查询词典 sieve

The method comprises heating up the lactic acid solution to gasify at 150-200 degree C, mixing the obtained mixed vapour of lactic acid and water with the carrier gas, entering into gas-solid catalytic reactor to get the reaction product gas by the action of a modified Y zeolite molecular sieve catalytic agent and dewatering after heating up the mixed gas to 200-450 degree C, obtaining the propenoic acid solution through gas-liquid dissociation after cooling the reaction product gas, obtaining coarse propenoic acid products form the propenoic acid solution by gas stripping, azeotropic distillation, extraction and rectification in turns.

其特征在于将乳酸水溶液加热至150～200℃气化得到的乳酸-水混合蒸气与载气混合，将混合后的气体继续加热到200～450℃后进入气-固相催化反应器中经改性Y沸石分子筛催化剂作用脱水得反应产物气体，反应产物气体冷却后经气液分离得到丙烯酸溶液，丙烯酸溶液再依次经过气提、共沸蒸馏或萃取、精馏得到粗丙烯酸产品。

In order to further improve the catalytic activity and investigate the influence of catalyst acidic properties on the catalytic activity, acid-treated montmorillonite and molecular sieve Hβwere modified by loading Lewis acid and protonic acid treatment.

为了进一步提高催化剂的催化活性和考察催化剂酸性质对催化剂活性的影响，对酸化蒙脱土和Hβ分子筛进行了改性处理并考察了它们改性后的催化活性。

Results indicated that the existence of olefins in the reformate raffinate was the major factor engendering the deactivation of 5A molecular sieve.

结果表明，重整抽余油中的烯烃是引起分子筛结焦失活的主要因素。

The method can reduce residual carbon content on carbon containing molecular sieve catalyst to 0.1% by weight and produced regenerant has high structure-reserving property.

该方法可以将含碳分子筛催化剂上的残碳量降到0.1重％以下，所得再生剂具有高结构保留度。

Given the Duri oil field adjacent to the consolidation of sand there is not serious sand greatly reduced pump rod pump efficiency, and horizontal wells using the naked eye is difficult to control completion of prefabricated sieve out the sand, so the use of horizontal wells Kulin tolerance strata of sand Rodless pump artificial lift.

鉴于相邻的Duri油田有不固结砂，严重的出砂大大降低了有杆泵泵效，而水平井采用裸眼预制筛管完井难以控制出砂，因此Kulin水平井采用耐受地层出砂的无杆泵进行人工举升。

When phosphorous acid was used to synthesize SAPO molecular sieves, it was found that the relationship among the reaction mixture composition, crystallization condition and products was different from that in AlPO〓-moleeular sieve synthesis.

研究发现，亚磷酸作磷源合成磷酸铝分子筛的时候，可以拓展一些磷酸铝、硅磷酸铝分子筛合成所使用的模板剂的范围。

SAPO 34 molecular sieve ; composite template ; hydrogen fluoride ; triethylamine ; methanol ; olefin

SAPO-34分子筛；复合模板剂；氟化氢；三乙胺；甲醇；烯烃

Butane ; isomerization ; dehydroisomerization ; AlPO 11; SAPO 11; metal containing molecular sieve

正丁烷；异构化；异构脱氢； AlPO-11分子筛； SAPO-11分子筛；杂原子分子筛

It can be operate for the sorting purpose either in single sieve or multisieves with a compact structure,easy operating and repairing,smooth running,low noise,large targer materials-treating,good fineness,and wide applicability etc.

本机可用于单层或多层分级使用，既有结构紧凑、操作维修方便、运转平稳、噪音低、处理物料量大、细度小、适用性强等优点。

Highquality hydrogen for industry uses,dilute nitric acid,refined nitric acid,calcium nitrate tetrahydrate,calcium nitrate dihydrate,corrugated metal structured packing,catalyst for polyethylene,ultrahighmolecular weight polyethylene,15N labelled compounds,purificants of petrochemical industry,highmolecular flame retardants,molecular sieve desiccant,chemical machinery and equipment,separation equipment for chemical industry,testing and monitoring analyzers,detectors and equipment.

工业用优质氢，优质硝酸，硝酸钙，硝酸钙，金属规整波纹填料，聚乙烯催化剂，超高分子量聚乙烯，N15标记化合物，石化净化剂，高分子材料阻燃剂，分子筛干燥剂，化工机械和设备，化工分离设备，化工检测设备。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。