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1.
本文依据相图分析利用制盐母液提取无水钾镁矾,其主要目的,除去母液中SO=4离子减少氯化钠含量,不兑卤直接生产氯化钾,同时将提取无水钾镁矾作为钾镁复合肥使用,另外,还可以将无水钾镁矾与氯化钾转化成硫酸钾  相似文献   

2.
在硫酸钠型矿卤日晒制盐过程中,为了保证池盐产品的质量和产量,最终会产生一定量的制盐母液。制盐母液需要进行妥善的处理,否则会导致一定的环保问题。本文针对江苏瑞泰公司母液处理问题,初步探讨母液循环利用工艺。该工艺在输卤源头提供低硝卤水的基础上,实现母液在日晒制盐过程中的完全循环再利用,以彻底解决母液处理问题,达到绿色环保的目的。  相似文献   

3.
在以制盐母液为原料的七水硫酸镁生产过程中,母液中钠镁比值较高,自由水量较低,硫酸镁产品产量和质量都相对较低。通过研究发现,在原料中兑入一定比例的氯化镁废液,降低钠镁比值,增加自由水量,使硫酸镁收率由不足35%提高到50%,粗镁质量由85%提高到95%以上,氯化钠含量由先前的8%降到2%以下。  相似文献   

4.
本文介绍卧螺沉降离心机在制盐石膏母液处理中的应用,实现了对制盐母液中的氯化钠饱和溶液回收利用,解决了石膏型卤水制盐过程中石膏带来的环保、原卤成分恶化、产品质量下降等一系列问题。  相似文献   

5.
本文主要介绍了制盐石膏处理新工艺的变革及在生产中的应用情况,该工艺开创了制盐母液处理的先河,将厢式压滤机成功地应用在工艺之中并将石膏处理工艺变得更为简单化,为制盐工业石膏母液的处理提供了发展方向。  相似文献   

6.
利用硫酸镁母液生产芒硝工艺的研究山西省运城盐化局贺春宝,陈振中关键词芒硝,湖盐卤水,转化1前言近年来,运城盐湖为了保证芒硝的质量和产量,开始从产硝母液中提取硫酸镁,但是并没有重视产镁母液的处理和利用。每年排出的产镁母液,有的白白扔掉,有的随意越冬析出...  相似文献   

7.
电站脱硫废水硫酸钙饱和,主要含硫酸镁和氯化钠等组分。本文通过电站脱硫废水零排放石灰、纯碱法或烧碱、纯碱法预处理工艺分析成本很高。建议参考制盐钙型卤水石膏晶种法工艺蒸发浓缩脱硫废水、冷冻分离浓缩液中硫酸镁盐、制镁母液蒸发制盐、制盐母液干化杂盐工艺,供同行参考。  相似文献   

8.
滩田饱和卤水直接进罐精制盐的新工艺   总被引:1,自引:1,他引:0  
利用滩田饱和卤水直接进蒸发罐蒸发结晶制取氯化钠,在制盐过程中采取三次洗涤方法,除去钙镁离子,以获得纯度超过99.1%的氯化钠和浓度较高的制盐母液.  相似文献   

9.
严红九 《苏盐科技》2003,(3):6-6,11
通过对制盐生产过程中母液成份的跟踪化验分析,综合考虑母液排放对盐产品质量、产量及成本的影响,找出母液的合理排放点和排放量,并对制盐母液今后的综合利用进行展望。  相似文献   

10.
公司引进厢式压滤机处理制盐母液已三年多了,通过不断实践摸索,运用越来越成熟,石膏产品质量大大改善,为制盐母液处理找到新出路.  相似文献   

11.
Since grapevine ( Vitis spp .) rootstock material is being traded increasingly as disbudded woody material a lack of distinctive morphological features on such material necessitates an alternative and reliable means of identification. Methods described here were developed for rapid and efficient extraction of DNA from woody samples rich in phenolic compounds and polysaccharides, and for subsequent identification of varieties by RAPD PCR. Using these methods, and with the application of only one selected RAPD primer, we were able to differentiate sixteen rootstock varieties, including the seven varieties most commonly used in Germany. Problems commonly encountered with reproducibility of RAPD patterns were avoided by choosing primers with a dinucleotide sequence and a high G/C content that allowed a rather high annealing temperature of 45°C. Methods described here should also be useful for other horticultural crops, especially those with woody tissues rich in phenolic compounds and polysaccharides.  相似文献   

12.
An internet website (http://cpf.jrc.it/smt/) has been produced as a means of dissemination of methods of analysis and supporting spectroscopic information on monomers and additives used for food contact materials (principally packaging). The site which is aimed primarily at assisting food control laboratories in the European Union contains analytical information on monomers, starting substances and additives used in the manufacture of plastics materials. A searchable index is provided giving PM and CAS numbers for each of 255 substances. For each substance a data sheet gives regulatory information, chemical structures, physico-chemical information and background information on the use of the substance in particular plastics, and the food packaging applications. For monomers and starting substances (155 compounds) the infra-red and mass spectra are provided, and for additives (100 compounds); additionally proton NMR are available for about 50% of the entries. Where analytical methods have been developed for determining these substances as residual amounts in plastics or as trace amounts in food simulants these methods are also on the website. All information is provided in portable document file (PDF) format which means that high quality copies can be readily printed, using freely available Adobe Acrobat Reader software. The website will in future be maintained and up-dated by the European Commission's Joint Research Centre (JRC) as new substances are authorized for use by the European Commission (DG-ENTR formerly DGIII). Where analytical laboratories (food control or other) require reference substances these can be obtained free-ofcharge from a reference collection housed at the JRC and maintained in conjunction with this website compendium.  相似文献   

