries out granulation and promptly obtains seaweed urea.

Instance 3:

Get the 35kg sargassun, add 800kg water, add 6kg salt of wormwood then, be warming up to 75 ℃, be incubated 80 minutes, open stirring then, continue to stir and extracted 60-65 minute.With extracting liquid filtering, concentrated, before the granulating working procedure of urea production, add concentrated seaweed extracted liquor, the part by weight of contract seaweed extracted liquor and urea is 5: 100, then, carries out granulation and promptly obtains seaweed urea.

Instance 4:

Get the 30kg bulk kelp, add 800kg water, add 6kg yellow soda ash then, be warming up to 80 ℃, be incubated 1 hour, open stirring then, continue to stir and extracted 70 minutes.With extracting liquid filtering, concentrated, before the granulating working procedure of urea production, add concentrated seaweed extracted liquor, the part by weight of contract seaweed extracted liquor and urea is 20: 100, then, carries out granulation and promptly obtains seaweed urea.

Certainly, above-mentioned explanation is not to be limitation of the present invention, and the present invention is not limited to above-mentioned giving an example, those skilled in the art, and in essential scope of the present invention, the variation of making, remodeling, interpolation or replacement all should belong to protection scope of the present invention.

Claims (3)

1. the preparation method of a seaweed urea is characterized in that, the preparation method is following:
Concentrate the preparation of seaweed extracted liquor earlier, in the granulation process of urea, will concentrate seaweed extracted liquor and fusing urea solution uniform mixing; Wherein, The part by weight that concentrates seaweed extracted liquor and urea is 50-200: 1000, then in the prilling tower granulation, process the seaweed urea product; After described concentrated seaweed extracted liquor and the fusing urea granulation, concentrated seaweed extracted liquor finally exists with the form of marine alga elite solid substance, and its weight percentage in seaweed urea is 0.5%-2%, and the weight of urea percentage composition is 98%-99.5%; Described concentrated seaweed extracted liquor is to be carried, filter, concentrate and obtain through alkali by marine alga; Concentrate contain at least in the seaweed extracted liquor Tang oligosaccharide, plant-growth regulator, iodine and in, trace element, in, trace element is selected from calcium, magnesium, sulphur, copper, iron, manganese, zinc, boron, molybdenum; The concrete preparation process of described concentrated seaweed extracted liquor is: the marine alga of 50 weight parts and the water of 1000-1500 weight part are joined in the extractor; Add alkali 5-15 weight part then, and be warming up to the 60-80 degree gradually, be incubated 1-2 hour; Open then to stir and continue to extract 50-70 minute; Open dispensing valve after extraction is accomplished and filter, will filtrate vacuum concentration 2-3 times at last, described alkali is yellow soda ash or salt of wormwood or Pottasium Hydroxide.
2. according to the preparation method of the described seaweed urea of claim 1, it is characterized in that described marine alga is sea-tangle or Enteromorpha or sargassun or bulk kelp.
3. according to the preparation method of the described seaweed urea of claim 2, it is characterized in that described seaweed urea is the faint yellow particle of full dissolubility, has the marine alga smell, nitrogenous >=46%.
CN2009100147170A 2009-03-02 2009-03-02 Process for preparing seaweed urea CN101486619B (en)

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Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101891546B (en) * 2010-07-17 2013-01-09 山东恩宝生物科技有限公司 Alginic acid envelope sustained-release urea with urease inhibiting effect and preparation method thereof
CN102503707A (en) * 2011-11-22 2012-06-20 史丹利化肥股份有限公司 Melted pelleting seaweed stable fertilizer and preparation method thereof
CN102503705B (en) * 2011-11-22 2013-09-04 史丹利化肥股份有限公司 Melted pelleting green seaweed compound fertilizer and preparation method thereof
CN102515945B (en) * 2011-12-06 2014-02-05 中国农业科学院农业资源与农业区划研究所 Algae-enhanced urea, production method thereof, and purpose thereof
CN102584448B (en) * 2012-02-17 2013-09-04 武汉艾利特化肥有限公司 Compound fertilizer
CN102765999B (en) * 2012-07-25 2014-12-24 北京雷力海洋生物新产业股份有限公司 Algal polysaccharide modified urea and preparation method thereof
CN102795937A (en) * 2012-09-06 2012-11-28 青岛丰泰海洋生物科技有限公司 Seaweed oligosaccharide synergistic urea and preparation method thereof
CN103980040B (en) * 2014-04-17 2016-08-17 威海温喜生物科技有限公司 A kind of double algae oligosaccharide granular fertilizer and preparation method thereof
CN104261952B (en) * 2014-09-29 2016-03-02 史丹利化肥股份有限公司 A kind of containing algae essence swollen fruit type macroelement Water soluble fertilizer and preparation method thereof
CN105985199A (en) * 2015-02-07 2016-10-05 中国海洋大学 Method for preparing high quality seaweed fertilizer from eucheuma compound enzymatic hydrolysate
CN104761348A (en) * 2015-03-25 2015-07-08 山东恩宝生物科技有限公司 Alginic acid containing compound fertilizer with urease inhibiting effect and production method of alginic acid containing compound fertilizer
CN104876709A (en) * 2015-05-18 2015-09-02 国家海洋局第三海洋研究所 Method for preparing seaweed liquid fertilizer from seaweed
CN104909965B (en) * 2015-06-08 2017-10-31 青岛海大生物集团有限公司 The preparation method of chitin modified urea
CN105693379B (en) * 2016-01-20 2019-11-08 领先生物农业股份有限公司 A kind of seaweed polyglutamic acid urea and its production method
CN106397029A (en) * 2016-08-31 2017-02-15 山东雷力绿色肥业有限公司 High-activity seaweed compound fertilizer and preparation method thereof
WO2020044189A1 (en) 2018-08-28 2020-03-05 Sabic Global Technologies B.V. Seaweed extract coated fertilizer for better crops and soil health

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CN1528715A (en) * 2003-10-15 2004-09-15 上海申任生物工程有限公司 Liquid fertilizer and preparing method thereof
CN1559993A (en) * 2004-03-03 2005-01-05 中国科学院水生生物研究所 Composite manure for blue alga of water bloom and preparation method thereof

Patent Citations (2)

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CN1528715A (en) * 2003-10-15 2004-09-15 上海申任生物工程有限公司 Liquid fertilizer and preparing method thereof
CN1559993A (en) * 2004-03-03 2005-01-05 中国科学院水生生物研究所 Composite manure for blue alga of water bloom and preparation method thereof

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Address after: 266071, room 508, Science Park, Qingdao National University, 23 East Hongkong Road, Laoshan District, Shandong, Qingdao

Patentee after: Qingdao Seawin Biotech Group Co., Ltd.

Address before: 508 room 23, Ocean University, 266071 Hongkong East Road, Qingdao, Shandong

Patentee before: China Ocean University Organism Project Development Co., Ltd.

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Address before: 266071, room 508, Science Park, Qingdao National University, 23 East Hongkong Road, Laoshan District, Shandong, Qingdao

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