13.
The characterization of the aromatic profile of several apricot cultivars with molecular tracers in order to obtain objective data concerning the aromatic quality of this fruit was undertaken using headspace–solid phase microextraction (HS–SPME). Six apricot cultivars were selected according to their organoleptic characteristics: Iranien, Orangered, Goldrich, Hargrand, Rouge du Roussillon and A4025. The aromatic intensity of these varieties measured by HS–SPME–Olfactometry were defined and classified according to the presence and the intensity of grassy, fruity and apricot like notes. In the six varieties, 23 common volatile compounds were identified by HS–SPME–GC–MS. Finally, 10 compounds, ethyl acetate, hexyl acetate, limonene, β-cyclocitral, γ-decalactone, 6-methyl-5-hepten-2-one, linalool, β-ionone, menthone and (E)-hexen-2-al were recognized by HS–SPME–GC–O as responsible of the aromatic notes involved in apricot aroma and considered as molecular tracers of apricot aromatic quality which could be utilized to discriminate apricot varieties.  相似文献   

14.
The advent of the functional barrier concept in food packaging has brought with it a requirement for fast tests of permeation through potential barrier materials. In such tests it would be convenient for both foodstuffs and materials below the functional barrier (sub-barrier materials) to be represented by standard simulants. By means of inverse gas chromatography, liquid paraffin spiked with appropriate permeants was considered as a potential simulant of sub-barrier materials based on polypropylene (PP) or similar polyolefins. Experiments were performed to characterize the kinetics of the permeation of low molecular weight model permeants (octene, toluene and isopropanol) from liquid paraffin, through a surrogate potential functional barrier (25 μm-thick oriented PP) into the food simulants olive oil and 3% (w/v) acetic acid. These permeation results were interpreted in terms of three permeation kinetic models regarding the solubility of a particular model permeant in the post-barrier medium (i.e. the food simulant). The results obtained justify the development and evaluation of liquid sub-barrier simulants that would allow flexible yet rigorous testing of new laminated multilayer packaging materials.  相似文献   

15.
16.
Capillary electrophoresis (CE) and polarized light microscopy (PLM) were utilized in the detection of the adulteration of locust bean gum with guar gum. For CE analyses, standards of locust bean and guar gums were extracted with 30% CH3CN, removing the residual proteins from the gum matrix. A 8.75 mM NaH2PO4-20.6 mM Na2B4O7 buffer, pH 9, was used to separate these proteins and to identify marker proteins that were present in the guar gum. These markers did not co-migrate with components in the extracts of mechanically processed locust bean gum, and are used as indicators of adulteration. Using PLM with toluidine blue and iodine staining techniques, unadulterated locust bean gum samples were distinguished from mixed samples through the differential staining of components in locust bean versus guar and tara gums. These experiments in the use of CE and PLM provide orthogonal and complementary methods for the verification of 'true' positives and the elimination of 'false' positives.  相似文献   

17.
A 9% whey protein (WP) isolate solution at pH 7.0 was heat-denatured at 80°C for 30 min. Size-exclusion HPLC showed that native WP formed soluble aggregates after heat-treatment. Additions of CaCl2 (10–40 mM), NaCl (50–400 mM) or glucono-delta-lactone (GDL, 0.4–2.0%, w/v) or hydrolysis by a protease from Bacillus licheniformis caused gelation of the denatured solution at 45°C. Textural parameters, hardness, adhesiveness, and cohesiveness of the gels so formed changed markedly with concentration of added salts or pH by added GDL. Maximum gel hardness occurred at 200 mM NaCl or pH 4.7. Increasing CaCl2 concentration continuously increased gel hardness. Generally, GDL-induced gels were harder than salt-induced gels, and much harder than the protease-induced gel.  相似文献   

18.
An investigation is described in which various polyfunctional compounds were applied to wool in attempts to stabilize the temporary improvements in wrinkle-recovery brought about by ‘annealing’. Several reactive systems involving formaldehyde were found to produce the desired permanently improved wrinkle-recovery.  相似文献   

19.
BADGE.2HCl and BFDGE.2HCl were determined in 28 samples of ready-to-drink canned coffee and 18 samples of canned vegetables (10 corn, 5 tomatoes and 3 others), all from the Japanese market. HPLC was used as the principal analytical method and GCMS for confirmation of relevant LC fractions. BADGE.2HCl was found to be present in one canned coffee and five samples of corn, BFDGE.2HCl in four samples of canned tomatoes and in one canned corn. No sample was found which exceeded the 1mg/kg limit of the EU for the BADGE chlorohydrins. However the highest concentration was found for the sum of BFDGE.2HCl and BFDGE.HCl.H2O at a level of 1.5mg/kg. A Beilstein test confirmed that all cans containing foods contaminated with BADGE.2HCl or BFDGE.2HCl had at lest one part coated with a PVC organosol.  相似文献   

20.
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